Mechanisms for synergistically enhancing cadmium remediation performance of biochar: Silicon activation and functional group effects

文献类型： 外文期刊

第一作者： Li, Anyu

作者： Li, Anyu;Lu, Tao;Zhang, Yutong;Deng, Shengjun;Duan, Xianjie;Qiu, Guohong;Qiu, Guohong;Qiu, Guohong

作者机构：

关键词： Silicon -rich biochar; Silicon forms; Heavy metal removal; Adsorption contributions; Active group introduction

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.0； 五年影响因子：9.5 ）

ISSN： 0960-8524

年卷期： 2024 年 404 卷

页码：

收录情况： SCI

摘要： This work proposes an advanced biochar material (13-CD@SiBC) for controllable transformation of specific silicon (Si) forms through endogenous Si activation and functional group introduction for efficient cadmium (Cd) immobilization and removal. The maximum adsorption capacity of 13-CD@SiBC for Cd(II) reached 137.6 mg g-1 with a remarkable removal efficiency of 99 % for 200 mg L-1Cd(II). Moreover, the developed 13-CD@SiBC flow column exhibited excellent performance at the environmental Cd concentration, with the final concentration meeting the environmental standard for surface water quality (0.05 mg L-1). The remediation mechanism of 13-CD@SiBC could be mainly attributed to mineral precipitation and ion exchange, which accounted for 42 % and 29 % of the remediation effect, respectively, while functional group introduction enhanced its binding stability

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