光催化氧化消除制革脱毛废水中的硫化物

Removal of Sulfide in Effluent from Tannery by Photocatalytic Oxidation

光催化氧化技术用于去除有机污染物,特别是难降解有机物是十分有效的。制革业中脱毛工序是产生污染最严重的,不仅含有有毒有害的硫化物,还产生大量的蛋白降解物。本文利用光催化氧化技术,对比分析了两种TiO2催化剂作用下的光催化氧化效果,采用分光光度法测定试样中硫化物的去除率,并用COD表征废水中总有机物的去除效果。结果表明,光催化氧化技术能使样品中硫化物尝试在8～10 h内降低90％以上;使脱毛废水和制革综合废水中的硫离子和COD在7 h左右分别去除约50％和70％。

Photocatalytic oxidationhas is very effective for removing organic pollutant, especially hard-degradating organic pollutant. Unhairing is a process which pruduces the most pollutants in tanning processes including noxious sulfide and a large number of protein hydrolysates. Removing sulfide in effulent under TiO2 by photocatalytic oxidadtion, and measuring of the concentration of sulfide with spectrophotometer were studied. It was showed that the degrease of sulfide concentration in samples was over 90% in 8 to 10 hours, and the degreasing of both sulfide and COD in effluent from tannery was about 50% and 70% respectively, in 7 hours.