裙带菜吸附水溶液中镍离子的特性及吸附平衡模型  

ADSORPTION CHARACTERISTICS OF UNDARIA PINNATIFIDA AGAINST NI2+ IN AQUEOUS SOLUTION

作　　者：王文华[1,2] 冯咏梅[3] 刘夫锋[1] 常秀莲[3] 孙彦[1] 

机构地区：[1]天津大学化工学院生物化工系 [2]烟台大学化学生物理工学院,山东烟台264005 [3]烟台大学化学生物理工学院

出　　处：《水处理技术》2005年第4期14-16,共3页Technology of Water Treatment

基　　金：山东省教育厅科研基金资助项目(C01J12)

摘　　要：本文实验研究了裙带菜对废水中重金属镍离子的吸附特性和吸附平衡模型。实验表明裙带菜对镍离子的吸附能力最高达0.76m m ol/g(干裙带菜)。在恒定pH条件下,Langm uir方程可用来描述吸附容量与平衡浓度的关系。但吸附容量受溶液pH值影响很大,在pH2.0～6.0范围内p,H值越低吸附量越小,pH在5.5～6.0时有较大吸附容量。竞争吸附模型可以很好地描述溶液中pH值和离子浓度对吸附的影响,可以预测再生条件。The adsorption characteristics of Undaria pinnatifida against heavy metal Ni2+ and the adsorption equilibrium model were expeimentally studied. The experimental results showed that the adsorption ability of undaria pinnatifida against Ni2+ was as high as 0.76m mol/g (dry ulopteryx pinnatifida). Under the condition of constant pH value, the Langmuir equation can be used to describe the relationship between adsorption capacity and equilibrium concentration, but adsorption capacity is greatly affected by pH values in solution; within pH=2.0~6.0, the lower the pH value, the smaller the adsorption quantity; when pH is within 5.5~6.0, there is greater adsorption capacity. The competition adsorption model can better describe the influence of pH value and ion concentration on adsorption and predict the regeneration conditions.

关 键 词：平衡模型 裙带菜 镍离子 LANGMUIR方程 水溶液 吸附容量 溶液PH值 吸附特性 实验研究 吸附能力 平衡浓度 离子浓度 吸附模型 再生条件 重金属 pH2 吸附量 废水 

分 类 号：X703[环境科学与工程—环境工程] O224[理学—运筹学与控制论]