| Summary: | 碩士 === 國立中央大學 === 環境工程研究所在職專班 === 102 === Plastic waste is not easily biodegradable and incineration of hazardous gases like dioxin will produce thar causing air pollution problems. These are serious problemes and difficult to be solved by governments. In the seven major types of plastic materials, the polypropylene fifth of plastic materials, is the largest materials of usage amount, in other words, the total amount of more than 60% . If there is an appropriate method or technology that can make the best use of these resources, we not only can significantly reduce the amount of plastic waste, but also can create a lot of added value.
This study is aimed at filtering copper plating solution of polypropylene, in different ways and the extracted solvents or additives, will be trapped in the dissolution of impurities and residual plating solution between the filter to explore the optimal extraction conditions, and detecting the physical and mechanical properties of polypropylene fiber recycling, and testing whether the degradation or deterioration of the material in order to achieve the purpose of the polypropylene fibers and reuse of resources.
Experimental results show via Fiber Filter crushing if the smaller is the size, the better is the extraction of impurities. Also when comparing different extraction methods, the most effective sonication can increase the rate of dissolution of impurities. In selecting the extraction solvent, the mere extraction with deionized water impurities gare poor results, the extraction rate was only 69.9%, However in terms of the acid extraction, if the extraction time is more than 12 hours, the extraction rate is 83.5%. Increasing the chelating agent as an additive, and controling its dissociation patterns by adjust the pH value, more than 92% of heavy metal impurities can be removed within a short time. However, the chelating agents and chelate heavy metal impurities will form stable complexes which causes subsequent wastewater treatment more difficult. Thus, the actual operation during the process of extraction, careful and further evaluation is required. After detection of the physical and mechanical properties of recover polypropylene filter, its material properties does not become apparent inferiority, nor deterioration of the situation, and it can meet the requirement for reuse.
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