太阳光联合高碘酸盐降解水中新污染物卡马西平  

Degradation of carbamazepine by periodate combined with solar light in water

作　　者：彭程 邱隆慧 晏彩霞 袁玉龙 赖建萍 丁明军[1] 王鹏[1] 聂明华 PENG Cheng;QIU Longhui;YAN Caixia;YUAN Yulong;LAI Jianping;DING Mingjun;WANG Peng;NIE Minghua(Key Laboratory of Poyang Lake Wetland and Watershed Research,Ministry of Education,Jiangxi Province Key Laboratory of Ecological Intelligent Monitoring and Comprehensive Treatment of Watershed,School of Geography and Environment,Jiangxi Normal University,Nanchang 330022;Key Laboratory of Eco-Geochemistry,Ministry of Natural Resource,Beijing 100037)

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,流域生态智能监测与综合治理江西省重点实验室,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：《环境科学学报》2024年第7期95-103,共9页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金(No.42067058,42067034);江西省自然科学基金(No.20232ACB213014,20232BAB203083,20212BCJL23058,S2024QNZD2L0167);流域生态智能监测与综合治理江西省重点实验室项目(No.2023SSY01061)。

摘　　要：以卡马西平(CMZ)为目标污染物,探索太阳光(SL)活化高碘酸盐(PI)降解CMZ的效能及机理.结果表明,在一定条件下([PI]=0.1 mmol·L^(-1),[CMZ]=5μmol·L^(-1)),SL/PI体系可在20 min内完全去除CMZ,且在酸性和中性条件下更有利于CMZ的降解.活性物种淬灭与电子顺磁共振分析显示,羟基自由基(·OH)、单线态氧(^(1)O_(2))、超氧自由基(O_(2)^(·-))和碘酸根自由基(·IO_(3)、·IO_(4))是SL/PI体系中去除CMZ的主要活性物种.水中Mn^(2+)、Fe^(3+)和NO_(3)^(-)对体系降解有轻微促进作用;低浓度的Cl^(-)对降解无明显影响,而高浓度的Cl^(-)有轻微促进作用;HCO_(3)^(-)和腐殖酸(HA)对降解有一定抑制作用;SO_(4)^(2-)则无明显影响.通过对不同反应时间的中间产物进行测定分析,共检测出5种中间产物,并提出了4种CMZ可能的降解途径.同时,通过评估其降解中间产物的毒性,发现SL/PI体系对CMZ的降解伴随着解毒作用.此外,SL/PI体系在实际水体及多种典型新污染物中均表现出较好的处理效能.The elimination of carbamazepine (CMZ) by periodate (PI) combined with solar light (SL) was examined in detail.The results indicated that CMZ would be completely removed by the SL/PI system ([PI]=0.1 mmol·L^(-1),[CMZ]=5μmol·L^(-1)).Meanwhile,it was more conducive for CMZ removal under acidic and neutral conditions.Singlet oxygen (~1O_(2)),superoxide anion radical (O_(2)^(·-)),and iodate radicals(·IO_(3)、·IO_(4)) were proved to be the main reactive species in SL/PI system,based on electron paramagnetic resonance analysis and quenching tests.Mn^(2+)、Fe^(3+)and NO_(3)^(-)accelerated the CMZ removal.Particularly,the promotion of removal might be connected with metal ions’abilities to absorb light and react with PI.It was worth noting that a low concentration of Cl^(-) had an inconspicuous effect on CMZ removal,while a high concentration had a slight promotion effect.HCO_(3)^(-)and humic acid (HA) inhibited the removal and SO_(4)^(2-)had insignificant effect.Five intermediates were identified and four probable pathways were assumed.Moreover,it was determined that the removal of CMZ by the SL/PI system was accompanied by detoxification.In addition,the SL/PI system represented workable both in real waters and various emerging pollutants.

关 键 词：太阳光 卡马西平 高碘酸盐 新污染物 降解 

分 类 号：X703[环境科学与工程—环境工程]