pH dependence of copper adsorption in vineyard soils of Geneva |
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Authors: | Fredi Celardin Cyril Trouillet Raphaël Tisiot |
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Institution: | (1) Filière Agronomie, Ecole dIngénieurs de Lullier, 1254 Jussy, Switzerland |
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Abstract: | Copper adsorption by vineyard soils of the Geneva canton was evaluated by batch equilibration experiments in a pH range from 4 to 6. The adsorption curves fit significantly to Freundlich function log q = n log C + log Kf, where q is adsorbed Cu concentration on the solid phase and C is solution Cu concentration at the end of the equilibration time. Moreover, we found that Freundlich parameters n and log Kf are moderately correlated to pH, yielding the following equations: log Kf = 0.23 pH + 0.51 (R
2 0.59) and n = –0.12 pH + 1.06 (R
2 0.59). Such equations may be useful to predict Cu mobility for risk assessment studies. |
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Keywords: | Cu adsorption isotherms Cu mobility Vineyard soils |
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