紫外光光催化降解杀虫剂哒螨酮降解产物的分布及应用研究

朱馨乐; 沈迅伟; 袁春伟

环境化学

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朱馨乐, 沈迅伟, 袁春伟. 紫外光光催化降解杀虫剂哒螨酮降解产物的分布及应用研究[J]. 环境化学, 2005, 24(4): 426-429.

引用本文:

朱馨乐, 沈迅伟, 袁春伟. 紫外光光催化降解杀虫剂哒螨酮降解产物的分布及应用研究[J]. 环境化学, 2005, 24(4): 426-429.

ZHU Xin-le, SHEN Xun-wei, YUAN Chun-wei. STUDY ON PHOTOCATALYTIC DEGRADATION OF PESTICIDE PYRIDABEN BY UV LIGHT-PRODUCT DISTRIBUTION AND APPLICATION[J]. Environmental Chemistry, 2005, 24(4): 426-429.

Citation:

ZHU Xin-le, SHEN Xun-wei, YUAN Chun-wei. STUDY ON PHOTOCATALYTIC DEGRADATION OF PESTICIDE PYRIDABEN BY UV LIGHT-PRODUCT DISTRIBUTION AND APPLICATION[J]. Environmental Chemistry, 2005, 24(4): 426-429.

紫外光光催化降解杀虫剂哒螨酮降解产物的分布及应用研究

1.
东南大学分子与生物分子电子学教育部重点实验室, 南京, 210096;
2.
中国兽医药品监察所, 北京, 100081
基金项目:
国家“863计划”重大项目(2002AA302304)资助

STUDY ON PHOTOCATALYTIC DEGRADATION OF PESTICIDE PYRIDABEN BY UV LIGHT-PRODUCT DISTRIBUTION AND APPLICATION

1.
The Key Laboratory of Molecular and Biomolecular Electronics of Ministry of Education, Southeast University, Nanjing, 210096;
2.
China Institute of Veterinary drug control, Beijing, 100081
Fund Project:

摘要: 藉助GC-MS对乙腈/水体系中,360nm以上紫外光光催化杀虫剂哒螨酮产生的降解产物进行定性分析,共检测出15种中间产物.通过降解产物GC峰面积与时间的关系,半定量分析了其生成变化,得到典型的钟型曲线.基于以上分析提出了光催化降解哒螨酮的机理.另外,研究了不同pH值下,十六烷基三甲基溴化铵(CTAB)水溶液中哒螨酮的降解,结果表明,碱性条件下有利于光催化降解反应的进行.
- 光催化 /
- 哒螨酮
Abstract: A qualitative study of the degradation products of the photodegradation of pesticide pyridaben in acetonitrile/water systems under ≥ 360nm UV light irradiation was performed by GC-MS. Up to fifteen compounds were detected as degradation intermediates. We also analyzed the evolution of the degradation products semiquantitatively by plotting areas of the corresponding GC peaks as functions of irradiation time, and the characteristic bell-shaped behavior of intermediates was derived. On the basis of which the photocatalytic degradation mechanism of pyridaben has been proposed. For application, TiO2 photoassisted degradation of pyridaben has been studied in aqueous dispersions in the presence of the cationic surfactant cetyltrimethyl ammonium bromide (CTAB) at different pH values. The results indicated that the degradation favors alkaline condition. The investigation of its degradability processes in water will permit us to bring solutions to remediate water pollution of pesticide insoluble efficiently.
- photocatalysis /
- pyridaben

[1]

Valverde A, Aguilera A, Rodriaguez M et al., Pesticide Residue Levels in Peppers Grown in a Greenhouse after Multiple Applications of Pyridaben and Tralomethrin,J.Agric.Food Chem., 2002,50∶7303-7307
[2] Ollis D, Contaminant Degradation in Water.Environ.Sci. Technol., 1985,19∶480-484
[3] Zhu X, Feng X,Yuan C et al., Photocatalytic Degradation of Pesticide Pyridaben in Suspension of TiO2: Identification of Intermediates and Degradation Pathways.J.Mol. Catal.A,2004, 214∶293-300
[4] Zhao J, Hisao H, Akira T et al., Photodegradation of Surfactants. 11.ζ-Potential Measurements in the Photocatalytic Oxidation of Surfactants in Aqueous TiO₂ Dispersions.Langmuir,1993,9∶1646-1650

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朱馨乐, 沈迅伟, 袁春伟. 紫外光光催化降解杀虫剂哒螨酮降解产物的分布及应用研究[J]. 环境化学, 2005, 24(4): 426-429.

