Abstract
Fabrication of single atom catalysts(SACs)by a green and gentle method is important for their practi-cal Fenton-like use.In this work,a high effective iron-based catalyst was prepared from the iron-rich Enteromorpha for NPX degradation via peroxymonosulfate(PMS).Both Fe-SACs and iron-clusters was fab-ricated from the intrinsic iron element in Enteromorpha after the urea saturation.The Fe-SACs/clusters can achieve 100％of NPX oxidation within 20 min with the kobs of 0.282 min-1.Quenching tests indi-cated that the radical pathways were not dominated in the catalytic systems,and strong electron transfer process can be induced in the Fe-SACs/clusters+PMS system by using the NPX as electron donor and Fe-SACs/clusters/PMS'complexes as electron acceptor.This result was consistent with the phenomenon ob-served in the galvanic oxidation system.In addition,the Fe-SACs/clusters was deposited onto the ceramic membrane(CM)by the spraying-crosslinking process to form a Fe-SACs/clusters@CM,which showed an effective and continuous NPX degradation in a heterogeneous PMS system.
基金项目
国家自然科学基金(52170086)
Shandong Provincial Excellent Youth(ZR2022YQ47)
NETL
NSTL
万方数据