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.
出处
《水处理技术》
CAS
CSCD
北大核心
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)
