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Based on the response surface central composite design theory, the passage discusses the effects of microwave power, slice thickness and the pulse ratio on ginger intermittent microwave drying process through response surface methodology. Simultaneously we establish quadratic polynomial regression model and optimize the drying process parameters. Results show that the influence of 3 factors on the comprehensive evaluation: The slice thickness > Microwave power > The pulse ratio. The best process parameters of ginger intermittent microwave drying is: microwave power 515W, the slice thickness 2mm, the pulse ratio 45s and the maximum comprehensive score is 0.96.

Polysaccharides are main bioactive compounds of Fomitopsis ulmaria (Sor. : For.) Bond. et Sing (F. ulmaria). In this study, microwave-assisted extraction (MAE) method was employed for the extraction of polysaccharides form F. ulmaria (PFU). The important extraction parameters that influenced the extraction yield of PFU were optimized by employing an orthogonal design, including solvent/material ratio, microwave power, and extraction time. The results showed that the optimum extraction conditions were as followings: solvent/material ratio of 40:1 ml/g, microwave power of 400 W, and extraction time of 2.5 min. Under optimized conditions, the extraction yield of PFU was 8.36%. This work is expected to provide a scientific reference for the further research and industrial production of F. ulmaria.

Microwave enhanced Fenton oxidation treatment effect of reactive yellow dye wastewater is studied. Through experimental analysis the effect of H2O2 dosage, FeSO4•7H2O dosage, microwave power, irradiation time to dye wastewater Degradation rate. Microwave enhanced Fenton oxidation process treating active yellow dye wastewater optimum conditions: pH value of 3, H2O2 volume concentration of 4mL/L, FeSO4•7H2O concentration of 200mg/L, microwave power of 500W, irradiation time of 7min. Under this condition, reactive yellow dye wastewater removal rate is 92%.

Microwave regeneration research has been conducted for the modified activated carbon (MAC) which has adsorbed 2,4,6-TCP. The effects of microwave power, microwave irradiation time and MAC loading amount for regeneration are studied.The results show that, at the beginning, the adsorption volume increases with the increase of the microwave power. However, when the power is over 450w, the adsorption volume begins to fall. The adsorption volume increases with the irradiation time,rises to its peak when irradiated for 6 minutes.The adsorption volume increases with the loading amount and rises to its peak when the amount is 5g.

This paper shows some possibilities to adjust the exposure time and output power of a given microwave device according to the process to be executed, taking into account the special operating conditions of the magnetrons and the efficiency of the microwave device. Since the exposure time is rather easy to set by means of timers, the microwave power level is difficult to modify because of the magnetron requirements voltage, current, magnetic field which must be carefully observed in order to ensure reliable operation. The research has been carried out at the University of Oradea and INCDTIM Cluj-Napoca, during the activities of the Microwave Collective of the University of Oradea and during the preparation of the doctoral thesis of Mr.Ursu.

Microwave pyrolysis of low rank coal is a new technology of cleaner production. The effect of microwave power and flow rate of N2 on the yield of pyrolysis products under N2 atmosphere was explored. The results showed that the higher microwave power was, the higher all the terminal temperature, the yield of liquid products and the weight loss rate were. The flow rate of N2 had little influence on the yield of pyrolysis solid products, while it exerted a greater influence on the yield of pyrolysis liquid products. When the low rank coal was pyrolysised under the conditions of microwave power of 800W and flow rate of N2 of 4.0×10-4 m3/min, the yield of Bluecoke and liquid products respectively reached 65.8% and 18%.

There is an increasing interest in tea polyphenols, as natural plant compounds, in food products and also in pharmaceutical products due to their multiple health care functions. In this paper, a microwave-assisted extraction method was employed for the extraction of tea polyphenols. The effects of microwave power, heating time, and ethanol concentration on extraction of tea polyphenols were investigated by single factor experiments and an orthogonal experiment [L9(3)3]. Results showed that the optimum extraction conditions were that the microwave power was 560W, the heating time was 30s, and the ethanol concentration was 40% (v/v). The antimicrobial properties of tea polyphenols were also discussed. Tea polyphenols had bacteriostatic activity against Escherichia coli and Staphylococcus aureus. This study may be valuable for the extraction and application of tea polyphenols.

