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폐기물 재활용품 선별원의 노출 가능 유해물질 평가 및 관리방안 연구
황재오 ( Je-o Hwang ),김종서 ( Jong-seo Kim ),이동호 ( Dong-ho Rie ) 한국폐기물자원순환학회(구 한국폐기물학회) 2021 한국폐기물자원순환학회지 Vol.38 No.1
This study aims to quantitatively analyze the environmental hazards (heavy metals and microorganisms) found in the working environment of waste recycling sorting facilities and to study the effects of conveyor cleaning. Analyses of samples taken, from before cleaning and after cleaning, of three conveyors at two recyclable material screening sites were performed between February and June. The hazardous substances measured in this study were 14 heavy metals (Fe, Cu, Mn, Pb, Zn, Ni, Cd, Cr, Al, As, Co, Sn, Si, and Mo) and the biological agents were bacteria and fungi. As a result of cleaning the conveyor, the analyses revealed that Cd, Sn, Co, and Mo heavy metals were no longer detected. The average values of the heavy metals by element were: Cu 3.1(±1.3) μg/cm<sup>2</sup>, Fe 40.1(±2.6) μg/cm<sup>2</sup>, Pb 3.2(±1.7) μg/cm<sup>2</sup>, Mn 3.7(±0.8) μg/cm<sup>2</sup>, Ni 0.6(±0.3) μg/cm<sup>2</sup>, Zn 9.2(±2.6) μg/cm<sup>2</sup>, As 0.7(±0.4) μg/cm<sup>2</sup>, Al 8.8(±1.3) μg/cm<sup>2</sup>, and Si 7.7(±3.5) μg/cm2. Results of the microbial analyses detected a total of 11 bacteria, while Pseudomonas spp. and Bacillus spp. were commonly detected. No fungi were detected. Results after physically cleaning the conveyor showed that the heavy metals removal rate was more than 99%, while microorganisms were not detected. Based on the results of this study, recycling facilities involves workers’ exposure to heavy metals and germs. To prevent the risks, regular physical equipment cleaning and personal hygiene are required.