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Evaluation of the applicability aluminum sulfate as an extractant for environmentally friendly treatment of cadmium in deep-sea mining tailings

첫 페이지 보기
  • 발행기관
    한국퇴적환경준설학회(구 한국환경준설학회) 바로가기
  • 간행물
    한국퇴적환경준설학회 학술대회 초록집(구 한국환경준설학회 학술대회 논문집) 바로가기
  • 통권
    2022년 한국환경준설학회 추계 학술대회 초록집 (2022.11)바로가기
  • 페이지
    pp.11-12
  • 저자
    이가은, 김경련
  • 언어
    영어(ENG)
  • URL
    https://www.earticle.net/Article/A433063

원문정보

초록

영어
International environmental organizations predicted that the indiscriminate development of deep-sea mineral resources would have a serious impact on the marine environment. However, for countries that depend on imports of mineral resources, such as Korea (Rep. of), it is essential to develop deep-sea mineral resources. Therefore, in Korea (Rep. of), research of on-site/ex-situ treatment technologies that can minimize the impact of deep-sea mining tailings on the marine environment is being actively conducted. Therefore, in this research, the chemical washing treatment efficiency of cadmium (Cd), a harmful heavy metal, in the deep-sea mining tailings was confirmed by comparatively evaluating the two extractants. By comparing aluminum sulfate (AS) with ethylenediaminetetraacetic acid (EDTA), a traditional extractant, the environmental and economic feasibility were compared to confirm the applicability as an eco-friendly extractant. In this experiment, 2% sample was prepared by mixing deionized water and manganese nodules (20 ~ 63 μm) collected from the Clarion-Clipperton Fracture Zone (CCFZ). AS (0.3, 0.5, 1%) and EDTA (0.03, 0.05, 0.1 M) prepared at each concentrations and were added to the 2% manganese nodules sample and stirred for 16 elapsed times (5 m ~ 168 h). As the concentration of AS increased, the extraction concentration of Cd increased by an average of about 4.9 times. On the other hand, EDTA increased about 2.7 times. As the elapsed time increased, the extraction concentration by AS increased by about 3.0 times, and increased by about 8.4 times by EDTA on average. Compared to EDTA, AS showed higher Cd removal efficiency as the concentration increased and even within a short elapsed time. As a result of the research, it was evaluated that it is very suitable to use AS as an extractant of harmful heavy metals in deep-sea mining tailings when comprehensively considering removal efficiency, economic and environmental feasibility. The results of this research will be usefully applied to process design and optimization as basic data presented prior to the development of remediation technologies in the future.

키워드

Deep-sea mining tailings Harmful heavy metals Remediation technologies Chemical washing Eco-friendly extractant

저자

  • 이가은 [ 한국해양과학기술원, 과학기술연합대학원대학교 ]
  • 김경련 [ 한국해양과학기술원, 과학기술연합대학원대학교 ]

참고문헌

자료제공 : 네이버학술정보

간행물 정보

발행기관

  • 발행기관명
    한국퇴적환경준설학회(구 한국환경준설학회) [Korean Society of Sediment Environment and Dredging]
  • 설립연도
    2011
  • 분야
    자연과학>해양학
  • 소개
    본 학회는 저수지, 호소, 하천, 연안해역의 환경개선을 위한 준설공사에 관련된 연구를 촉진하고 국내•외의 관련 연구, 교육 및 산업기관과의 교류를 도모하여 지속 가능한 수 환경 퇴적물관리에 관한 과학기술 진전에 기여함을 목적으로 한다.

간행물

  • 간행물명
    한국퇴적환경준설학회 학술대회 초록집(구 한국환경준설학회 학술대회 논문집)
  • 간기
    반년간
  • 수록기간
    2012~2026
  • 십진분류
    KDC 539 DDC 628

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