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Comparative study on the adsorption of copper and cadmium by corn-straw-derived biochar pyrolyzed at different temperatures
https://doi.org/10.1142/9789813141124_0024Cited by:0 (Source: Crossref)
Abstract:
Biochar (BC) has been widely studied for its ability to remove heavy metals from aqueous solutions. In this study, biochars derived from corn straw were prepared by pyrolysis at 300, 400, 500 and 700 °C. The biochar prepared at a higher pyrolytic temperature, particularly those at 700 °C, had a higher aqeuous Cu2+ and Cd2+ adsorption capacity (BC700, 117.63 mg/g for Cu2+ and 110.76 mg/g for Cd2+). Langmuir isotherm and both pseudo-first-order and pseudo-second-order kinetic models fit well with Cu2+ adsorption on biochars. Freundlich model and pseudo-second-order kinetic model are a better fit for the Cd2+ adsorption.
