豆渣对水中Cd2+和Zn2+的吸附

研究了新型生物吸附剂豆渣对水中Cd^2＋和Zn^2＋的吸附机制和吸附能力；分析了吸附时间、溶液pH、豆渣质量浓度和重金属离子质量浓度对重金属离子去除效果的影响。豆渣对Cd^2＋和Zn^2＋的吸附过程符合Langmuir等温吸附方程。在Cd^2＋溶液和Zn^2＋溶液的pH分别为6．0和7．0、质量浓度为50mg／L、豆渣质量浓度为10．0g／L的条件下，吸附12h，Cd^2＋和Zn^2＋的去除率分别为96．O％和89．4％。通过Langmuir吸附等温线模拟，得出豆渣对Cd^2＋和Zn^2＋的最大吸附量分别为19．61mg／g和11．11mg／g。

Adsorption of Cd2+ and Zn2+ in Water by Bean Dregs

Bean dregs were used to remove Cd~(2+) and Zn~(2+) from aqueous solutions.The effects of contact time,solution pH,bean dreg dosage and heavy metal concentration on the adsorptions were investigated.The results indicate that the adsorptions of Cd~(2+) and Zn~(2+) accord with Langmuir isotherms.Under the conditions of Cd~(2+) solution pH 6.0 and Zn~(2+) solution pH 7.0,solution mass concentration 50 mg/L,bean dreg dosage 10.0 g/L,contact time 12 h,the removals of Cd~(2+) and Zn~(2+) are 96.0% and 89.4%,respec...