Fe-Al复合柱撑剂制备及对丁基黄药的吸附行为  

Study on preparation of Fe-Al composite column brace and adsorption behavior of butyl xanthate

作　　者：李彩霞[1] 李俊 郑忠宇 LI Cai-xia;LI Jun;ZHENG Zhong-yu(College of Mining,Liaoning Technical University,Fuxin 123000,China;Shenyang Research Institute of Coal Science Group Co.Ltd,Fushun 113122,China)

机构地区：[1]辽宁工程技术大学矿业学院,辽宁阜新123000 [2]煤科集团沈阳研究院有限公司,辽宁抚顺113122

出　　处：《矿物学报》2022年第2期231-238,共8页Acta Mineralogica Sinica

基　　金：国家自然科学基金项目(编号:51404133)。

摘　　要：由于蒙脱石独特的层状结构和离子交换能力,使其在污水治理领域具有良好的应用前景。本文使用共聚法制备Fe-Al复合柱撑蒙脱石(Fe-Al-MT),采用XRD、比表面积孔径分析仪和SEM等进行表征分析,并探究了Fe-Al-MT对选矿废水中丁基黄药的吸附效果。试验结果表明,当Fe-Al复合柱撑蒙脱石中n(Fe^(3+))/n(Al^(3+))=1﹕5时,Fe-Al-MT的层间距达到1.913nm,比表面积为226.65m^(2)/g,柱撑效果最佳。在Fe-Al-MT用量为6g/L,温度为40℃,p H=5的条件下,Fe-Al-MT对丁基黄药的去除率最高达到84.16%。根据Fe-Al-MT对丁基黄药的吸附作用研究表明该反应更符合Langmuir等温线模型,表明吸附过程属于单分子吸附。吸附动力学分析表明该吸附过程主要以化学吸附为主,符合二级动力学。Using the unique layered structure and ion exchange capacity of montmorillonite,it has good application prospects in sewage treatment and other fields.In this paper,the Fe-Al composite pillared montmorillonite(Fe-Al-MT)was prepared by the substitution method,and XRD,specific surface area pore size analyzer and SEM were used for characterization test.The adsorption effect of Fe-Al-MT on butyl xanthate in mineral processing wastewater was also investigated.The results show that when n(Fe^(3+))/n(Al^(3+))=1:5 in Fe-Al composite pillared montmorillonite,the Fe-Al-MTlayer spacing reaches 1.913 nm,the specific surface area is 226.65 m^(2)/g,and the pillaring effect is significant.Under the conditions of Fe-Al-MT dosage of 8 g/L,temperature of 40℃and p H=5,the removal rate of Fe-Al-MT to butyl xanthate was 84.16%.According to the study of Fe-Al-MT on the adsorption of butyl xanthate,the reaction is more consistent with the Langmuir isotherm model,and the adsorption process is a single molecule adsorption.The analysis of adsorption kinetics shows that the adsorption process is mainly chemical adsorption,which conforms to the second-order kinetics.

关 键 词：蒙脱石 柱撑 吸附动力 丁基黄药 

分 类 号：P579[天文地球—矿物学] TD985[天文地球—地质学]