Department of Civil and Environmental Engineering, Shantou University, Shantou, 515063, China.
Agro-Environmental Protection Institute, Ministry of Agriculture of China, Tianjin, 300191, China.
Environ Sci Pollut Res Int. 2021 Jul;28(26):34979-34989. doi: 10.1007/s11356-021-13199-9. Epub 2021 Mar 4.
The purpose of this study was to develop a MoS-impregnated biochar (MoS@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 MoS@BC. The prepared MoS@BC exhibited excellent monolayer adsorption capacity. The S-containing functional groups on MoS@BC enhanced the adsorption of Cd(II). Multiple Cd(II) sorption mechanisms were identified; including Cd(II)-π interactions, ion exchange, electrostatic interaction, and complexation. The dominant mechanism involved Cd-O (38.3%) bonds and Cd-S complexation (61.7%) on MoS@BC. The as-prepared MoS@BC is both economical and efficient, making it an excellent material for environmental Cd(II) remediation.
本研究旨在通过水热反应制备负载 MoS 的生物炭（MoS@BC），用于从水溶液中吸附镉（Cd）。对所制备的吸附剂进行了表征，并评估了其去除 Cd(II)的能力。Langmuir 和准二级模型更好地描述了 MoS@BC 对 Cd(II)的去除。制备的 MoS@BC 表现出优异的单层吸附容量。MoS@BC 上的含 S 官能团增强了对 Cd(II)的吸附。鉴定了多种 Cd(II)吸附机制，包括 Cd(II)-π 相互作用、离子交换、静电相互作用和络合。在 MoS@BC 上，主要的机制涉及 Cd-O（38.3%）键和 Cd-S 络合（61.7%）。所制备的 MoS@BC 既经济又高效，是一种用于环境 Cd(II)修复的优良材料。
