陶瓷粉体催化臭氧化降解水中苯酚  

CATALYTIC OZONATION DEGRADATION OF PHENOL IN WATER BY CERAMIC POWDER

作　　者：董玉明 王光丽 蒋平平 张爱民[2] 

机构地区：[1]江南大学化学与材料工程学院,江苏无锡214122 [2]南京大学化学化工学院,介观化学教育部重点试验室,江苏南京210093

出　　处：《水处理技术》2010年第10期28-31,共4页Technology of Water Treatment

基　　金：国家自然科学基金(20903048;20771046);中央高校基本科研业务费专项资金(JUSRP30903);江南大学引进人才启动基金(20081789;20091207);青年基金(2008LQN002;2009LQN11)

摘　　要：将陶瓷粉末应用于降解苯酚废水用臭氧化催化剂,表征了陶瓷的化学组成、0电荷pH和表面羟基密度,并考察了反应条件的影响。结果表明,陶瓷粉末对于臭氧化降解质量浓度为100mg·L-1的模拟苯酚废水具有较为显著的催化效果。不同温度的影响试验表明,在278～308K时,苯酚的降解速率随温度升高而加快,然而(与单独臭氧化比较)在较低温度下陶瓷的催化效果更加显著。结合羟基自由基清除剂的影响试验,推断在催化臭氧化过程中臭氧分子和羟基自由基共同氧化污染物,陶瓷粉末的表面羟基促进了臭氧分子到羟基自由基的转变,因而加快了臭氧化过程。Ceramic powderwas used as ozonation catalyst fortreatment of phenol wastewater. The chemical composition, pH of zero charged point （pH at which the surface is zero charged） and surface hydroxyl density of catalyst were characterized. The ceramic catalyst revealed remarkable acceleration on treatment of simulated wastewaterwith 100 mg·L-1 of phenol. By the control experiments of different temperature at 278~308 K, it was found that the degradation rate of phenol increased along with the enhancement of temperature, and the catalysis of ceramic powder was more notable at lower temperature. Combined the influence of hydroxyl radicals scavenger, it can be concluded that organic compounds were oxidized by ozone molecules and hydroxyl radicals. In catalytic process, the transformation of molecularozone to hydroxyl radicals was accelerated by the surface hydroxyl of ceramic, and then the degradation of phenol was increased.

关 键 词：陶瓷 催化 苯酚 臭氧 废水 

分 类 号：TQ031.7[化学工程] X703.1[环境科学与工程—环境工程]