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PHOTOCATALYSIS BEHAVIOR OF AZINPHOS-METHYL AT THE SURFACE OF MODIFIED MONTMORILLONITE
Tao, KL (Tao, Kelin); Chen, HX (Chen, Hongxia); Zhao, Y (Zhao, Yue); Wang, LJ (Wang, Lijin); Jia, HZ (Jia, Hanzhong)
2017
发表期刊FRESENIUS ENVIRONMENTAL BULLETIN
ISSN1018-4619
卷号26期号:6页码:3795-3801
摘要

The use of pesticide such as azinphos-methyl (AZPM) is rapidly increasing around the world, which has posed critical effects on humans and home environment. In the present study, azinphos-methyl was employed as a model to explore the photocatalysis effect of various cation-modified montmorillonite in the soil under visible-light irradiation. For six types of cation-modified montmorillonite(M), the photodegradation rates of AZPM follow the order: Fe3+ >Al3+ >Mg2+ >Ca2+ >K+ >Na+, which is similar to the photo-Fenton-like degradation. To further study the effect of clay type, four types of clays were paralleled, and Fe(III)-montmorilloniteodified smectite shows the highest photodegradation rate followed by Al(III)-modified smectite, suggesting that Fe3+ content plays a key role in photocatalysis degradation of AZPM. Moreover, O,O,S-trimethyl phosphorodithioate and methyl 2-aminobenzoate were determined by GC-MS analyses as the main intermediate compounds, which was degraded into small molecular products, and speculated the catalytic mechanism of AZPM at Fe(III)-montmorillonite surface. In addition, center dot OH (free radical) that measured by electron paramagnetic resonance is formed on Fe(III)-montmorillonite under light with H2O, and it accelerates the photodegradation process of AZPM.

关键词Azinphos-methyl Cation-modified Montmorillonite Photo-degradation Degradation Products Free Radical
收录类别SCI
WOS记录号WOS:000405360700010
引用统计
文献类型期刊论文
条目标识符http://ir.xjipc.cas.cn/handle/365002/5090
专题环境科学与技术研究室
作者单位1.Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Urumqi 830000, Xinjiang, Peoples R China
2.Xinjiang Univ, Inst Geol & Min Engn, Urumqi 830000, Xinjiang, Peoples R China
推荐引用方式
GB/T 7714
Tao, KL ,Chen, HX ,Zhao, Y ,et al. PHOTOCATALYSIS BEHAVIOR OF AZINPHOS-METHYL AT THE SURFACE OF MODIFIED MONTMORILLONITE[J]. FRESENIUS ENVIRONMENTAL BULLETIN,2017,26(6):3795-3801.
APA Tao, KL ,Chen, HX ,Zhao, Y ,Wang, LJ ,&Jia, HZ .(2017).PHOTOCATALYSIS BEHAVIOR OF AZINPHOS-METHYL AT THE SURFACE OF MODIFIED MONTMORILLONITE.FRESENIUS ENVIRONMENTAL BULLETIN,26(6),3795-3801.
MLA Tao, KL ,et al."PHOTOCATALYSIS BEHAVIOR OF AZINPHOS-METHYL AT THE SURFACE OF MODIFIED MONTMORILLONITE".FRESENIUS ENVIRONMENTAL BULLETIN 26.6(2017):3795-3801.
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