铅对铁铝复合氧化物吸附铜的影响  

Influence of Lead on Adsorption of Fe-Al Binary Oxide for Copper

作　　者：吴迪[1] 郭彦秀 赵欣[1] 陈子明 张莹[1] 董玉良[1] 任丽英[1] WU Di;GUO Yanxiu;ZHAO Xin;CHEN Ziming;ZHANG Ying;DONG Yuliang;REN Liying(Shandong Provincial Key Laboratory of Soil Conservation and Environmental Protection,College of Resources and Environment,Linyi University,Linyi,Shandong 276000,China)

机构地区：[1]临沂大学资源环境学院山东省水土保持与环境保育重点实验室,山东临沂276000

出　　处：《天津农业科学》2019年第3期84-87,共4页Tianjin Agricultural Sciences

基　　金：国家自然科学基金(41201228);山东省自然科学基金(ZR2016BL26;ZR2018LD001);山东省林业科技创新项目(LYCX08-2018-411)

摘　　要：复合氧化物对环境中的金属离子具有较高的吸附容量。但2种或多种金属离子共存条件下,复合氧化物的吸附行为仍缺乏全面的了解。本文通过批吸附试验方法,研究溶液中有无Pb^(2+)共存时,铁铝复合氧化物对Cu^(2+)吸附容量的影响。结果表明,当溶液中不存在Pb^(2+)时,Cu^(2+)在铁铝复合氧化物表面的Qmax为149.08 mg·g^(-1)。当溶液中Pb^(2+)和Cu^(2+)共存时,Cu^(2+)的Qmax降低到28.81 mg·g^(-1)。在pH值3～7的范围内,随着溶液pH值的升高,Cu^(2+)在铁铝复合氧化物表面的吸附量呈现逐渐增加的趋势。此外在相同的pH值条件下,Pb^(2+)的存在减少了吸附在氧化物表面的Cu^(2+)量。存在或不存在Pb^(2+)的情况下,Cu^(2+)在氧化物表面上的吸附动力学均遵循Elovich方程,并且在约120 min时达到吸附平衡。Binary oxide have a strong adsorption capacity for heavy metals.But the adsorption behavior of binary oxide was unclear,when there were more than two heavy metals exist.In this paper,the adsorption of Cu^2+by Fe-Al binary oxide in the presence of Pb^2+were studied by batch adsorption experiment.Results showed that the maximum adsorption amounts of Cu^2+by Fe-Al binary oxide at 25℃were 149.08 mg·g^-1.The maximum adsorption capacity of Cu^2+reduced to 28.81 mg·g^-1 when Pb^2+was introduced into the solution.In the range of pH 3~7,adsorption amount of Cu^2+by Fe-Al binary oxide increased with solution pH increasing.Cu^2+adsorption kinetics on Fe-Al binary oxides was in accordance with the Elovich equation,and the adsorption capacity reached the adsorption equilibrium at about 120 min.

关 键 词：铁铝复合氧化物 铜 铅 吸咐 

分 类 号：P579[天文地球—矿物学]