KMS Chongqing Institute of Green and Intelligent Technology, CAS
Electrokinetic-Fenton remediation of organochlorine pesticides from historically polluted soil | |
Ni, Maofei1,2; Tian, Shulei3; Huang, Qifei3; Yang, Yanmei4 | |
2018-04-01 | |
摘要 | Soil contamination by persistent organic pollutants (POPs) poses a great threat to historically polluted soil worldwide. In this study, soils were characterized, and organochlorine pesticides contained in the soils were identified and quantified. Individual electrokinetic (IE), EK-Fenton-coupled technologies (EF), and enhanced EK-Fenton treatment (E-1, E-2, and E-3) were applied to remediate soils contaminated with hexachloro-cyclohexane soprocide (HCH) and dichloro-diphenyl-trichloroethane (DDT). Variation of pH, electrical conductivity, and electroosmotic flow was evaluated during the EK-Fenton process. The IE treatment showed low removal efficiency for HCHs (30.5%) and DDTs (25.9%). In the EF treatment, the highest removal level (60.9%) was obtained for alpha-HCH, whereas P,P-DDT was the lowest (40.0%). Low solubility of pollutants impeded the HCH and DDT removal. After enhanced EK-Fenton treatment, final removal of pollutants decreased as follows: beta-HCH (82.6%) > gamma-HCH (81.6%) > alpha-HCH (81.2%) > delta-HCH (80.0%) > P,P-DDD (73.8%) > P,P-DDE (73.1%) > P,P-DDT (72.6%) > O,P-DDT (71.5%). The results demonstrate that EK-Fenton is a promising technology for POP removal in historically polluted soil. |
关键词 | Electrokinetic-fenton Pops Soil Remediation Real Polluted Soil |
DOI | 10.1007/s11356-018-1479-3 |
发表期刊 | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH |
ISSN | 0944-1344 |
卷号 | 25期号:12页码:12159-12168 |
收录类别 | SCI |
WOS记录号 | WOS:000431790000089 |
语种 | 英语 |