有机废水对光催化还原Cr(VI)的影响

The effect of Organic Wastewater on TiO_2 Photocatalytic reduction Cr(VI)

采用溶胶-凝胶法制备TiO2光催化剂,在紫外灯照射下研究不同类型的有机废水对Cr(VI)的光催化还原影响。结果表明:延长反应时间并不能大幅度提高Cr(VI)的还原率;当pH=2.7时,Cr(VI)的还原率最好;苯酚添加量控制在反应液体积5%以下为宜;添加三种有机废水的反应结束后,放置于自然状态下,均表现出对Cr(VI)后续的还原能力,在三种有机废水中,最适宜的Cr(VI)空穴捕获剂是垃圾渗滤液。

TiO2 photocatalyst powder was prepared using solgel method. The photecatalytic reduction effect of Cr（Ⅵ） was studied when various organic wastewaters were added under ultra violet lamp. The results demonstrated that the photecatalytic reduction efficiency of Cr（Ⅵ） could not accelerated largely when time was longer. The photec.atalytic reduction efficiency of Cr（Ⅵ） was best when pH= 2.7. The additon of phenol was controlled 5% （v/v）. The best hole scavenger among three organic wastewaters was leach.