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국내 일부 초등학교 바닥먼지 내 화학적 및 생물학적 유해인자의 분석
김지영,정세영,김수정,김진아,시지연,조연우,조경덕,고광표,Kim, Ji-Young,Jung, Se-Young,Kim, Su-Jung,Kim, Jin-Ah,Si, Ji-Yeon,Jo, Yeon-Woo,Zoh, Kyung-Duk,Ko, Gwang-Pyo 한국환경보건학회 2011 한국환경보건학회지 Vol.37 No.4
Objectives: This study investigated the levels and components of floor-settled dust in two elementary schools located at different sites (one near the Shihwa industrial complex and the other in a rural area) in order to evaluate the amounts of trace metal elements (As, Cd, Co, Cr, Cu, Ni, Pb and Zn) and microorganisms. Methods: Over twenty settled-dust samples were collected from the two elementary schools. Trace metal elements were extracted from the dust using hydrochloric acid and nitric acid, and the amounts were measured by ICP-OES. Microbiological analysis was performed by bacterial culturing using R2A medium and denaturing gradient gel electrophoresis (DGGE). Results: The results showed that the amounts of three metal elements (Cr, Pb, and Zn) were significantly different between the schools (${\alpha}$=0.05, p<0.04). In addition, microbial communities in each school were highly correlated with one another. Among the identified microorganisms, a number of potentially opportunistic microorganisms, including antibiotic-resistant bacteria such as Acinetobacter baumannii, were found. Conclusions: This study will provide preliminary data for assessing levels and types of chemical and microbiological agents in elementary schools and for further evaluating human health risks associated with the agents.