A double-mesa hetero-junction bipolar structure of NPN type microwave power device is used. The Si is chosen for emitter and collector, and Si1-xGexalloy is for base. Based on some experiment data, a numerical method is used to get an equation about forbidden band Egvia the variety composition of Ge at 300K using MATLAB, which is more precise than linearization. We also calculate the collector current density JCvia the variety of VBEand the obtained equation is consistent with the experiment result. An optimum Ge composition value was found. It has practical significance for the device design and simulation.

Heating with microwave power is a process in which the materials take up electromagnetic energy volumetrically and turn it into heat inside a piece. This is the great difference from the conventional method, where the heat flows between objects by means of conduction, radiation and convection, in which the surface of the materials is heated first, and then the heat is transferred to the interior of the piece, thus forming a temperature gradient. On the other hand, microwave heating generates heat first inside the piece, heating the whole volume later. [1]

The microwave pretreatment of pineapple peel for ethanol production was optimized by RSM (Response surface methodology). Three variables, which were studied, were peel to water ratio (100-160 g/L), microwave power (90-900 watt) and time (5-20 min). The optimal condition for reducing sugar production was 132 g/L peel to water ratio, 90 watt for 12 min that provide the 10.4 g/L of highest content. For total sugar production was 160 g/L ratio, 90 watt for 20 min that gave the optimum content of 579.9 g/L. This microwave pretreatment without a reagent could achieve the satisfied sugar content for ethanol fermentation that led to save time and energy consumption.

Orthogonal experiment optimization of microwave-assisted extraction (MAE) conditions of total flavonoids from Magnolia liliflora petals with the factors of ethanol concentration, extraction time,microwave power,solid/liquid ratio on the yield of total flavonoids were studied. The results showed that optimum extracting conditions of total flavonoids from Magnolia liliflora were as follows: adding 1:10 g·mL-1 of 40% alcohol and extracting for 5 min,microwave irradiation power 464W, under the optimal conditions, the maximal yield of flavonoids was of 2.08%.

In this paper, the pyrolysis characteristics ofChlorella vulgaris(C. vulgaris) (a kind of microalgae) under different microwave power and pyrolysis atmosphere are studied by microwave oven. The results show that under N2atmosphere, a power of 1500W is required for optimal oil production, 2250W for optimal gas production and 750W for optimal residue. Under CO2atmosphere, a power of 2250W is required for maximum oil production, 1500W for maximum gas production and 750W for maximum residue.

In this research, the primary study in extracting technologies of Tea polyphends was finished. On the basis of the water lixiviation by orthogonal optimization method, extraction process of TP by microwave extraction was optimized. The best combined condition of the water lixiviation as follows: liquid-lolid ratio 25:1, extraction temperature 95°C , extraction time 20min,Under this conditions, the yield of TP is 13.993 %.And the best combined condition by microwave extraction: liquid-lolid ratio 35:1, microwave power 750 W, extraction time 18min, and the yield of TP is 20.3023 % through duplicated experiment. The results showed that compare with water lixiviation, the yield of TP was enhanced by 6.3093 % by microwave method. Meanwhile, the extraction time by microwave method was reduced greatly.

In this article, the main influence factors of ganoderma lucidum spore powder hydrolysis in pure water under microwave irradiation were studied by using the method of orthogonal experiment. Weight ratio of ganoderma lucidum spore powder to water, reaction time, microwave power and temperature was considered as the influence factors in detail. It was concluded that the temperature was the main factor in hydrolytic process. The order of the influence factors: temperature > weight ratio of ganoderma lucidum spore powder to water > microwave power > reaction time. And the optimal reaction condition was as the temperature 150 °C, weight ratio of ganoderma lucidum spore powder to water 1:40, microwave power 100 W and reaction time 105 min.

Acidic wastewater was treated by microwave irradiation Fenton’s reagent, the effect factors: initial concentration of wastewater, dosage of H2O2, microwave irradiation time, microwave power and pH on Acidic wastewater were investigated. The optimal conditions of operation are determined as follows: microwave power is 480W, microwave irradiation time is 5min, H2O2 is 2.0mL and FeSO4 is 0.07g, pH=1. Under these conditions, the COD removal rate is 90.15% for 50mL Acidic wastewater（be diluted ten times）.The result of wastewater treated by microwave irradiation Fenton’s reagent is obvious, and without secondary pollution to environment.

