일부 공단지역 내 이산화질소의 개인노출 농도 및 건강위해성평가

Abstract

This study was conducted to estimate nitrogen dioxide levels and health risk in various locations/situations for two groups. The nitrogen dioxide levels were measured for residents of a study group (industrial area within 5 km) and a control group (15 km farther), respectively using the nitrogen dioxide filter badge as a passive sampler from August, 2006 to September, 2006. The means of indoor, outdoor, work and personal levels of nitrogen dioxide were <TEX>$34.65{\pm}1.95\;{\mu}g/m^3$</TEX>, <TEX>$34.83{\pm}11.78\;{\mu}g/m^3$</TEX>, <TEX>$34.98{\pm}19.11$</TEX> and <TEX>$35.38{\pm}10.74$</TEX> respectively in the study area. Mean ratio of indoor to outdoor <TEX>$NO_2$</TEX> concentration was 0.99. The means of indoor, outdoor and personal level of nitrogen dioxide were <TEX>$23.66{\pm}7.19\;{\mu}g/m^3$</TEX>, <TEX>$18.22{\pm}4.06\;{\mu}g/m^3$</TEX> and <TEX>$27.27{\pm}18.93\;{\mu}g/m^3$</TEX> respectively in the control area. Mean ratio of indoor to outdoor <TEX>$NO_2$</TEX> concentration was 1.39. People spent 80.9% of their time in indoor at the study area and 76.9% at the control area. The percentages of time spent in outdoor were 14.9% and 20.9% at the study area and the control area respectively. The percentages of time spent in a car were 4.2% and 2.2% in the study and control areas respectively. The levels of indoor, outdoor, workplace nitrogen dioxide in the study area and the control area were found below the permissible level of health-hazardous effects.