芬顿氧化法预处理化学镀镍废水影响因素研究

Study on the Factors Affecting the Pretreatment of Electroless Nickel Plating Wastewater by Fenton Oxidation

目前电镀行业水污染问题已成为世界各国关注的焦点,其中化学镀镍废水占比较大。本研究以江西某电镀园区化学镀镍废水中以络合物存在的镍、大量难降解的有机物导致的高浓度COD为研究对象,采用化学镀镍废水经芬顿氧化预处理,结果表明,不调节废水pH值、H2O2投加量0.18 mol/L、H2O2/FeSO4物质的量比2∶1、反应时间60 min时,对镍离子和COD处理效率均达到最高的99.20%和83.51%。

At present,the problem of water pollution in electroplating industry has become the focus of attention in the world,of which the electrolessnickel-containing wastewater accounts for a large proportion.An electroplating park in Jiangxi Province was studied,in which the electroless nickel plating waste water being the presence of nickel complex in the wastewater,the high concentration of COD caused by a large number of refractory organic compounds.When the treatment of electroless nickel plating wastewater by Fenton oxidation process was underthe conditions that without adjusting the p H value of the wastewater,adding 0.18 mol/L H2O2,molar ratio of H2O2/FeSO42∶1 and reaction time 60 min,the treatment efficiency of nickel ion and COD reached the highest 99.20%and 83.51%respectively.