The foamed plastics are not bio-degradable and not readily recyclable. How to substitute new foamed buffer materials with lower pollution for foamed plastics became a popular research topic. The paper discussed the effects of microwave power, natural bonding agent, lubricating agent and crosslink agent on foamed buffer material with fibers of old newspaper and inorganic foaming agent. The result showed that increasing of microwave power could be beneficial to decrease the molded time and density of foamed buffer material with fibers of old newspaper. The best foamed properties were achieved with proper dosage of natural bonding agent like wheat flour, glyceryl monostearate sodium borate at the microwave power of 575W.

The removal of phenol from aqueous solution was evaluated by using microwave technique assisted with active carbon. The effective factors such as the concentration of phenol , active carbon dosage, microwave power and irradiation time on the removal rate were investigated. When the concentration of phenol was 150 mg/l, active carbon dosage was 6 g/l, microwave power was 500 W, and irradiation time was 8 min, the removal ratio of phenol reached 95. 03%. The research on kinetics suggested that the process of treatment accords to the first-order reaction.

The experiments are designed to study influence of different loading mass and microwave power on drying kidney beans. A conclusion is obtained that all the two factors significantly affect dehydration and power consumption. When the power level increased, the dehydration rate increased while the drying energy consumption decreased. The same water loss will consume more energy when the moisture content is less than about 300 (w%,d.b.). The sensory quality of the dried samples decreased with increase first-stage of power and second-stage power when the power was more than 1.6kW/kg and 1.0kW/kg.

Polysaccharide fromPanax japlcus var(PJVPs) was extracted with microwave-assisted (MAE). The effects of operating conditions, such as extraction time, ratio of water to raw material , and microwave power, on the extraction yield of PJVPs were studied through a Box-Behnken design (BBD). The optimum extraction conditions were as follows: extraction time 9.14 min, power 728.5 W and ratio of water to raw material 27.57ml/g. The yield of polysaccharide was 14.02 % based on the above mentioned conditions.

A cylindrical fluorescent lamp driven by a surface-wave sustained plasma (SWP) generator designed in our lab is researched. A technique to diagnose the SWP plasma column is introduced. Principal physical properties, ion density and electron temperature and the luminance of a fluorescent lamp were studied. Influence factors of luminance such as the microwave power, the gas pressure were studied. The radial distribution of luminance and ion density was also researched. The results show the SWP column is able to generate plasma of about 3ev electron temperature and 1017 m-3 ion density. It is found that the luminance at 200 mm above the base can be about 8000 cd/m2. The luminance changes with the microwave power and the pressure.

The purpose of this paper is to investigate the impact of vacuum microwave drying on the quality of okra. The curves of colour, fracture resistance, rehydration ratio and the content of vitaminC were obtained at various drying times, vacuum degrees and microwave powers. Results showed that an increase in drying time and microwave power resulted in serious colour change when compare the dry product to fresh okra. However, the higher the vacuum, the slighter the colour changed. The fracture resistance decreased and the brittleness was good when drying time was increased to high level of 14min and 16min. Increasing vacuum degree also made fracture resistance decreased; rehydration ratio increased with the time and microwave power increased, but decreased if the time exceeds 14min. The rehydration ratio of okra is also affected by the vacuum degree, increasing which led the rehydration ratio increased significantly at the beginning of drying and then slowly; the greater the drying time and microwave power, the more lost of vitaminC, however, higher vacuum degree was found to be beneficial to save the vitaminC.

Using microwave enhanced TiO2/AC photocatalyst to photocatalytic oxidation reactive gaudy red dye wastewater.Inspected the influence of the microwave irradiation time and microwave power on the preparation process, and comparative study the influencing treatment effect factors like the initial concentration of wastewater, photocatalyst using times and photocatalyst dosage.The results showed that:the irradiation time is 1min on 520W ,the photocatalyst activity is the highest . The initial concentration of wastewater is 50mg/L, 10.0g/L of dosage, the best decolorization rate is 95.6%, Compared to the no enhanced, the improvement for photocatalyst increased by 8.7%., indicating that the microwave enhanced TiO2/AC photocatalyst can effectively improve the treatment effect of dye wastewater.

Convectional dryerswork at high temperature and usually lead to loss of quality for sensitivebiomaterial products (especially in nutrition). In this way the researchersfound the microwave power more effective and suitable for drying processes. Someof microwave drying advantages include the following: short drying time, highquality of product, low operating temperature, flexibility in producing widerange of products and easier process controlling. The article calculated themoisture content and drying rate during drying process. Microwave power, holdertray speed, dimension of samples, irradiation time were considered; under theseconditions experiments were done and the results show that microwave method hasmore advantages as comparing with convectional methods.

