자원환경지질 (Economic and Environmental Geology)

  • 제55권4호
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  • Pages.367-376
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  • 2022
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  • 1225-7281(pISSN)
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  • 2288-7962(eISSN)
대한자원환경지질학회 (The Korean Society of Economic and Environmental Geology)
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DOI QR코드

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베타글루칸과 구연산의 교차결합 바이오 폴리머 흡착제를 이용한 수용액내 납과 구리의 흡착

Adsorption of Pb and Cu from Aqueous Solution by β-Glucan Crosslinked with Citric Acid

  • 전한결 (광주과학기술원 지구환경공학부) ;
  • 김경웅 (광주과학기술원 지구환경공학부)
  • Jeon, Han Gyeol (School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST)) ;
  • Kim, Kyoung-Woong (School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST))
  • 투고 : 2022.08.05
  • 심사 : 2022.08.25
  • 발행 : 2022.08.30
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초록

본 연구에서는 바이오폴리머의 일종인 베타글루칸을 구연산과 교차결합하여 수용액 내에서 불용성인 흡착제(crosslinked β-glucan, CBG)롤 제조하였으며, FTIR과 SEM-EDX를 이용하여 CBG의 특성평가와 납과 구리 흡착특성을 파악하기 위한 pH에 따른 흡착량 변화, 흡착속도, 등온흡착 실험을 진행하였다. 특성평가 결과, 베타글루칸과 구연산의 교차결합 메커니즘을 파악하였으며, CBG 표면에서의 납과 구리 흡착을 확인하였다. 수용액 pH에 의한 흡착량 변화 실험에서는 pH 6에서 가장 높은 납과 구리 흡착량을 보였으며, pH 3이하에서는 급격한 감소를 보였다. 또한 흡착속도 실험 결과 CBG에 의한 납과 구리 흡착은 유사 2차 반응속도식과 내부확산식을 따르는 것을 확인하였고, 등온흡착 실험에서는 Langmuir식을 따라 납과 구리 최대흡착량이 각각 59.70, 23.44 mg/g임을 확인하였다. 본 연구에서는 구연산을 이용하여 베타글루칸을 수용액 내 흡착제로 이용하는 방법을 제시하고자 하였으며, 연구결과에 따라 CBG는향후 친환경적인 중금속 흡착제로서의 적용이 가능할 것으로 판단된다.

One of biopolymer, β-glucan (BG) chains were crosslinked by citric acid under the heating condition for the adsorption of Pb and Cu ions in the aqueous solution. The variation of functional groups on BG itself and crosslinked β-glucan (CBG) with their surface adsorption characteristics were investigated by FTIR and SEM-EDX. Adsorption kinetic results showed that adsorption of Pb and Cu onto the CBG followed the pseudo-second-order kinetic model and intra-particle diffusion model. The Langmuir adsorption model was depicted better adsorption characteristics than the Freundlich model. The adsorption capacities of Pb and Cu onto the CBG estimated by the Langmuir model were 59.70 and 23.44 mg/g, respectively. This study suggested that CBG may act as an eco-friendly adsorbent for the adsorption of Pb and Cu in the aqueous solution.

키워드

과제정보

본 연구는 과학기술정보통신부의 재원으로 한국연구재단의 지원을 받아 수행된 연구 (2021R1A2C1094272) 입니다.

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