期刊论文

Electrochemical activated persulfate to degrade perfluorooctanoic acid and the analysis of intermediate products

Gong, J.

中文

环境科学学报

0253-2468

2020

40

6

2045-2054

10.13671/j.hjkxxb.2020.0068

No.21475050:国家自然科学基金 21777052:国家自然科学基金 No.2018YFC1802003:国家重点研发计划 No.2019020701011486:前沿项目 No.CCNU18TS013:中央高校基本科研业务费专项华中师范大学项目

本校为第一且通讯机构

全氟化合物( PFCs)是一种新兴的持久性有机污染物,具有环境持久性、高毒性和难降解性,因此急需研发高效的降解方法.本文采用电化学恒电位电解法活化过硫酸盐,利用得到的具有强氧化性的SO_4~·-有效降解全氟辛酸( PFOA),考察了恒定电位值、过硫酸钠的初始浓度、溶液初始pH值和共存离子对电活化过硫酸盐降解PFOA的影响.同时,结合超高效液相色谱-三重串联四级杆质谱联用仪( UPLC-MS /MS)和气相色谱与质谱联用仪( GC-MS),对其降解的液相和气相中间产物进行探究.结果表明,在控制阴极电位为-1.8 V,初始过硫酸钠溶液浓度为200 mmol·L~(-1),初始溶液pH= 3.29,恒电位电解4 h后,PFOA去除率约达到60%.当体...

Developing efficient methods to degrade perfluorochemicals (PFCs), an emerging class of highly recalcitrant contaminants, are urgently needed in recent years, due to their persistence, high toxicity, and resistance to most regular treatment procedures. Herein, the electrochemical degradation of perfluorooctanoic acid (PFOA) has been achieved by the electrochemical activation of persulfate. The generated sulfate radicals (SO4•-) greatly improve the efficiency of electro-degradation of PFOA. The effects of constant potential, initial concentrati...