A new technique for evaluating a microcalorimeter is presented in this paper. Its measurement principle is to change a thermistor mounts mismatch status by changing the reference resistance of its power meter bridge, measure a microcalorimeter in different mismatch status so that effective efficiency of the thermistor mount measured by the microcalorimeter can be used as the transfer value. This technique will shorten the measurement time and simplify the assembling procedure, while not reducing the evaluation accuracy. Its measurement principle and a experimental result are reported in this paper.

Pt/CeO2/multi-walled carbon nanotubes (Pt/CeO2/MWCNTs) catalysts have been synthesized by microwave-assisted polyol process at different microwave power values. The obtained samples have been characterized by physical examinations and electrochemical measurements. The effects of different microwave power on performance of Pt/CeO2/MWCNTs have been mainly investigated. The results of physical examinations show that Pt nanoparticles have a narrow size and Pt nanoparticles and CeO2 units are highly dispersed on the surface of MWCNTs. The results of electrochemical measurements present that Pt/CeO2/MWCNTs catalysts by microwave-assisSubscript textted polyol process have higher catalytic activity and stability than Pt/MWCNTs catalyst by the same procedure. When the value of microwave power is 70%, the Pt/CeO2/MWCNTs catalyst has the smallest particle size and exhibits the highest activity and stability of methanol electrooxidation.

Pinus massoniana pollen was hydrolyzed by using the method of orthogonal experiment in pure water under microwave irradiation. The main influence factors of pollen microwave hydrolysis reaction was confirmed as temperature, weight ratio of pollen to water, microwave power and the reaction time, and its effects on the pollen microwave hydrolysis reaction was studied in detail. The results showed that the sequence of influence factors was reaction temperature>weight ratio of pollen to water>microwave power>reaction time. The optimal reaction conditions was that the temperature, 120oC; the power, 120W; the reaction time, 150min; the weight ratio of pollen to water, 1:10.

The article is about extracting the yellow pigment from orange peel with the aid of microwave.It mainly studies the effect of concentration of ethanol,the ratio of material and solution,microwave time,microwave power on the extraction percent of yellow pigment .The Orthogonal experiment shows that the order of factors which influence the extraction rate are microwave time,microwave power and mass concentration of ethanol. The optimized process conditions are mass concentration of ethanol as 85%,the ratio of material and solution as 1:16g/mL,microwave time as 8 minutes,microwave power as 200W,the extraction percent of yellow pigment can be 8.59%.

To enhance enzymatic hydrolysis efficiency of the corn straw, a process microwave pretreatment of corn straw was optimized using response surface methodology (RSM). Estimated optimum parameters were as follows: water to corn straw ratio is 58:1, microwave power is 640w and processing time is 5 minutes. Under these conditions, a maximum enzyme hydrolysis ratio of corn straw (49.25%) after microwave pretreatment was reached.

Microwave strengthened Fenton process oxidation of organophosphorus pesticide wastewater was studied by microwave chemical technology. With the synergistic effect of microwave and Fenton, pesticide wastewater was treated by varying dosage of pH, n[FeSO4•7H2O]/n[H2O2], microwave power and microwave radiation time. Microwave strengthened Fenton process oxidation of organophosphorus pesticide wastewater could achieve good effect and the COD removal rate can be up to 82%.

Because of convenient and price cheap, microwave therapy is an effective method to treat leukemia now. However it is quite difficult to detect with nondestrctive method and control accurately the temperature inside the purifying material exposed to microwaves. If the temperature is lower, the luekimic cell can not be killed effectively. But if the temperature is too high, the normal and cancer cell should be killed together. In this paper, the influence factors on the temperature variation in suspensions exposed to microwaves were studied so as to the temperature can be controlled effectively. The results show that there are many factors influencing on the temperature change in suspensions exposed to microwaves, and among them the influence of microwaves power is the biggest. The surface temperature was measured by a temperature sensor, then the inside temperature can be calculated according to the difference between inside and outside liquids. Further, an automatic control system of microwave power was used to control the inside temperature in an appropriate range, at which the normal cells were protected and the cancer cell were killed effectively.

