磁性活性炭处理含铜废水

Treatment of Cu(Ⅱ)-wastewater by magnetic activated carbon

利用自制磁性活性炭对水中Cu(Ⅱ)的去除进行静态吸附研究,考察了吸附时间、Cu(Ⅱ)初始浓度以及磁性活性炭投加量对铜离子去除率的影响。结果表明,磁性活性炭投加量为3 g/L时,对铜离子的去除率达92.6%;磁性活性炭对铜离子的吸附在最初的20 min是一个快速吸附,去除率达到总去除率的90%以上;随着Cu(Ⅱ)初始浓度的增大,Cu(Ⅱ)的去除率逐渐减小,磁性活性炭吸附铜离子可用Langmuir吸附等温式和Freundlich方程描述;利用磁铁对溶液中磁性活性炭进行回收,回收率达到87%。

Adsorption of Cu（Ⅱ） on magnetic activated carbon from wastewater was researched under the condition of static state.Effects of contact time,the initial Cu（Ⅱ） concentration of solution,and the dosage of magnetic activated carbon on the removal rate of Cu（Ⅱ） were investigated.The results show that the magnetic activated carbon has better removal efficiency to Cu（Ⅱ）,and the removal rate is 92.6% when the dosage of magnetic activated carbon is 3 g/L.The adsorption is rapid at the initial 20 minutes,and the removal rate is over 90%.The removal rate of Cu（Ⅱ） decreases with the increase of the initial concentration of Cu（Ⅱ）.The adsorption process of Cu（Ⅱ） on magnetic activated carbon could be represented by Langmuir isotherm equation and Freundlich equation.The magnetic activated carbon could be recovered by magnet,and the recovery is 87%.