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Sorption of heavy metals in organic horizons of acid forest soils at low added concentrations

Author

Listed:
  • Michaela VYTOPILOVÁ

    (Department of Soil Science and Soil Protection, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic)

  • Václav TEJNECKÝ

    (Department of Soil Science and Soil Protection, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic)

  • Luboš BORŮVKA

    (Department of Soil Science and Soil Protection, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic)

  • Ondřej DRÁBEK

    (Department of Soil Science and Soil Protection, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic)

Abstract

The individual adsorption/desorption of Cu, Pb, and Zn in six soil samples taken from organic horizons of acid forest soils is studied in batch experiments. These three metals were chosen because of the varying extent of their sorption to the soil organic matter. The initial concentration range for all metals is 0-200 mg/l. 0.01 mol/l Ca(NO3)2 was used as the background electrolyte. Soil samples were taken at random locations throughout a relatively small area and are characterized by small differences in mineralogical composition. Organic matter content and pH of soils are considered as the key factors causing differences in sorption/desorption behaviour of selected metals. In general, the sorption of all the three metals increased with a combination of higher pH value and increasing organic matter content. Anyway, the extent of the influence of these two characteristics on sorption behaviour of metals is different, for desorption significant differences were not determined. Copper sorption seems to reflect mainly the differences in organic matter content in addition to the differences in pH. The average amount of sorbed Pb was approximately 90%, Cu sorption averaged 60%, and that of Zn 30%. Desorption of Pb into 0.01 mol/l Ca(NO3)2 remained at approximately 4%, for Zn at 30%, and desorption of Cu reached up to 13% of the amount adsorbed. All the studied soils proved effective at immobilizing lead and copper, but zinc was relatively highly released from these soils, even when the sorbed amount was minimal. Different vegetational background of these samples (either beech or spruce forests) does not significantly influence the sorption extent of these metals as the lower pH of samples taken under spruce stands is probably compensated by higher organic matter content in these samples. The experimental data are fitted by the Freundlich equation and the parameters of this equation together with the adsorption and desorption efficiency are used for comparison of the behaviour of all the three metals among the six soils.

Suggested Citation

  • Michaela VYTOPILOVÁ & Václav TEJNECKÝ & Luboš BORŮVKA & Ondřej DRÁBEK, 2015. "Sorption of heavy metals in organic horizons of acid forest soils at low added concentrations," Soil and Water Research, Czech Academy of Agricultural Sciences, vol. 10(1), pages 1-9.
    • Handle: RePEc:caa:jnlswr:v:10:y:2015:i:1:id:144-2014-swr
    DOI: 10.17221/144/2014-SWR
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    References listed on IDEAS

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    1. Lenka Pavlů & Luboš Borůvka & Antonín Nikodem & Marcela Rohošková & Vít Penížek, 2007. "Altitude and forest type effects on soils in the Jizera Mountains region," Soil and Water Research, Czech Academy of Agricultural Sciences, vol. 2(2), pages 35-44.
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    Cited by:

    1. Mohib Ullah & Ruqia Nazir & Muslim Khan & Waliullah Khan & Mohib Shah & Sahib Gul Afridi & Amir Zada, 2020. "The effective removal of heavy metals from water by activated carbon adsorbents of Albizia lebbeck and Melia azedarach seed shells," Soil and Water Research, Czech Academy of Agricultural Sciences, vol. 15(1), pages 30-37.

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