Optiuni de decontaminare a deseurilor de ambalaje provenite de la substante toxice

摘要

The implementation of Directive 94/62/EC on packaging and packaging waste has meant a great change on the Romanian legislation and on the research priorities in this area in our country.For this reason,the decontamination options of reusable containers became the aim of this paper,which was prepared in order to evaluate the possibilities of safe recycling of clean containers to the manufacturer or supplier.Our studies have developed ultrasonic extraction,original method for the residual pesticides content such as pyrethroid insecticides e.g.as Deltamethrin 2.5 EC from plastic containers used for pesticide packaging.Thus,we considered the need to examine how polar solvents,e.g propylene glycol,behave in the ultrasonic extraction process of residual pesticides from packaging waste.The efficiency of ultrasonic extraction was determined by advanced analytical techniques such as thermal analysis:thermo gravimetrical(TGA)and calorimetrical(DSC)methods in order to provide scientific information about the residue pesticide level in polymeric materials from pesticide packaging waste.The ultrasonic extraction yield for the pyrethroid insecticide Deltamethrin from used polyethylene from Decis 2.5% packaging is over 98%.The optimum extraction time,in the preliminary experiments,was 60minutes,after which,using the differential calorimetry method,the pesticide Deltamethrin is no longer found in the sonicated polyethylene samples.