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Quantitative monitoring and potential mechanism of the secondary corrosion risk of PAH-contaminated soil remediated by persulfate oxidation.
Wang, Zhenxia; Song, Jiuhao; Yuan, Wenyi; Li, Yi; Wu, Naijin; Li, Xiang; Rong, Liming; Wang, Haijian; Zhang, Ji; Wei, Wenxia; Li, Peizhong.
Afiliación
  • Wang Z; Institute of Resource and Environment, Beijing Academy of Science and Technology, Beijing, China; School of Resources and Environmental Engineering, Shanghai Polytechnic University, Shanghai, China.
  • Song J; Institute of Resource and Environment, Beijing Academy of Science and Technology, Beijing, China; Beijing Key Lab of Industrial Land Contamination and Remediation, Beijing, China.
  • Yuan W; School of Resources and Environmental Engineering, Shanghai Polytechnic University, Shanghai, China.
  • Li Y; Institute of Resource and Environment, Beijing Academy of Science and Technology, Beijing, China; Beijing Key Lab of Industrial Land Contamination and Remediation, Beijing, China.
  • Wu N; Institute of Resource and Environment, Beijing Academy of Science and Technology, Beijing, China; Beijing Key Lab of Industrial Land Contamination and Remediation, Beijing, China. Electronic address: wujin310@126.com.
  • Li X; Institute of Resource and Environment, Beijing Academy of Science and Technology, Beijing, China; Beijing Key Lab of Industrial Land Contamination and Remediation, Beijing, China.
  • Rong L; Institute of Resource and Environment, Beijing Academy of Science and Technology, Beijing, China; Beijing Key Lab of Industrial Land Contamination and Remediation, Beijing, China.
  • Wang H; Institute of Resource and Environment, Beijing Academy of Science and Technology, Beijing, China; Beijing Key Lab of Industrial Land Contamination and Remediation, Beijing, China.
  • Zhang J; Institute of Resource and Environment, Beijing Academy of Science and Technology, Beijing, China; Beijing Key Lab of Industrial Land Contamination and Remediation, Beijing, China.
  • Wei W; Institute of Resource and Environment, Beijing Academy of Science and Technology, Beijing, China; Beijing Key Lab of Industrial Land Contamination and Remediation, Beijing, China.
  • Li P; Institute of Resource and Environment, Beijing Academy of Science and Technology, Beijing, China; Beijing Key Lab of Industrial Land Contamination and Remediation, Beijing, China. Electronic address: liepi_li@163.com.
J Environ Manage ; 325(Pt B): 116407, 2023 Jan 01.
Article en En | MEDLINE | ID: mdl-36302302
ABSTRACT
The proportion of activated persulfate (PS) oxidation technology in the remediation of domestic organic contaminated sites has increased every year, and the potential corrosion risk of site reuse caused by residual oxidants and by-products has also attracted the attention of researchers. In this work, the potential corrosion degree such as the mass reduction rate and surface crack width of standard iron flakes under different conditions, including with different PS dosages and release times, was monitored quantitatively over a long period, and the corresponding corrosion risk was quantitatively assessed. The results showed that when n (Na2S2O8)n (PAHs) increased from 51 to 1001, the higher the oxidizer dosage, the more severe the corrosion weight loss and surface crack width, indicating that the oxidizer dosage was positively correlated with the potential corrosion risk. In addition, the corrosion crack width of the standard iron flake had a significant positive correlation with the reaction time and a significant negative correlation with the mass change. According to the changes in the standard iron flake, the corrosion process could be divided into three stages, in which the corrosion risk from high to low followed the order of oxidant corrosion stage > oxidant and salt corrosion stage > salt and microbial corrosion stage. Therefore, the dosage of chemicals should be controlled, the molar ratio of oxidizer to contaminant should not exceed 251, and a natural recovery period of at least one year should be left post remediation. During the reuse of the remediation sites in the future, the potential corrosion risks should also be calculated based on the dosage and time, to avoid redevelopment and use of the restoration site in the high corrosion risk stage.
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Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Contaminantes del Suelo / Restauración y Remediación Ambiental Idioma: En Año: 2023 Tipo del documento: Article

Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Contaminantes del Suelo / Restauración y Remediación Ambiental Idioma: En Año: 2023 Tipo del documento: Article