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This paper analyzes the physical principle of excellent treatment effect of fine particulate matter by Cloud-Air-Purifying technology, and predicts the application prospect and feasibility of Cloud-Air-Purifying technology in the field of radioactive aerosol purification from the perspective of principle and application effect based on laboratory research results and industrial application status・ Under the background of civil・military integration, Cloud-Air-Purifying technology coupled with efficient fixative to purify radioactive aerosols in nuclear facilities will be promising. [ABSTRACT FROM AUTHOR]

The GO/CMC composite absorbent was prepared by the solution・blen(ling method using graphene oxide (GO) and carboxymethyl chitosan (CMC) as raw materials and characterized by FTIR, Raman, SEM, TEM, and TG・DTG・ The results show that a large number of carboxyl and epoxy groups are present in GO/CMC and that GO and CMC are well compounded・ The performance of the absorption treatment of unsymmetrical dimethylhydrazine (UDMH) wastewater is influenced by the composition of the absorbent, the addition of oxidizing agents, and inorganic phase change materials. Absorbent absorption treatment is most effective when GO is added at 10% ・ The oxidizing agent Ca(C1O)2 can undergo a more violent redox reaction with UDMH. The reaction intensity is effectively mitigated by the doping of absorbents ・ When 0. 5 g of 10% GO/CMC and 2. 5 g of Ca(C1O)2 were added, the maximum concentration of volatilized UDMH gas was only 58. 69 mg/m3 ・ Furthermore, the addition of inorganic phase change materials further reduces the system temperature and the maximum concentration of volatile UDMH gas. The GO/CMC composite absorbent can provide a useful exploration for the emergency absorption treatment of high concentration UDMH wastewater. [ABSTRACT FROM AUTHOR]

Electro-catalytic oxidation method was used to degrade unsymmetrical dimethylhydrazine (UDMH), which is the main pollutant of propellant wastewater. A combined electrochemical system using Ti/PbO2 dimentionally stable anode (DSA) as anode and Pd coating steel with the same area as cathode achieves the degradation of UDMH. The UDMH removal rate was investigated under different experimental conditions. Using a 10 mg/L UDMH solution as the reaction system, titanium mesh-based PbO2 anode removed UDMH by 100% in 1 h, when current density is 1 mA/cm². The results also show that the removal rate is nearly 4 times higher than graphite felt electrode. Increasing the current density, adding chloride ions into the electrolysis cell, can strengthen the treatment capacity of this method, providing a new idea for the treatment of UDMH wastewater. [ABSTRACT FROM AUTHOR]

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Copyright of Journal of Materials Engineering / Cailiao Gongcheng is the property of Journal of Materials Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)