二价铁活化过硫酸盐降解土壤中十溴联苯醚  

Degradation of decabromodiphenyl ether in soil by sulfate activated with ferrous ions

作　　者：高金龙[1,2] 马玉琳[1,2] 孟庆来[1,2] 谷娜[2,3] 吴云霞[1,2] 秦会会 王奎涛[1,2] 

机构地区：[1]河北科技大学化学与制药工程学院,石家庄050018 [2]河北省药用分子化学重点实验室,石家庄050018 [3]河北科技大学理学院,石家庄050018

出　　处：《环境工程学报》2016年第12期7339-7343,共5页Chinese Journal of Environmental Engineering

摘　　要：研究了Fe^(2+)活化过硫酸钠产生的硫酸根自由基降解土壤中十溴联苯醚(PBDE^(-2)09)的效果,分别考察了Na2S2O8的用量、初始pH值、Na2S2O8与Fe^(2+)摩尔比例、反应时间4个因素对降解效果的影响。通过正交实验确定了降解污染物的最优条件。结果表明,在Na2S2O8用量为0.8 mmol·kg^(-1),初始pH为5,Na2S2O8与Fe^(2+)摩尔比为2∶1,反应时间为30 min的最优条件下,降解率达96.36%。分子探针竞争实验表明体系中产生了硫酸根自由基。Fe^(2+)活化过硫酸钠降解PBDE^(-2)09反应过程符合一级反应动力学。The degradation of decabromodiphenyl ether（ PBDE-209） in soil using sulfate radical generated by Fe2＋-activated sodium persulfate was studied. The effects of persulfate dosage,initial pH value,molar ratio of persulfate to Fe2＋,and reaction time on the degradation process were investigated by single-factor experiments and orthogonal experiments. The optimal operating conditions determined by the orthogonal experiments were as follows： persulfate dosage of 0. 8 mmol·kg^（-1）soil,molar ratio of persulfate to Fe2＋of 2∶ 1,initial pH of 5,and reaction time of 30 min. The degradation efficiency reached 96. 36% under the optimal operating conditions. The molecular probes methods indicated that sulfate radicals were produced in the system. The degradation of PBDE-209 by Fe2＋-activated persulfate follows a first-order kinetic equation.

关 键 词：十溴联苯醚 二价铁 过硫酸盐 土壤 硫酸根自由基 

分 类 号：X53[环境科学与工程—环境工程]