文献类型：期刊文献

英文题名：Influences of Natural Condition Changes on the Simultaneous Immobilization of Arsenic, Lead, and Cadmium in Soil by Magnesium-Aluminum Modified Biochar

作者：Zhang, Wei[1,2]; Li, Qiannan[1]; Liang, Weiyu[1]; Wang, Gehui[1]; Wan, Jiang[1]; Song, Huihui[1]; Peng, Cheng[1,2]

机构：[1] State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220276618)

语种：英文

外文关键词：Aluminum - Cadmium - Efficiency - Freezing - Magnesium - Oxalic acid - Rain - Soils - Thawing

摘要：Magnesium-aluminum modified biochar (MABs) has an outstanding effect on the simultaneous immobilization on arsenic (As), lead (Pb), and cadmium (Cd) in soil, but the stability of remediation effect of MAB under various natural conditions is still unknown. In this study, we investigated the effects of organic aids, dry-wet cycles (DW), freeze-thaw cycles (FT), and rainfall (pH 4, 7, and 8) on the immobilization of As, Pb and Cd by MAB. Oxalic acid decreased the immobilization efficiencies of As, Pb and Cd by 15.5-38.5%.; meanwhile, humic acid reduced the immobilization efficiency of Pb by 89.7%, but elevated that of Cd by 19.5%. Compared with the 7 th round, the immobilization efficiencies of As, Pb, and Cd by MAB in 28 th round decreased by 17-28% in DW, but increased by 11-18% in FT. In addition, MAB was transformed into hydrotalcite after FT and DW. After experiencing simulated rainfall, MAB caused more As, Pb, and Cd retained in the upper soil layer. The study provides more theoretical basis for the application of MAB in the actual site remediation. ? 2022, The Authors. All rights reserved.