层状双氢氧化物
赤泥
环境修复
土壤污染
环境化学
环境科学
废水
污染
废物管理
核化学
化学
冶金
环境工程
材料科学
生态学
土壤科学
无机化学
土壤水分
氢氧化物
生物
工程类
作者
Ao Chai,Senxu Ding,Jiang Yu,Siwei Deng,Jie Yu,Weiwei Zhu,Longyu Liu,Donghai Wu,Yuerong Wu
摘要
Abstract Soils contaminated with multiple heavy metals pose a significant threat to human health and ecosystem functionality. Following a “treat pollution with waste” strategy, we synthesized Mg‐Fe‐Al ternary layered double hydroxides (LDHs) from waste Bayer red mud for the remediation of heavy metal contaminated soils. Characterization using XRD, FTIR, SEM and EDS methods revealed a characteristic layered structure rich in functional groups, offering reaction sites for heavy metal passivation. Passivation experiments showed that the application of Mg‐Fe‐Al LDHs (2.5 wt.%) reduced the availability of Pb (29.7%), Cd (64.1%) and Cu (66.0%) in contaminated soil from a sulphide iron ore area in southern Sichuan Province. Simulated acid rain experiments showed leachate concentrations of Pb, Cd, and Cu reduced by 43.3%, 72.7% and 42.4%, respectively. This work provides a reference for the development of high‐performance and environmentally friendly adsorption‐stabilizing materials for green remediation.
科研通智能强力驱动
Strongly Powered by AbleSci AI