폐변압기의 재활용 및 재이용 가능성을 알아보기 위하여 본 연구에서는 유입식 폐변압기의 절연유 중 PCBs 농도에 따른 본체 부재별 PCBs 농도를 분석하였다. (1) 분석대상 5대의 폐변압기 절연유는 7.595 mg/L ~ 23.490 mg/L의 PCBs 농도 분포를 보였다. (2) 비함침성 부재 중 규소강판, 구리각선, 에나멜선에서 각각 한 개 시료(시료E : 절연유 농도 23.490 ...
폐변압기의 재활용 및 재이용 가능성을 알아보기 위하여 본 연구에서는 유입식 폐변압기의 절연유 중 PCBs 농도에 따른 본체 부재별 PCBs 농도를 분석하였다. (1) 분석대상 5대의 폐변압기 절연유는 7.595 mg/L ~ 23.490 mg/L의 PCBs 농도 분포를 보였다. (2) 비함침성 부재 중 규소강판, 구리각선, 에나멜선에서 각각 한 개 시료(시료E : 절연유 농도 23.490 ppm)에서 국내 처리 규제기준을 초과하는 것으로 나타났으며, 에나멜선의 경우 두 개의 시료(시료 C, D : 절연유 농도 10 ~ 11 ppm)에서 규제기준에 약간 못 미치는 농도로 검출되어 중간농도에 대한 추가적인 조사가 이루어 져야 할 것으로 판단되었다. (3) 함침성 부재 중 용출시험법으로 채취한 시료는 모두 국내처리규제기준 및 정량한계인 0.0005 mg/L 미만의 농도를 나타내었으며, n-Hexane으로 초음파 추출한 함침성 시료는 0.4985 mg/kg ~ 5.0419 mg/kg의 농도분포로 분석시료 모두 국내 처리규제기준을 초과하는 것으로 나타났다. 이는 PCBs의 물에 대한 용해도가 매우 낮아 용출시험법에서는 PCBs가 낮게 검출된 것으로 판단된다. (4) 부재채취(n-Hexane 추출)법으로 시험한 변압기 부재의 PCBs 오염특성 분석결과 함침성 부재에서 높은 농도의 PCBs가 검출되는 것과는 달리 비함침성 부재에서는 단순히 오염된 절연유만을 배출하는 것만으로도 극히 미량의 PCBs가 검출되는 것으로 나타났다. 본 연구에서는 샘플확보의 어려움으로 인하여 아주 제한적인 시료만을 분석하였기에 농도범위 및 농도분포의 한계점을 가지고 있어 재활용 가능성에 대하여 단정 짓기에는 어려움이 있다. 그러나 본 연구의 폐 변압기 부재 중 PCBs 농도범위 및 오염특성 분석결과를 종합해 볼 때 절연유가 10ppm 미만 PCBs에 오염된 폐 변압기 중 비함침성 부재는 철저한 발유 후 재활용 및 재이용이 가능할 것으로 예상된다. 하지만 재활용을 하기 위해서는 철저한 사전검토를 통한 절연유 발유 후 재활용에 관한 규정 제정이 선행되어야 할 것이며, 이것은 스톡홀름협약 국가실행계획서(National Implementation Plan : NIP)에 준하는 것이어야 할 것이다. 또한, 재활용에 따르는 비용편익분석을 통한 경제적 효과 및 환경매질의 오염 등 위해성 평가가 충분히 고려되어야 한다. 그리고 본 연구를 계기로 넓은 농도 범위의 폐 변압기에 대한 세밀하고 심도 있는 추가 연구조사가 이루어져야 할 것으로 사료된다.
