微量铜离子联合碳酸氢盐类芬顿体系降解水中双酚A  

Degradation of bisphenol A by Fenton-like system using trace copper ions combined with bicarbonate in water

作　　者：辛丽红 晏彩霞[1] 聂明华[1,2] 张艺民 袁玉龙 丁明军 王鹏[1] XIN Li-hong;YAN Cai-xia;NIE Ming-hua;ZHANG Yi-min;YUAN Yu-long;DING Ming-jun;WANG Peng(Key Laboratory of Poyang Lake Wetland and Watershed Research,Ministry of Education,School of Geography and Environment,Jiangxi Normal University,Nanchang 330022,China;Key Laboratory of Eco-geochemistry,Ministry of Natural Resource,Beijing 100037,China)

机构地区：[1]江西师范大学地理与环境学院,鄱阳湖湿地与流域研究教育部重点实验室,江西南昌330022 [2]自然资源部生态地球化学重点实验室,北京100037

出　　处：《中国环境科学》2023年第3期1186-1196,共11页China Environmental Science

基　　金：国家自然科学基金项目(42067034,42067058);江西省主要学科学术和技术带头人培养计划(20212BCJL23058);自然部生态地球化学重点实验室开放基金(ZSDHJJ202004)。

摘　　要：基于铜离子(Cu^(2+))的类芬顿体系通常需要较高的Cu^(2+)剂量,可能导致二次污染,为解决这一问题,构建了微量Cu^(2+)(2.5μmol/L)联合碳酸氢盐活化过氧化氢(Cu^(2+)/H_(2)O_(2)/HCO_(3)^(-))体系用于水中双酚A(BPA)的高效降解.结果表明:在一定范围内,Cu^(2+)/H_(2)O_(2)/HCO_(3)^(-)体系对BPA的降解效果随Cu^(2+)投加量的升高而上升,随H_(2)O_(2)和HCO_(3)^(-)投加量的升高呈先上升再降低的趋势.在溶液初始pH值5.06~11.02范围内,BPA均可得到有效去除,且升高反应温度可促进BPA的降解.Cl-、HPO_(4)^(2-)、腐殖酸会抑制BPA降解,而NO_(3)^(-)、SO_(4)^(2-)的影响则可以忽略不计.活性物种猝灭和捕获实验表明,单线态氧和Cu^(3+)是BPA降解过程的主要活性物种.CuCO_(3)(aq)可能是H_(2)O_(2)活化生成的活性氧化物种与Cu^(3+)的主要络合物.同时,Cu^(2+)/H_(2)O_(2)/HCO_(3)^(-)对天然水体基质中的BPA也有较好的去除效果.另外根据5种鉴定的中间体,提出了Cu^(2+)/H_(2)O_(2)/HCO_(3)^(-)体系中BPA的可能降解途径.Higher Cu^(2+)dosage is typically needed for Fenton-like systems based on copper ions(Cu^(2+)), which could result in secondary pollution.In the current study, an effective system for degrading bisphenol A(BPA) was built using bicarbonate-activated hydrogen peroxide and trace copper ions(Cu^(2+)/H_(2)O_(2)/HCO_(3)^(-)).According to the findings, increasing the Cu^(2+)dosage boosted the removal efficiency of BPA, while increasing the H_(2)O_(2)or HCO_(3)^(-)dosage caused the trend to grow initially before declining.BPA can be effectively removed within the range of the initial pH value of solution 5.06~11.02, and the degradation efficiency was improved with increased temperature.The presence of Cl-、HPO_(4)^(2-)and humic acid(HA) were found to delayed the elimination of BPA, while other anions like NO_(3)^(-)and SO_(4)^(2-)had no obvious effects.Quenching and trapping experiments showed that the identified single oxygen and Cu^(3+)were the predominant reactive species responsible for BPA degradation.CuCO_(3)(aq) was the major complex with a high reactivity for H_(2)O_(2)activation to form reactive oxygen species(ROS) and Cu^(3+).At the same time, there is a good removal effect of BPA in the natural water matrix of the Cu^(2+)/H_(2)O_(2)/HCO_(3)^(-)system.In addition, the mechanism of possible degradation of BPA in Cu^(2+)/H_(2)O_(2)/HCO_(3)^(-)has been proposed from the five identified intermediates.

关 键 词：双酚A 微量铜离子 碳酸氢盐 过氧化氢 降解 

分 类 号：X703.1[环境科学与工程—环境工程]