凹土在不同条件下改性后对Cr6+吸附性能的研究  

ADSORPTION PROPERTIES OF ATTAPULGITE CLAY ON CR6+MODIFIED UNDER DIFFERENT CONDITIONS

作　　者：白娟[1] 张天亚 BAI Juan;ZHANG Tian-ya(College of Pharmacy,Anhui Xinhua University,Hefei,Anhui 230088,China)

机构地区：[1]安徽新华学院药学院,安徽合肥230088

出　　处：《井冈山大学学报（自然科学版）》2020年第4期33-37,共5页Journal of Jinggangshan University (Natural Science)

基　　金：安徽省教育厅自然科学研究重点项目(KJ2019A0873);安徽省教育厅“六卓越、一拔尖”卓越人才培养创新项目(2018zygc082);安徽省教育厅基层教研室示范项目(2019jyssfx02)。

摘　　要：通过采用不同的处理方法制备改性凹土,并研究改性后的凹土对Cr^6+的吸附率。在凹土进行酸洗和活化的预处理之后,采用十八烷基三甲基溴化铵(以下简称OTMAB)对凹土用不同的处理方法进行改性。用改性后的凹土吸附Cr^6+,并采用二苯碳酰二肼分光光度法测定吸附率。实验结果表明,随着OTMAB用量的增加改性凹土对Cr^6+的吸附率先增大后减小,不同的溶剂,最大吸附率处的OTMAB用量不一致。实验最后用X射线衍射仪和扫描电镜对每种处理方法中吸附效果较好的凹土及原土进行了表征。Modified attapulgite clay was prepared by different treatment methods,and its adsorption rate on Cr^6+ was studied.After acid picking and reaction,attapulgite clay was modified with octadecy trimethyl ammonium bromide(OTMAB).The adsorption rate of modified attapulgite clay on Cr^6+ was tested by diphenylcarbazide spectrophotometry.The results showed that the adsorption rate of the modified attapulgite clay on Cr^6+ increased first and then decreased with the increase of the amount of OTMAB.The amount of OTMAB at the maximum adsorption rate varied with different solvents.At the end of the experiment,the attapulgite clay and the modified attapulgite clay having better adsorption effect were characterized by X-ray diffractometer and scanning electron microscope.

关 键 词：凹土 改性 吸附率 CR^6+ 

分 类 号：TQ630.4[化学工程—精细化工]