文献类型：期刊文献

英文题名：Simultaneous Stabilization of Cu/Ni/Pb/As Contaminated Soil by a ZVI-BFS-CaO Composite System

作者：Luo, Runlai[1];Zhao, Nan[2,3];Jia, Zhengmiao[1,2];Wu, Sihan[2];Chen, Xing[2,4];Li, Zhongyuan[2];Ju, Feng[4];Luo, Yongming[3];Li, Hui[1]

机构：[1]Shanghai Univ, Inst Environm Pollut & Hlth, Sch Environm & Chem Engn, Shanghai 200444, Peoples R China;[2]China Construct Eighth Engn Div Co Ltd, Shanghai 200131, Peoples R China;[3]Chinese Acad Sci, Inst Soil Sci, CAS Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Peoples R China;[4]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2025

卷号：18

期号：1

外文期刊名：SUSTAINABILITY

收录：;WOS:【SSCI(收录号:WOS:001658644000001)，SCI-EXPANDED(收录号:WOS:001658644000001)】；

基金：This study was supported by Shanghai Rising Star Nurturing Program (24YF2750900), CNPC Innovation Found (2022DQ02-0504) and CSCEC-8B Technology R&D Project (2023-4-08). It was also sponsored by the Soil Remediation Technology and Equipment of Eco-Environmental Engineering Research Center (CSCEC-PT-009).

语种：英文

外文关键词：co-contaminated soil; composite stabilizing agent; heavy metals; synergistic stabilization; long-term effectiveness

摘要：The simultaneous stabilization of Cu, Ni, Pb, and As in sustainable environmental development remains a significant challenge in heavy metal remediation. In this paper, liquid phase equilibrium experiments have evaluated the immobilization efficiency of 20 potential stabilization materials. Soil stabilization experiments, material characterization, and long-term effectiveness assessments have been performed to investigate the efficient composite stabilization agent and its underlying mechanisms. Results demonstrate that seven materials, including calcium oxide (CaO) and hydroxyapatite (HAP), exhibit multi-metal immobilization capabilities. Among single-material stabilization in soil, HAP for Pb, zero-valent iron (ZVI) for As, and blast furnace slag (BFS) for Cu exhibit prominent stabilization efficiency, yet they cannot efficiently stabilize the four heavy metals simultaneously. Subsequently, the ZVI:BFS:CaO composite agent (6:3:1 mass ratio, 10% addition rate) has been proposed by formulation optimization, achieving remarkable stabilization rates: 99.92% for Cu, 96.16% for Ni, 92.06% for Pb, and 99.58% for As. XRD, XPS, and SEM-EDS analyses confirm that the stabilization occurs through synergistic mechanisms including precipitation, complexation, and lattice encapsulation. The composite stabilizing agent withstood 15 wet-dry and 150 freeze-thaw cycles, with four types of heavy metals stabilization rates > 60%, confirming its long-term effectiveness.