Abstract
The ability of an immature coal (leonardite) to remove zincfrom aqueous solutions was studied as a function of pH,contact time and concentration of metal solutions.Effective removal of Zn2+ was demonstrated at pHvalues of 5–6. Kinetic study showed that the adsorption ofZn2+ occurs in two phases: a rapid phase followed by aquasi-equilibrium state attained within the first twohours. The adsorption isotherm was measured at 25 °C, using adsorptive solutions at the optimum pH value todetermine the adsorption capacity.
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Solé, M., Casas, J.M. & Lao, C. Removal of Zn from Aqueous Solutions by Low-Rank Coal. Water, Air, & Soil Pollution 144, 57–65 (2003). https://doi.org/10.1023/A:1022965417124
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DOI: https://doi.org/10.1023/A:1022965417124