Diatomite was modified by microwave treatment to increase their utilization value, using modified diatomite to treat ammonia-nitrogen wastewater. The experiment indicated that adsorption process of modification of the modified time by microwaves and microwave power is the impact of ammonia adsorption of the main factors. Through modification experiments by raising the capacity of diatomite adsorption ammonia nitrogen, adsorption of ammonia nitrogen increase over one time. Langmuir and Freundlich isotherms were used to fit and the experimental results show that the modified diatomite adsorption onto ammonia nitrogen accords with Langmuir and Freundlich isotherm. The maximum theoretical adsorption capacities are 5.81083mg/g.

The microwave-induced hydrogen peroxide oxidation process was used for the treatment of synthetic imidacloprid pesticide wastewater, which the initial concentration of COD was 268mg/L. The results showed that COD removal rate could reach 50.06% with the following working conditions: imidacloprid pesticide wastewater 100mL, H2O2 concentration 26.52g/L, microwave power 119W, irradiation time 1min, pH value 6. It provides an effective technology for the removal of imidacloprid pesticide wastewater.

The effect of microwave-assisted NaOH solution to pretreat rice husk was studied with RSM (Response Surface Method). When NaOH concentration; microwave power; irradiation time and solid-to-liquid ratio, are 1.5%; 650 w; 16 min and 1:12 respectively, the rice husk which are treated under such conditions can be hydrolyzed by the enzyme to get 56.24% sugars.

Polysaccharide from Acanthopanax obouatus Hoo(AHPs) was extracted with microwave-assisted(MAE). The effects of operating conditions, such as extraction time, ratio of water to raw material , and microwave power, on the extraction yield of AHPs were studied through a Box-Behnken design (BBD). The optimum extraction conditions were as follows: extraction time 13.5min, power 796 W and ratio of water to raw material 16.5ml/g. The yield of polysaccharide was 5.18% based on the above mentioned conditions.

This paper describes the products characteristic derived from the conventional pyrolysis (CP) and microwave-assisted pyrolysis (MWP) of low metamorphic coal. GC/MS were used to analyze the volatile fractions of tar obtained by pyrolysis at different temperature and microwave power. It was found that microwave treatment produces more gas and oil than conventional pyrolysis at 800w and 800°C. In addition, the gas from the microwave has much higher syngas (H2+ CO) contents (up to 55 vol. %) than those obtained by conventional hydrolysis (up to 42 vol. %). The tar from the microwave is mainly composed of aromatic pyrolysis and phenolic compounds, and the content is 47.398% and 13.831% respectively as the microwave power is 800w. Meanwhile, the tar component content of C5-C10from microwave pyrolysis is up to 5 fold than conventional pyrolysis. By contrast, the microwave-assisted pyrolysis is beneficial to the tar conversion to light fraction.

This article uses three methods, and let the flowers in different conditions.The first,natural conditions are in the average temperature of 25 degrees in the dry environment press 4 days;The second is 40% microwave power press 120s; The last,constant temperature 55 C, 12h .The test is about 40 kinds of tropical flowers that are suppressed, and the use of sensory evaluation and color difference meter calculation and analysis, to find out a good material under a certain condition without protecting color, after drying can still maintain good color and shape. Develop the dried material resource, expand the natural industry market.

For more efficient and economical extraction of cochineal dye, combined microwave-ultrasonic wave extraction was applied. It was approached 4 factors as microwave power, treated time, materials-to-liquid ratio and ultrasonic wave power. Results showed that the optimal condition individually for cochineal dye extraction was at 400W microwave power, 17min treated time, 1:8 materials-to-liquid ratio and 600W ultrasonic wave power. On the basis of single factor test, RSM optimization of the extraction was achieved at 464W microwave power, 18.48min treated time, 1:8.23 materials-to-liquid ratio and 627W ultrasonic wave power. The verification was very approximate to the predicted value from the modelling regression equation. And the best extraction grade was tesified as 4 times.

