Nanomaterials in biochar: Review of their effectiveness in remediating heavy metal-contaminated soils

文献类型： 外文期刊

第一作者： Mazarji, Mahmoud

作者： Mazarji, Mahmoud;Minkina, Tatiana;Sushkova, Svetlana;Mandzhieva, Saglara;Bauer, Tatiana, V;Soldatov, Alexander;Wong, Ming Hung;Mazarji, Mahmoud;Bayero, Muhammad Tukur;Sillanpaa, Mika;Sillanpaa, Mika;Sillanpaa, Mika;Sillanpaa, Mika;Wong, Ming Hung

作者机构：

关键词： Remediation techniques; Nanomaterials; Heavy metal contaminations; Immobilization; Biochar

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：9.8； 五年影响因子：9.6 ）

ISSN： 0048-9697

年卷期： 2023 年 880 卷

页码：

收录情况： SCI

摘要： Biochar can be used for soil remediation in environmentally beneficial manner, especially when combined with nanomaterials. After a decade of research, still, no comprehensive review was conducted on the effectiveness of biocharbased nanocomposites in controlling heavy metal immobilization at soil interfaces. In this paper, the recent progress in immobilizing heavy metals using biochar-based nanocomposite materials were reviewed and compared their efficacy against that of biochar alone. In details, an overview of results on the immobilization of Pb, Cd, Cu, Zn, Cr, and As was presented by different nanocomposites made by various biochars derived from kenaf bar, green tea, residual bark, cornstalk, wheat straw, sawdust, palm fiber, and bagasse. Biochar nanocomposite was found to be most effective when combined with metallic nanoparticles (Fe3O4 and FeS) and carbonaceous nanomaterials (graphene oxide and chitosan). This study also devoted special consideration to different remediation mechanisms by which the nanomaterials affect the effectiveness of the immobilization process. The effects of nanocomposites on soil characteristics related to pollution migration, phytotoxicity, and soil microbial composition were assessed. A future perspective on nanocomposites' use in contaminated soils was presented.

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