松树锯末对Cu^(2+)的吸附研究  

Adsorption of Cu^(2+) by Sawdust

作　　者：孙杰[1] 田奇峰[1] 黄浸 

机构地区：[1]中南民族大学环境工程研究所,湖北武汉430074 [2]宜昌市西陵区夷陵中学,湖北宜昌443000

出　　处：《环境科学与技术》2011年第11期88-90,146,共4页Environmental Science & Technology

基　　金：国家自然科学基金项目资助(21007018);湖北省自然科学基金项目资助(2008CDB400);武汉市科技计划项目(201051824567)

摘　　要：文章采用松树锯末以及柠檬酸钠改性锯末为吸附材料,以Cu2+为吸附对象,研究了溶液的pH值,吸附时间,锯末投加量及模拟废水初始浓度对吸附效果的影响,研究结果表明在最佳条件下改性前后的锯末对Cu2+的最大吸附量分别为3.31 mg/g、5.75 mg/g,最大除去率分别达到84.3%和92.3%。同时对改性前后的锯末做了吸附等温线拟合及动力学研究,结果表明吸附等温线均能很好的符合Langmuir或Freundlich吸附模式,吸附过程符合拟二级动力学方程。Adsorption of copper（Ⅱ） by sawdust（SD） and modified sawdust（MSD） were investigated.Influences were studied including pH value of aqueous solution,adsorption time and initial concentration of copper（Ⅱ）.Results indicated that the equilibrium capacities were 3.31 mg/g and 5.75 mg/g,the removal efficiency were 84.3% and 92.3% before and after modification respectively at room temperature and best conditions.Adsorption isothermal curve and kinetic equation were simulated to illustrate the adsorption effect.It was found that the adsorption isotherms were all consonant with Langmuir or Freundlich model,and the adsorption process fit second-order kinetics well.

关 键 词：树锯末 Cu(Ⅱ) 改性 吸附 

分 类 号：X703[环境科学与工程—环境工程]