电气石去除常温废水中Cu^(2+)的试验研究

Experimental Study On Removal of Cu^(2+) From Normal Temperature Wastewater by Tourmaline

研究了电气石对酸性废水中Cu^(2+)的吸附作用。考察了试验配水的初始pH值、吸附时间、Cu^(2+)起始浓度等对电气石去除Cu^(2+)的影响。结果表明:电气石能有效地从酸性废水中去除Cu^(2+)吸附速率快,去除率较高。温度为25℃,废水初始pH值为4.0时,采用朗缪尔吸附等温式计算出电气石对Cu^(2+)的最大吸附量为2.49 mg/g。准二级模型较好地拟合了电气石吸附Cu^(2+)的动力学数据。电气石吸附Cu^(2+)过程中存在物理吸附和化学吸附。为今后电气石在酸性重金属废水方面研究及应用提供依据。

The adsorption effect of tourmaline on Cu^2＋ in acidic wastewater was studied in the paper. The effects of initial pH value, adsorption time and Cu^2＋ initial concentration on the removal of Cu^2＋ by tourmaline were studied. The results showed that the adsorption rate of Cu^2＋ was faster and the removal rate was higher. When the temperature is 25℃ and the initial pH value of waster is 4.0, the maximum adsorption capacity of tourmaline to Cu^2＋ is calculated by using Langmuir adsorption isotherm, which is 2.49 mg/L. The quasi-two-order model can well fit the kinetic data of tourmaline adsorption Cu^2＋. There are physical adsorption and chemical adsorption in the adsorption process of Cu^2＋. It provides the basis for the research and aoolication of tourmaline in acid heavy metal wastewater.