天祝褐煤腐植酸对Cr^(6+)吸附性能研究  

ADSORPTION PERFORMANCE OF LIGNITE HUMID ACID FROM TIANZHU FOR Cr^(6+)

作　　者：李静萍[1] 陈峰[2] 王晓强[1] 郑李纯[1] 王冠[1] 

机构地区：[1]兰州交通大学化学与生物工程学院,兰州730070 [2]华北制药集团新药研究开发有限责任公司,石家庄050015

出　　处：《离子交换与吸附》2011年第5期460-467,共8页Ion Exchange and Adsorption

基　　金：甘肃省科技计划和甘肃省建设科技攻关项目(批准号:1010RJZA073;JK2010-31)

摘　　要：通过分析天祝褐煤腐植酸吸附重金属Cr6+前后的红外光谱、荧光强度的变化,进行其对重金属离子Cr6+的吸附性能及机理研究。结果表明,在室温条件下(20~25℃),吸附最佳pH=5、吸附平衡时间约为12h,符合Freundlich吸附模型,相关系数R=0.9933,特性常数n为2.3820。腐植酸对Cr6+有较好的吸附性能,其吸附过程可用Ho准二级反应动力学模型描述。The infrared spectrum and fluorescence intensity of lignite humic acid from Tianzhu and the change of the spectrum after adsorption of heavy metal ion Cr^6＋ have been analyzed by FTIR and FR. The property and mechanism of the adsorption for heavy metal ion Cr^6＋ have been studied. The result shows that under the conditions of room temperature （20-25℃）, optimum pH value is 5, equilibrium time is about 12 hours, the adsorption corresponds to Freundlich adsorption model. The correlation coefficient R=0.9933, characteristic constant n=2.3820. Humic acid has good adsorption performance for Cr^6＋. The adsorption process can be described by Ho pseudo second order dynamic model.

关 键 词：腐植酸 吸附 Cr6+ 吸附机理 

分 类 号：TQ424.3[化学工程]