Abstract:Biochars have been modified by alkali (Ca(OH)2) to enhance Cd sorption capacity in aqueous solution. In this research, the alkali-modified (Ca) biochars were prepared by co-pyrolyzing lime (Ca(OH)2) and soybean straw (SBB) or rape straw (RSB) at 450 °C. The absorption mechanism was investigated by a series of experiments and was provided by quantitative analysis. The maximum adsorption capacities of Cd2+ by Ca-SBB and Ca-RSB were calculated to be 78.49 mg g−1 and 49.96 mg g−1, which were 1.56 and 1.48 times hi… Show more
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