Anionic surfactant-activated remediation of Pb, Cd, As contaminated soil by electrochemical technology.

Autor: Zhang P; School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Central South University, Changsha 410083, China., Li P; School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Central South University, Changsha 410083, China., Ping Y; Power China Eco-Environmental Group Co., LTD., Shenzhen 518102, China., Xu H; Power China Eco-Environmental Group Co., LTD., Shenzhen 518102, China., Zhang Z; Power China Eco-Environmental Group Co., LTD., Shenzhen 518102, China., Zhao F; School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Central South University, Changsha 410083, China., Zeng G; School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Central South University, Changsha 410083, China., Huang P; School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Central South University, Changsha 410083, China., Yang Z; School of Metallurgy and Environment, Central South University, Changsha 410083, China; Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Central South University, Changsha 410083, China. Electronic address: yangzh@csu.edu.cn.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2024 Nov 20; Vol. 952, pp. 175889. Date of Electronic Publication: 2024 Aug 29.
DOI: 10.1016/j.scitotenv.2024.175889
Abstrakt: Lead (Pb), cadmium (Cd) and arsenic (As) contamination in soils show a growing environmental concern. However, owing to the significant differences in chemical characteristics, remediating heavy metal(loid)s of Pb, Cd and As is challenging. Herein, anionic surfactant-activated electrochemical approach was proposed to realize efficient immobilization of As, Cd and Pb heavy metal(loid)s from contaminated soils. In this innovative method, calcium lignosulfonate (CL) as anionic surfactant was used to activate Cd and Pb from contaminated soils into solution, afterwards anodically generated Fe (II) ions by the electrochemical process react with Pb and Cd to form precipitates. Meanwhile, owing to the strong binding capacities of Fe (II) ions, As contaminations were remediated. Moreover, via various characterizations and cyclic voltammetric method, the reaction kinetics and phase transformation process during the electrochemical process were analyzed in detail. These findings show great potential in optimizing the design of electrochemical treatment, which will be applied in remediating multi-component heavy metal(loid) polluted soils.
Competing Interests: Declaration of competing interest The authors declared that they have no conflicts of interest to this work. We declare that we do not have any commercial or associative interest that represents a conflict of interest in connection with the work submitted.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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