环境工程学报2012，Vol.6Issue(11)：4034-4040,7.
改性污泥活性炭对水中镉离子的吸附性能
Adsorption of Cd(Ⅱ) from aqueous solution by modified activated carbon made from activated sludge
摘要
Abstract
Activated carbon was prepared from excessive sludge from municipal wastewater treatment plant,and zinc chloride was used as the activation reagent.The activated carbon from sludge was also treated using 6.0 mol/L nitric acid to prepare modified activated carbon.The performances of the two types of activated carbon for Cd2+ adsorption were compared.Results show that the adsorption capacity of the unmodified activated carbon and modified activated carbon was 8.45 and 23.35 mg of Cd2+ per g of activated carbon,respectively at a pH of 5.0,an initial concentration of Cd2+ of 100 mg/L,and a dosage of activated carbon of 2.0 g/L.Therefore,these two types of activated carbon had good adsorption capacities,and the modification by nitric acid greatly improved the adsorption performance for Cd2+.At room temperature,the adsorption of Cd2+ by the modified sludge activated carbon accords with the Langmuir equation pretty well.关键词
活性污泥/活性炭/吸附/Cd2＋/硝酸改性Key words
activated sludge/activated carbon/adsorption/Cd2+/modification by nitric acid分类
资源环境引用本文复制引用
何慧军,杨春平,罗胜联,郑颖,刘莉华..改性污泥活性炭对水中镉离子的吸附性能[J].环境工程学报,2012,6(11):4034-4040,7.基金项目
国家自然科学基金资助项目 （）
