茶叶对氟的吸附研究  

Study on the Adsorption of Fluorine by Tea

作　　者：田奇峰[1] 孙杰[1] 

机构地区：[1]中南民族大学环境工程研究所,湖北武汉430074

出　　处：《化学与生物工程》2011年第4期29-31,共3页Chemistry & Bioengineering

基　　金：国家自然科学基金资助项目(21007018);湖北省自然科学基金资助项目(2008CDB400);武汉市科学技术计划项目(201051824567)

摘　　要：以茶叶为吸附材料,研究了改性前后的茶叶对氟的吸附,探讨了氟化钠模拟废水溶液的pH值、初始浓度及吸附时间对吸附效果的影响,同时,对改性前后的茶叶进行吸附动力学拟合和吸附等温线拟合。结果表明,在pH值为4、茶叶投加量为1.0 g、室温条件下,改性前后的茶叶对50 mL 0.1 mol.L-1氟化钠模拟废水中氟的最大吸附量分别为4.67 mg.g-11、9.96 mg.g-1,且改性后茶叶的吸附平衡时间大幅缩短,吸附过程符合拟一级动力学方程,吸附等温线符合Langmuir吸附模式。In this paper,the adsorption of fluorine by tea and modified tea had been studied.Influences such as pH value and initial concentration of NaF simulation wastewater,adsorption time on adsorption efficiency were investigated.The adsorption isothermal curve and kinetic equation were simulated to illustrate the adsorption effect.The results indicated that for 50 mL wastewater containing 0.1 mol·L-1 NaF,the maximum adsorption capacity before and after modification were 4.67 mg·g-1 and 19.96 mg·g-1,respectively at room temperature under the optimum conditions of pH value 4,tea adding amount 1.0 g.In addition,the adsorption speed was enhanced obviously after modification.The adsorption isotherms were all consistent with Langmuir adsorption mode and the adsorption processes fit the first-order kinetics well.

关 键 词：茶叶 氟 改性 吸附 

分 类 号：X703[环境科学与工程—环境工程] O647.33[理学—物理化学]