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8552822 
Journal Article 
电阻加热条件优化及其对污染土壤中苯并(a)芘的去除 
Tian, Y; Yang, Y; Han, Z; Hu, J; Jiao, W 
2019 
Huanjing Gongcheng Xuebao / Chinese Journal of Environmental Engineering
ISSN: 1673-9108 
Science Press 
13 
10 
2336-2346 
Chinese 
Electrical resistance heating (ERH) is one of the most potential technologies for the remediation of volatile and semi-volatile organic pollutants contaminated soils. In this study, ERH and TCH (thermal conductive heating) laboratory-scale devices were applied to explore the optimum conditions of ERH, evaluate BaP removal efficiency from contaminated soil, and investigate the thermal desorption reaction kinetics of BaP during the process of ERH and TCH disposals. The results indicated that the heating rate and maximum heating temperature in soil ERH process was significantly affected by soil moisture, salinity and electrical strength. The optimal conditions of ERH laboratory-scale devices was as follows. The electric strength of 8 V•cm-1, the addition of 6 mL 0.1% NaCl solution, the addition of 6 mL water every 30 min, the final BaP removal efficiency was 51.56%. The changes of temperature and electric current changes were synchronous during the process of ERH, and the soil moisture and temperature duration were significant factors affecting the BaP removal efficiency. The kinetics of tested BaP desorption were well fitted by parabolic diffusion, indicating that BaP removal from soil was dominated by micro-pore diffusion, which was greatly affected by the heating time. The results of this study can provide theoretical basis and data support for ERH application on BaP contaminated soil remediation. © 2019, Science Press. All right reserved. 
Benzo(a)pyrene; Electrical resistance heating; Soil remediation; Thermal desorption