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Effect of porous zinc–biochar nanocomposites on Cr(VI) adsorption from aqueous solution

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WOS被引频次:70
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成果类型:
期刊论文
作者:
Gan, Chao;Liu, Yunguo*;Tan, Xiaofei;Wang, Shufan;Zeng, Guangming;Zheng, Bohong;Li, Tingting;Jiang, Zhengjiang;Liu, Wei
通讯作者:
Liu, Yunguo
作者机构:
[Wang, Shufan; Liu, Yunguo; Zeng, Guangming; Li, Tingting; Tan, Xiaofei; Liu, Wei; Gan, Chao; Jiang, Zhengjiang] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
[Wang, Shufan; Liu, Yunguo; Zeng, Guangming; Li, Tingting; Tan, Xiaofei; Liu, Wei; Gan, Chao; Jiang, Zhengjiang] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.
[Zheng, Bohong] Cent S Univ, Sch Architecture & Art, Changsha 410082, Hunan, Peoples R China.
通讯机构:
[Liu, Yunguo] 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
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:000353168300075;EI:20151700794064
机构署名:
本校为其他机构
院系归属:
建筑与艺术学院
摘要:
A new synthesis method was developed to produce zinc–biochar nanocomposites from sugarcane bagasse. The modified biochar maintained 1.2 to 2.0 times higher removal efficiency than that of pristine biochar. FTIR, XPS, BET and SEM were used to analyse the physical and chemical properties of the composite adsorbent. Batch sorption experiments were carried out to investigate the adsorption behavior of Cr(VI) by zinc–biochar. Experimental data were better fitted by a pseudo-second-order kinetics equation and the Freundlich isotherm model. Thermodynamic analysis indicated that the adsorption process was spontaneous and endothermic. The maximum adsorption of the modified biochar was observed at pH 2.0 with the sorption capacity of 102.66 mg g−1. The adsorbed zinc–biochar could be effectively regenerated by 0.5 mol L−1 NaOH solution and the adsorption ability decreased from 84.16 to 59.75 mg g−1 in the sixth cycle. In conclusion, the porous zinc–biochar showed great potential advantages in the removal of Cr(VI) from wastewater.
参考文献:
Ahmad M, 2014, CHEMOSPHERE, V99, P19, DOI 10.1016/j.chemosphere.2013.10.071
Babel S, 2004, CHEMOSPHERE, V54, P951, DOI 10.1016/j.chemosphere.2003.10.001
Badruddoza AM, 2013, CARBOHYD POLYM, V91, P322, DOI 10.1016/j.carbpol.2012.08.030
Baek K, 2004, J HAZARD MATER, V108, P119, DOI 10.1016/j.jhazmat.2004.02.001
Choi HD, 2009, J HAZARD MATER, V166, P642, DOI 10.1016/j.jhazmat.2008.11.076

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