期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 187, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2019.109779
关键词
UV; Persulfate; Peroxymonosulfate; Imidacloprid; Degradation; Kinetics
资金
- National Major Project of Science & Technology Ministry of China [2012ZX07403-001, 2014ZX07406002]
- Specialized Research Fund for the Doctoral Program of Higher Education [20120072110050]
- National Natural Science Foundation of China [51608372]
- Fundamental Research Funds for the Central Universities [0400219279]
- SUES sino-foreign cooperative innovation center for city soil ecological technology integration [2017PT03]
UV-activated persulfate (UV/PS) and peroxymonosulfate (UV/PMS) processes as alternative methods for removal of imidacloprid (IMP) were conducted for the first time. The reaction rate constants between IMP and the sulfate or hydroxyl radical were calculated as 2.33 x 10(9) or 2.42 x 10(10) M-1 s(-1), respectively. The degradation of IMP was greatly improved by UV/PS and UV/PMS compared with only UV or oxidant. At any given dosage, UV/ PS achieved higher IMP removal rate than UV/PMS. The pH range affecting the degradation in the UV/PS and UV/PMS systems were different in the ranges of 6-8 and 9 to 10. SO42-, F- and NO3- had no obvious effect on the degradation in the UV/PS and UV/PMS systems. and PO43- inhibited the degradation of IMP in the UV/PS system, while they enhanced the degradation in the UV/PMS system. Algae organic matters (AOM) were used to consider the impact of the degradation of IMP for the first time. The removal of IMP were restrained by both AOM and natural organic matters. The higher removal rate of IMP demonstrated that both UV/PS and UV/PMS were suitable for treating the water containing IMP, while UV/PS was cost-effective than UV/PMS based on the total cost calculation. Finally, the degradation pathways of IMP were proposed.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据