机构地区: 湖南大学环境科学与工程学院
出 处: 《化工环保》 2008年第4期296-299,共4页
摘 要: 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50 mg/L、豆渣质量浓度为10.0 g/L 的条件下,吸附12 h,Cd^(2+)和 Zn^(2+)的去除率分别为96.0%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19.61 mg/g 和11.11 mg/g。 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%, respectively. The maximum uptake of Cd^2+ and Zn^2+ are 19.61 mg/g and 11.11 mg/g, respectively.
领 域: [环境科学与工程]