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Mechanisms of competitive adsorption of Pb, Cu, and Cd on peat

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Qin, Fei, Wen, Bei, Shan, Xiao-Quan, Xie, Ya-Ning, Liu, Tao, Zhang, Shu-Zhen, Khan, Shahamat U.·2006·Environmental Pollution

Abstract

Combined use of batch equilibration adsorption and X-ray absorption spectroscopy (XAS) was employed to study the mechanisms of competitive adsorption of Pb, 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 Pb>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 (qm,1) decreased pronouncedly compared to those at high-energy adsorption sites (qm,2), indicating that the competitive adsorption of Pb, Cu and Cd occurred mainly at the low-energy adsorption sites. XAS study revealed that both Pb 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 Pb and Cu on peat.

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Metadata

Authors
Qin, F., Wen, B., Shan, X.-Q., Xie, Y.-N., Liu, T., Zhang, S.-Z., & Khan, S. U.
Venue
Environmental Pollution
Publisher
Elsevier BV
Published
2006-11
Volume
144
Issue
2
Pages
669-680
ISSN
0269-7491 (ISSN-L)
OpenAlex
W2015204322
Cited by
259
References
2
FWCI
12.58
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Mechanisms of competitive adsorption of Pb, Cu, and Cd on peat. https://app.cochat.ai/papers/10.1016/j.envpol.2005.12.036
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Qin, F., Wen, B., Shan, X.-Q., Xie, Y.-N., Liu, T., Zhang, S.-Z., & Khan, S. U. (2006). Mechanisms of competitive adsorption of Pb, Cu, and Cd on peat. Environmental Pollution. https://doi.org/10.1016/j.envpol.2005.12.036

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