Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Degradation of eriochrome black T by potassium ferrate (VI)

칼륨 페레이트에 의한 Eriochrome Black T 분해 연구

  • Hoang, Nguyen Minh (Department of Environmental Engineering, Pukyong National University) ;
  • Kim, Il-Kyu (Department of Environmental Engineering, Pukyong National University)
  • 황민원 (부경대학교 환경공학과) ;
  • 김일규 (부경대학교 환경공학과)
  • Received : 2022.03.10
  • Accepted : 2022.05.10
  • Published : 2022.06.15
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Abstract

The degradation of EBT (Eriochrome Black T) in an aqueous solution was investigated at various values of pH, Ferrate (VI) dosage, initial concentration, aqueous solution temperature. The maximum degradation efficiency was 95.42% at pH 7 and in that experimental condition, the kapp value was 872.87 M-1s-1. The degradation efficiency was proportional to the dosage of Ferrate (VI). Also, the initial rate constant of EBT degradation increased with decreasing of the EBT initial concentration. In addition, the degradation rate of EBT was increased from 74.04% to 95.42% when the temperature in the aqueous solution was increased from 10℃ to 45℃. The activation energy value was 11.9 kJ/mol for EBT degradation. Overall, the results of the degradation experiment showed that Ferrate (VI) could effectively oxidize the EBT in the aqueous phase.

수용액에서 EBT의 분해는 pH, Ferrate (VI) 투입량, 초기 농도, 수용액 온도 등 다양한 변수의 조건에서 연구되었다. 최대 분해 효율은 pH 7.0에서 95.42%가 달성되었으며, 이 실험 조건에서 얻은 kapp 값은 872.87 M-1s-1 이었다. EBT 분해율은 Ferrate (VI)의 투입량이 증가함에 따라 증가하였으며 EBT 초기 농도가 감소함에 따라 EBT 분해의 초기 속도 상수가 증가하였다. 또한 EBT의 분해율은 온도가 10℃에서 45℃에 도달할 때까지 수용액의 온도에 따라 증가하였으며 이 실험조건에서 활성화 에너지 값은 EBT 분해에 대해 11.9 kJ/mol의 값이 도출되었다. 따라서 분해 실험의 결과는 Ferrate (VI)가 수용액상에서 EBT를 효과적으로 분해시킬 수 있음을 보여주고 있다.

Keywords

References

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