Preparation of wrapped nZVI particles and their application for the degradation of trichloroethylene (TCE) in aqueous solution

Journal of Water Reuse and Desalination

Fan, Xiaofeng¹  Deng, Yaqian¹  Cheng, Yue¹  Yu, Shuzhen¹  Fan, Wenjing¹ 

[1] School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, Jiangxi Province, China

关键词: agar-nZVI;    CMC-nZVI;    dechlorination;    reaction kinetics;    starch-nZVI;    TCE;    W-nZVI;   

DOI  :  10.2166/wrd.2015.082

学科分类：工程和技术（综合）

来源: IWA Publishing

【 摘 要 】

Three types of wrappped nanoscale zero-valent iron (W-nZVI) with different coatings including agar, starch, and carboxyl methyl cellulose, were synthesized using a rheological phase reaction method. The structure and morphology of W-nZVI particles were characterized by scanning electron microscopy and transmission electron microscopy. Batch degradation experiments exhibited that W-nZVI dosage, initial trichloroethylene (TCE) concentration and solution pH had significant effects on TCE dechlorination. Experimental results proved that the highest dechlorination efficiency was obtained within 320 minutes for 10 mg/L of TCE at the optimal pH of 5.0 and W-nZVI dosage of 0.5 g/L. Kinetic study revealed that TCE dechlorination by W-nZVI in aqueous solution obeyed the quasi-first-order reaction kinetics. The product after the reaction could be easily separated by the permanent magnet for re-use.

【 授权许可】

CC BY-NC-ND