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Start Over Author "Li, Miao" Journal advanced materials research
35 results on '"Li, Miao"'

1. 4-tert-Octylphenol Biodegradation Performance by Acinetobacter Strain Immobilized in Calcium Alginate

Author

Cui Li Jin, Li Miao, Xiao Jian Zhou, Kun Ming Dong, Yang Liu, Wei Jiang, and Wei Yang Bao

Subjects
Materials science, Calcium alginate, Chromatography, Strain (chemistry), biology, General Engineering, Artificial seawater, Biodegradation, 4-tert-octylphenol, Acinetobacter, biology.organism_classification, chemistry.chemical_compound, Wastewater, chemistry, Degradation (geology)
Abstract

The 4-t-octylphenol (4-t-OP) biodegradation by alginate immobilized cells of Acinetobacter sp. was compared with its respective free cells in different media. The effects of different bead densities, pH values and practical applications of artificial seawater and wastewater on the biodegradation rate of 4-t-OP were investigated. Degradation kinetics of 4-t-OP by free and immobilized cells was well fitted with first order kinetic. The immobilized Acinetobacter sp. cells could enhance the efficiency of 4-t-OP degradation. The degradation rate and 4-t-OP half-life were 97.6% and 0.7 d, respectively. Increasing level of bead amount could also improve the degradation effects, when 400 beads per 100 mL were added, the degradation rate and 4-t-OP half-life were 96.5 % and 0.2 d respectively. The immobilized Acinetobacter sp. cells could degrade 4-t-OP both in artificial seawater and wastewater. The degradation rates were 87.7% and 84.3%, respectively, indicating its potential application of removing and biodegrading 4-t-OP under practical environment.

Published
2012

2. Non-Aqueous Dyeing of Reactive Dyes in D5

Author

Shen Zheng Li, Hua Li Miao, and Jin Qiang Liu

Subjects
chemistry.chemical_classification, Hydrolysis, Aqueous solution, chemistry, General Engineering, Organic chemistry, Salt (chemistry), Dyeing, Alkali metal, Nuclear chemistry
Abstract

C.I. Reactive Red 195 was used for non-aqueous dyeing in D5 (Decamethyl Cyclopentasiloxane) and appropriate surfactants were selected to ensure the dyes dispersed stably in D5 medium. The feasible method for reactive dyeing in dyes/D5 suspension system was established through repeated experiments. At the same time, taking the color depth (K/S value) as the evaluation index, the process factors in dyeing such as temperature, dyeing duration, pick-up ratio of alkali solution on fabric, as well as the alkali concentration were optimized for setting up dyeing conditions. The results showed that, the dye up-take could reach nearly 100% without any salt as accelerating agent. Since just a little water was used in the process, hydrolysis of reactive dyes was restrained, fixing rate was increased, and the apparent color depth of the dyed sample was much better than traditional water bath dyeing. The washing fastness and rubbing fastness of samples dyed in dyes/D5 system were satisfactory.

Published
2012

3. Effect of Spinning Conditions on the Morphology of Polyacrylonitrile Hollow Fiber Membranes

Author

Xiao Guang Zhang, Zhan Li Miao, and Jing Li

Subjects
Cross section (physics), chemistry.chemical_compound, Membrane, Morphology (linguistics), Materials science, chemistry, Aperture, Hollow fiber membrane, General Engineering, Polyacrylonitrile, Fiber, Composite material, Spinning
Abstract

In this paper dry-wet spinning technique was used during the preparation of dialysis hollow fiber membranes, three-component solution polyacrylonitrile(PAN)/dimethylformamide (DMF)/Water was chosen as the basic materials. The macro and micro-morphology of the hollow fibers were observed by microscopy and SEM. The influence of some important spinning parameters such as spinning pressure, inner pressure and spinneret aperture was investigated. The appearance of some big bores in the outer surface and multilayer structure in the cross section of the hollow fibers was discussed based on phase transition theory. The results show that the spinneret dimension is the key factor that determines the macrostructure of the membrane, the bigger the spinneret aperture the bigger the fiber size; the inner, outer membrane diameters and wall thickness increase with the spinning pressure; the inner, outer membrane diameters increase and the wall thickness decreases with the inner pressure; Concentric spinneret with proper aperture must be used to obtain satisfactory fibers.

Published
2011

35. Study on Treatment of Acid Scarlet GR Wastewater by Coupling System of K2FeO4 –PAFC

Author

Li, Ya Feng, Li, Miao, and Xu, Yue

Abstract

Using Ferrate (K2FeO4) and polymer flocculant PAFC (PAFC) Collaborative approach, deal with the Acid Scarlet GR Wastewater. Study the effect of Ferrate dosage, PAFC dosage, Ferrate dosing time, Wastewater initial pH Value. Results show that Ferrate pre-oxidation can significantly improve the Coagulation for the removal of Acid Scarlet GR. when the initial concentration of Acid Scarlet GR is 25mg/L, Ferrate dosage is 90mg,PAFC dosage is 13mL,the removal of Acid Scarlet GR is 95.67%.pH on Ferrate removal of Acid Scarlet GR wastewater has little effect. When pH value is 4-8, the removal rate can reach more than 92%.When pH value is 5.6,the removal rate is the highest.

Published
2011
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