数字农科院2.0

Efficient As(Iii) Removal By Novel Mos2-Impregnated Fe-Oxide-Biochar Composites: Characterization And Mechanisms

文献类型： 外文期刊

作者： Khan, ZH; Gao, ML; Qiu, WW; Song, ZG

作者机构：

期刊名称： ACS OMEGA

ISSN： 2470-1343

年卷期： 2020 年 5 卷 22 期

页码：

收录情况： JCR（2021版）

摘要： Sorbents that efficiently eliminate toxic metal(loid)s from industrial wastes are required for the protection of the environment and human health. Therefore, we demonstrated efficient As(III) removal by novel, eco-friendly, hydrothermally prepared MoS2-impregnated FeOx@BC800 (MSF@BC800). The properties and adsorption mechanism of the material were investigated by X-ray photoelectron spectroscopy, Brunauer-Emmett-Teller analysis, X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy. The synergistic effects of FeOx and MoS2 on MSF@BC800 considerably enhanced As(III)-removal efficiency to >= 99.73% and facilitated superior As(III) affinity in aqueous solutions (K-d >= 10(5) mL g(-1)) compared to those of FeOx@BC800 and MS@BC800, which showed 37.07 and 17.86% As(III)-removal efficiencies and K-d = 589 and 217 mL g(-1), respectively, for an initial As(III) concentration of similar to 10 mg L-1. The maximum Langmuir As(III) sorption capacity of MSF@BC800 was 28.4 mg g(-1). Oxidation of As(III) to As(V) occurred on the MSF@BC800 composite surfaces. Adsorption results agreed with those obtained from the Freundlich and pseudo-second-order models, suggesting multilayer coverage and chemisorption, respectively. Additionally, MSF@BC800 characteristics were examined under different reaction conditions, with temperature, pH, ionic strength, and humic acid concentration being varied. The results indicated that MSF@BC800 has considerable potential as an eco-friendly environmental remediation and As(III)-decontamination material.

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