Concentrations of hydrogen sulfide in ambient air have been measured from January 2014 to June 2016 in a coastal area near the Ulsan National Industrial Complex. The measurement sites were 1 km, 2.6 km, 5.6 km, and 20 km away from a kraft pulp mill, which is located at the most southern edge of the complex. Concentrations above 0.4 ppb were monitored every 5 min and the highest concentration of the day was determined. From a total of 775 measurement days, hydrogen sulfide concentrations > 20 ppb were recorded on 36 and 38 days at the measurement site closest to the mill and the residential area 2.6 km away from the mill, respectively. At the site farthest from the mill, the concentrations were always 20 ppb lower than the malodor regulation for the residential area but sometimes higher than the odor recognition threshold for hydrogen sulfide. Although several emission sources of hydrogen sulfide have been published in the Pollutant Release and Transfer Register of Korea, the kraft pulp mill is considered to be the biggest contributor of atmospheric hydrogen sulfide in the southern coastal area of Ulsan.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 울산 국가산업단지의 황화수소 배출원
  2.2. 측정지점 및 측정기간
  2.3. 분석 및 측정
 3. 결과 및 고찰
  3.1. 각 측정소에서의 측정사례
  3.2. 주거지역 악취규제 기준의 달성률
  3.3. D 측정소에서의 악취 인지
 4. 결 론
 감사의 글
 REFERENCE

• 유미선(울산대학교 자연과학대학 화학과, Department of Chemistry, University of Ulsan) | Mee Seon Yu
• 양성봉(울산대학교 자연과학대학 화학과, Department of Chemistry, University of Ulsan) | Sung-Bong Yang Corresponding author