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Mechanisms of competitive adsorption of Pb, Cu, and Cd on peat
Qin, F; Wen, B; Shan, XQ; Xie, YN; Liu, T; Zhang, SZ; Khan, SU; Xie YN(谢亚宁); Liu T(刘涛)
Corresponding AuthorChinese Acad Sci, Ecoenvironm Sci Res Ctr, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China ; Beijing Union Univ, Coll Art & Sci, Dept Biol, Beijing 100049, Peoples R China ; Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Lab, Beijing 100049, Peoples R China ; George Mason Univ, Dept Chem & Biochem, Fairfax, VA 22030 USA
AbstractCombined use of batch equilibration adsorption and X-ray absorption spectroscopy (XAS) was employed to study the mechanisms of competitive adsorption of Ph, Cu, and Cd on Danish and Heilongjiang peat in single- and multi-solute systems. The adsorption capacity and initial adsorption rate on the same peat in single-solute systems followed the order Ph > Cu > Cd. Both the adsorbed amount of each metal (q '(m)) and its initial adsorption rate were decreased in multi-solute systems. It was observed that the adsorbed amounts of metals at low-energy adsorption sites (q(m,l)) decreased pronouncedly compared to those at high-energy adsorption sites (q(m,2)), indicating that the competitive adsorption of Ph, Cu and Cd occurred mainly at the low-energy adsorption sites. XAS study revealed that both Ph and Cu were coordinated in peat predominantly to carboxylic moieties without excluding the hydroxyl groups, thereby providing an insight into the mechanism of competitive adsorption of Ph and Cu on peat. (c) 2006 Elsevier Ltd. All rights reserved.
Keywordpeat heavy metals competitive adsorption kinetics X-ray absorption spectroscopy
Subject AreaEnvironmental Sciences & Ecology
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000241574700037
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Document Type期刊论文
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Qin, F,Wen, B,Shan, XQ,et al. Mechanisms of competitive adsorption of Pb, Cu, and Cd on peat[J]. ENVIRONMENTAL POLLUTION,2006,144(2):669-680.
APA Qin, F.,Wen, B.,Shan, XQ.,Xie, YN.,Liu, T.,...&刘涛.(2006).Mechanisms of competitive adsorption of Pb, Cu, and Cd on peat.ENVIRONMENTAL POLLUTION,144(2),669-680.
MLA Qin, F,et al."Mechanisms of competitive adsorption of Pb, Cu, and Cd on peat".ENVIRONMENTAL POLLUTION 144.2(2006):669-680.
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