二氧化碳阴离子自由基还原降解水溶液中全氟辛烷磺酸盐动力学模型构建与模拟  

The Construction and Simulation of a Kinetic Model for Reductive Degradation of Perfluorooctane Sulphonate by Carbon Dioxide Anion Radical in Aqueous Solution

作　　者：胡晓钧 尹伶格 朱江[2] 李炳智 Hu Xiaojun;Yin Lingge;Zhu Jiang;Li Bingzhi(Shanghai Institute of Technology,Shanghai 201418;Shanghai Academy of Environmental Sciences,Shanghai 200233)

机构地区：[1]上海应用技术大学,上海201418 [2]上海市环境科学研究院,上海200233

出　　处：《上海环境科学》2024年第4期143-148,169,共7页Shanghai Environmental Sciences

基　　金：国家自然科学基金项目(编号:41303095);上海市自然科学基金项目(编号:17ZR1424000)资助。

摘　　要：针对全氟辛烷磺酸盐(PFOS)去除,构建了热活化过硫酸盐/甲酸盐还原体系。建立了包含16个化学反应方程式的PFOS降解动力学模型,模拟了过硫酸盐浓度、活化温度和PFOS浓度对污染物还原降解的影响。结果表明:在溶液pH=8.0,温度85℃,PFOS约18.6μmol/L,过硫酸盐和甲酸盐浓度均为1.86mmol/L时,反应6h后二氧化碳阴离子自由基还原体系PFOS的脱氟效率达98%。一定范围内增加过硫酸盐和活化温度可提高PFOS的脱氟效率。该模型能够较好地模拟过硫酸盐浓度、PFOS浓度和活化温度变化对PFOS降解动力学的影响。A thermally activated persulphate/formate reduction system was constructed for perfluorooctane sulphonate(PFOS)removal.A PFOS degradation kinetic model including 16 chemical reaction equations has been established to simulate the effects of persulphate concentration,activation temperature and PFOs concentration on the reductive degradation of pollutants.The results indicated that under the conditions of pH value at 8.0,temperature at 85℃,18.6μmol/L of PFOS content,and 1.86 mmol/L of both persulphate and formate concentrations,the PFOs defluorination efficiency in a carbon dioxide anion radical reductive system reached 98%after six hour reaction.Within a certain range,increasing persulphate content and raising activation temperature could further improve the PFOs defluorination efficiency.The model could better simulate the effects of persulphate concentration,PFos content and activation temperature on the kinetics of PFOS degradation.

关 键 词：二氧化碳阴离子自由基 全氟辛烷磺酸盐 热活化过硫酸盐 甲酸盐 动力学模型 

分 类 号：R11[医药卫生—公共卫生与预防医学]