대한환경공학회지 (Journal of Korean Society of Environmental Engineers)

  • 제39권2호
  • /
  • Pages.66-73
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  • 2017
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  • 1225-5025(pISSN)
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  • 2383-7810(eISSN)
대한환경공학회 (Korean Society of Environmental Engineers)
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제올라이트 NaX에 의한 방사성 물질인 Cs 이온의 흡착 특성

Adsorption Characteristics of Radioactive Cs Ion by Zeolite X

  • 이창한 (부산가톨릭대학교 환경행정학과) ;
  • 이민규 (부경대학교 화학공학과)
  • Lee, Chang-Han (Department of Environmental Adminstration, Catholic University of Pusan) ;
  • Lee, Min-Gyu (Department of Chemical Engineering, Pukyong National University)
  • 투고 : 2016.08.01
  • 심사 : 2017.02.15
  • 발행 : 2017.02.28
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초록

본 연구에서는 제올라이트 X를 이용한 Cs 이온 흡착시 흡착시간 및 초기농도, 온도 및 pH 변화와 같은 영향인자를 평가하였다. 이 결과로부터 Cs 이온의 흡착속도, 등온흡착량 및 열역학적 특성을 해석하였다. 제올라이트 X에 의한 Cs 이온의 흡착은 pH 5~10에서 효과적이었으며, 평형흡착시간은 약 60분이었다. 흡착속도와 등온흡착량은 유사 2차 속도 모델식과 Langmuir 식에 잘 적용되었다. Langmuir 식으로 구한 Cs 이온의 최대 흡착량은 293~333 K에서 각각 303.03~333.33 mg/g이었다. 제올라이트 X에 의한 Cs 이온의 흡착은 흡열반응이고 자발적인 반응이었다. 실험값을 다중회귀분석으로 최적화하여 2차 다항식을 얻었다. 이 최적화된 식으로부터 구한 종속변수의 값과 실험에서 구한 값은 잘 일치하였다.

This study was to evaluate the influential parameters such as intial Cs concentration, reaction temperature, contact time and pH variation of solution on Cs adsorption. Using the experimental data, adsorption kinetics, isotherms and thermodynamic properties were analyzed. The Cs ion adsorption of the zeolite X was effective in the range from pH 5 to 10 and reached equilibrium after 60 minutes. The adsorption kinetics and isotherms of Cs ion with the zeolite X was described well by the pseudo-second-order kinetic and Langmuir isotherm model. The maximum adsorption capacities of Cs ion calculated from Langmuir isotherm model at 293~333 K were from 303.03 mg/g to 333.33 mg/g. It was found that thermodynamic property of Cs ion absorption on the zeolite X was spontaneous and endothermic reaction. The experimental data were fitted a second-order polynomial equation by the multiple regression analysis. The values of the dependent variable calculated by this best fitted model equation were in very good agreement with the experimentally obtained values.

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피인용 문헌

  1. Characteristics of Influence of Domestic Radioactivity due to the Accident in a Nuclear Power Plant in a Neighboring Country - Focus on river and dam basin - vol.40, pp.3, 2018, https://doi.org/10.4491/KSEE.2018.40.3.139