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아민기로 수식된 수용성 유기점토의 합성과 말라카이트 그린과의 제거거동

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Author(s)
김의진
Issued Date
2010
Keyword
malachite green|AMP clay|organo clay
Abstract
Malachite green (4-[(4-dimethylaminophenyl)-phenyl-methyl]-N,N- dimethyl-aniline, MG), aniline green, basic green 4) is known to a toxic chemical widely used as a dye. Historically malachite green was determined as health risk to humans who eat fish contaminated with that. In addition, the United States Food and Drug Administration (FDA), detected MG in seafood imported by China, has banned in 2006 year. As a result, the development for removal techniques of MG is required. In this work, the potential feasibility of organic nanoclay which has capability for long-term trapping of MG was investlaated. Among various organic clays, aminopropyl-functionalized magnesium phyllosilicate (AMP) clay was selected due to higher solubility (dispersity) in aqueous media. This organoclay, which was initially prepared as a bulk precipitate by room temperature where hydrolysis/condensation of 3-aminopropyltriethoxysilane in ethanolic solution of MgCl2, consists of stacked sheets of a talc-like phyllosilicate with covalently attached aminopropyl groups that extend into the intarlamellar spaces. Prepared AMP clay was confirmed by X-ray diffraction. The operating variables through initial dye concentration, AMP clay dosage, initial solution pH, and temperature with MG removal were studied to equilibrium/kinetic and thermodynamic phenemina in this system. Removal of MG showed that the process was cationic exchange mechanism between magnesium ions and MG removal was strongly pH-dependent. The maximum removal percentage was obtained from pH 5 to 10. The equilibrium process was described by the Langmuir isotherm model. Maximum sorption capacity by AMP clay was to be 227.42 mg/g at pH 10.5 and room temperature. The kinetics of MG sorption on AMP clay followed the Lagergren’s pseudo-first-order model. The thermodynamics parameters of activation of Gibbs free energy, enthalpy and entropy were evaluated according to 20, 40, 60 ˚C. We found that ΔG, ΔH, and ΔS are 334.14 kJ/mol, 47.74 kJ/mol, and -0.97695 kJ/(K⦁mol) at 20 ℃ 353.28 kJ/mol, 47.58 kJ/mol, and -0.97621 kJ/(K⦁mol) at 40 ℃ 373.40 kJ/mol, 47.41 kJ/mol, -0.97849 kJ/(K⦁mol) at 60 ℃ respectively.
Alternative Title
Synthesis of amine group-functionalized, water-dissolved organoclay and its removal behavior with malachite green
Alternative Author(s)
Eui Jin Kim
Department
일반대학원 화학공학과
Advisor
신현재
Awarded Date
2010-08
Table Of Contents
목 차

List of Tables ⅲ
List of Figures ⅳ
Abstract ⅵ

제 1 장 서 론 1
제1절 Aminopropyl functionalized magnesium phyllosilicate (AMP clay) 1
제2절 Sol-gel method 9
제3절 Malachite green (MG) 12
제4절 연구내용 및 목적 15

제 2 장 문헌조사 16

제 3 장 실 험 18
제1절 실험재료 18
제2절 AMP clay 의 합성 18
제3절 분석 19
1. Ultraviolet visible (UV-vis) spectrophotometer 19
2. Elemental analyzer (EA) 19
3. Inductively coupled plasma atomic emission spectroscopy (ICP-AES) 19
4. 29Si solid nuclear magnetic resonance (Si-NMR) 20
5. Ion chromatography (IC) 20
6. Fourier transform infrared spectroscopy (FT-IR) 20
7. Scanning electron microscope (SEM) 20
8. Transmission electron microscope (TEM) 21
9. X-ray diffraction (XRD) 21

제 4 장 결과 및 고찰 22
제1절 pH에 의한 제거 22
제2절 제거속도론 27
제3절 등온 흡착제거 34
제4절 열역학적 해석 36
제5절 말라카이트그린의 제거 메카니즘 제안 40

제 5 장 결과 51

참고문헌 53
Degree
Master
Publisher
조선대학교 대학원 화학공학과
Citation
김의진. (2010). 아민기로 수식된 수용성 유기점토의 합성과 말라카이트 그린과의 제거거동.
Type
Dissertation
URI
https://oak.chosun.ac.kr/handle/2020.oak/8751
http://chosun.dcollection.net/common/orgView/200000240201
Appears in Collections:
General Graduate School > 3. Theses(Master)
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