Application of XAFS and XRD methods for describing the copper and zinc adsorption characteristics in hydromorphic soils
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ORIGINAL PAPER
Application of XAFS and XRD methods for describing the copper and zinc adsorption characteristics in hydromorphic soils Tatiana V. Bauer . David L. Pinskii . Tatiana M. Minkina . Victoria A. Shuvaeva . Alexander V. Soldatov . Saglara S. Mandzhieva Victoria S. Tsitsuashvili . Dina G. Nevidomskaya . Ivan N. Semenkov
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Received: 31 March 2020 / Accepted: 30 October 2020 Ó Springer Nature B.V. 2020
T. V. Bauer Federal Research Centre, The Southern Scientific Centre of the Russian Academy of Sciences, Rostov-on-Don 344006, Russian Federation
higher range of values of the adsorption process parameters relative to Zn. The Zn is likely to be the most critical environmental factor in such soils since it exhibited a decreased sorption under competitive conditions. The retention mechanisms of HM in hydromorphic soils are considered. Based on theoretical calculations of ion activity in soil solutions using solubility diagrams of Cu and Zn compounds, the possibility of precipitation of Cu hydroxide and Zn carbonate in the studied soils is shown. Direct physical methods of nondestructive testing (XAFS and XRD) are applied to experimentally prove the formation of these HM compounds on the surface of montmorillonite, the dominant mineral in hydromorphic soils, and calcite. Thus, the combination of both physicochemical methods and direct physical methods can provide a large amount of real information about the mechanisms of HM retain with solid phases.
D. L. Pinskii (&) Institute of Physicochemical and Biological Problems of Soil Science, Russian Academy of Sciences, Institutskaya str, 2, Pushchino, Pushchino 142290, Russian Federation e-mail: [email protected]
Keywords Potentially toxic elements Floodplain soils Pollution Layered minerals Competitive adsorption Langmuir model X-ray powder diffraction XANES spectroscopy Sedimentation
Abstract Modeling metal sorption in soils is of great importance to predict the fate of heavy metals and to assess the actual risk driven from pollution. The present study focuses on adsorption of HM ions on two types of hydromorphic soils, including calcaric fluvisols loamic and calcaric fluvic arenosols. The individual and competitive adsorption behaviors of Cu and Zn on soils and soil constituents are evaluated comprehensively. It is established that the sorption processes were best described with the Langmuir model. The results suggest that the calcaric fluvic arenosols are more vulnerable to heavy metal input compared to fluvisols loamic. In all cases, Cu had a
T. M. Minkina V. A. Shuvaeva A. V. Soldatov S. S. Mandzhieva V. S. Tsitsuashvili D. G. Nevidomskaya Southern Federal University, Rostov-on-Don 344006, Russian Federation I. N. Semenkov Lomonosov Moscow State University, Moscow 119991, Russian Federation
Introduction Heavy metals (HMs) are hazardous elements and well known to impose a threat to human health. Among
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Environ Geochem Health
HMs, Cu and Zn are the priority pollutants included
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