Iron-modified biochar effectively mitigates arsenic-cadmium pollution in paddy fields: A meta-analysis

文献类型： 外文期刊

第一作者： Wei, Beilei

作者： Wei, Beilei;Zhang, Dongliang;Sun, Keke;Wei, Ying;Zhang, Xiaoqi;Ling, Huarong;He, Shijie;Wu, Hanqian;Wang, Ziting;Jeyakumar, Paramsothy;Trakal, Lukas;Wang, Hailong;Wang, Hailong;Huang, Zhigang;Li, Chong

作者机构：

关键词： Arsenic; Cadmium; Biochar; Iron plaque; Meta-analysis

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：13.6； 五年影响因子：12.7 ）

ISSN： 0304-3894

年卷期： 2024 年 469 卷

页码：

收录情况： SCI

摘要： The escalating problem of compound arsenic (As) and cadmium (Cd) contamination in agricultural soils necessitates the urgency for effective remediation strategies. This is compounded by the opposing geochemical behaviors of As and Cd in soil, and the efficacy of biochar treatment remains unclear. This pioneering study integrated 3780 observation pairs referred from 92 peer-reviewed articles to investigate the impact of ironmodified biochar on As and Cd responses across diverse soil environments. Regarding the treatments, 1) biochar significantly decreased the exchangeable and acid-soluble fraction of As (AsF1, 20.9%) and Cd (CdF1, 24.0%) in paddy fields; 2) iron-modified biochar significantly decreased AsF1 (32.0%) and CdF1 (27.4%); 3) iron-modified biochar in paddy fields contributed to the morphological changes in As and Cd, mainly characterized by a decrease in AsF1 (36.5%) and CdF1 (36.3%) and an increase in the reducible fraction of As (19.7%) and Cd (39.2%); and 4) iron-modified biochar in paddy fields increased As (43.1%) and Cd (53.7%) concentrations in the iron plaque on root surfaces. We conclude that iron-modified biochar treatment of paddy fields is promising in remediating As and Cd contamination by promoting the formation of iron plaque.

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