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Chitosan modification of magnetic biochar produced from Eichhornia crassipes for enhanced sorption of Cr(VI) from aqueous solution

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成果类型:
期刊论文
作者:
Zhang, Ming-ming;Liu, Yun-guo*;Li, Ting-ting;Xu, Wei-hua;Zheng, Bo-hong;Tan, Xiao-fei;Wang, Hui;Guo, Yi-ming;Guo, Fang-ying;Wang, Shu-fan
通讯作者:
Liu, Yun-guo
作者机构:
[Liu, Yun-guo; Wang, Hui; Guo, Fang-ying; Zhang, Ming-ming; Wang, Shu-fan; Li, Ting-ting; Tan, Xiao-fei; Xu, Wei-hua] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
[Liu, Yun-guo; Wang, Hui; Guo, Fang-ying; Zhang, Ming-ming; Wang, Shu-fan; Li, Ting-ting; Tan, Xiao-fei; Xu, Wei-hua] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.
[Zheng, Bo-hong] Cent S Univ, Sch Architecture & Art, Changsha 410082, Hunan, Peoples R China.
[Guo, Yi-ming] Shanghai Maritime Univ, Sch Econ & Management, Shanghai 201306, Peoples R China.
通讯机构:
[Liu, Yun-guo] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
语种:
英文
期刊:
RSC Advances
ISSN:
2046-2069
年:
2015
卷:
5
期:
58
页码:
46955-46964
文献类别:
WOS:Article;EI:Journal article (JA)
所属学科:
ESI学科类别:化学;WOS学科类别:Chemistry, Multidisciplinary
入藏号:
WOS:000355702900066;EI:20152300917949
机构署名:
本校为其他机构
院系归属:
建筑与艺术学院
摘要:
In this research, chitosan modification of magnetic biochar (CMB) was successfully prepared for effective removal of Cr(vi). Moreover, this study highlighted that the conversion of Eichhornia crassipes into biochar was a promising method for improved management of this highly problematic invasive species. The sorption kinetics, isotherms, thermodynamics, the effects of pH, and background electrolyte on the sorption process were investigated. The results indicated that CMB adsorbed more Cr(vi) (120 mg g<sup>-1</sup>) than that of pristine biochar (30 mg g<sup>-1</sup>). The sorption data could be well illustrated by pseudo-second-order and Langmuir models. Furthermore, thermodynamic parameters revealed that the sorption reaction was an endothermic and spontaneous process. The adsorption of Cr(vi) was influenced by solution pH and the maximum sorption capacity was achieved at pH 2. The background electrolyte PO<inf>4</inf><sup>3-</sup>and SO<inf>4</inf><sup>2-</sup>restricted the Cr(vi) sorption. These results are significant for exploring and optimizing the removal of metal ions by the CMB composite. ©2015 The Royal Society of Chemistry.
参考文献:
Aydin YA, 2009, CHEM ENG J, V151, P188, DOI 10.1016/j.cej.2009.02.010
Chen BL, 2011, BIORESOURCE TECHNOL, V102, P716, DOI 10.1016/j.biortech.2010.08.067
Chen T, 2014, BIORESOURCE TECHNOL, V164, P47, DOI 10.1016/j.biortech.2014.04.048
Cheng Q, 2011, CHEM ENG J, V173, P42, DOI 10.1016/j.cej.2011.07.033
Dong XL, 2011, J HAZARD MATER, V190, P909, DOI 10.1016/j.jhazmat.2011.04.008

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