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Mineralogical Properties and Heavy Metal Removal Efficiency of Shells

패각의 광물학적 특성 및 중금속 제거 효율 평가

  • Song, Hye Won (Department of Earth and Environmental Sciences, Andong National University) ;
  • Kim, Jae Min (Department of Earth and Environmental Sciences, Andong National University) ;
  • Kim, Young Hun (Department of Environmental Engineering, Andong National University) ;
  • Kim, Jeong Jin (Department of Earth and Environmental Sciences, Andong National University)
  • 송혜원 (안동대학교 지구환경과학과) ;
  • 김재민 (안동대학교 지구환경과학과) ;
  • 김영훈 (안동대학교 환경공학과) ;
  • 김정진 (안동대학교 지구환경과학과)
  • Received : 2022.09.14
  • Accepted : 2022.09.26
  • Published : 2022.09.30

Abstract

In this study, the removal efficiencies of heavy metals were evaluated using cockle, abalone, and scallop shells. Cockle, abalone, and scallop are composed mainly of aragonite, aragonite, and calcite, and calcite, respectively. The specific surface area of each shell varies from 2.7241 m2/g to 4.5481 m2/g and the order of that is scallop > abalone > cockle. All shells of cockle, abalone, and scallop had no As removal effect by adsorption and precipitation as pH increased. Pb was removed by all shell samples at initial reaction. Although the removal efficiency of Cd and Zn were depending on the reaction medium, that was increased in order of scallop > abalone > cockle. Heavy metal removal efficiency tends to be slightly higher for heated samples than with the raw materials, and higher as the specific surface area is larger.

본 연구에서는 꼬막(cockle), 전복(abalone), 가리비(scallop) 패각을 이용하여 중금속 제거효율 평가를 수행하였다. 꼬막, 전복, 가리비의 주 구성광물은 각각 아라고나이트, 아라고나이트와 방해석, 방해석으로 구성되어 있다. 각 패각들의 비표면적은 2.7241 m2/g에서 4.5481 m2/g까지 다양하며 가리비 > 전복 > 꼬막이다. 반응 후 중금속 분석 결과 As는 패각에 의한 흡착이나 pH 상승에 의한 침전 제거 효과가 나타나지 않았다. 납은 반응 초기에 모든 패각 시료에서 모두 제거되었다. 카드뮴과 아연은 매질에 따라 약간의 차이가 있지만 제거 효율은 가리비 > 전복 > 꼬막 순으로 나타났다. 중금속 제거 효율은 가열 시료가 원시료 비해 약간 높으며, 비표면적이 클수록 높은 경향이 있다.

Keywords

Acknowledgement

이 논문은 안동대학교 기본연구지원사업에 의하여 연구되었으며 이에 감사드립니다. 논문의 질적 향상을 위해 세심하게 검토하고 문제점을 지적해 주신 경상대학교 이우춘 박사님과 익명의 심사위원님께 감사드립니다.

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