Degradation of hexavalent chromium and methyl orange by the synergistic system of graphitic carbon nitride and electron beam irradiation

doi:10.1016/j.chemosphere.2021.132228

	Degradation of hexavalent chromium and methyl orange by the synergistic system of graphitic carbon nitride and electron beam irradiation
	Ma, Xijun 1,2; Zhou, Yiming 1,2; Gu, Shiqi 1,2; Mei, Su 1,2; Zhu, Guyue 1,2; Yu, Min 1,2; Wu, Yiqing 1,2; Ping, Yuhe 5; Hong, Kun 1,2; Zhang, Jing 1,3
刊名	CHEMOSPHERE
	2022
卷号	287
关键词	Hexavalent chromium Methyl orange Treatment efficiency Graphitic carbon nitride Electron beam irradiation Synergy
ISSN号	0045-6535
DOI	10.1016/j.chemosphere.2021.132228
通讯作者	Zhang, Jing(zhangjing860321@hyit.edu.cn) ; Mao, Ping(pingmao@hyit.edu.cn) ; Wu, Zhengyan(zywu@ipp.ac.cn)
英文摘要	Hexavalent chromium (Cr(VI)) and methyl orange (MO) are highly toxic and difficult to treat. Electron beam irradiation (EB) can produce .OH, H., .O2-, hydrated electron (eaq-) and other active substances, which have strong redox ability to pollutants. However, the penetration capacity of EB is limited (the penetration depth of water is 10 cm). Therefore, the photocatalytic method of graphitic carbon nitride (CN) was used as the synergistic method of EB in this project to degrade Cr(VI) and MO. The results showed that the maximum treatment efficiency of 100 mg L-1 Cr(VI) and 50 mg L-1 MO with liquid surface height of 5 cm was 95.0% and 99.1%, respectively, which was much higher than that of single photocatalytic method (39.5%, 23.4%) and EB (79.6%, 92.1%), and the efficiency of synergistic treatment was higher under acidic condition. When the liquid depth increased to 30 cm, the efficiency of synergistic system decreased by 14.7% and 15.2% for the degradation of Cr (VI) and MO, respectively, less than the single EB treatment (47.2%, 45.7%). Additionally, the performance of the morphology, the light absorption performance, and the separation of photogenerated electron-hole pairs of the CN were evaluated before and after the synergistic system. Lastly, the mechanism illustrates that the electron and thermal effects of EB, e(aq)(-), photogenerated electrons played key roles for the Cr(VI) reduction, and the electron and thermal effects of EB, center dot O-2(-), photogenerated holes played key roles for the MO degradation. This study provides a new opportunity for the synergistic system of photocatalyst and EB in the treatment of pollutants.
资助项目	China Postdoctoral Science Foundation[2019M652225] ; National Natural Science Foundation of China[51908240] ; Natural Science Foundation of Jiangsu Province[BK20181064] ; National & Local Joint Engineering Research Center for Deep Utilization of Mineral-salt Resources[SF201701] ; Jiangsu College Students' Innovation and Entrepreneurship Training Program[202111049410] ; Jiangsu College Students' Innovation and Entrepreneurship Training Program[202111049228]
WOS关键词	PHOTOCATALYTIC DEGRADATION ; CR(VI) REDUCTION ; WASTE-WATER ; DOPED TIO2 ; LIGHT ; REMOVAL ; G-C3N4 ; PERFORMANCE ; NANOSHEETS ; ORGANICS
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000704919500002
资助机构	China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; Natural Science Foundation of Jiangsu Province ; National & Local Joint Engineering Research Center for Deep Utilization of Mineral-salt Resources ; Jiangsu College Students' Innovation and Entrepreneurship Training Program
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/125495]
专题	中国科学院合肥物质科学研究院
通讯作者	Zhang, Jing; Mao, Ping; Wu, Zhengyan
作者单位	1.Huaiyin Inst Technol, Natl & Local Joint Engn Res Ctr Mineral Salt Deep, Huaian 223003, Peoples R China 2.Huaiyin Inst Technol, Key Lab Palygorskite Sci & Appl Technol Jiangsu P, Huaian 223003, Peoples R China 3.Chinese Acad Sci, Hefei Inst Phys Sci, Key Lab High Magnet Field & Ion Beam Phys Biol, Hefei 230031, Peoples R China 4.Chinese Acad Sci, Hefei Inst Phys Sci, Key Lab Environm Toxicol & Pollut Control Technol, Hefei 230031, Peoples R China 5.Nanjing Yuhuatai High Sch, Int Sch, Nanjing, Peoples R China
推荐引用方式 GB/T 7714	Ma, Xijun,Zhou, Yiming,Gu, Shiqi,et al. Degradation of hexavalent chromium and methyl orange by the synergistic system of graphitic carbon nitride and electron beam irradiation[J]. CHEMOSPHERE,2022,287.
APA	Ma, Xijun.,Zhou, Yiming.,Gu, Shiqi.,Mei, Su.,Zhu, Guyue.,...&Wu, Zhengyan.(2022).Degradation of hexavalent chromium and methyl orange by the synergistic system of graphitic carbon nitride and electron beam irradiation.CHEMOSPHERE,287.
MLA	Ma, Xijun,et al."Degradation of hexavalent chromium and methyl orange by the synergistic system of graphitic carbon nitride and electron beam irradiation".CHEMOSPHERE 287(2022).