草鱼鱼鳞对对苯二酚的吸附特性及其机理  

Adsorption Characteristics and Mechanism of Grass Carp Scales towards Hydroquinone

作　　者：熊进[1] 汪海波[1] 欧其语[2] 李彦[2] 刘良忠[1] 张寒俊[2] 

机构地区：[1]武汉工业学院食品科学与工程学院,湖北武汉430023 [2]武汉工业学院化学与环境工程学院,湖北武汉430023

出　　处：《食品科学》2011年第21期118-122,共5页Food Science

基　　金：湖北省自然科学基金重点项目(2009CDA11);武汉市农副资源循环利用与新产品开发工程技术中心资助项目(201120637175);武汉工业学院研究生创新计划项目(2010cx002)

摘　　要：以草鱼鱼鳞为原料制备生物吸附剂,通过静态吸附实验研究其对水溶液中对苯二酚的吸附性能,系统地考察pH值、吸附剂用量、对苯二酚初始质量浓度、吸附时间、吸附温度对鱼鳞吸附效果的影响,并通过吸附动力学和热力学分析,探讨鱼鳞吸附对苯二酚的吸附机理。结果表明,鱼鳞吸附剂对对苯二酚具良好的吸附效果,其最佳吸附条件为:当温度为25℃、吸附剂用量0.5g/L、对苯二酚溶液初始质量浓度为100mg/L、溶液体系pH7、吸附时间8h时,鱼鳞吸附剂的吸附容量可达到76.71mg/g。吸附热力学和动力学分析表明,鱼鳞对对苯二酚的吸附是以物理吸附为主的多层吸附,准二级动力学模型可以较好地反映这种吸附动力学行为,Freundlich等温吸附方程能较好地描述其等温吸附行为。In the present study,grass carp scales were used to remove hydroquinone from aqueous solutions under different experimental conditions.The effects of pH,adsorbent dose,adsorption time,adsorption temperature and initial hydroquinone concentration on adsorption efficiency were systematically investigated to explore the optimal conditions for the removal of hydroquinone.Meanwhile,its adsorption mechanism was also elucidated.The results showed that the adsorbent grass scrap scales revealed good adsorption capacity towards hydroquinone and the optimal adsorption conditions were pH 7,25 ℃ adsorption temperature,0.5 g/L adsorbent dose,100 mg/L initial hydroquinone concentration and 8 h adsorption time.Under the optimal adsorption conditions,the adsorption amount of hydroquinone was 76.71 mg/g.Further,kinetic and thermodynamic analyses indicated that the adsorption of hydroquinone by grass carp scales was mostly a physical adsorption process,which was a multilayer adsorption and fitted well with a pseudo-second order kinetic model.Moreover,the Freundlich isotherm model could well describe the isothermal adsorption of hydroquinone onto grass carp scales.

关 键 词：鱼鳞 对苯二酚 吸附 动力学 热力学 

分 类 号：S965.112[农业科学—水产养殖] TS254.9[农业科学—水产科学]