Mechanism of novel MoS2-modified biochar composites for removal of cadmium (II) from aqueous solutions

文献类型： 外文期刊

第一作者： Khan, Zulqarnain Haider

作者： Khan, Zulqarnain Haider;Gao, Minling;Song, Zhengguo;Khan, Zulqarnain Haider;Khan, Zulqarnain Haider;Qiu, Weiwen

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关键词： Biochar; MoS2 nanoparticles; Cadmium; Adsorption mechanism

期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：4.223； 五年影响因子：4.306 ）

ISSN： 0944-1344

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收录情况： SCI

摘要： The purpose of this study was to develop a MoS2-impregnated biochar (MoS2@BC) via hydrothermal reaction for adsorption of cadmium (Cd) from an aqueous solution. The prepared adsorbents were characterized, and their abilities to remove Cd(II) were evaluated. The Langmuir and pseudo-second-order models better described the removal of Cd(II) by MoS2@BC. The prepared MoS2@BC exhibited excellent monolayer adsorption capacity. The S-containing functional groups on MoS2@BC enhanced the adsorption of Cd(II). Multiple Cd(II) sorption mechanisms were identified; including Cd(II)-pi interactions, ion exchange, electrostatic interaction, and complexation. The dominant mechanism involved Cd-O (38.3%) bonds and Cd-S complexation (61.7%) on MoS2@BC. The as-prepared MoS2@BC is both economical and efficient, making it an excellent material for environmental Cd(II) remediation.

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