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Cu(Ⅱ) 이온과 질소-황을 가진 포단드와의 착물 형성에 관한 연구
최규성,정징운 慶南大學校 附設 基礎科學硏究所 1996 硏究論文集 Vol.8 No.-
The stability constants, enthalpy, and entropy changes of complexation of Cu(Ⅱ) ion with sulfur-containing podand ligands such as tri(phenylthio-2-ethyl)amine(Podand Ⅰ), tetra(phenylthio-2-ethyl)ethylendiamine (Podand Ⅱ) have been determined by uv-vis spectrophotometer in 95% MeOH at various temperature. From the results, the followings have been obtained. Cu(Ⅱ) ion forms a 1:1 complex with these ligands, the order of stability constants and enthaply changes is Podand Ⅰ <Podand Ⅱ, entropy changes is Podand Ⅰ> Podand Ⅱ.
중금속 이온과 질소-황을 포함하는 포단드와의 착물형성에 관한 연구
정징운,이선하,최규성,강동현 慶南大學校 附設 基礎科學硏究所 1997 硏究論文集 Vol.10 No.-
The stability constant, enthalpy, and etropy changes of complexation of heavy metal ions (Zn²*, Cd²*) with podands containing nitrogen-sulfur donors such as tri(phenylthio-2-ethyl)amine (Podand Ⅰ), tri(benzylmercapto-2-ethyl)amine(Podand Ⅱ), and tetra(phenylthio-2-ethyl)ethylenediamine (Podand Ⅲ) have been determined by using potentiometric titration in 95% MeOH at various temperature. We observed the Podand Ⅲ ligand showed the largest protonation constant. The values of protonation constant and stability constant for Zn(Ⅱ), and Cd(Ⅱ) ions among three different ligands were increased as following order, Podand Ⅰ< Podand Ⅱ< Podand Ⅲ. In addition, thermodynamic parameters ΔH and TΔS of Zn(Ⅱ), Cd(Ⅱ) complexes have studied.
이병호,정징운,박홍재 인제대학교 1998 仁濟論叢 Vol.14 No.2
There are many manufacturing processes from gas contact and desulfurization sorbents present for desulfurization efficiency and economic improvement. It has been turned out to have many problems such as a lack of smooth supply, high purchasing cost of materials and high processing cost of desulfurization which has made it problematic for commercial use. Therefore the Korea Electric Power Corporation Research Center is in the middle of developing a dry-type high temp desulfurization system using domestic Limestone and Dolomite and carrying out a desulfurization study with shells in Japan. We are trying to develope the possible uses of desulfidation with after-use cow bone for recycling, practicability, and economic development. We obtained the calcination character of the samples by measuring weight variation according to thermal-decomposition with a thermal gravimetry analysis system and by observing variations in the phase. The first qualitative analysis of the sample resulted in a form of calcium phosphate hydroxide from cow bones and compared JCPDS files after obtaining a diffraction spectrum with an X-ray diffractometer. The second analysis let us ascertain the quality of cow bones.
폐 활성탄을 이용한 타일 제조 및 특성 평가에 관한 연구
박홍재,김민수,정징운,정운,이봉헌,김영식,박연규,정성욱 한국환경보건학회 2001 한국환경보건학회지 Vol.27 No.1
The tiles were manufactured using a mixture of the TK material(a raw material in making tile) and Cu-Cr-Ag impregnated activated carbon(ASC Charcoal). The extraction character of heavy metals in making tile was evaluated and the manufacturing conditions of tile were studied. The heavy metals in the mixture-before and after the tile was production of tiles was successful and as a result of heavy metal analysis, the tile showed that the concentration of heavy metal after the production of tiles was lower than that of the before one. The concentration of eluted heavy metal by acidic and basic solutions was low and the quality of the produced tile was similar to the commercial one. The result of this study suggested that the waste ASC charcoal was used to produce good tiles and it also might reduce soil pollution.
박흥재,유수진,이봉헌,정징운,안호기,박원우 한국환경보건학회 2001 한국환경보건학회지 Vol.27 No.1
The pollution characteristics of water quality analysis and the heavy metal analysis of river sediment in the Western Nakdong river, and then a commercial tile using the polluted sediment was produced. The analytical results of the riverbed structure and the depth distribution in the Western Nakdong river were that Macdo Stream(site 2) was the deepest(13 ft). The analytical result of water quality showed that BOD was the highest in the Hogei Stream(site 6); COD, Syanduengchi Island(site 1);SS, Macdo Stream(site 2);T-N, Suanduengchi Island(site 1);T-P, Macdo Stream(site 2). Therefore the deeper the site was the higher the pollution concentration was. The result of heavy metal analysis of the river sediment was that Pb and Cr were the highest in Kangdong Bridge(site 9); Cd, Macdo Stream(site 2), so the deeper the site was the higher the pollution concentration was. The production of tile using the mixure of the polluted sediment and the raw material was successful, so the reuse of polluted sediment was possible.