介孔氧化铝吸附锌离子的研究  

Research on adsorption of zinc ion using organized mesoporous alumina

作　　者：汤志松[1] 曹振宇[2] 林爱军[2] 郭奋[1] 

机构地区：[1]北京化工大学纳米材料先进制备技术与应用科学教育部重点实验室,北京100029 [2]北京化工大学化学工程学院,北京100029

出　　处：《北京化工大学学报（自然科学版）》2013年第B12期1-5,共5页Journal of Beijing University of Chemical Technology(Natural Science Edition)

摘　　要：本文将超重力技术制备的比表面积高、孔径分布窄的介孔氧化铝用于吸附污水中的Zn2,考察了吸附剂用量、pH值、温度、Zn2初始质量浓度和吸附时间等因素对吸附效果的影响.结果表明,对于初始质量浓度20 mg/L的Zn2＋溶液,介孔氧化铝最优吸附条件为吸附剂用量1.2g/L、pH5.0、温度25℃.在Zn2吸附中,超重力法介孔氧化铝对Zn的吸附率比对比吸附材料提高了l～2倍.吸附过程与准二级动力学速率方程和Langmuir吸附等温线模型拟合较好,为单分子层的化学吸附过程.In this study,the mesoporous alumina synthesized via high gravity technology with high surface area and narrow pore size distribution was used as adsorbent for elimination of zinc ion from waste water.The effect of the dosage of absorbent,pH value,temperature,initial concentration of Zn2＋ and adsorption time on adsorption were investigated,respectively.The results indicated that with the dosage of adsorbent of 1.2 g/L,pH value of 5.0,temperature of 25 ℃,the best adsorption performance was obtained for the solution with the initial Zn2 ＋ concentra-tion of 20 mg/L.For Zn2＋ adsorption,the adsorption ratio using mesoporous alumina synthesized via high gravity technology was 1 to 2 times higher than traditional adsorptive materials.The adsorption kinetics could be described using quasi second-order kinetic model and Langmuir equation.The adsorption was a chemical monolayer process.

关 键 词：介孔氧化铝 锌离子 吸附 

分 类 号：TQ133.1[化学工程—无机化工]