Larch wood (larix) contains plenty of resin and a combined treatment with microwave irradiation and subsequently steaming is a strategy to remove the resins in the larch wood. In this study, the effects of microwave power (5.54, 12.92, and 24 kW) and steaming period (2, 4, 6, 8, 12, and 16 h) on surface color were investigated. After air-drying, L*（Lightness）, Ag*(Hue Angle), and ΔE*( color difference) values of control increased, however, redness（a*）, yellowness（b*） and Chroma（C*）values decreased. The color parameters of larch wood after microwave treatment and air-drying exhibited a same trend as the control, but the values were slightly larger than the absolute value of control. Simultaneous, L* and ΔE* values also increased but b* and C* values decreased. Most a* values decreased, Ag* values decreased or unchanged. Treatment with microwave-steaming followed with air-drying caused an increase in L* and ΔE*; however, b* and C* values decreased. Steaming for 8h and 12h at 12.92kW resulted in increased a* values but the other parameters decreased. For steaming The Ag* values did not exhibit any trend due to steaming.

Absorber-microwave material Al-Si alloy powder was used as interlayer to join the 95-Al2O3ceramics. The behaviors curves of time-temperature for Al-Si alloy interlayer and 95-Al2O3ceramics at different microwave power were researched. The interlayer morphology of the joints region was characterized by SEM and the element and phase components were analyzed by EDX and XRD. The results indicated that the loact heating around 95-Al2O3ceramics could be achieved by microwave sintering. The joint interfaces of Al-Si/95-Al2O3formed at microwave 2KW/20min→0KW and the joint mechanism of 95-Al2O3ceramics was transient liquid phase diffusion bond.

There are many ways to increase the combustion rate of pulverized coal. In this paper, it is improve pulverized coal combustion rate by the method of microwave modification. In order to study the mechanism of modification on pulverized coal, microstructure and chemical compositions of pulverized coal before and after modification were studied. The results show that the microwave modification only changes the nature of PC itself without change component in the lower microwave power condition. And with the modified time extension, the pore number of PC surface gradually increases and the specific surface area enlarges. The highest combustion rate of modified-coal is 85.4%, and it is increase 11.1% than the raw coal in the experiment condition.

A simple and rapid microwave assisted extraction (MAE) technique for the extraction of flavonoids from the leaves of Syringa oblatewas developed. The influence of several extraction variabes on extraction yield of flavonoids were discussed. The optimum extraction conditions obtained were: 50% ethanol solution, 480 W microwave power, 6 min extraction time and 20:1 (mL/g) as the ratio of solvent volume to sample weight. Compared with conventional extraction methods, MAE is an efficient and rapid method for the extraction of the flavonoids from the leaves of Syringa oblate.

Microwave heating was efficient and the regeneration time was shortened compared to conventional thermal heating. Experiments were conducted to demonstrate that spent zeolite can be regenerated for reuse by microwave irradiation. The spent zeolite tested was prepared from the aqueous solutions of methylene blue. The effects of microwave irradiation time, microwave power on the regeneration efficiency were presented. The results show that microwave irradiation time and microwave power played significant role on the regeneration efficiency. It was concluded that microwave irradiation may be effective method for dye-loaded zeolite reuse.

In this study, the drying behaviour of single layer apple slices of 5mm thickness in a microwave dryer was investigated experimentally for four different microwave power levels (90 W, 180 W, 360 W and 600 W) and suitability of drying models available in the literature in simulating the drying behaviour of apple slices was determined by statistical analysis. The performance of these models was determined by comparing the coefficients of determination (R), reduced chi-squares (χ2) and root mean square errors (RMSE) of the models. The results show that drying time and energy consumption decreases considerably with increasing microwave power. The results also show that, among of the models proposed, the Verma et al. model gives the best fit with experimental data for all drying conditions considered. In order to determine the colour change of apple, a colour meter was also used in this study and found that L* and a* values were not significantly different from the values of the fresh apples.

Technological process of microwave-assisted leaching of vanadium with sulfate solution has been defined on the base of phase and chemical constituents of stone coal. The influence factors such as content of sulfuric acid, microwave power, and leaching time were studied on leaching rate of vanadium from the stone coal. One element experiments and orthogonal design experiments are carried out to achieve optimized parameters. The experimental results showed that the leaching rate of vanadium was improved by the change of influence factors at some range. The single leaching rate of vanadium reached 80.9% under the optimal conditions of sulfuric acid content of 12%, microwave power 539w,leaching time of 2h.

