锂盐改性累托石处理染料废水  

Dye wastewater treatment by rectorite modified by lithium

作　　者：马文梅[1] 王营茹[1] 明银安[1] 廖金阳[1] 李丽荣[1] 

机构地区：[1]武汉工程大学环境与城市建设学院,湖北武汉430074

出　　处：《武汉工程大学学报》2012年第2期19-23,共5页Journal of Wuhan Institute of Technology

基　　金：武汉工程大学校长基金重点项目(2011079)

摘　　要：采用锂盐对累托石进行改性,研究其最佳改性条件及吸附亚甲基蓝的热力学和动力学规律.以碳酸锂为改性剂,碳酸锂与草酸用量比为0.8∶1,试验出改性的最佳条件为:碳酸锂与累托石质量比为5%,固液比为1∶20,改性时间为3 h.改性后累托石对亚甲基蓝溶液的吸附性能明显优于未改性的累托石,吸附量提高了65%;热力学和动力学探究表明,改性累托石对亚甲基蓝的吸附过程符合Langmuir规律,动力学符合Lagergren准二级动力学规律.Experiment was done to modify rectorite by lithium.Study was made on the best modifying conditions and adsorption principle of thermodynamics and dynamics for methylene blue trihydrate,which was an innovation for modifying of rectorite,and could give a new push to application in environment engineering.With lithium carbonate as modifying thing and the dosage ratio of lithium carbonate to oxalic acid being 0.8 to 1,many experiments were done to make out the best modifying conditions of rectorite,the mass ratio of lithium carbonate to rectorite was 5 percent,the ratio of solid to liquid was 1 to 20,the modifying time was 3 hours.Rectorite modified by lithium（Rec-Li） had better adsorption capability than original rectorite in evidence,and the adsorption quantity of Rec-Li had been raised 65 percent for methylene blue trihydrate.Study on thermodynamics and dynamics shows that isothermal adsorption law of Rec-Li for methylene blue trihydrate can well be described by Langmuir model,and adsorption kinetics law conforms to the fitting of Lagergren second order equation.

关 键 词：碳酸锂 改性 累托石 亚甲基蓝 热力学 动力学 

分 类 号：X703[环境科学与工程—环境工程]