数字农科院2.0

Removal of cadmium in aqueous solutions using a ball milling–assisted one-pot pyrolyzed iron-biochar composite derived from cotton husk

文献类型： 外文期刊

作者： Chen C.; Yang F.; Beesley L.; Trakal L.; Ma Y.; Sun Y.; Zhang Z.; Ding Y.

作者机构：

期刊名称： Environmental Science and Pollution Research

ISSN： 0944-1344

年卷期： 2022 年

页码：

收录情况： SCIE（2022版）

摘要： A novel iron-biochar composite adsorbent was produced via ball milling–assisted one-pot pyrolyzed BM-nZVI-BC 800. Characterization proved that nano zero valent iron was successfully embedded in the newly produced biochar, and the nZVI payload was higher than that of traditional one-pot pyrolyzed methods. BM-nZVI-BC 800 provided a high adsorption performance of cadmium reaching 96.40 mg·g−1 during batch testing. Alkaline conditions were beneficial for cadmium removal of BM-nZVI-BC 800. The pseudo-second-order kinetic model and Langmuir isotherm fitted better, demonstrating that the Cd adsorption on the BM-nZVI-BC 800 was a chemical and surface process. The intraparticle diffusion controlled the adsorption of BM-nZVI-BC 800. The physisorption dominated by high specific surface area and mesoporous structure was the primary mechanism in the removal of cadmium, though electrostatic attraction and complexation also played a secondary role in cadmium adsorption. Compared to adsorbents prepared by more traditional methods, the efficiencies of the ball milling–assisted one-pot pyrolyzed method appears superior. Graphical abstract: [Figure not available: see fulltext.] © 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

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