The aim of this study is to determine the exposure concentration of tetrabromobisphenol A(TBBPA) in southwestern coast and their photodecomposition rate. Also, it is to identify the radical species of the photodecomposition of TBBPA and their reactive byproducts using the electron spin resonance(ESR) method. TBBPA was not detected in any of the sea water samples from Mokpo, Gunsan, or Goheung. The sediment samples from Mokpo contained not detection(N.D)∼50.0 ng/g dry wt., while those from Gunsan contained N.D∼28.5 ng/g dry wt. and those from Goheung contained N.D∼7.3 ng/g dry wt. The photodecomposition rates were 2.56 × 10-6/hr by visible light(400 nm), 7.98 × 10-6/hr by ultraviolet light(300 nm <), and 6.78 × 10-6/hr by sunlight. Also, we confirmed that singlet oxygen and hydroxyl radicals are the key reactive oxygen species at wavelengths greater than 400 and 300 nm, respectively. This study shows that the main byproducts formed during irradiation at wavelengths above 300 nm are 2,6-dibromobenzosemiquinone radical(2,6-DBSQ·-) and g-value 2.0048 doublet spectrum.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 실험재료 및 장비
  2.2. 연구지역 및 시료채취
  2.3. 해수시료 전처리(액상-액상 추출법)
  2.4. 유도체화(Silylation방법) 및 분석
  2.5. 퇴적물시료 전처리 및 분석
  2.6. 시료조제
  2.7. UV-A 및 가시광선 조사
  2.8. ESR 실험 방법
 3. 결과 및 고찰
  3.1. 우리나라 서남해 연안해역에서의 TBBPA 분포– GC/MSD 연구 –
  3.2. 광 조사에 의한 TBBPA 분해 속도
  3.3. HA 및 라디칼 소거제가 TBBPA의 광분해 반응속도에미치는 영향
  3.4. 태양광선 조사에 의한 TBBPA 분해반응 중 생성되는라디칼 동정
  3.5. 태양광선 조사시간 및 HA의 첨가 농도 변화에 의한ESR 스펙트라의 강도 변화
 4. 결 론
 감사의 글
 REFERENCES

• 한상국(목포해양대학교 환경 생명공학과, Department of Environmental and Biotechnology Engineering, College of Maritime Engineering, Mokpo National Maritime University) | Sang-Kuk Han Corresponding author