논문 상세보기
pp.482-489
As the industrial and urban development has been accelerated, the issues on Hazardous wastes (HWs) management have become important. HWs that are not included in the code lists are also managed by hazardous characteristics and determination methods in Korea. This study has been performed to investigate corrosive characteristics of hazardous wastes (HWs) depending on pH variations. We considered the type, discharge process and pH of the 14,000 corrosive waste dischargers, of which we visited 60 sites and collected 68 waste acid and alkali samples. Based on results using corrosive testing methods of the USA (EPA Method 1110A) and the Japanese environmental agency (Appendix 8 of the Japan Standard Methods on Specific HWs), it was found that, of total 54 waste acids with pH 2 or below, 47 samples by the USA EPA Methods, and 37 samples by the Japanese testing method exceeded the limit value of the corrosive rate, while 5 waste alkalic samples with pH 12.5 or above did not exceed the limit value of the corrosion rate. Besides, 9 samples with a pH higher than 2 and less than 12.5 failed to meet the corrosive rate limit. It was determined that 17 samples with a pH less than 2, which did not satisfy the standard corrosion rate, gained more weight, due to the acid deposition from acid gas on their exposed surface. Thus, it is assumed that the USA EPA Method is more strictly applicable than the Japanese Method.
