摘要
利用硅藻土、γ-氧化铝、5A分子筛吸附二价铜,考察了时间 pH 初始浓度、硫酸钠对吸附效果的影响,结果表明:吸附平衡时间分别为240,480,180min;最大吸附量分别为2.64,22.88,98.04mg/g;吸附动力学均符合Lagergren二级速率方程;硅藻土、γ-氧化铝的吸附等温线符合Freundlich方程;5A分子筛的吸附等温线符合Langmuir模型;提高pH有利于吸附。随着Na2SO4浓度的上升,硅藻土对Cu2+的吸附量上升,γ-氧化铝下降,5A分子筛基本不变。
Diatomite,γ-Alumina and 5A molecular sieve are used to adsorpt Cu(Ⅱ). The effect of time,pH, original concentrations of Na_(2)SO_(4) on the adsorption are inspected. The results indicate that adsorption equilibrium is reached within 240,480,180 min respectively, and the maximum adsorption quantity is 2.64,22.88,(98.04 mg/g) respectively.The adsorption kinetic can be described by the Lagergren pseudo-second order rate equation.Adsorption isotherms of 5A molecular sieve for Cu(Ⅱ) obey the langmuir equation and adsorption isotherms of diatomite,γ-Alumina for Cu(Ⅱ) obey the Freundlich equation. The adsorption amount of Cu(Ⅱ) increases with a rise of pH.The increase of sodium sulfate concentration is beneficial to adsorption of Cu(Ⅱ) for diatomite and disadvantage for γ-Alumina, but have no effect on adsorption of 5A molecular sieve.
出处
《无机盐工业》
CAS
2004年第5期21-23,共3页
Inorganic Chemicals Industry
基金
四川省教育厅重点资助项目(LCA-007)
