改性黄铁矿烧渣催化臭氧氧化水中活性黑5  

Ozonation of Aqueous Reactive Black 5 Catalyzed by Modified PyC

作　　者：何宏平[1] 吴德礼[1] 马鲁铭[1] 吕亚平[2] 

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092 [2]普莱克斯(中国)投资有限公司,上海201204

出　　处：《同济大学学报（自然科学版）》2015年第11期1728-1734,共7页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金(41172210)

摘　　要：采用优化的浸渍法制备负载铈的黄铁矿烧渣（CePyC）以提高黄铁矿烧渣的臭氧氧化催化活性.研究表明,pH在3~10范围内,O3/Ce-PyC体系对TOC去除率均维持在80%左右,反应速率常数相比于单独臭氧氧化提高7.22倍,克服了传统臭氧氧化对有机污染物矿化率低,反应受pH影响大的局限性.催化剂性质稳定,重复利用3次后TOC去除率仍在75%以上.表面羟基是PyC催化活性的关键,负载Ce后其催化活性显著增强,能够促进O3分解生成HO·而加速水中有机物的矿化.Pyrite Cinder （PyC）supported Ce by optimized incipient wetness impregnation was prepared to enhance the catalytic activity of PyC in ozonation. TOC removal efficiency of 03/Ce-PyC was kept at about 80 % in the pH range of 3 to 10 in the degradation of aqueous Reactive Black 5（RB5）which was quiet different from the case of traditional ozonation. The kinetic analysis showed that the TOC removal rate constant of 03/Ce-PyC was 7.22 times higher than that of 03 alone in the degradation of RB5. Moreover, the fact that more than 75 % of TOC removal efficiency while the catalyst was reused for the third time indicated stable catalytic activity of Ce-PyC. Surface hydroxyl groups were the key to catalytic activity of PyC while supported Ce enhanced its catalytic activity for its effectiveness in decomposing O3 into HO· . Ce-PyC showed its potential application value in wastewater treatment considering the low cost.

关 键 词：黄铁矿烧渣 Ce-PyC 催化臭氧氧化 染料废水 

分 类 号：X793[环境科学与工程—环境工程]