膨润土吸附水中Cr(Ⅵ)的实验研究  

Removal of chromium cation from aqueous solution with modified bentonite

作　　者：丁述理[1] 孟庆梅[2] 孙晨光[1] 季刚 杨翠娜[1] 

机构地区：[1]河北工程大学河北省资源勘查研究重点实验室,河北邯郸056038 [2]山东理工大学资源与环境工程学院,山东淄博255049 [3]济南市历城区环保局,山东济南250100

出　　处：《化工矿物与加工》2006年第11期11-14,共4页Industrial Minerals & Processing

基　　金：河北省自然科学基金(D2004000463);河北省科技攻关项目(05547009D-2)资助。

摘　　要：研究了钠化膨润土对Cr6+的吸附行为,考察了溶液中Cr6+的初始质量浓度、吸附剂用量、pH、搅拌时间、温度、粒度等因素对膨润土吸附的影响。结果表明,钠化膨润土对于Cr6+的吸附在1h基本达到吸附平衡,吸附量随溶液pH的增大、温度的升高、膨润土粒度的增加以及溶液中Cr6+的初始质量浓度的增高而降低。在混合体系中,共存离子的存在影响金属离子的吸附效率,共存离子的质量浓度与Cr6+相近时,对Cr6+的吸附效果影响很大,其中,Zn2+的影响大于Pb2+;共存离子的质量浓度远大于Cr6+时,Zn2+基本没有影响,Pb2+却能提高对Cr6+的吸附效率。The adsorption capacity of sodiumized bentonite on Cr^6＋ in aqueous solution was studied. The influences of initial concentrate of Cr^6＋ in aqueous solution, adsorbent quantity, pH value, stirring time, temperature, and size on adsorption capacity of bentonite were researched. The results showed that the adsorption of sodiumized bentonite on Cr^6＋ in aqueous solution would reach balance after 1 hour. Amount of adsorption would decrease as pH value of the solution, temperature, size of bentonite, and initial concentrate of Cr^6＋ in aqueous solution increased. The adsorption efficiency of mental ion was influenced by co-existing ions in complex system. When the concentrate of co-existing ion was closed to the concentrate of Cr^6＋, the influence of co-existing ion on Cr^6＋ adsorption effect was big. When the concentrate of co-existing ion was far in excess of the concentrate of Cr^6＋, the influence of Zn^2＋ on Cr^6＋ adsorption effect was closed to zero, but the adsorption efficiency of Pb^2＋ on Cr^6＋ was increased.

关 键 词：吸附 CR^6+ 膨润土 重金属 

分 类 号：TD985[矿业工程—选矿]