Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Distribution and Risk Assessment of Bisphenol-A in Tap Water from Rehabilitated Indoor Water Service Pipe

갱생 옥내급수관 수돗물에서 비스페놀-A 분포 및 위해성 평가

  • Jeong, Gwanjo (Seoul Water Institute, Seoul Metropolitan Government) ;
  • Son, Boyoung (Seoul Water Institute, Seoul Metropolitan Government) ;
  • Lee, Inja (Seoul Water Institute, Seoul Metropolitan Government) ;
  • Ahn, Chihwa (Seoul Water Institute, Seoul Metropolitan Government) ;
  • Kim, Junil (Seoul Water Institute, Seoul Metropolitan Government) ;
  • Moon, Boram (Seoul Water Institute, Seoul Metropolitan Government) ;
  • Lee, Suwon (Seoul Water Institute, Seoul Metropolitan Government) ;
  • Ahn, Jaechan (Seoul Water Institute, Seoul Metropolitan Government) ;
  • Kim, Bogsoon (Seoul Water Institute, Seoul Metropolitan Government) ;
  • Chung, Deukmo (Seoul Water Institute, Seoul Metropolitan Government)
  • 정관조 (서울특별시 서울물연구원) ;
  • 손보영 (서울특별시 서울물연구원) ;
  • 이인자 (서울특별시 서울물연구원) ;
  • 안치화 (서울특별시 서울물연구원) ;
  • 김준일 (서울특별시 서울물연구원) ;
  • 문보람 (서울특별시 서울물연구원) ;
  • 이수원 (서울특별시 서울물연구원) ;
  • 안재찬 (서울특별시 서울물연구원) ;
  • 김복순 (서울특별시 서울물연구원) ;
  • 정득모 (서울특별시 서울물연구원)
  • Received : 2016.04.28
  • Accepted : 2016.07.08
  • Published : 2016.07.31
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Abstract

In this study, the survey of bisphenol-A in indoor water service pipes rehabilitated with epoxy resin was conducted and the risk assessment was done to investigate the effect on the human health to drink tap water. Bisphenol-A in raw water was detected in a range of 50~118 ng/L in all samples, where the limit of quantification was 10 ng/L. This is caused by inflow of the sewage effluent or the tributaries of the surrounding area containing bisphenol-A. Bisphenol-A was not detected in finished water after the advanced water treatment process. It was achieved by its removal from the processes of flocculation-precipitation and oxidation of ozone and chlorine and by being changed to other by-product materials. For the indoor water service pipe, bisphenol-A was not detected in all cases which was not coated with epoxy resin. However, when epoxy resin is lined within the indoor water service pipe, bisphenol-A was identified at maximum level of 521 ng/L and was detected above the limit of quantitation at 68 percentages of all samples. The Hazard Quotient (HQ) at the maximum level (521 ng/L) of the detected bisphenol-A is 0.004, which is less than the reference value of 0.1 for the tap water intake. Therefore, it is considered that the detected levels of bisphenol-A in this study would be safe to drink tap water.

본 연구에서는 에폭시 수지 갱생 옥내급수관 수돗물에 대해 비스페놀-A 실태조사를 실시하였고, 비스페놀-A가 수돗물 음용에 있어 인체에 미치는 영향을 파악하기 위해 위해성 평가를 실시하였다. 원수 중 비스페놀-A는 50~118 ng/L로 채취된 모든 시료에서 정량한계 10 ng/L 이상으로 검출되었다. 이것은 주변지역의 하수 방류수나 지천에 의한 비스페놀-A 유입에 의한 것으로 판단된다. 정수에서의 비스페놀-A는 불검출되었으며, 고도정수처리 공정에서 모두 제거된 것으로 추정되었다. 응집-침전과정과 오존 및 염소에 의해 산화되어 제거되거나 다른 산화 부산물질로 변화한 것으로 판단된다. 옥내급수관 수돗물의 경우, 에폭시 갱생공사를 실시하지 않은 수돗물 모두에서 비스페놀-A는 검출되지 않았다. 그러나 에폭시 갱생공사를 실시한 옥내급수관 수돗물에서 비스페놀-A가 불검출에서 최대 521 ng/L로 범위로 검출되었으며, 채취된 시료의 68%가 정량한계 이상으로 검출되었다. 검출된 비스페놀-A의 최대값(521 ng/L)에 대한 위해도 지수 산정 결과, 위해도 지수(HQ)는 약 0.004로 수돗물 섭취에 의한 위해판단 기준값 0.1 이하로 나타나 음용에 안전한 것을 확인하였다.

Keywords

References

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