폐 분말소화기 약제의 유해성 및 재활용 가능성 평가

Recently, the explosion of powder fire extinguisher led to the replacement of old extinguishers with new ones in Korea. As a result, the amount of waste fire extinguishing agents from discarded fire extinguishers has been increasing. In this study, to determine the recyclability of the fire extinguishing agents, content and leaching test were conducted to identify their health hazards in accordance with the Korean standard method for waste and soil. To this end, nine powders in four new products and five discarded products were sampled from five companies. Analysis of discarded powder of fire extinguishers showed that levels of heavy metals (Pb, Cd, Cr6+,Cr, Hg, Cu, Ni, As, Zn), organic phosphorus, oil, TCE, and PCE were within the levels set out in the Wastes Control Act, the Fertilizer Control Act and the Soil Environment Conservation Act. Only arsenic level in some new and discarded powder of fire extinguisher samples exceeded the acceptable levels as set forth in the Wastes Control Act (1.5 mg/L) and the Soil Environment Conservation Act (25 mg/kg) but within the acceptable arsenic level of 45 mg/kg as set forth in the Fertilizer Control Act. Concentrations of arsenic in the samples ranged from 0.039 to 2.578 mg/L, 6.72 to 38.36 mg/kg. The most commonly used chemical for ABC dry chemical extinguisher is mono-ammonium phosphate, which generally contains up to 0.005% of arsenic and be used as fertilizer. The result confirmed that powder of fire extinguishers could be recycled as fire extinguisher powder or fertilizer as practiced in Japan, USA and UK. But it is necessary to pretreat and meet the regulation of fireextinguisher and fertilizer.