PMID: 15224741Jul 1, 2004Paper

Surface complexation of copper(II) on soil particles: EPR and XAFS studies

Environmental Science & Technology
Karine FlogeacMichel Aplincourt

Abstract

The interactions of transition metals with natural systems play an important role in the mobility and the bioavailability of these metals in soils. In this study, the adsorption of copper(II) onto natural soil particles was studied as a function of pH and metal concentration. The retention capacity of soil particles was determined at pH 6.2 to be equal to 6.7 mg of copper/g of solid. The Langmuir and Freundlich isotherm equations were then used to describe the partitioning behavior of the system at different pH values. A combination of EPR, extended X-ray absorption fine structure (EXAFS), and X-ray absorption near-edge structure (XANES) spectroscopies was used to probe the Cu atomic environment at the soil particles/aqueous interface. The spectroscopic study revealed that copper(II) ions are held in inner-sphere surface complexes. It also revealed that Cu was in an octahedral coordination with first-shell oxygen atoms. A weak tetragonal distortion was pointed out due to the Jahn-Teller effect, with a mean Cu-Oequatorial bond distance of 1.96 A and a Cu-Oaxial bond distance of 2.06 A. A detailed analysis of the spectroscopic data suggested that Cu(II) was bonded to organic matter coated onto the mineral fraction of soil particles.

References

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Citations

Dec 11, 2008·Environmental Science and Pollution Research International·Jun LiuQian Wang
Nov 23, 2013·Environmental Science & Technology·Courtney L PhillipsDerek Peak
Oct 31, 2013·Environmental Science and Pollution Research International·Jianjun YangJohn S Tse
Mar 28, 2009·Water Research·Guang-Cai ChenJoseph J Pignatello
Jan 23, 2009·Journal of Environmental Management·Su-Hsia LinRuey-Shin Juang
May 13, 2015·Scientific Reports·Chen LingBaoshan Xing
May 19, 2009·Environmental Pollution·Daniel G Strawn, Leslie L Baker
Apr 18, 2006·Environmental Pollution·Fei QinShahamat U Khan
Apr 7, 2017·Environmental Science & Technology·TianTian XiongSophie Sobanska
Dec 5, 2006·Journal of Colloid and Interface Science·Stéphanie BoudesocqueLorenzo Stievano
Feb 26, 2011·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Ji-Yan ShiYing-Xu Chen
Jan 13, 2018·Chemosphere·Charlotta TibergJon Petter Gustafsson
Mar 21, 2008·Environmental Science & Technology·Daniel G Strawn, Leslie L Baker
Oct 16, 2008·Environmental Science & Technology·Zhiguo PeiGary Owens
Jul 14, 2021·Environmental Pollution·Mathias SteinThilo Rennert
Dec 17, 2008·Environmental Science & Technology·Guang-Cai ChenGary Owens
Sep 11, 2018·Environmental Science & Technology·Judith MehlhornBritta Planer-Friedrich
May 12, 2005·Environmental Science & Technology·Geoffrey J PuzonLuying Xun

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