폐변압기의 재활용 및 재이용 가능성을 알아보기 위하여 본 연구에서는 유입식 폐변압기의 절연유 중 PCBs 농도에 따른 본체 부재별 PCBs 농도를 분석하였다. (1) 분석대상 5대의 폐변압기 절연유는 7.595 mg/L ~ 23.490 mg/L의 PCBs 농도 분포를 보였다. (2) 비함침성 부재 중 규소강판, 구리각선, 에나멜선에서 각각 한 개 시료(시료E : 절연유 농도 23.490 ppm)에서 국내 처리 규제기준을 초과하는 것으로 나타났으며, 에나멜선의 경우 두 개의 시료(시료 C, D : 절연유 농도 10 ~ 11 ppm)에서 규제기준에 약간 못 미치는 농도로 검출되어 중간농도에 대한 추가적인 조사가 이루어 져야 할 것으로 판단되었다. (3) 함침성 부재 중 용출시험법으로 채취한 시료는 모두 국내처리규제기준 및 정량한계인 0.0005 mg/L 미만의 농도를 나타내었으며, n-Hexane으로 초음파 추출한 함침성 시료는 0.4985 mg/kg ~ 5.0419 mg/kg의 농도분포로 분석시료 모두 국내 처리규제기준을 초과하는 것으로 나타났다. 이는 PCBs의 물에 대한 용해도가 매우 낮아 용출시험법에서는 PCBs가 낮게 검출된 것으로 판단된다. (4) 부재채취(n-Hexane 추출)법으로 시험한 변압기 부재의 PCBs 오염특성 분석결과 함침성 부재에서 높은 농도의 PCBs가 검출되는 것과는 달리 비함침성 부재에서는 단순히 오염된 절연유만을 배출하는 것만으로도 극히 미량의 PCBs가 검출되는 것으로 나타났다. 본 연구에서는 샘플확보의 어려움으로 인하여 아주 제한적인 시료만을 분석하였기에 농도범위 및 농도분포의 한계점을 가지고 있어 재활용 가능성에 대하여 단정 짓기에는 어려움이 있다. 그러나 본 연구의 폐 변압기 부재 중 PCBs 농도범위 및 오염특성 분석결과를 종합해 볼 때 절연유가 10ppm 미만 PCBs에 오염된 폐 변압기 중 비함침성 부재는 철저한 발유 후 재활용 및 재이용이 가능할 것으로 예상된다. 하지만 재활용을 하기 위해서는 철저한 사전검토를 통한 절연유 발유 후 재활용에 관한 규정 제정이 선행되어야 할 것이며, 이것은 스톡홀름협약 국가실행계획서(National Implementation Plan : NIP)에 준하는 것이어야 할 것이다. 또한, 재활용에 따르는 비용편익분석을 통한 경제적 효과 및 환경매질의 오염 등 위해성 평가가 충분히 고려되어야 한다. 그리고 본 연구를 계기로 넓은 농도 범위의 폐 변압기에 대한 세밀하고 심도 있는 추가 연구조사가 이루어져야 할 것으로 사료된다.
With the effectuation of Stockholm Convention to restrict and control environmentally persistent organic pollutants like PCBs, POPs attract much attention in and outside Korea recently. As a result of "Stockholm Convention on persistent organic pollutants" effectuated in May, 2004, in Korea, they co...
With the effectuation of Stockholm Convention to restrict and control environmentally persistent organic pollutants like PCBs, POPs attract much attention in and outside Korea recently. As a result of "Stockholm Convention on persistent organic pollutants" effectuated in May, 2004, in Korea, they control PCBs under the goal of termination of them by 2015. And they legislated organic pollutants control law in 2007 and have fully implemented PCBs termination measure since 2008. Compared to the research on the actual condition of PCBs pollutant level in insulation oil, the cases of analysis of PCBs concentration of each material embedded in a transformer(metal, insulation material, insulation sheet) are very few now. Due to the excessive analysis cost and rising processing cost, examination on the actual condition of PCBs containing for oil-containing insulation equipment. As a result, it is difficult to recycle and reuse oil-containing insulation equipments. In addition, annually emerging waste transformers of PCBs are stored in a warehouse or an open-air storage yard, in turn, it costs a great deal and there is quiet a possibility that it causes environmental pollution like secondary pollution due to the leak of PCBs waste. Thus this study examined PCBs‘ pollutional property of the transformer containing insulation oil in each inside material and possibility of their recycle and reuse by analyzing concentration of PCBs in each inside material of transformer containing insulation oil . By the result of the examination on the five waste transformers with insulation oil of PCBs concentration(7.595 mg/L ~ 23.490 mg/L), in the specimen extracted by the surface extraction method out of not-wetting inside material of waste transformer, PCBs with concentration range from 0.016 μg/100cm2(insulation oil 7.595 ppm) to 0.534 μg/100cm2 (insulation oil 23.49 ppm) were detected and in the specimen extracted by ultrasonic waves through extracting method of embedded material(n-Hexane), PCBs with concentration range from 0.001 mg/kg(insulation oil 11.772 ppm) ~ 0.071 mg/kg(insulation oil 23.49 ppm) were detected. Out of not-wetting embedded materials, each one specimen(specimen E: 23.490 ppm of insulation oil's concentration) from silicon steel sheet, cooper wire and enamel wire was over domestic handling standard. In case of enamel wire, two specimens were detected a little lower than regulated standard concentration. So it is concluded that there must be further research on the in between concentration. All specimens extracted by Korean Standard Leaching Test out of embedded wetting materials showed concentration of less than 0.0005 mg/L, which is domestic handling standard and LOQ(Limit of quantitation). Specimens with wetting property(impregnation), extracted by ultrasonic waves with n-Hexane showed concentration distribution of 0.4985 mg/kg ~ 5.0419 mg/kg, so all analyzed specimens were over domestic handling standard. It is considered that PCBs were extracted little through Korean Standard Leaching Test due to the PCBs' low solubility to water. By the analysis result of PCBs' pollutional property of materials embedded in the transformer tested by extracting method of embedded material(n-Hexane extracting), high concentration of PCBs were detected in embedded materials with wetting property but tiny amount of PCBs were detected just by emitting polluted insulation oil in embedded materials with not-wetting property. Due to the difficulty in securing sample, just limited specimens were analyzed in this study. Therefore, it is difficult to conclude possibility of recyclability because there is limit in the scope and distribution of concentration. However, from the analysis result of PCBs concentration scope and pollutional property out of embedded materials of waste transformer in this study, embedded not-wetting materials out of contaminated waste transformer by PCBs with less than 10ppm of insulation oil are expected to be recycled and reused after thorough elimination of insulation oil. However, after eliminating insulation oil through extensive prior examination, regulations about recycle must be established before recycling. And this must follow NIP(National Implementation Plan) of Stockholm Convention. Furthermore, economic effect of recycling through Cost-Benefit Analysis and degree of harm like pollution of environmental medium must be considered enough. And taking this opportunity, it is considered that there must be more detailed and intensive additional research on waste transformer in wide range of concentration.
