Fabrication of CNFM and its application in soil remediation of heavy metals coupled with electrokinetic technology
SHAN Wen-pan1, HUANG Man-hong1,2, LI Xiao-chun1, ZHANG Cui-cui1, BI Lei1, MENG Li-jun1
1. College of Environmental Science and Engineering, Dong hua University, Shanghai 201620, China;
2. State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Dong hua University, Shanghai 201620, China
Chitosan nano-fiber membrane was fabricated by electrospinning under optimized parameters and the prepared nano-fiber membrane coupled with electrokinetics (EK) were used to remediate soils contaminated by heavy metals (Cu and Cr). Results showed that the optimum parameters for fabricating membrane were as follows: weight ratio of chitosan/polyvinyl alcohol was 20/80, acetic acid concentration was 20% and the mixed solution concentration was 8%. The average diameter of the prepared nano fiber membrane was 37.11nm and the adsorption equilibrium of CS /PVA for metal ions was 4h．Soil remediation for heavy metals efficiency of single electrokinetic process was low, reached only 34.9% and 11.7%. The efficiency was greatly improved by the coupling process of EK and nano-fiber membrane and metal removal efficiency by the coupling process attained 82% and 91%, respectively.
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SHAN Wen-pan, HUANG Man-hong, LI Xiao-chun, ZHANG Cui-cui, BI Lei, MENG Li-jun. Fabrication of CNFM and its application in soil remediation of heavy metals coupled with electrokinetic technology. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(9): 2722-2729.
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