常见金属及金属氧化物催化超声降解间苯二酚  

Ultrasonic Degradation of Resorcinol Enhanced by Use of Common Metals and Metal Oxides as Catalysts

作　　者：张怡[1] 张光明[1,2] 万甜[1] 宋亚丽[1] 赫俊国[1] 

机构地区：[1]哈尔滨工业大学,黑龙江哈尔滨150090 [2]中国人民大学,北京100872

出　　处：《环境科学与技术》2012年第9期1-3,111,共4页Environmental Science & Technology

基　　金：水体污染控制与治理科技重大专项(2009ZX07317-008-01)

摘　　要：探索了以常见金属铜、锌、铝单质及其氧化物为催化剂,提高超声降解间苯二酚速率的可行性。在超声/零价金属以及超声/金属氧化物同时存在的条件下,以间苯二酚为目标污染物,对间苯二酚的去除效果、溶液pH的变化及金属离子的溶出等进行考察,并对超声波与金属以及金属氧化物协同催化降解有机物的作用机理进行了初步的探讨。实验结果表明,铜、锌、氧化铜均可以有效地催化间苯二酚的超声降解,其过程均符合假一级动力学反应。各类金属和金属氧化物的催化能力排序为铜、锌混合物>氧化铜、锌混合物>锌>铜≈氧化铜。当间苯二酚初始浓度为0.05 mmol/L,初始pH=5,超声频率25 kHz,功率为200 W,铜、锌比例为1:1,投量为1 g/L时,US/Cu-Zn去除间苯二酚的速率常数为1.53×10-2min-1,是单独超声作用时的9倍。This paper describes the experimental study conducted for enhancing ultrasonic degradation of low-biodegradable organics such as resorcinol by common metals and metal oxides as catalysts, e.g. Cu, Zn, and CuO. The experimental results showed that all of the reactions follow the pseudo-first order kinetics, in which admixtures of Cu/Zn and CuO/Zn as well as Cu, Zn and CuO respectively were used as catalysts. Efficiencies of them were evaluated in terms of resorcinol removal per unit mass of the catalyst under the condition of initial pH value of 5, the power of ultrasound of 25 kHz and 200 W and 0.05 mmol/L of the initial resorcinol content. The other finding was the highest ultrasonic removal of resorcinol appeared in the presence of Cu/Zn in mass ratio of I ： 1 with the dose of I g/L with the pseudo-first-order rate constant of 1.53x10-2 rain-1, which was about nine times greater than that of the sole ultrasonic treatment without any catalyst.

关 键 词：超声波 催化 铜 锌 间苯二酚 

分 类 号：X703.1[环境科学与工程—环境工程]