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Role of biochar-mineral composite amendment on the immobilization of heavy metals for Brassica chinensis from naturally contaminated soil

文献类型： 外文期刊

作者： Wang, Yu-Ying 1 ; You, Ling-Cong 1 ; Lyu, Hao-Hao 1 ; Liu, Yu-Xue 1 ; He, Li-Li 1 ; Hu, Yu-Di 1 ; Luo, Fan-Chen 5 ; Yang, Sheng-Mao 1 ;

作者机构： 1.Zhejiang Acad Agr Sci, Inst Environm Resource Soil & Fertilizer, Hangzhou 310021, Peoples R China

2.Engn Res Ctr Biochar Zhejiang Prov, Hangzhou 310021, Peoples R China

3.Zhejiang Univ Technol, Coll Environm Sci, Hangzhou 310014, Peoples R China

4.Zhejiang A&F Univ, Coll Agr & Food Sci, Linan 311300, Peoples R China

5.Zhejiang Inst Mech & Elect Engn, Hangzhou, Peoples R China

关键词： Biochar-mineral composite; Attapulgite; Kaoline; Vermiculite; Immobilization

期刊名称：ENVIRONMENTAL TECHNOLOGY & INNOVATION （ 影响因子：7.758； 五年影响因子：7.375 ）

ISSN： 2352-1864

年卷期： 2022 年 28 卷

页码：

收录情况： SCI

摘要： Heavy metals are prevalent in the environment and can cause disease in humans via the soil-plant-food chain. However, singular soil remediation techniques, such as pristine biochar, are susceptible to instabilities and low efficiency. Here, biochar-mineral (kaolin/vermiculite/attapulgite) composites were fabricated and characterized. A pot culture was carried out to certify the efficacy of the biochar-mineral composites to immobilize naturally heavy metals contaminated soils and reduce the bioavailability of heavy metals to plants. The results confirmed that biochar-mineral composites significantly impact the available K, available P, total N, and organic matter content of soil, which improved Brassica chinensis growth. Furthermore, the heavy metals' phytoavailability in naturally polluted soil and the accumulation in B. chinensis were reduced significantly. Biochar-attapulgite composite addition, especially at the 2% application rate, significantly enhanced heavy metal immobilization and had the highest efficacy. These findings demonstrated that biochar-mineral composites could be applied in naturally contaminated soil as effective and eco-friendly heavy metals passivators. (c) 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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