累托石/腐殖酸微球对水中蒽的吸附  

Adsorption of Anthracene in Water with Rectorite/Humic Acid Microspheres

作　　者：唐玉斌[1] 陈兆银[1] 陈芳艳[1] 郁昉[1] 

机构地区：[1]江苏科技大学生物与环境工程学院,江苏镇江212018

出　　处：《净水技术》2010年第4期60-64,共5页Water Purification Technology

基　　金：江苏省高校自然科学基础研究项目资助(08KJB610002)

摘　　要：采用累托石、腐殖酸、聚乙烯醇、海藻酸钠和氯化钙等材料制备微球状吸附剂去除水中多环芳烃蒽。考察了微球用量、蒽溶液初始浓度、吸附时间等因素对吸附效果的影响,测定了吸附等温线,采用Freundlich、Langmuir模式对等温吸附规律作了数学模拟,对吸附动力学及吸附机理进行了探讨。结果表明:在该研究条件下,微球用量、溶液初始浓度、吸附时间等因素对水中蒽的吸附效果有显著性影响。最优吸附条件为:微球用量=5 g/50 mL,初始浓度=10 mg/L,吸附时间=14 h。累托石/腐殖酸微球对水中蒽的等温吸附规律符合Freundlich和Langmuir模型,吸附动力学过程可用准一级、准二级动力学模式和双常数方程较好地模拟。吸附是靠微球与蒽的分子间作用力来实现的。Rectorite, humic acid, polyvinyl alcohol, sodium alginate and calcium chloride were used to prepare microspheres adsor- bent to remove anthracene from solutions. The effect of the microspheres dosage, initial concentration of anthracene solution and adsorption time on adsorption efficiency were investigated, ard isothermal adsorption curve was determined. The mathematical models of Freundlich and Langmuir were studied using linear function of isothermal adsorption. Adsorption kinetics and mechanism were dis- cussed, too. The results show that microspheres dosage and initial concentration of anthracene solution and adsorption time have re- markable influence over adsorption efficiency, respectively. The optimum adsorption conditions are as follows： mierospheres dosage is 5 g/50 mL; adsorption time is 14 h; initial concentration of anthracene solution is 10 mg/L. The law of isothermal adsorption can be described by Freundlich and Langmuir models. The adsorption kinetics conforms to pseudo first-order, pseudo-second-order and double-constant equations. The adsorption is taken effect by molecular interaction between the microsphere and anthracene.

关 键 词：腐殖酸 累托石 微球 吸附机理 蒽 

分 类 号：X703[环境科学与工程—环境工程]