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Zn adsorption by variable charge soils in relation to pH


, : Zn adsorption by variable charge soils in relation to pH. Pedosphere 3(1): 23-33

The relationship between Zn adsorption and pH in soil was studied, and possible adsorption mechanisms are discussed. At low pH values, where Zn adsorbed did not exceed 50% of Zn applied, specific adsorption was the dominant mechanism, free Zn2+ ion being the species of Zn specifically adsorbed. At intermediate and high pH values, specific and electrostatic adsorption coexisted, at about 70 and 30%, respectively.

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