Korean Journal of Environmental Agriculture (한국환경농학회지)
- Volume 11 Issue 3
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- Pages.243-252
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- 1992
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- 1225-3537(pISSN)
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- 2233-4173(eISSN)
Application of Principle in Metal-Ligand Complexation to Remove Heavy Metals : Kind and Concentration Effects of Organic Ligands
금속-Ligand 착염형성에 의한 중금속(重金屬) 제거(除去) 방법(方法)에 관한 연구(硏究);유기 Ligand의 종류와 농도(濃度) 영향(影響)
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Yang, Jae-E
(Department of Agircultural Chemistry, Kangwon National University) ;
- Shin, Yong-Keon (Department of Agircultural Chemistry, Kangwon National University) ;
- Kim, Jeong-Je (Department of Agircultural Chemistry, Kangwon National University) ;
- Park, Jeong (Department of Agircultural Chemistry, Kangwon National University)
- Published : 1992.11.30
Abstract
This research was conducted to investigate the influence of kind and concentration of organic ligands such as humic (HA) or fulvic acid (FA) on the removal of Cu or Pb from the aqueous solution employing the principles in metal-ligand complexation. Increasing HA concentration enhanced the efficiency of Cu or Pb removal, but there existed upper critical concentrations capable of forming maximum HA-metal complex. which ranged 53-289 and 42-315mg/L for Cu and Pb, respectively. At these concentrations. efficiency of removal was 70 to 95 % for Pb, but 13 to 65 % for Cu. Amounts of Cu and Pb which complexed with 100mg HA were estimated to be 7.5 and 34.1mg, respectively. FA-metal complex forming reactions were fitted significantly to the empirical models of Freundlich for Cu and Langmuir for Pb. Fulvic acid precipitated nearly 100% of Pb in solution, but formed precipitates with Cu in only 13 to 29%. Comparing organic ligands. HA had a higher removal efficiency for Cu but FA had such for Pb. Metalligand complex formation was differed from kinds and concentrations of corresponding ligands and metals. Results demonstrated that this principle has a strong potential to be employed for treating heavy metals in aqueous solution.
금속-유기리간드 착염형성반응을 이용한 중금속 제거 방법을 연구하기 위하여, 리간드의 종류 및 농도가 침전형성량에 미치는 영향을 알아보았다. 부식산의 처리농도 증가는 금속과의 복합체 형성을 통해 Cu, Pb의 제거효율을 높였으나, 부식산의 일정 농도에서 최대의 침전형성을 보였다. 최대의 침전을 형성할 수 있는 부식산의 농도는 Cu의 경우
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