催化湿式共氧化降解内分泌干扰物双酚A的研究  

Catalytic wet co-oxidation of endocrine disrupting chemical-bisphenol A

作　　者：彭艳蓉[1] 王久玲[1] 王鹏[1] 曾光明[1] 刘芬[1] 张玲[2] 黄小明[1] 

机构地区：[1]湖南大学环境科学与工程学院环境生物与控制教育部重点实验室,湖南长沙410082 [2]霍尼韦尔综合科技(中国)有限公司,上海201203

出　　处：《中国环境科学》2015年第8期2417-2425,共9页China Environmental Science

基　　金：国家自然科学基金青年基金项目(51008121);湖南省自然科学基金项目((11JJ4041);湖南大学"青年教师成长计划"项目

摘　　要：以NaNO2为催化剂、2,4,6-三氯苯酚(TCP)为共氧化物质对内分泌干扰物双酚A(BPA)进行了催化湿式共氧化(CWCO)降解,研究发现,在NaNO2存在的条件下,TCP的加入极大地促进了BPA的降解:在170℃、0.5MPa氧气压力条件下反应6h后,催化湿式共氧化体系中COD去除率达到了71.2%,而BPA单独氧化降解时,COD去除率仅为24.7%.在此基础上考察了反应温度、氧气压力、反应时间、TCP浓度和NaNO2浓度对BPA降解效率的影响,筛选出了最优反应条件(170℃的反应温度、0.5MPa的氧气压力、6h的反应时间、0.5mmol/L BPA、0.5mmol/L TCP和0.1mmol/L NaNO2).在优化条件下,BPA和TCP去除率分别达到了100%和96.4%,同时反应后溶液的可生化性大大提高,BOD5/COD值从反应前的0.08增加到了0.95.另外,GC-MS结果表明,BPA和TCP降解的产物主要为小分子有机酸,分别是乙酸,2-甲基戊二酸,丁二酸,3-甲基己二酸,己三酸以及1-丙烯基-1,2,3-三羧酸.该共氧化技术为污染水体中BPA和TCP的同时去除提供了一种可能性.The catalytic wet co-oxidation （CWCO） of bisphenol A （BPA） was conducted with NaNO2 as catalyst and 2,4,6-trichlorophenol （TCP） as co-oxidizing substance, and the results showed that the addition of TCP could significantly promote the degradation of BPA in the presence of NaNO2： when the mixture of BPA and TCP reacted at 170℃ and 0.5MPa oxygen pressure for 6h, the COD removal reached to 71.2%, while the COD removal was only 24.7% after single BPA reacted at the same experimental conditions. On this basis, the effects of reaction temperature, oxygen pressure, reaction time, TCP concentration and NaNO2 concentration on the CWCO of BPA were investigated, and the optimum experimental conditions were selected （170 ℃ of reaction temperature, 0.5 MPa of oxygen pressure, 6h of reaction time, 0.5mmol/L BPA, 0.5mmol/L TCP and 0.1mmol/L NaNO2）： Under the optimized conditions, BPA and TCP removal reached 100% and 96.4%, respectively, meanwhile the biodegradability index of the mixture after the CWCO process was significantly improved with the ratio of BOD5/COD increasing from 0.08 of the raw mixture to 0.95. In addition, the main degradation products determined by GC-MS were some small organic acids, including acetic acid, 2-methylglutaric acid, succinic acid, 3-methyladipic acid, propanetricarboxylic acid and 1-propenyl-1, 2, 3-tricarboxylic acid. The co-oxidation technology for BPA and TCP provides a potential application in treatment ofpoUuted waters.

关 键 词：催化湿式共氧化 双酚A 2 4 6-三氯苯酚 亚硝酸钠 污染水体 

分 类 号：X703[环境科学与工程—环境工程]