Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Synthesis of Ligands Containing Thiophene- or Furan- groups and Determination of Stability Constants of Chelating Compounds for Removal of Heavy Metals (Cd 2+,Pd 2+,Zn 2+,Cu 2+) in Aqueous Solution

수용액 중의 중금속 (Cd 2+,Pd 2+,Zn 2+,Cu 2+)이온 분리를 위한 티오펜 및 퓨란기를 포함하는 리간드들의 합성과 착화합물의 안정도상수 결정

  • 김준광 (대구대학교 사범대학 과학교육학부) ;
  • 김정성 (대구대학교 사범대학 과학교육학부)
  • Published : 2004.04.01
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Abstract

The thiophene or furan-containing hexadentate ligands 1, 12-bis (2-theophene )-2,5,8,ll-tetraazadodecane(Thiotrien ㆍ 4HCl) and 1,12-bis (2-furan)-2,5,8,11-tetraazadodecane(Furatrienㆍ4HC1) were synthesized as their tetrahydrochloride salt and characterized by EA, IR, NMR, and Mass spectrum. Their protonation constants (logK$_{nH}$) and stability constants (logK$^{M}_{L}$ for Cd$^{2+}$, Pb$^{2+}$, $Zn^{2+}$ and Cu$^{2+}$ ions were determined in aqueous solution by potentiometry and compared with 1, 12-bis(2-pyridyl)-2,5,8, 11-tetra-azadodecane(Pytrien) of pyridyl-containing ligand. The effect stability constants of ligands and metal ion for removal of heavy metals in aqueous solution were described.

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