Degradation of sulfamonomethoxine with Fe3O4 magnetic nanoparticles as heterogeneous activator of persulfate
Degradation of sulfamonomethoxine with Fe3O4 magnetic nanoparticles as heterogeneous activator of persulfate
复制标题
Fe3O4 磁性纳米颗粒作为过硫酸盐非均相活化剂降解磺胺间甲氧嘧啶
DOI：
10.1016/j.jhazmat.2010.12.017
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发表时间：
2011-02-28
影响因子：
13.6
通讯作者：
Tang, Heqing
中科院分区：
文献类型：
--
作者：
Yan, Jingchun;Lei, Min;Tang, Heqing
Iron oxide magnetic nanoparticles (Fe3O4 MNPs) can effectively activate persulfate anions (S2O82-) to produce sulfate free radicals (SO4 center dot-), which are a powerful oxidant with promising applications to degrade organic contaminants. The kinetics of sulfamonomethoxine (SMM) degradation was studied in the system of Fe3O4 MNPs and S2O82-. A complete removal of the added SMM (0.06 mmol L-1) was achieved within 15 min with the addition of 1.20 mmol L-1 s(2)O(8)(2-) and 2.40 mmol L-1 Fe3O4 MNPs. There is an optimum concentration of Fe3O4 MNPs because Fe3O4 MNPs may also act as a SO4 center dot- scavenger at higher concentrations. It was further observed that the addition of Fe3O4 MNPs in several batches for a given total amount of the activator is favorable to enhancing the degradation of SMM. A degradation mechanism was proposed on the basis of identification of the degradation intermediates of SMM with liquid chromatography combined with mass spectroscopy. (C) 2010 Elsevier B.V. All rights reserved.
