In this study, the sorption properties of Cr(VI), As(III), and Pb(II) on chitosan-modified magnetic biochar (CMBC) derived from residues of Hort. were investigated. CMBC was found to be a valuable material for removing three heavy metals from water simultaneously. Kinetic analysis suggested Cr(VI), As(III), and Pb(II) were chemisorbed onto CMBC, while isotherm data conformed well to Langmuir model, the maximum adsorption capacity of CMBC was found to be 65.74 mg/g for Cr(VI), 49.32 mg/g for As(III), and 69.45 mg/g for Pb(II). Experiments, characterization, and density functional theory (DFT) calculations were employed to explore the mechanisms. Furthermore, CMBC demonstrated excellent removal rates of over 95% for Cr(VI), 99% for As(III) and Pb(II) from contaminated water bodies. This work shows that CMBC holds significant potential for wastewater treatment of heavy metals and provides an effective solution for the utilization of Chinese herb residues in environmental remediation.

中文翻译：

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中药渣制备的新型壳聚糖改性生物炭去除多种重金属：表征、性能和机制


在本研究中，研究了源自霍特残留物的壳聚糖改性磁性生物炭 (CMBC) 对 Cr(VI)、As(III) 和 Pb(II) 的吸附特性。被调查。 CMBC被发现是一种同时去除水中三种重金属的有价值的材料。动力学分析表明 CMBC 对 Cr(VI)、As(III) 和 Pb(II) 进行了化学吸附，而等温线数据符合 Langmuir 模型，发现 CMBC 对 Cr(VI) 的最大吸附容量为 65.74 mg/g )、As(III) 为 49.32 mg/g，Pb(II) 为 69.45 mg/g。采用实验、表征和密度泛函理论 (DFT) 计算来探索其机制。此外，CMBC 对受污染水体中的 Cr(VI)、As(III) 和 Pb(II) 的去除率分别超过 95%、99%。这项工作表明，CMBC在重金属废水处理方面具有巨大的潜力，为中药残渣在环境修复中的利用提供了有效的解决方案。