Degradation performance and mechanism of decabromodiphenyl ether (BDE209) by ferrous-activated persulfate in spiked soil

作者：Peng, Hongjiang; Zhang, Wei^*; Liu, Lin; Lin, Kuangfei

来源：Chemical Engineering Journal, 2017, 307: 750-755.

DOI：10.1016/j.cej.2016.08.129

• BDE209
• sodium persulfate
• intermediate product
• sulfate radical
• hydroxylamine

This study first investigated the degradation performance of BDE209 using ferrous activated persulfate-based advanced oxidation process. The results indicated that a lower pH would result in a greater increase in the BDE209 removal efficiency, and the maximum removal efficiency was obtained at pH = 3.0. The effects of sodium persulfate (PS) dosage and molar ratio of PS/Fe(II) were also determined, and 0.2 mol L-1 and 2:1 were the best conditions, where the removal of BDE209 in soil could reach to about 53% after 6 h. Additionally, hydroxylamine (HA) was firstly introduced to a PS/Fe(II) system, and resulted in a large enhancement of BDE209 removal efficiency. Compared to the controls, the degradation rate increased by 13% with the ratio of HA/Fe(II) 4/1, which might be because HA accelerated the transformation from Fe(III) to Fe(lI). Additionally, 9 intermediate products during iron-activated persulfate oxidation process were identified, and a possible reaction mechanism was further proposed.

• 出版日期2017-1-1
• 单位华东理工大学