유리를 식각하는 공정 폐기물의 배출특성 및 관리방안 = Strategies to Improve of Management and Emission Characteristics of Wastes from Glass Etching Process

다국어 초록 (Multilingual Abstract)

There is legal uncertainty and ambiguity with regards to the classification and disposal of sludge generated from glass etching process. Moreover, secondary effect on the environment such as corrosion of landfill construction by the sludge produced in glass etching process was observed in waste landfill site. As part of response to the parliament’s request for the relevant data and local media coverage, exhaustive investigation of glass etching process was required. Accordingly, we conducted an exhaustive investigation of 8 glass etching manufacturers. Glass etching business is one of the businesses that have seen rapid growth since 2010 with the development of semiconductor and electronics industry, and glass etching producers are mostly located in Gumi, Cheongju, Sejong, Gongju, and Cheonan cities. In this study, we investigated the harmful effects of wastes generated from the glass etching process, how those wastes are classified and treated, problems arose from the process, and secondary effects on the environment observed in waste landfill site. The study found that cyanide, lead, mercury, trichloroethene, and perchloroethene were not detected in the sludge produced from glass etching process, and hexavalent chromium, copper, and arsenic were either not detected or reported at very low level, which was below the threshold concentration level of designated waste. In contrast, pH of sludge produced from glass etching process was between 1.7 and 2.3, pH of hydrofluoric acid used for glass etching showed acidic value of 1.5, which suggests that the classification system of such hazardous substance requires reconsideration.

참고문헌 (Reference)

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12 National Institute of Environmental Research, "A Study on Judgements of Import and Export of Hazardous Waste Characteristics" 2012