铜催化亚硫酸盐自氧化体系中的碘转化研究  

Study on Iodine Transformation in Copper-Catalyzed Sulfite Autoxidation System

作　　者：姚一凡 王梓熙 王川 杨兢欣 Yao Yifan;Wang Zixi;Wang Chuan;Yang Jingxin(School of Environmental Science and Engineering,Guangzhou University,Guangzhou 510006,China;Institute of Environmental Research at Greater Bay,Guangzhou University,Guangzhou 510006,China;Key Laboratory for Water Quality and Conservation of the Pearl River Delta,Ministry of Education,Guangzhou 510006,China)

机构地区：[1]广州大学环境科学与工程学院,广东广州510006 [2]广州大学大湾区环境研究院,广东广州510006 [3]广州大学珠江三角洲水质安全与保护教育部重点实验室,广东广州510006

出　　处：《广东化工》2025年第2期31-33,4,共4页Guangdong Chemical Industry

基　　金：国家自然科学基金(42077159);广东省广州市市校联合项目(20220102023);广州大学国家级大学生创新训练项目(202111078020)。

摘　　要：本研究旨在探索铜催化亚硫酸盐自氧化体系在处理含碘水时的碘转化规律和机理。实验结果表明,在适宜的反应条件下,Cu(Ⅱ)/Na_(2)SO_(3)体系能将水中的碘离子全部转化为碘酸根。甲醇和叔丁醇抑制实验结果证明,硫酸根自由基是Cu(Ⅱ)/Na_(2)SO_(3)体系转化碘离子的主要活性物质,且水中溶解氧在体系转化碘离子过程中起到了关键作用。此外,我们还研究了不同因素如初始p H值、Na_(2)SO_(3)投加浓度、共存阴离子和天然有机物对体系转化效果的影响。实验结果表明,Cu(Ⅱ)/Na_(2)SO_(3)体系在碱性环境中表现出最佳的转化效果。而共存阴离子和天然有机物均不利于该体系中的碘转化。同时,我们证实了Cu(Ⅱ)/Na_(2)SO_(3)体系在实际水体背景下也能进行碘离子的转化。本研究为Cu(Ⅱ)/Na_(2)SO_(3)体系用于含碘水中有机污染物的降解提供了依据。This study aims at exploring the iodine transformation in iodine-containing water using the copper-catalyzed sulfite autoxidation system.Experimental results indicate that under suitable reaction conditions,the Cu(Ⅱ)/Na_(2)SO_(3) system can completely convert iodide ions in water to iodate ions.Inhibition experiments with methanol and tert-Butanol demonstrate that sulfate radicals are the primary active species responsible for iodide ion conversion in the Cu(Ⅱ)/Na_(2)SO_(3) system,with dissolved oxygen playing a crucial role in the process.Additionally,we investigated the influence of various factors such as initial pH,Na_(2)SO_(3) dosage,coexisting anions,and natural organic matter on the conversion efficiency of the system.The results suggest that the Cu(Ⅱ)/Na_(2)SO_(3) system exhibits optimal conversion efficiency under alkaline conditions.However,the presence of coexisting anions and natural organic matter adversely affects the iodine conversion in this system.Furthermore,we confirmed the effectiveness of the Cu(Ⅱ)/Na_(2)SO_(3) system in iodide ion conversion in real water matrices.This study provides insights into the application of the Cu(Ⅱ)/Na_(2)SO_(3) system for the degradation of organic pollutants in iodine-containing water.

关 键 词：二价铜 亚硫酸钠 溶解氧 碘离子 碘酸根 

分 类 号：X703[环境科学与工程—环境工程]