Highly efficient removal of perfluorooctanoic acid from aqueous solution by H2O2-enhanced electrocoagulation-electroflotation technique  

作　　者：Bo Yang Yanni Han Yunpan Deng Yingying Li Qiongfang Zhuo Jinhua Wu 

机构地区：[1]Department of Environmental Engineering,College of Chemistry and Environmental Engineering,Shenzhen University,Shenzhen 518060,PR China [2]South China Institute of Environmental Sciences,The Ministry of Environment Protection,Guangzhou 510655,PR China [3]School of Environment and Energy,South China University of Technology,Guangzhou 510006,PR China

出　　处：《Emerging Contaminants》2016年第1期49-55,共7页新兴污染物（英文）

基　　金：the National Natural Science Foundation of China(21547011,21177089,21307036);the National High-Tech Research and Development Program of China(863 Program,2013AA062705);the Guangdong Natural Science Foundation(2014A030313761);the Shenzhen Science and Technology Project for Fundamental Research(JCYJ20150324141711622,JCYJ20150529164656097).

摘　　要：Electrocoagulation(EC)technique was used to investigate the removal performance of aqueous perfluorooctanoic acid(PFOA)with relatively high concentration as simulating the wastewater from organic fluorine industry.A comparison was done with the similar amount of coagulant between EC and chemical coagulation process.PFOA removal obtained was higher with EC process,especially for Fe anode.Several factors were studied to optimize the EC process.At the optimal operating parameters including 37.5 mA/cm^2 of current density,initial pH 3.77,and 180 rpm of mixing speed,93%of PFOA could be removed with 100 mg/L of initial concentration after 90-min electrolysis.Furthermore,the remove efficiency could be obviously improved by H2O2 intermittent addition,which removed more than 99%of PFOA within 40-min EC.It could be attributed to that H2O2 facilitated the oxidative transformation from ferrous to ferric ion.In addition,the adsorptive removal of aqueous PFOA on Fe flocs during EC was also verified by fourier transform infrared spectra.

关 键 词：ELECTROCOAGULATION PFOA removal Fe electrode H2O2 addition 

分 类 号：X70[环境科学与工程—环境工程]