竹炭对废水中Cu^(2+)的吸附

Adsorption of Cu^(2+) in Wastewater on Bamboo Charcoal

探讨了竹炭粒径、加入量、溶液pH、吸附时间、Cu^(2+)初始质量浓度等因素对竹炭吸附Cu^(2+)效果的影响。实验结果表明:竹炭对废水中Cu^(2+)有很好的吸附效果,当竹炭粒径小于0.15 mm、加入量为16g/L、溶液pH为6.0、Cu^(2+)初始质量浓度25 mg/L、吸附时间为1.5 h时,竹炭对Cu^(2+)的去除率为98.3%;竹炭对Cu^(2+)的吸附可以很好地符合Langmuir和Freundlich等温吸附模型,通过Langmuir模型的线性拟合,计算得出最大吸附量为17.86mg/g。

The effects of bamboo charcoal size, bamboo charcoal dosage, solution pH, adsorption time and Cu^2＋ initial mass concentration on Cu^2＋ adsorption were studied. The experimental results show that： The bamboo charcoal has good adsorption effect to Cu^2＋ in wastewater, and when the bamboo charcoal size is less than 0.15 mm, the bamboo charcoal dosage is 16 g/L, the solution pH is 6.0, the Cu^2＋ initial mass concentration is 25 mg/L and the adsorption time is 1.5 b, the removal rate of Cu^2＋ is 98.3%; The Cu^2＋ adsorption on bamboo charcoal accords with Langmuir and Freundlich adsorption isotherm models. The maximum adsorption capacity calculated by Langmuir equation is 17.86 mg/g.