Effective remediation of organic-metal co-contaminated soil by enhanced electrokinetic-bioremediation process  

作　　者：Fu Chen Qi Zhang Jing Ma Qianlin Zhu Yifei Wang Huagen Liang 

机构地区：[1]Low Carbon Energy Institute,China University of Mining and Technology,Xuzhou 221008,China [2]School of Environmental Science and Spatial Informatics,China University of Mining and Technology,Xuzhou 221008,China [3]School of Public Policy and Management,China University of Mining and Technology,Xuzhou 221116,China

出　　处：《Frontiers of Environmental Science & Engineering》2021年第6期221-230,共10页环境科学与工程前沿（英文）

基　　金：supported by the National Natural Science Foundation of China(Nos.51974313 and 41907405);the Natural Science Foundation of Jiangsu Province(BK20180641)。

摘　　要：This work investigates the influence of electrokinetic-bioremediation(EK-BIO)on remediating soil polluted by persistent organic pollutants(POPs)and heavy metals(mainly Cu,Pb and Ni),originated from electronic waste recycling activity.The results demonstrate that most of POPs and metals were removed from the soil.More than 60%of metals and 90%of POPs in the soil were removed after a 30-day EK-BIO remediation assisted by citrate.A citrate sodium concentration of 0.02 g/L was deemed to be suitable because higher citrate did not significantly improve treatment performance whereas increasing dosage consumption.Citrate increased soil electrical current and electroosmotic flow.After remediation,metal residues mainly existed in stable and low-toxic states,which could effectively lower the potential hazard of toxic metals to the surrounding environment and organisms.EK-BIO treatment influenced soil microbial counts,dehydrogenase activity and community structure.

关 键 词：ELECTROKINETIC CO-CONTAMINATION DEBROMINATION 

分 类 号：X53[环境科学与工程—环境工程]