引用本文:

朱馨乐, 沈迅伟, 袁春伟. 紫外光光催化降解杀虫剂哒螨酮降解产物的分布及应用研究[J]. 环境化学, 2005, 24(4): 426-429.

ZHU Xin-le, SHEN Xun-wei, YUAN Chun-wei. STUDY ON PHOTOCATALYTIC DEGRADATION OF PESTICIDE PYRIDABEN BY UV LIGHT-PRODUCT DISTRIBUTION AND APPLICATION[J]. Environmental Chemistry, 2005, 24(4): 426-429.

Citation:

紫外光光催化降解杀虫剂哒螨酮降解产物的分布及应用研究

1. 东南大学分子与生物分子电子学教育部重点实验室, 南京, 210096;
2. 中国兽医药品监察所, 北京, 100081

收稿日期: 2004-09-08

基金项目:

国家“863计划”重大项目(2002AA302304)资助

关键词:

光催化 /
哒螨酮

摘要: 藉助GC-MS对乙腈/水体系中,360nm以上紫外光光催化杀虫剂哒螨酮产生的降解产物进行定性分析,共检测出15种中间产物.通过降解产物GC峰面积与时间的关系,半定量分析了其生成变化,得到典型的钟型曲线.基于以上分析提出了光催化降解哒螨酮的机理.另外,研究了不同pH值下,十六烷基三甲基溴化铵(CTAB)水溶液中哒螨酮的降解,结果表明,碱性条件下有利于光催化降解反应的进行.

English Abstract

STUDY ON PHOTOCATALYTIC DEGRADATION OF PESTICIDE PYRIDABEN BY UV LIGHT-PRODUCT DISTRIBUTION AND APPLICATION

1. The Key Laboratory of Molecular and Biomolecular Electronics of Ministry of Education, Southeast University, Nanjing, 210096;
2. China Institute of Veterinary drug control, Beijing, 100081

Received Date: 2004-09-08

Fund Project:

Keywords:

photocatalysis /
pyridaben

Abstract: A qualitative study of the degradation products of the photodegradation of pesticide pyridaben in acetonitrile/water systems under ≥ 360nm UV light irradiation was performed by GC-MS. Up to fifteen compounds were detected as degradation intermediates. We also analyzed the evolution of the degradation products semiquantitatively by plotting areas of the corresponding GC peaks as functions of irradiation time, and the characteristic bell-shaped behavior of intermediates was derived. On the basis of which the photocatalytic degradation mechanism of pyridaben has been proposed. For application, TiO2 photoassisted degradation of pyridaben has been studied in aqueous dispersions in the presence of the cationic surfactant cetyltrimethyl ammonium bromide (CTAB) at different pH values. The results indicated that the degradation favors alkaline condition. The investigation of its degradability processes in water will permit us to bring solutions to remediate water pollution of pesticide insoluble efficiently.

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紫外光光催化降解杀虫剂哒螨酮降解产物的分布及应用研究

STUDY ON PHOTOCATALYTIC DEGRADATION OF PESTICIDE PYRIDABEN BY UV LIGHT-PRODUCT DISTRIBUTION AND APPLICATION

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紫外光光催化降解杀虫剂哒螨酮降解产物的分布及应用研究

English Abstract

STUDY ON PHOTOCATALYTIC DEGRADATION OF PESTICIDE PYRIDABEN BY UV LIGHT-PRODUCT DISTRIBUTION AND APPLICATION

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