Highly enhanced degradation of organic pollutants in hematite/sulfite/photo system

doi:10.1016/j.cej.2019.124007

	Highly enhanced degradation of organic pollutants in hematite/sulfite/photo system
	Li, Ge 1,2,3; Wang, Cheng 1,2,3; Yan, Yupeng 1,2,3; Yan, Xinran 1,2,3; Li, Wentao 1,2,3; Feng, Xionghan 1,2,3; Li, Jiangshan 4; Xiang, Quanjun 5; Tan, Wenfeng 1,2,3; Liu, Fan 1,2,3
刊名	CHEMICAL ENGINEERING JOURNAL
	2020-04-15
卷号	386 页码:12
关键词	Iron oxide Sulfite Photocatalytic degradation Organic pollutant Oxysulfur radicals
ISSN号	1385-8947
DOI	10.1016/j.cej.2019.124007
英文摘要	Sulfate radical (SO4 center dot-)-based advanced oxidization processes (SR-AOPs) are most commonly explored by activation of peroxydisulfate (PDS), peroxymonosulfate (PMS) or sulfite by various transition-metal ions with or without UV irradiation. Here sulfite activation in the presence of hematite (alpha-Fe2O3) under UV (hematite/sulfite/photo) in the presence of O-2 was successfully developed. The performance of this system towards organic pollutant degradation was evaluated, and the reactive species involved were identified. The results demonstrated that roxarsone (ROX), an aromatic organoarsenic pollutant, could be effectively degraded by this system and the degradation efficiency was greatly affected by initial pH, hematite dosage, and sulfite concentration. Replacement of Na2SO3 with CaSO3 greatly improved the degradation efficiency, and the same amount of sulfite source applied with multiple-dosing mode was more beneficial to pollutant removal than the single-dosing mode. The quenching experiments, electron spin resonance (ESR) spectra, and high-performance liquid chromatography with mass spectrometry (HPLC-MS) analysis of the reaction products showed that SO4 center dot- radicals mainly contributed to the highly efficient ROX degradation. This system also had high degradation efficiencies towards other recalcitrant organic pollutants, such as atrazine, bisphenol A, rhodamine, and methylene blue and could use sunlight instead of artificial UV irradiation. This work provides a practical and cost-effective method for degrading recalcitrant organics in wastewaters, and also exhibits a beneficial treatment strategy to replace Na2SO3 with CaSO3 to enhance the decay of organics, and thus advances the application of this oxidation system.
资助项目	National Natural Science Foundations of China[41771267] ; National Natural Science Foundations of China[41571448] ; National Key Research and Development Program of China[2016YFD0800403]
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000548612000003
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/24551]
专题	中科院武汉岩土力学所
通讯作者	Yin, Hui
作者单位	1.Hubei Key Lab Soil Environm & Pollut Remediat, Wuhan 430070, Peoples R China 2.Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Peoples R China 3.Minist Agr, Key Lab Arable Land Conservat Middle & Lower Reac, Wuhan 430070, Peoples R China 4.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 5.Univ Elect Sci & Technol China, State Key Lab Elect Thin Film & Integrated Device, Chengdu 610054, Peoples R China
推荐引用方式 GB/T 7714	Li, Ge,Wang, Cheng,Yan, Yupeng,et al. Highly enhanced degradation of organic pollutants in hematite/sulfite/photo system[J]. CHEMICAL ENGINEERING JOURNAL,2020,386:12.
APA	Li, Ge.,Wang, Cheng.,Yan, Yupeng.,Yan, Xinran.,Li, Wentao.,...&Yin, Hui.(2020).Highly enhanced degradation of organic pollutants in hematite/sulfite/photo system.CHEMICAL ENGINEERING JOURNAL,386,12.
MLA	Li, Ge,et al."Highly enhanced degradation of organic pollutants in hematite/sulfite/photo system".CHEMICAL ENGINEERING JOURNAL 386(2020):12.