Simultaneous Removal of Various Pesticides from Contaminated HDPE Packaging by Radiation Processing: Electron Beam and Gamma Radiation Comparison
| Autor: | Celina Lopes Duarte, Manoel Nunes Mori, Hiroshi Oikawa |
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| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Revista Brasileira de Ciências Ambientais, Iss 12, Pp 23-37 (2009) |
| Druh dokumentu: | article |
| ISSN: | 1808-4524 2176-9478 |
| Popis: | Radiation processing is widely used for medical product sterilization and polymeric materials irradiation. Moreover the use of irradiation is becoming a common treatment for many others applications, including wastewater, flue gases, and solid waste materials. In order to evaluate the efficiency of radiation processing on removal of pesticides contamination, high-density polyethylene (HDPE) packaging were irradiated using Radiation Dynamics Electron Beam Accelerator with 1.5MeV energy and 37 kW power, and a Cobalt-60 gamma irradiator, Gammacell type, at the rate 3.5 kGy/h. The chemical analyses of the pesticides were accomplished using a Gas Chromatography associated with the Mass Spectrometry - GCMS from Shimadzu, Model QP 5000. With 25 kGy absorbed dose, a total removal of methomyl, dimethoate, carbofuran, and methydathion, and more than 80% removal of triazine, thiophos, and atrazyne were reached. Lower removal rates were obtained for endosulfan (54%), chlorpyrifos (69%), thriazophos (79%), and trifluralin (74%). |
| Databáze: | Directory of Open Access Journals |
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