adsorption of cadmium and copper in representative soils of eastern amazonia, brazil
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2016
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Abstract
Studies of heavy metals adsorption in soil play a key role in predicting environmental susceptibility to contamination by toxic elements. The objective of this study was to evaluate cadmium (Cd) and copper (Cu) adsorption in surface and subsurface soil. Samples of six soils: Xanthic Hapludox (XH1 and XH2), Typic Hapludox (TH), Typic Rhodudalf (TR), Typic Fluvaquent (TF), and Amazonian dark earths (ADE) from Eastern Amazonian, Brazil. The soils were selected for chemical, physical and mineralogical characterization and to determine the adsorption by Langmuir and Freundlich isotherms. All soils characterized as kaolinitic, and among them, XH1 and XH2 showed the lowest fertility. The Langmuir and Freundlich isotherms revealed a higher Cu (H curve) than Cd (L curve) adsorption. Parameters of Langmuir and Freundlich isotherms indicate that soils TR, TF and ADE has the greatest capacity and affinity for metal adsorption. Correlation between the curve adsorption parameters and the soil attributes indicates that the pH, CEC, OM and MnO variables had the best influence on metal retention. The Langmuir and Freundlich isotherms satisfactorily described Cu and Cd soil adsorption, where TR, TF and ADE has a lower vulnerability to metal input to the environment. Besides the pH, CEC and OM the MnO had a significant effect on Cu and Cd adsorption in Amazon soils.
| Reference Key |
gonalves2016semina:adsorption
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| Authors | ;Deyvison Andrey Medrado Gonçalves;Gilson Sergio Bastos de Matos;Antonio Rodrigues Fernandes;Katiane Raquel Mendes Barros;Danielle do Socorro Nunes Campinas;Cristine Bastos do Amarante |
| Journal | frontiers in neuroendocrinology |
| Year | 2016 |
| DOI |
10.5433/1679-0359.2016v37n5p3005
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