The Adsorption Properties of Agricultural and Forest Soils Towards Heavy Metal Ions (Ni,Cu, Zn,and Cd) |
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| Authors: | Myroslav Sprynskyy Tomasz Kowalkowski Hlanganani Tutu Leonard Mihaly Cozmuta Ewa M Cukrowska Boguslaw Buszewski |
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| Institution: | 1. Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry , Nicolaus Copernicus University , Toruń, Poland;2. School of Chemistry, Faculty of Science , University of the Witwatersrand , Johannesburg, South Africa;3. Chemistry-Biology Department , North University of Baia Mare , Baia Mare, Romania |
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| Abstract: | Adsorption of Cu, Cd, Ni, and Zn in single and multi-metal solutions by agricultural and forest soils was investigated in batch sorption experiments. The results showed significant differences in sorption capacities of the studied soils. The selectivity order was as follows: agricultural soil? top forest soil > bottom forest soil. The adsorption sequence Cu > Zn > Ni > Cd was established for the agricultural and bottom forest soil, while the order for the top forest soil was Cu > Ni > Zn > Cd. The experimental isotherms for the metal sorption were described satisfactorily by the Freundlich and Langmuir models. The competitive adsorption experiment indicated a reduction in the amount of metals adsorbed by the soils from the multi-metal solution compared to the single metal solution. Properties of the soils, such as pH, content of clay and organic matter, exchangeable bases and hydrolytic acidity, showed a significant influence on adsorption capacities of the studied soils. |
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| Keywords: | heavy metals agricultural soil forest soil adsorption |
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