生物吸附-磁分离法处理含Pd(II)/Al(III)的废液  

Treatment of wastewater containing Pd(II) and Al(III) by biosorption-magnetic separation method

作　　者：宋慧平[1] 李鑫钢[1,2] 孙津生[1,2] 武振华[2] 

机构地区：[1]天津大学化工学院,天津300072 [2]天津大学精馏技术国家工程研究中心,天津300072

出　　处：《化学工程》2008年第10期5-8,共4页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(20206024);天津市自然科学基金资助项目(07JCYBJC06800)

摘　　要：为了探索处理含Pd2+和Al3+废液的新工艺,以趋磁细菌(MTB)作为生物吸附剂进行了吸附及分离实验研究。结果表明,MTB对Pd2+和Al3+具有很好的吸附效果,并且在Pd-Al二元体系中对Pd2+具有独特的优先吸附性。MTB对Pd2+和Al3+的吸附等温线和吸附动力学曲线分别遵循Langmuir吸附模型和拟二阶动力学模型。磁分离实验结果表明,随着磁场强度的增加,分离效果提高的同时,分离速率也显著提高。经生物吸附-磁分离法复合工艺处理后的出水中Pd2+和Al3+的质量浓度分别为0.014 mg/L和0.213 mg/L。To study the new process, the magnetotactic bacteria （MTB） as biosorbent of Pd^2＋ and Al^3＋ from waste solution was investigated in both single and binary systems. Competitive biosorption on MTB from the Pd-Al system displayed a unique phenomenon that the adsorption of Pd^2＋ was reinforced and that of Al^3＋ was prohibited, compared respectively with their performance in the single metal system. The Langmuir model and the pseudo second-order kinetic model fitted the equilibrium isotherms and kinetic data with high correlation coefficient. The magnetic separation result shows that the separation efficiency and speed are improved with the increasing of magnetic field intensity. After the biosorption-magnetic separation, the mass concentrations of Pd^2＋ and Al^3＋ in the liquid decreased to 0.014 mg/L and 0.213 mg/L, respectively.

关 键 词：生物吸附 钯 铝 磁分离 

分 类 号：X703[环境科学与工程—环境工程]