서지주요정보
카드뮴(Ⅱ), 구리(Ⅱ)와 휴믹 물질과의 착물 반응에 관한 연구 = Complexation of cadmium(Ⅱ) and copper(Ⅱ) with humic materials
서명 / 저자 카드뮴(Ⅱ), 구리(Ⅱ)와 휴믹 물질과의 착물 반응에 관한 연구 = Complexation of cadmium(Ⅱ) and copper(Ⅱ) with humic materials / 최서영.
저자명 최서영 ; Choi, Se-Young
발행사항 [대전 : 한국과학기술원, 1994].
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소장정보

등록번호

8004453

소장위치/청구기호

학술문화관(문화관) 보존서고

MCH 94032

SMS전송

도서상태

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초록정보

Three binding models for determining conditional stability constants of Cd(II) and Cu(II) with Humic Materials were evaluated using experimental data obtained from the measurement of free Cu(II), Cd(II) with ion selective electrodes. Three binding models were 1:1 complex model, Scatchard-plot model, Continuous Distribution model based on the Scatchard-plot. A Continuous Distribution model based on the Scatchard-plot showed the greatest promise. This is because this mode has taken into consideration variations in binding energies, without regard to the manner in which metal ion is bound, and variations in binding properties of metal ion - humate complex. So using this method, complexation of Cd(II) and Cu(II) with humic materials was investigated at differing pH, humic material concentrations and ionic strengths (I). In the case of Cd-CoHA complex, at pH = 4, average value of $logK_i(\mu)$ decreased with increasing I : values were 4.51, 4.47 and 4.27 at I values of 0.005M, 0.025M and 0.05M, respectively. Values for μ at I = 0.1M and pH of 4, 5 and 6 were 5.29, 5.42 and 5.70, respectively for the Cu-SFA complex. Decreasing SFA total concentration increased binding strength of Cd-SFA complex. But binding strength of Cu-SFA complex was not relevant to variation of SFA total concentration. The geometry of ligand concentration of Cd(II) bound on SHA and PMAA was investigated with EXAFS at room temperature. The results of EXAFS data analysis indicated that the ligand coordination of Cd(II) in SHA was very similar to that of $Cd(H_2O)_6^{2+}$ whereas that in PMAA was different from that of $Cd(H_2O)_6^{2+}$.

서지기타정보

서지기타정보
청구기호 {MCH 94032
형태사항 vii, 59 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Se-Young Choi
지도교수의 한글표기 : 문희정
지도교수의 영문표기 : Hi-Chung Moon
학위논문 학위논문(석사) - 한국과학기술원 : 화학과,
서지주기 참고문헌 : p. 55-59
주제 Cadmium.
Copper.
Extended X-ray absorption fine structure.
흄산. --과학기술용어시소러스
X선 흡수 분광법. --과학기술용어시소러스
Humic acid.
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