Journal of Wetlands Research (한국습지학회지)

Korean Wetlands Society (한국습지학회)
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Removal Properties of Aqueous Ammonium ion with Surface Modified Magnetic Zeolite Adsorbents

자성으로 표면개질된 제올라이트 흡착제를 이용한 수중 암모늄 이온 제거 특성

  • Jung, Yong-Jun (Department of Environmental Engineering, Catholic University of Pusan)
  • 정용준 (부산가톨릭대학교 환경공학과)
  • Received : 2019.04.22
  • Accepted : 2019.05.15
  • Published : 2019.05.31
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Abstract

The removal property of magnetic zeolite for the adsorption of aqueous ammonium ion was examined in this work. The surface modified magnetic zeolite was produced by hydrothermal synthesis. The complex of zeolite and $Fe_3O_4$ was established by the observation of SEM and XRD analysis and less than 12.6% of $Fe_3O_4$ content in magnetic zeolite was observed in the form of $Fe_3O_4$ particles. The optimum pH of adsorption was shown around 8 and the maximum adsorption linearly decreased with the increase of $Fe_3O_4$ content. The adsorption isotherm for aqueous ammonium ion was approximated by Langmuir equation. The developed surface modified magnetic zeolite adsorbent was recommended to control the nitrogen pollution for wetland environment system.

본 연구는 수중 암모늄 이온을 처리하기 위하여 자성 제올라이트를 합성하여 흡착 특성을 평가하였다. 표면개질된 자성 제올라이트는 수열작용으로 합성되었다. 제올라이트와 $Fe_3O_4$ 복합체는 SEM과 XRD 분석 결과 혼합비 12.6% 범위이내에서 최적인 상태로 침투 혼합된 것으로 관찰되었다. 최적의 흡착 pH는 중성부근인 약 8근처에서 나타났고, 최대 흡착량은 $Fe_3O_4$ 함량의 증가에 따라 감소하였다. 수중 암모늄 이온은 Langmuir 식에 근사하는 흡착식으로 나타났다. 개발된 합성제올라이트 흡착제는 질소농도의 관리가 필요한 습지환경 보호에도 적용 가능할 것으로 판단된다.

Keywords

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Fig. 1. Photograph of synthetic zeolite adsorbent and application

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Fig. 2. Influence of Fe3O4 concentration in the synthetic solution on magnetic recovery ratio and Fe3O4 content of magnetic zeolite

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Fig. 3. XRD pattern of magnetic zeolite

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Fig. 4. Morphology of magnetic zeolite

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Fig. 5. Influence of pH on adsorption amount with magneticand non-magnetic zeolite adsorbent

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Fig. 6. Influence of adsorption amount on Fe3O4 content

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Fig. 7. Adsorption isotherm of magnetic zeolite adsorbent for ammonium ion

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