Journal
ENVIRONMENTAL TECHNOLOGY
Volume 34, Issue 12, Pages 1609-1616Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/09593330.2013.765914
Keywords
low-temperature plasma; nitenpyram; degradation; reaction products; HPLC-MS
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Funding
- Technological Progress Plan of Shandong, China [2011GGE27048]
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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.
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