农业环境科学学报2025，Vol.44Issue(10)：2676-2684,9.DOI:10.11654/jaes.2024-0871
改性粉煤灰用于水体和土壤重金属污染修复研究
Research on the remediation of heavy metal-contaminated water and soil by modified fly ash
毛晓宇 1常星岚 1李进军 2王润得 1顾雅洁 1孙科 1奚爽 1许嘉雨1
作者信息
- 1. 浙江浙能科技环保集团股份有限公司,杭州 311199
- 2. 武汉大学资源与环境科学学院,武汉 430079
- 折叠
摘要
Abstract
Heavy metal contamination is one of the major water and soil environmental problems,and this study aimed to develop adsorbents and passivators from fly ash for the remediation of heavy metal pollution in water and soil.The material preparation methods included successive treatment of fly ash with acid and base to prepare so-called acid-base-treated fly ash,treatment of fly ash with base to prepare so-called base-treated fly ash,and preparation of reconstructed fly ash by extracting Al,Fe,and Si species from fly ash followed by condensation reaction.Modified fly ash had significantly enhanced porosity and more active sites.The adsorptive removal efficiency of Cd in water and the passivation efficiency of Cd in soil were significantly improved by acid-base-treated fly ash and base-treated one compared with the pristine fly ash.In the passivation remediation incubation experiment of Cd-contaminated soil,base-treated fly ash achieved a decrease of about 24％in the fraction of exchangeable Cd in soil within 7 days.In contrast,reconstructed fly ash had the characteristics of a solid acid,which led to a decrease in the pH of the soil and an inverse increase in the fraction of exchangeable Cd by about 23％.The use of fly ash for pollution remediation after a low-cost treatment holds promise for its mass consumption and resourcing.关键词
土壤污染修复/粉煤灰/固体废弃物/重金属/钝化剂Key words
remediation of contaminated soil/fly ash/solid waste/heavy metal/passivator分类
化学工程引用本文复制引用
毛晓宇,常星岚,李进军,王润得,顾雅洁,孙科,奚爽,许嘉雨..改性粉煤灰用于水体和土壤重金属污染修复研究[J].农业环境科学学报,2025,44(10):2676-2684,9.