In this paper, the feasibility of preparing activated carbon from corncob furfural residue with ZnCl2 by microwave irradiation was studied. The effect of the ratio by weight of ZnCl2 to corncob furfural residue, ZnCl2 solution soaking time, microwave irradiation time and the pH value of ZnCl2 solution on the quality of activated carbon was investigated. On the condition that the microwave power is 800 W and ZnCl2 solution mass concentration is 50%, the best technological parameter on preparing activated carbon with ZnCl2 by microwave irradiation is obtained: at the ratio of 3.5:1 by weight of ZnCl2 to corncob furfural residue, microwave irradiation time is 20 min, ZnCl2 solution soaking time is 12 h, the pH value of ZnCl2 solution is 2, the activated carbon yield reached 33.1% and the decolorizing capacity for methylene blue is 202.5 mg/g, the product is used in treating Cr6+ solution(pH value 4.0, concentration 50 mg/L), its adsorption capacity of Cr6+ is 7.583 mg/g.

With the development of highway transportation and automotive industry, there have been a large number of waste rubber and waste asphalt mixture. If they cannot be recycled in time, it will not only become a waste of resources, but also cause serious environmental pollution. For the comprehensive utilization of waste resources, the asphalt recycling agent is developed using waste rubber by microwave treatment in light components agents. The flexibility and consistency with aged asphalt of old rubber are all improved by adding appropriate light-component auxiliary agent and the treatment of microwave processing technology. According to high and low temperature performance and anti-aging properties of recycling asphalt, orthogonal tests are designed to determine the reasonable ratio of raw material and the conditions of technology by penetration, softening point, ductility and penetration ratio and ductility after rolling thin film oven test (RTFOT).Test results and analysis indicate that the optimum proportion are 40% of DOP, 40% of aromatic oil, 20% of rubber powder and 0.5% of the total of anti-aging agent. The optimum conditions are 900w of microwave power and 10min of the processing time. Studies show that 10% of the recycling agent can effectively supplement missing components and restore colloidal structure and rheological performance of aged asphalt.

Evaluated with the yield of litsea cubeba essential oil, water extraction technology of essential oil from the seed of Litsea Cubeba (Lour.) Pers. assisted by microwave and ultrasonic is studied for the first time in this paper. The optimal water extraction technology of litsea cubeba essential oil assisted by pure microwave is as follows: extracting time 40 minutes, microwave power 650 W, solid-liquid ratio 1:4 (g/mL). Average yield of litsea cubeba essential oil is up to 10.287% (g/g) under the above optimal technology. The optimal water extraction technology of litsea cubeba essential oil assisted by microwave together with ultrasonic is as follows: extracting time 8 minutes, microwave power 600 W, solid-liquid ratio 1:7 (g/mL), extracting temperature 85 . Average yield of litsea cubeba essential oil is up to 14.188% under the above optimal technology. Microwave and ultrasonic can effectively enhance the extraction process of litsea cubeba essential oil.

As a new processing method for the production of modified starch, microwave heating was applied to native arrowroot starch. The effect of processing parameter on the sustained release properties of the obtained modified starches was investigated. The modified starch was blended with a model drug, theophylline, and then compressed into tablet using hydraulic press at a pressure of 19.6 kN for 30 s. The physical properties as well as drug release behavior of the compressed tablets were investigated. The results showed that the physical properties of different modified starches were about the same. The modified arrowroot starch displayed better sustained release properties than native starch. The modified arrowroot starch, which subjected to microwave heating using high level of water content, long heating time and high microwave power, demonstrated promising properties as hydrophilic matrix excipients for sustained release tablets.

Based on the characters of expanding and layer adsorbing of vermiculite，industrial vermiculite samples from Weili Mine of Xinjiang Province were expanded by both chemical and microwave chemical methods. The influences to the exfoliation ratio of different parameters such as concentration of hydrogen peroxide, power of the microwave, heating time, ratio of solid-liquid, immersion time were discussed. And the expanded mechanism of vermiculite was also analyzed. The results indicate that the expanded times increase with the increasing of concentration of hydrogen peroxide, and the best expanding point appears when the concentration of hydrogen peroxide is 30%. The solid-liquid ratio of vermiculite and hydrogen peroxide has little effect on the expanding of vermiculite. The vermiculite samples could be expanded 8.5 times by heated 2 min under 800W microwave power after immersion for 12 h when the concentration of hydrogen peroxide is 30%. As a result, the vermiculite could be expanded because of the oxygen pressure produced by the decomposition of hydrogen peroxide into the vermiculite interlayer. When using the microwave chemical method, the pressure of both oxygen and interlayer water lead to the increases of the expanded times. And exfoliation vermiculite plays an important part in energy-saving and environmental treatment.