2-羟基-1,4-萘醌介导Fe^(2+)-STPP厌氧还原对硝基酚  

LQ-mediated reduction of p-nitrophenol via Fe(Ⅱ)coupling sodium tripolyphosphate under anaerobic conditions.

作　　者：宣丽爽 秦传玉 张成武 张婧懿 袁芳 XUAN Li-shuang;QIN Chuan-yu;ZHANG Cheng-wu;ZHANG Jing-yi;YUAN Fang(College of New Energy and Environment,Jilin University,Changchun 130021,China)

机构地区：[1]吉林大学新能源与环境学院,吉林长春130021

出　　处：《中国环境科学》2021年第3期1148-1154,共7页China Environmental Science

基　　金：国家重点研发计划(2018YFC1802500);中央高校基础研究基金。

摘　　要：通过投加Fe^(2+)、三聚磷酸钠(STPP)、2-羟基-1,4-萘醌(LQ),研究了厌氧水体环境中三者对对硝基酚(PNP)还原转化的作用规律,探究了不同因素对LQ介导Fe^(2+)-STPP还原PNP的影响.结果表明,该实验体系在初始pH值为3~9时对PNP均有一定的还原效果;改变STPP浓度对还原PNP几乎无影响;随着LQ浓度或Fe^(2+)浓度的增加,PNP的还原效果增强.机理研究表明,10min内Fe^(2+)迅速将电子转移给LQ,58.4%的LQ接受电子后生成非醌类副产物,其余部分LQ接受电子变成半醌自由基中间体再将电子转移给PNP.Fe^(2+)提供的电子仅有小部分用于PNP的还原,实验体系总体的电子利用率较低.The functions of Fe^(2+),STPP,2-hydroxy-1,4-naphthoquinone(LQ)on the reduction of p-nitrophenol(PNP)in the anaerobic water environment were studied in this research.Besides,effects of different factors on the reduction of PNP by LQ mediated Fe^(2+)-STPP were also explored.The results showed that the experiment system had the reduction effect on PNP when the initial pH value was 3~9 and the change of STPP concentration made no difference on the reduction of PNP.However,with the increase of the concentration of LQ or Fe^(2+),the reduction rate of PNP increased.The mechanism research showed that 58.4%of LQ produced non-quinone after accepting electrons,and the rest of LQ became semiquinone radical and then transferred electrons to PNP.In addition,only a small part of the electrons provided by Fe^(2+)were used in PNP reduction,and the overall electron utilization efficiency of the experimental system was low.

关 键 词：二价铁 三聚磷酸钠(STPP) 2-羟基-1 4-萘醌(LQ) 电子穿梭体 对硝基酚(PNP) 

分 类 号：X703.1[环境科学与工程—环境工程]