改进铁氧体共沉淀法去除污泥浸出液中的铜锌

Removal of Cupper and Zinc from Sludge Extract by Improved Ferrite Coprecipitation Process

采用改进铁氧体共沉淀法,用石灰乳溶液作中和剂,从污泥浸出液中去除铜、锌。实验结果表明,在混合液pH为8.9、反应温度为室温、反应时间为1h、FeCl3和FeSO4初始浓度分别为0.1068mol/L和0.0534mol/L、n(Fe3+)∶[n(Cu2+)+n(Zn2+)]=10的最佳工艺条件下,浸出液中铜去除率为94.5%,锌去除率为98.0%。

Copper and zinc in sludge extract were removed by improved ferrite coprecipitation process using lime milk as neutralization reagent. The experimental results show that： Under the optimum conditions of mixed solution pH 8.9, room temperature, reaction time 1h, FeCl3 initial concentration 0. 106 8 mol/L, FeSO4 initial concentration 0. 053 4 mol/L, n（ Fe^3＋ ） ： [ n（Cu^2＋ ） ＋ n（Zn^2＋ ） ] = 10, the removal rates of copper and zinc in the extract are 94.5% and 98.0% respectively.