水环境中BPAF光化学转化及其影响因素  

Photo-degradation of BPAF in aquatic systems and its influencing factors

作　　者：黄睿媛 曾祥英[1,2] 吴毅钉 吴杨 王典[1,2,3] 梁医 于志强[1,2] HUANG Ruiyuan;ZENG Xiangying;WU Yiding;WU Yang;WANG Dian;LIANG Yi;YU Zhiqiang(State Key Laboratory of Organic Geochemistry,Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,Guangdong,China;CAS Center for Excellence in Deep Earth Science,Guangzhou 510640,Guangdong,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院广州地球化学研究所,有机地球化学国家重点实验室广东省环境资源利用与保护重点实验室,广东广州510640 [2]中国科学院深地科学卓越创新中心,广东广州510640 [3]中国科学院大学,北京100049

出　　处：《地球化学》2024年第6期793-800,共8页Geochimica

基　　金：广东省“珠江人才”计划本土创新科研团队项目(2017BT01Z134);广东省省级科技计划项目(2023B1212060049)联合资助。

摘　　要：随着双酚A的限用和禁用,双酚AF(BPAF)作为替代品被广泛使用,BPAF在环境中的检出频率和浓度水平也逐渐增加。本研究通过光化学模拟实验探索水体环境中BPAF光化学行为,考察初始浓度、溶液pH值以及水体中共存溶解有机质(DOM)对光降解转化的影响。结果显示,BPAF可吸收一定波长紫外光直接发生光降解转化,生成OH-BPAF和BPAF-(COOH)_(2),也可能聚合生成更高分子量的二聚体。同时,碱性条件下离子态的BPAF具有更强的紫外吸收能力,降解效率明显提高;水体中共存的DOM通过光子竞争与光屏蔽效应抑制BPAF降解转化。With the banning and restriction of 2,2-bis(4-hydroxyphenyl)propane,2,2-bis(4-hydroxyphenyl)hexafluoropropane(BPAF)has been widely used as a substitute,and the detection frequency and concentration level of BPAF in the environment have gradually increased.In this study,the photo-degradation/photo-transformation of BPAF in water was investigated via photochemical simulation experiments.Several factors were investigated for their possible impacts on BPAF degradation/transformation.The results indicated that BPAF,due to its adsorption of UV light,could be degraded to OH-BPAF and BPAF-(COOH)_(2),or be transformed to a dimer of BPAF with a higher molecular weight than that of BPAF,which acted as an important pathway for BPAF in natural aquatic systems.The degradation efficiency increased gradually with increasing pH due to the higher adsorption potential of UV light in the ionic state.The coexisting DOM can inhibit the possible degradation/transformation of BPAF via photon competition and light-shielding effects.

关 键 词：双酚AF 溶解有机质 光降解 光转化 

分 类 号：X142[环境科学与工程—环境科学]