Abstract
Isotherms for sorption of 2-methoxyethylmercury chloride (Aretan) and HgCl2 showed that all three soils investigated had a large capacity to adsorb these Hg compounds, the order being Morogoro > Arusha > Dar es Salaam. For all soils, surface horizons adsorbed more Hg at any given concentration of Hg in solution as compared to subsurface horizons. Adsorption isotherms of Aretan, especially at lower equilibrium concentration in soil solution, were much steeper in all horizons and in all profiles. The Freundlich equation described the adsorption of HgCl2 better than that of Aretan. The adsorption isotherms for Aretan and HgCl2 showed different forms, implying probably that different adsorption mechanisms were involved.
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Semu, E., Singh, B.R. & Selmer-Olsen, A.R. Adsorption of mercury compounds by tropical soils III. Adsorption isotherms. Water Air Soil Pollut 32, 11–16 (1987). https://doi.org/10.1007/BF00227679
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DOI: https://doi.org/10.1007/BF00227679