Degradation of nitenpyram pesticide in aqueous solution by low-temperature plasma

• Published in: Environmental technology Vol. 34; no. 12; pp. 1609 - 1616
• Main Authors: Li, S. P, Jiang, Y. Y, Cao, X. H, Dong, Y. W, Dong, M, Xu, J
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 01.06.2013; Taylor & Francis Ltd
• Subjects: Applied sciences; Aqueous solutions; Catalysis; Catalysts; Catalytic reactions; Chemistry; Chromatography; Chromatography, High Pressure Liquid; Degradation; Dielectric barrier discharge; Electric Conductivity; Environmental Restoration and Remediation - methods; environmental technology; Exact sciences and technology; Ferric Compounds - chemistry; Freshwater; General and physical chemistry; General purification processes; high performance liquid chromatography; HPLC-MS; Hydrogen Peroxide - chemistry; Liquid chromatography; low-temperature plasma; Mass Spectrometry; Neonicotinoids; nitenpyram; Pesticides; Pesticides - analysis; Pesticides - chemistry; Plasma; Plasma Gases; Pollution; Pyridines - analysis; Pyridines - chemistry; reaction products; Temperature; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Waste Water; wastewater; wastewater treatment; Wastewaters; Water Pollutants, Chemical - analysis; Water Pollutants, Chemical - chemistry; Water Purification - methods; Water treatment and pollution; British Isles; Plasma reactor; HPLC chromatography; Radial flow; degradation; Modeling; Electric discharge; Waste water; low-temperature plasma; HPLC―MS; pH; Sedimentation tank; Organic compounds; Low temperature; Dielectric materials; Reaction product; nitenpyram; Pesticides; Non thermal plasma; Non equilibrium plasma; Kinetic model; Settling pond; First order; Physicochemical purification; Aqueous solution; Waste water purification; reaction products; Mass spectrometry; Catalyst
• ISSN: 1479-487X; 0959-3330; 1479-487X
• DOI: 10.1080/09593330.2013.765914

In order to study the new technique of plasma wastewater treatment, the degradation behaviour of nitenpyram (NTP) pesticide was investigated in a low-temperature plasma formed during a dielectric barrier discharge process. The reactor was a radial flow sedimentation tank centred around the water inlet. We studied the effect of pesticide concentration and input power of the dielectric barrier discharge, together with the effect of external factors on the degradation of nitenpyram pesticide wastewater such as conductivity and the use of various of catalysts, and the reaction products were analyzed by high-performance liquid chromatography mass spectrometry (HPLC–MS). The results showed that NTP could be effectively removed from aqueous solution by low-temperature plasma. Increasing the input power could improve the efficiency of degradation, conforming to a first-order kinetic model. Use of a suitable catalyst clearly improved the degradation process, as also did low conductivity. The pH of NTP was reduced with discharge time.