钙基膨润土对水相中铜离子的吸附  

Adsorption of Cu^(2+) by Ca-Bentonite in Wastewater

作　　者：朱一民[1] 王忠安[1] 苏秀娟[1] 魏德洲[1] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2006年第1期99-102,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50174014);辽宁省自然科学基金资助项目(20022025)

摘　　要：通过考察吸附条件对吸附率及吸附负载量的影响,研究了钙基膨润土对水相中铜离子的吸附特性.实验结果表明,钙基膨润土对铜离子有较好的吸附效果;钙基膨润土对铜离子的吸附在15 min就达到吸附平衡;铜离子的吸附在15 min就达到吸附平衡;当铜离子初始质量浓度为190.6 mg/L,pH=6.03,t=20℃,吸附时间τ=15 min,吸附剂用量为10 g/L时,膨润土对铜离子的吸附率为94%.对初始质量浓度为635.4 mg/L的铜离子溶液,膨润土对铜离子的吸附率仍达57%.从吸附前后膨润土的扫描电镜图片和X射线衍射图谱对比分析可知,膨润土对铜离子的吸附不仅有表面和孔道吸附,还存在着晶层间吸附.The adsorption of copper ions by Ca-bentonite in wastewater was investigated experimentally. The results indicated that such a biosorbent has favorable adsorbing effect on copper ions, and the adsorption equilibrium comes about within 15 minutes. When the dose of Ca-bentonite is 10 g/L with the concentration of Cu^2＋ up to 190.6 g/L the biosorbing rate is 94.0%, while the concentration of Cu^2＋ up to 635.4 g/L the biosorbing rate is 57.0%. The XRD analysis shows that the process of copper ions by Ca-bentonite indicates not only the surface and pore adsorption but also the crystal-interlarnination adsorption by the bentonite.

关 键 词：钙基膨润土 铜离子 吸附 水处理 重金属 

分 类 号：Q939.5[生物学—微生物学]