4种胺基改性甘蔗渣对Cu^2+的静态吸附  

Static Adsorption of Cu^2+ Using Bagasse Modified by Four Kinds of Amine

作　　者：汪景 汪燚 董双凤 余军霞 池汝安 李红霞 WANG Jing;WANG Yi;DONG Shuangfeng;YU Junxia;CHI Ru’an;LI Hongxia(School of Chemistry and Environmental Engineering,Wuhan Institute of Technology,Key Laboratory of Green Chemical Processes of Ministry of Education,Wuhan 430074,China)

机构地区：[1]武汉工程大学化学与环境工程学院,绿色化工过程教育部重点实验室,湖北武汉430205

出　　处：《武汉工程大学学报》2020年第6期591-596,共6页Journal of Wuhan Institute of Technology

基　　金：国家自然科学基金(21978226);湖北省教育厅创新团队项目(T201506);武汉工程大学校长基金(CX2019187)。

摘　　要：采用两步法制备了乙二胺(EDA)、二乙烯三胺(DETA)、三乙烯四胺(TETA)、四乙烯五胺(TEPA)系列胺基改性甘蔗渣(SCB)吸附剂,探讨了浓度、吸附时间、酸度和共存离子对四种吸附剂吸附Cu^2+的影响。结果表明四种胺基改性吸附剂对铜离子的吸附等温线符合Langmuir模型,吸附可在1 h内达到平衡,动力学过程符合伪二级动力学模型,吸附最佳酸度范围为4.5~5.5。4种胺基改性甘蔗渣吸附剂对Cu^2+的吸附容量大小的顺序为:DETA-SCB>TEPA-SCB>TETA-SCB>EDA-SCB,对Cu^2+选择性顺序为:EDA-SCB>DETA-SCB>TETA-SCB>TEPA-SCB。共存干扰离子对Cu^2+吸附容量影响的大小顺序:Zn^2+>Cd^2+>Ca^2+≈Mg^2+>K^+≈Na^+。Ethylenediamine(EDA),diethylenetriamine(DETA),triethylenetetramine(TETA),and tetraethylenepentamine(TEPA)modified bagasse(SCB)were prepared through two-steps method,and their adsorption performance including isotherm,kinetic,pH and co-ions effect were investigated.Results showed that adsorption isotherms of Cu^2+ on EDA-SCB,DETA-SCB,TETA-SCB,and TEPA-SCB fits Langmuir model,and the adsorption can finish within 1 h.The optimum pH values for Cu^2+ adsorption on the four modified SCBs range from 4.5 to 5.5.Adsorption capacity of the four modified SCBs follows the order of DETA-SCB>TEPA-SCB>TETA-SCB>EDA-SCB,while adsorption selectivity follows the order of EDA-SCB>DETA-SCB>TETA-SCB>TEPA-SCB.

关 键 词：生物吸附剂 甘蔗渣 改性 吸附 CU^2+ 

分 类 号：X71[环境科学与工程—环境工程] G642.423[文化科学—高等教育学]