标题： The UV/peroxymonosulfate process for the mineralization of artificial sweetener sucralose

作者：Xu, Y (Xu, Yin); Lin, ZY (Lin, Ziyan); Wang, Y (Wang, Yan); Zhang, H (Zhang, Hui)

来源出版物：CHEMICAL ENGINEERING JOURNAL卷：317页码：561-569 DOI：10.1016/j.cej.2017.02.058 出版年：JUN 1 2017

摘要：As one of non-nutritive and commonly used artificial sweeteners, sucralose (SUC) is now ubiquitous and detected in aquatic environments, which has already been recognized as an emerging contaminant. The mineralization of SUC in aqueous media by UV/peroxymonosulfate (PMS) process is investigated herein. Influences of several operating parameters, including pH, oxidant concentration and initial SUC concentration, on SUC mineralization were evaluated. Changing the pH from 3 to 9 had a weak effect on the mineralization of SUC, but the mineralization efficiency dropped sharply at pH 11. Nearly complete mineralization (> 95%) of SUC was achieved after 60 min treatment with 3.780 mM oxidant at neutral pH. Both hydroxyl and sulfate radicals were demonstrated to participate in the oxidation of SUC according to EPR analysis. Under neutral pH condition, the presence of inorganic anion such as Cl-, NO3- or NO2- exhibited a varied inhibition effect on the mineralization efficiency with the order being NO2- > NOT > Cl-. Activated sludge inhibition tests and Daphnia magna acute immobilization tests were performed to evaluate the detoxification efficiency of the UV/PMS process. The by-products formed were identified using LC-MS technique and a possible pathway of SUC degradation was proposed. In summary, the obtained result provides meaningful information on the application of UV/PMS process for the mineralization of SUC or other artificial sweeteners.

入藏号：WOS:000400226700053

文献类型：Article

语种：English

作者关键词： Sucralose (SUC); Ultraviolet (UV-C); Peroxymonosulfate; Mineralization; Mechanism

扩展关键词： ADVANCED OXIDATION PROCESSES; AQUEOUS-SOLUTION; BISPHENOL-A; ACTIVATED PERSULFATE; AQUATIC ENVIRONMENT; HYDROXYL RADICALS; PHOTO-FENTON; DEGRADATION; WATER; NITRATE

通讯作者地址：Zhang, H (reprint author), Wuhan Univ, Dept Environm Engn, Wuhan 430079, Peoples R China.

电子邮件地址： eeng@whu.edu.cn

地址：

[Xu, Yin; Lin, Ziyan; Zhang, Hui] Wuhan Univ, Dept Environm Engn, Wuhan 430079, Peoples R China.

[Xu, Yin; Zhang, Hui] Wuhan Univ, Shenzhen Res Inst, Shenzhen 518057, Peoples R China.

[Wang, Yan] Anhui Sci & Technol Univ, Dept Environm Sci & Engn, Donghua Rd 9, Fengyang 233100, Peoples R China.

研究方向：Engineering

ISSN： 1385-8947

eISSN: 1873-3212

影响因子：5.31