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Study on characteristics of specific hazardous substances in the industrial wastewater effluent

사업장 방류수 중 특정수질유해물질 배출 특성 연구

  • Kim, Seungho (Health and Environment Research Institute of Gwangju) ;
  • Choi, Youngseop (Health and Environment Research Institute of Gwangju) ;
  • Kim, Yunhee (Health and Environment Research Institute of Gwangju) ;
  • Kim, Jongmin (Health and Environment Research Institute of Gwangju) ;
  • Chang, Gilsik (Health and Environment Research Institute of Gwangju) ;
  • Bae, Seokjin (Health and Environment Research Institute of Gwangju) ;
  • Cho, Younggwan (Health and Environment Research Institute of Gwangju)
  • 김승호 (광주광역시보건환경연구원) ;
  • 최영섭 (광주광역시보건환경연구원) ;
  • 김연희 (광주광역시보건환경연구원) ;
  • 김종민 (광주광역시보건환경연구원) ;
  • 장길식 (광주광역시보건환경연구원) ;
  • 배석진 (광주광역시보건환경연구원) ;
  • 조영관 (광주광역시보건환경연구원)
  • Received : 2016.04.12
  • Accepted : 2016.06.17
  • Published : 2016.06.25

Abstract

In this study, 165 wastewater discharge facilities in 10 business types were investigated with regard to 24 specific hazardous substances that included heavy metals, VOCs, CN, and phenol in the Gwangju city. Cu in the range from from 0.008 to 35.420 mg/L was detected in all business types and the detection rate was 46.8 %. Other heavy metals, such as Cd, As, Hg, Pb, and Cr+6 were detected as well. However, their detection rates ranged between 0.6 and 1.8 %. CN and phenol were detected in one and five facilities, respectively. 12 species of VOCs were detected: chloroform 80.6 % (0.42 to 81.60 μg/L), benzene 16.4 % (1.49 to 3.31 μg/L), trichloroethylene 11.5 % (1.78 to 6.02 μg/L), 1,1-dichloroethylene 10.3 % (1.23 to 5.89 μg/L), and dichloromethane 8.5 % (0.28 to 968.86 μg/L) in the detection rate order. The concentration of VOCs was detected in trace amounts, except for dichloromethane that exceeded the effluent quality standard in three business types, namely, metal manufacturing, food industry, and car washing facility. Chloroform was detected in all business types, where 24.88 μg/L were detected in the laundry business and 53.41 μg/L in the water supply business; the mean concentration of chloroform in these two business types was higher than elsewhere. Therefore, for the disposal of non-degradable specific hazardous substances in industrial wastewater, it is necessary to introduce physical and chemical processes, such as activated carbon adsorption, fenton oxidation, ozone treatment, as well as photocatalyst and the UV radiation.

Keywords

specific hazardous substances;wastewater;heavy metals;VOCs

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