Mechanism of novel MoS2-modified biochar composites for removal of cadmium (II) from aqueous solutions
文献类型: 外文期刊
作者: Khan, Zulqarnain Haider 1 ; Gao, Minling 1 ; Qiu, Weiwen 4 ; Song, Zhengguo 1 ;
作者机构: 1.Shantou Univ, Dept Civil & Environm Engn, Shantou 515063, Peoples R China
2.Minist Agr China, Agroenvironm Protect Inst, Tianjin 300191, Peoples R China
3.Chinese Acad Agr Sci, Beijing 100081, Peoples R China
4.New Zealand Inst Plant & Food Res Ltd, Private Bag 4704, Christchurch 8140, New Zealand
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
年卷期:
页码:
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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