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Competitive removal of Cd(II) and Pb(II) by biochars produced from water hyacinths: performance and mechanism

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WOS被引频次:45
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成果类型:
期刊论文
作者:
Ding, Yang;Liu, Yunguo*;Liu, Shaobo*;Li, Zhongwu;Tan, Xiaofei;Huang, Xixian;Zeng, Guangming;Zhou, Yaoyu;Zheng, Bohong;Cai, Xiaoxi
通讯作者:
Liu, Yunguo;Liu, Shaobo
作者机构:
[Liu, Yunguo; Li, Zhongwu; Zeng, Guangming; Tan, Xiaofei; Cai, Xiaoxi; Zhou, Yaoyu; Ding, Yang; Huang, Xixian] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
[Liu, Yunguo; Li, Zhongwu; Zeng, Guangming; Tan, Xiaofei; Cai, Xiaoxi; Zhou, Yaoyu; Ding, Yang; Huang, Xixian] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China.
[Liu, Shaobo; Zheng, Bohong] Cent S Univ, Sch Architecture & Art, Changsha 410082, Hunan, Peoples R China.
[Liu, Shaobo] Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China.
通讯机构:
[Liu, Yunguo] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
[Liu, Yunguo] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China.
[Liu, Shaobo] Cent S Univ, Sch Architecture & Art, Changsha 410082, Hunan, Peoples R China.
[Liu, Shaobo] Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China.
语种:
英文
期刊:
RSC Advances
ISSN:
2046-2069
年:
2016
卷:
6
期:
7
页码:
5223-5232
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:000368941700011;EI:20160501872890
机构署名:
本校为通讯机构
院系归属:
冶金与环境学院
建筑与艺术学院
摘要:
Three biochars converted from water hyacinth biomass at 300, 450, and 600 &deg;C were used to investigate the adsorption properties of Cd<sup>2+</sup>and Pb<sup>2+</sup>. In addition, the competitive adsorption mechanisms between Cd<sup>2+</sup>and Pb<sup>2+</sup>were also conducted. Adsorption kinetics and isotherms indicated that the maximum adsorption capacity of Pb<sup>2+</sup>was larger than that of Cd<sup>2+</sup>, and the adsorption process in the mixed solutions of two heavy metals (Cd<sup>2+</sup>and Pb<sup>2+</sup>) was more favorable for Pb<sup>2+</sup>. Further investigation about the characterization of biochars demonstrated that cation exchange, surface complexation, cation-&pi;interaction and precipitation were the main mechanisms responsible for the heavy metal removal. In this study, competitive adsorption may also be explained by these mechanisms. These results are useful for the application of biochars in selective adsorption and in practical wastewater treatment. &copy;2016 The Royal Society of Chemistry.
参考文献:
Ahmad M, 2013, BIORESOURCE TECHNOL, V143, P615, DOI 10.1016/j.biortech.2013.06.033
Ahmad M, 2012, BIORESOURCE TECHNOL, V118, P536, DOI 10.1016/j.biortech.2012.05.042
Bonelli PR, 2007, ENERG SOURCE PART A, V29, P731, DOI 10.1080/00908310500281247
Brandli RC, 2009, ENVIRON TOXICOL CHEM, V28, P503, DOI 10.1897/08-236.1
Cao XD, 2009, ENVIRON SCI TECHNOL, V43, P3285, DOI 10.1021/es803092k

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