자원환경지질 (Economic and Environmental Geology)

  • 제56권5호
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  • Pages.619-628
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  • 2023
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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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안정화제로 사용된 황산칼슘비료의 물리적 형태에 따른 토양 비소 및 수은의 안정화와 식물체 전이특성

Transfer of Arsenic and Mercury from Stabilized Farmland Soil to Lettuce using Calcium Sulfate Fertilizer with Different Physical Properties as a Stabilizing Agent

  • 고일하 (환경기술정책연구원 (NeLab)) ;
  • 권요셉 (환경기술정책연구원 (NeLab)) ;
  • 이민현 (환경기술정책연구원 (NeLab)) ;
  • 김정은 (환경기술정책연구원 (NeLab)) ;
  • 박소영 (환경기술정책연구원 (NeLab)) ;
  • 고주인 (한국광해광업공단 기술연구원) ;
  • 지원현 (호서대학교 일반대학원 에너지기후환경융합기술학과 )
  • Il-Ha Koh (National Environment Lab. (NeLab)) ;
  • Yo Seb Kwon (National Environment Lab. (NeLab)) ;
  • Min-Hyeon Lee (National Environment Lab. (NeLab)) ;
  • Jung-Eun Kim (National Environment Lab. (NeLab)) ;
  • So-Young Park (National Environment Lab. (NeLab)) ;
  • Ju In Ko (Technology Research & Development Institute, Korea Mine Rehabilitation and Mineral Resources Corporation) ;
  • Won Hyun Ji (Department of Energy & Climate Environment Fusion Technology, Graduate School, Hoseo University)
  • 투고 : 2023.07.19
  • 심사 : 2023.10.11
  • 발행 : 2023.10.30
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초록

본 연구에서는 토양 내 비소 및 수은의 안정화제로 황산칼슘비료의 적용 가능성을 검토하였다. 아울러 황산칼슘비료의 물리적 특성(입자상, 미분상, 용액상)에 따른 비소 및 수은의 안정화 특성을 상추 재배 포트실험으로 비교?검토하였다. 34일 간의 상추재배를 통해 확인한 비소 및 수은의 전이감소 효과는 대체적으로 70% 이상인 것으로 나타나 안정화제로서의 적용성을 확인하였다. 다만, 용액상 안정화제 처리조건에서 성장한 상추의 생체량은 대조구의 46% 수준으로 가장 낮았는데, 이는 안정화제로부터 유래된 영양물질의 유효도가 극단적으로 높아 오히려 식물체 성장을 저해한 것으로 판단되었다. 토양 내 비소 및 수은의 분획특성 확인결과 수은에서만 존재형태의 변화가 크게 나타났다. 수은은 안정화 처리된 토양에서 원소수은의 감소와 잔류형/황화물 형태의 증가가 확인되었는데, 이러한 경향은 용액상 > 미분상 > 입자상의 순서로 나타났다. 본 연구를 통해 대형 교반장비의 진입이 어려운 농경지에서는 용액상 처리제의 살포만으로 안정화 효과를 얻을 수 있음을 확인하였다. 다만, 높은 영양물질 유효도로 인해 염해토양의 특성을 보일 수 있으므로, 투여량 조절을 통해 농작물 위해를 사전 제어할 필요가 있다.

In this study, we investigated the feasibility of calcium sulfate fertilizer as a stabilizing agent for As and Hg contaminated farmland soil and its stabilization characteristics in 3 different physical forms (particulate, powder, and solution) through a pot experiment including 34 days of lettuce growth. As and Hg contents of the lettuce grown in the stabilized soils were decreased by at least 70%. However the lettuce yield of the soil stabilized with the solution agent was decreased by 46% due to the overabundance of the nutrients from the solution agent. Thus, if a solution-type agent is planned for agricultural farmland soil stabilization, additional tests for optimal dosage are needed to preserve vegetation growth. In Hg fractionation, a lower concentration of elemental fractions and a higher concentration of residual/sulfide fractions were identified in the soils stabilized with the solution, powder, and pariculate agents in descending order while there were no significant changes in As fractionation. Overall results suggest that calcium sulfate fertilizer can be used as a stabilizing agent, and a solution-type agent could be used when the operation of heavy machinery for the soil stabilization process is impossible.

키워드

과제정보

본 연구는 2022년 한국광해광업공단으로부터 기술개발사업비를 지원받아 수행된 것임.

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