您好，欢迎访问中国水产科学研究院 机构知识库！
中国水产科学研究院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Motivation of reactive oxidation species in peracetic acid by adding nanoscale zero-valent iron to synergic removal of spiramycin under ultraviolet irradiation: Mechanism and N-nitrosodimethylamine formation potential assessment

文献类型： 外文期刊

作者： Wang, Lin 1 ; Yan, Tingting 1 ; Tang, Ruijie 1 ; Ping, Qian 1 ; Li, Yongmei 1 ; Wang, Jie 3 ;

作者机构： 1.Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resource Reuse, Key Lab Yangtze River Water Environm, Shanghai 200092, Peoples R China

2.Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

3.Chinese Acad Fishery Sci, Fishery Machinery & Instrument Res Inst, Shanghai 200092, Peoples R China

关键词： Spiramycin; Nanoscale zero-valent iron; Peracetic acid; Ultraviolet irradiation; N-nitrosodimethylamine

期刊名称：WATER RESEARCH （ 影响因子：11.236； 五年影响因子：11.547 ）

ISSN： 0043-1354

年卷期： 2021 年 205 卷

页码：

收录情况： SCI

摘要： In this study, nanoscale zero-valent iron (nZVI) was added to motivate the functions of all the reactive oxidation species in peracetic acid (PAA) mixture under ultraviolet (UV) irradiation, and to enhance the removal of spiramycin, which is a typical precursor of N-nitrosodimethylamine (NDMA). Spiramycin (<= 10 mg/L) could be completely removed within 20 min under the conditions of an initial pH of 4.0, a nZVI dose of 0.02 g/L and a PAA dose of 3.0 mg/L; additionally, 95.8% and 78.8% of PAA and H2O2 were consumed during the process. Electron paramagnetic resonance analysis and quenching experiments confirmed that 52.4% and 44.8% of spiramycin removal was contributed by hydroxyl radical (center dot OH) and carbon-centered radicals (R-C center dot), respectively; and Fe2+ released from nZVI played a critical role in radicals generation. Four degradation pathways of spiramycin were proposed and verified by the density of functional theory analysis. 65.2% of the NDMA formation potential (FP) was reduced after the reaction, and its residual was mainly contributed by the undegraded intermediate of dimethylamine. The results of multiple characterizations and continuous degradation experiments indicated that nZVI was stable in the system as the removal of spiramycin was hardly influenced even if reused three times. The nZVI/UV/PAA process is a promising advanced oxidation technology not only for the removal of refractory NDMA precursors (such as spiramycin) but also for significantly lowering the NDMA FP.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：中国水产科学研究院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台