Simultaneous adsorption/reduction of bromate in water using nano zero-valent iron supported on ordered mesoporous silica

Content Provider	Semantic Scholar
Author	Xin, Xiaodong Sun, Shaohua Wang, Mingquan Zhao, Qinghua Jia, Ruibao
Copyright Year	2019
Abstract	Bromate is mainly produced by ozone oxidation, and it is a kind of highly toxic substance in drinking water and a serious threat to people’s health. It is difficult to remove it using traditional processes. The reduction of nano zero-valent iron (nZVI) has proved to be an effective method to remove bromate in water. In this study, we designed and prepared a new kind of nanocomposite by loading nZVI into ordered mesoporous silica materials (nZVI/MCM-41), which avoided nZVI oxide and increased adsorption at the same time. The removal efficiencies of bromate by MCM-41, nZVI, and nZVI/MCM-41 were evaluated respectively. The result indicated that nZVI/MCM-41 showed the highest removal efficiency for bromate at pH 6.5, with an appropriate dose of 25 mg when initial bromate concentration was 0.2 mg/L. In the removal process, adsorption and reduction exist at the same time and reduction was the leading role. Kinetic studies showed that the removal of bromate by nZVI/MCM-41 followed pseudo-first-order kinetics. Finally, bromine mass balance demonstrated that bromide was the only product for bromate reduction, suggesting that bromate was first adsorbed onto nZVI/MCM-41 and reduced to innocuous bromide by nZVI subsequently. doi: 10.2166/ws.2018.194 om https://iwaponline.com/ws/article-pdf/19/5/1330/570702/ws019051330.pdf 2019 Xiaodong Xin Shaohua Sun Mingquan Wang Qinghua Zhao Wei Li Ruibao Jia (corresponding author) Shandong Province City Water Supply and Drainage Water Quality Monitoring Center, Jinan 250101, China E-mail: jiaruibao1968@163.com
Starting Page	1330
Ending Page	1338
Page Count	9
File Format	PDF HTM / HTML
DOI	10.2166/ws.2018.194
Alternate Webpage(s)	https://watermark.silverchair.com/ws019051330.pdf?token=AQECAHi208BE49Ooan9kkhW_Ercy7Dm3ZL_9Cf3qfKAc485ysgAAAhswggIXBgkqhkiG9w0BBwagggIIMIICBAIBADCCAf0GCSqGSIb3DQEHATAeBglghkgBZQMEAS4wEQQMU-ZKgtiD25WE4d5WAgEQgIIBziqY1b-4YKa7CRrxX_iCpZRSWCedkM_GDAM1g2FTonO8e8JEiad4fSoC1FdCnaHoRU_pF1mZ9v7H2RjiXP1wYDMYsry26nCOogHFZ5vC6pomsiMt0-OCG6c0XDXSOL5k1J8E0dZCho6584zs-77fQj2MRqblNcg-tIFdYdix1Y8TqAfT8QSGBKDGpQvWEDL2kJRo0AGmp5O3fnH9m-30qAo48O1R3wnC0nPzXvNFr2PIq8so8skgMHV9qO18-fMNpt_xFWv9o_uTQsEGVLgoE64Bcer_6Wf7NC87HCxO5kRcQRUjbE878BY95P1Vk4ad4LEWsQEdPM_V6KQw2sneGoTcQQJyePixw3xl3vLtDQdlSNKOXzQDZnr-UH0tXeZSzv8iiNHrMKNRf6coAxUX8DgB7EfSwMC3Wtylq8czaWGP85lIWH0neQ1fPeRqvOdFAPo92MQ-EQtWItSwsTRSfn7YHy3ubRDGLltNYGlWHuNkFHMDq8NTgEJv_iUS7u9pxSXLONy-TbllqkM94MEPgjhABL7E0MQGou4XOKkh4KlATVLkza-DWr-ShwvizFwkqtVjgl8CVw2pfv8chutAQnySU5r3y8NeLIgqQ-3qmQ
Alternate Webpage(s)	https://doi.org/10.2166/ws.2018.194
Volume Number	19
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article