한국환경농학회지 (Korean Journal of Environmental Agriculture)

  • 제42권1호
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  • Pages.35-43
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  • 2023
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  • 1225-3537(pISSN)
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  • 2233-4173(eISSN)
한국환경농학회 (The Korean Society of Environmental Agriculture)
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바이오차 비드를 이용한 수용액에서 Pb의 효율적인 처리효율 평가

Evaluation of Efficient Pb Removal from Aqueous Solutions using Biochar Beads

  • 박유진 (경상국립대학교 응용생명과학부(BK21 Four) & 농업생명과학연구원) ;
  • 이재훈 (경상국립대학교 응용생명과학부(BK21 Four) & 농업생명과학연구원) ;
  • 노준석 (경상국립대학교 응용생명과학부(BK21 Four) & 농업생명과학연구원) ;
  • 최아영 (경상국립대학교 응용생명과학부(BK21 Four) & 농업생명과학연구원) ;
  • 김신실 (경상국립대학교 응용생명과학부(BK21 Four) & 농업생명과학연구원) ;
  • 이슬린 (경상국립대학교 응용생명과학부(BK21 Four) & 농업생명과학연구원) ;
  • 박종환 (동아대학교 생명자원산업학과) ;
  • 서동철 (경상국립대학교 응용생명과학부(BK21 Four) & 농업생명과학연구원)
  • Yu-Jin Park (Division of Applied Life Science(BK21 Four) & Institute of Agriculture and Life Science, Gyeongsang National University) ;
  • Jae-Hoon Lee (Division of Applied Life Science(BK21 Four) & Institute of Agriculture and Life Science, Gyeongsang National University) ;
  • Jun-Suk Rho (Division of Applied Life Science(BK21 Four) & Institute of Agriculture and Life Science, Gyeongsang National University) ;
  • Ah-Young Choi (Division of Applied Life Science(BK21 Four) & Institute of Agriculture and Life Science, Gyeongsang National University) ;
  • Sin-Sil Kim (Division of Applied Life Science(BK21 Four) & Institute of Agriculture and Life Science, Gyeongsang National University) ;
  • Seul-Rin Lee (Division of Applied Life Science(BK21 Four) & Institute of Agriculture and Life Science, Gyeongsang National University) ;
  • Jong-Hwan Park (Department of Life Resources Industry, Dong-A University) ;
  • Dong-Cheol Seo (Division of Applied Life Science(BK21 Four) & Institute of Agriculture and Life Science, Gyeongsang National University)
  • 투고 : 2023.03.13
  • 심사 : 2023.03.24
  • 발행 : 2023.03.31
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초록

본 연구는 저비용 고효율 중금속 흡착제를 개발하기 위해 바이오매스 전소발전소에서 배출된 바이오차를 이용하여 바이오차 비드를 다양한 혼합조건으로 제조하고, 등온흡착과 동적흡착 모델을 활용하여 Pb 처리 효율을 조사하였다. 바이오차 비드의 Pb 흡착 효과를 확인하기 위해 다양한 조건에서 흡착실험을 수행하였다. Freundlich 등온흡착 모델로 흡착특성을 분석해 본 결과 Pb에 대한 바이오차 비드의 흡착패턴은 L형이었다. Langmuir 등온흡착 모델을 통한 바이오차 비드의 최대 흡착량(a)은 2.5% 바이오차 비드(2.5-BB) 처리구에서 28.736 mg/g로 가장 많았다. Pb에 대한 바이오차 비드의 동적흡착 특성을 조사한 결과 반응 8시간에 포화에 도달하였고, 화학적 흡착이 우세하였다. Pb 흡착량은 Pb 용액의 pH가 3일 때 가장 낮았으며, pH 4-5.5에서는 유사한 Pb 흡착량을 보였다. 2.5% 바이오차 비드(2.5-BB) 처리구의 투입량이 26.6 g/L일 때 Pb 제거 효율이 97.9%로 가장 높았다. 이상의 결과를 미루어 볼때, 바이오차 비드는 바이오차의 장점을 살린 저비용 고효율 흡착제로서 활용이 가능할 것으로 판단된다.

The fine particulate structure of biochar limits its use as a heavy metal adsorbent, and makes separation of the biochar from the solution technically challenging, thereby reducing recovery of the heavy metals. To address this issue, this study prepared biochar beads under various mixing conditions and investigated their efficiency in removing Pb from aqueous solutions using adsorption models. The biochar beads were produced by mixing alginate and biochar at different ratios: alginate bead (AB), 1% biochar + bead (1-BB), 2.5% biochar + bead (2.5-BB), and 5% biochar + bead (5-BB). The results revealed that the Freundlich isothermal adsorption pattern of the biochar beads to Pb was of the L-type. The highest Langmuir isothermal adsorption capacity (28.736 mg/g) was observed in the 2.5-BB treatment. The dominant mechanism among the kinetic adsorption characteristics of biochar beads for Pb was chemical adsorption. Additionally, the optimal pH range for Pb adsorption was found to be between 4 and 5.5. The highest Pb removal efficiency (97.9%) was achieved when 26.6 g/L of biochar beads were used. These findings suggest that biochar beads are an economical and highly efficient adsorbent that enables separation and recovery of fine biochar particles.

키워드

과제정보

This work was support by Korea Institute of Planning and Evaluation for Technology in Food, Agriculture and Forestry (IPET) through Livestock Industrialization Technology Development Program, funded by Ministry of Agriculture, Food and Rural Affairs (MAFRA) (Project No. 121034-3).

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