With the effectuation of Stockholm Convention to restrict and control environmentally persistent organic pollutants like PCBs, POPs attract much attention in and outside Korea recently. As a result of "Stockholm Convention on persistent organic pollutants" effectuated in May, 2004, in Korea, they control PCBs under the goal of termination of them by 2015. And they legislated organic pollutants control law in 2007 and have fully implemented PCBs termination measure since 2008. Compared to the research on the actual condition of PCBs pollutant level in insulation oil, the cases of analysis of PCBs concentration of each material embedded in a transformer(metal, insulation material, insulation sheet) are very few now. Due to the excessive analysis cost and rising processing cost, examination on the actual condition of PCBs containing for oil-containing insulation equipment. As a result, it is difficult to recycle and reuse oil-containing insulation equipments. In addition, annually emerging waste transformers of PCBs are stored in a warehouse or an open-air storage yard, in turn, it costs a great deal and there is quiet a possibility that it causes environmental pollution like secondary pollution due to the leak of PCBs waste. Thus this study examined PCBs‘ pollutional property of the transformer containing insulation oil in each inside material and possibility of their recycle and reuse by analyzing concentration of PCBs in each inside material of transformer containing insulation oil . By the result of the examination on the five waste transformers with insulation oil of PCBs concentration(7.595 mg/L ~ 23.490 mg/L), in the specimen extracted by the surface extraction method out of not-wetting inside material of waste transformer, PCBs with concentration range from 0.016 μg/100cm2(insulation oil 7.595 ppm) to 0.534 μg/100cm2 (insulation oil 23.49 ppm) were detected and in the specimen extracted by ultrasonic waves through extracting method of embedded material(n-Hexane), PCBs with concentration range from 0.001 mg/kg(insulation oil 11.772 ppm) ~ 0.071 mg/kg(insulation oil 23.49 ppm) were detected. Out of not-wetting embedded materials, each one specimen(specimen E: 23.490 ppm of insulation oil's concentration) from silicon steel sheet, cooper wire and enamel wire was over domestic handling standard. In case of enamel wire, two specimens were detected a little lower than regulated standard concentration. So it is concluded that there must be further research on the in between concentration. All specimens extracted by Korean Standard Leaching Test out of embedded wetting materials showed concentration of less than 0.0005 mg/L, which is domestic handling standard and LOQ(Limit of quantitation). Specimens with wetting property(impregnation), extracted by ultrasonic waves with n-Hexane showed concentration distribution of 0.4985 mg/kg ~ 5.0419 mg/kg, so all analyzed specimens were over domestic handling standard. It is considered that PCBs were extracted little through Korean Standard Leaching Test due to the PCBs' low solubility to water. By the analysis result of PCBs' pollutional property of materials embedded in the transformer tested by extracting method of embedded material(n-Hexane extracting), high concentration of PCBs were detected in embedded materials with wetting property but tiny amount of PCBs were detected just by emitting polluted insulation oil in embedded materials with not-wetting property. Due to the difficulty in securing sample, just limited specimens were analyzed in this study. Therefore, it is difficult to conclude possibility of recyclability because there is limit in the scope and distribution of concentration. However, from the analysis result of PCBs concentration scope and pollutional property out of embedded materials of waste transformer in this study, embedded not-wetting materials out of contaminated waste transformer by PCBs with less than 10ppm of insulation oil are expected to be recycled and reused after thorough elimination of insulation oil. However, after eliminating insulation oil through extensive prior examination, regulations about recycle must be established before recycling. And this must follow NIP(National Implementation Plan) of Stockholm Convention. Furthermore, economic effect of recycling through Cost-Benefit Analysis and degree of harm like pollution of environmental medium must be considered enough. And taking this opportunity, it is considered that there must be more detailed and intensive additional research on waste transformer in wide range of concentration.
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