저농도 Polychlorinated biphenyls(PCBs) 함유 변압기의 고상폐기물 PCBs 함량 분석

Abstract

The major emission source of PCBs in environment is PCBs transformer. To fine out residual PCBs concentration of reusable solid wastes on 2~50 ppm low contaminated PCBs pole mounted transformer after dismantling,the correlation of PCBs concentration between transformer oil and solid wastes after one day natural drop was investigated. As a one of flat solid waste, silicon steel sheet, except for the samples of insulating oil lower than 16 ppm, all silicon steel sheet samples were found to be exceeding the standard in comparison to the current regulatory standard of PCBs-containing solid wastes 0.04 μg/100cm² by wipe test. The PCBs concentration range of tank case was 0.0156~5.8262 μg/100cm², and more than 8.5 ppm PCBs transformer were showed higher residual concentration compared to regulatory standard of PCBs-containing solid wastes 0.04μg/100cm². Except for varnished wire, most of amorphous solid wastes such as copper wire, bushing and iron core/bolt in transformer were detected below 0.4 μg/g. The PCBs concentration range of varnished wire was 0.005~0.2120 μg/g, and more than 8 ppm PCBs transformer were showed higher residual concentration compared to regulatory standard of PCBs-containing solid wastes 0.4 μg/g.