In-situ production and activation of H2O2 for enhanced degradation of roxarsone by FeS2 decorated resorcinol-formaldehyde resins
In-situ production and activation of H2O2 for enhanced degradation of roxarsone by FeS2 decorated resorcinol-formaldehyde resins
复制标题
FeS2 修饰间苯二酚甲醛树脂原位产生和活化 H2O2 以增强洛克沙胂的降解
DOI：
10.1016/j.jhazmat.2021.127650
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发表时间：
2021
影响因子：
13.6
通讯作者：
Zhou Yanbo
中科院分区：
文献类型：
--
作者：
Li;Xia;He Jie;Lu Jian;Zhou;Yi;Zhou Yanbo
Fenton technology performs well in high-risk roxarsone (ROX) removal, but it is limited by the high H2O2transportation and storage risks. Herein, FeS2decorated resorcinol-formaldehyde resins (FeS2-RFR) were successfully prepared to in-situ produce and utilize H2O2for efficient removal of ROX. Under solar light illumination, resorcinol-formaldehyde resins (RFR) efficiently generated a high concentration of H2O2, with a yield of 500 μmol g−1h−1. FeS2can in-situ decompose H2O2to generate·OH, participating in the oxidation of ROX. As a result, the FeS2-RFR catalyst degraded more than 97% of ROX within 2 h and ROX was selectively degraded into low-toxic As(V), which can be simply removed by traditional adsorption or precipitation processes. During the degradation of ROX,·OH played a dominant role. Moreover, the cations (Na+, K+, and Ca2+), anions (SO42−, Cl−), and humic acid had no noticeable inhibition effect on ROX removal. Furthermore, FeS2-RFR can still remove 70% of ROX even after three cycles, proving that this in-situ photo-Fenton system exhibited stability. This study innovatively proposed a double-active site FeS2-RFR photocatalyst for in-situ production and activation of H2O2and showed a sustainable and eco-friendly way for organoarsenic compounds degradation.
