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제주 스코리아로부터 합성한 제올라이트를 고분자 Polysulfone 및 PAN로 고정화한 비드에 의한 수 중 중금속 이온의 흡착 특성

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Alternative Title
Adsorption Characteristics of Heavy Metal Ions in Water by PS-syn-Zeolite and PAN-syn-Zeolite Beads Prepared via Immobilizing the Zeolite Synthesized from Jeju Scoria with Polysulfone and Polyacrylonitrile
Abstract
In order to examine the adsorption characteristics of heavy metal ions (Ni^(2+),
Zn^(2+), and Cr^(3+)) from aqueous solutions, the Jeju scoria found in large amounts
in Jeju Island, was synthesized via fusion/hydrothermal method, and the
synthesized zeolite (syn-zeolite) was immobilized with polysulfone (PS) and
polyacrlonitrile (PAN). The prepared PS-syn-zeolite beads and
PAN-syn-zeolite beads were characterized by X-ray diffraction (XRD),
Fourier-transform infrared spectrometer (FT-IR), thermo gravimetric analysis
(TGA), and scanning electron microscope (SEM). The PS-syn-zeolite beads
and PAN-syn-zeolite beads were optimal at the conditions of 1.25 g of PS
and 1.5 g of syn-zeolite, and of 1.0 g of PAN and 2.0 g of syn-zeolite,
respectively. The adsorption of Ni^(2+), Zn^(2+), and Cr^(3+) by PS-syn-zeolite beads
and PAN-syn-zeolite beads increased with time and reached to equilibrium
after 60 min for Ni^(2+) and Zn^(2+), and 90-120 min for Cr^(3+) in case of
syn-zeolite in powder state, and after 48 hr in case of PS-syn-zeolite beads
and PAN-syn-zeolite beads. The adsorption of Ni^(2+), Zn^(2+), and Cr^(3+) by
syn-zeolite, PS-syn-zeolite beads and PAN-syn-zeolite beads were fitted to
pseudo-first-order model and to Langmuir adsorption model. Each of the
maximum adsorption capacities by PS-syn-zeolite beads and PAN-syn-zeolite
beads was calculated from Langmuir isotherms as 31.35 mg/g zeolite (9.32
mg/g bead) and 33.0 mg/g zeolite (6.27 mg/g bead) for Ni^(2+), 60.24 mg/g
zeolite (16.53 mg/g bead) and 81.3 mg/g zeolite (15.77 mg/g bead) for Zn^(2+),
and 27.02 mg/g zeolite (8.1 mg/g bead) and 27.25 mg/g zeolite (4.76 mg/g
bead) for Cr^(3+). Compared theses results with those calculated for syn-zeolite
in powder state (40.32 mg/g for Ni^(2+), 119.05 mg/g for Zn^(2+), and 37.45 mg/g
for Cr^(3+)), the adsorption capacities by the former gained 78% and 82% for
Ni^(2+), 51% and 68% for Zn^(2+), and 72% and 73% for Cr^(3+), respectively. Each of
the distribution coefficients (K_(d)) of Ni^(2+), Zn^(2+), and Cr^(3+) in the presence of
coexisting ions (Na^(+), K^(+), Ca^(2+), Mg^(2+)) by PS-syn-zeolite beads and
PAN-syn-zeolite beads was 5.1 times, 8.6 times and 4.0 times and more,
compared with those of coexisting ions, indicating that the removal of the
former in the presence of the latter by PS-syn-zeolite beads and
PAN-syn-zeolite beads carries out more selectively. Finally, any sign of
zeolite leakage or damage of the beads was not detected even after five
adsorption-desorption cycles, while the adsorption capacities of Ni^(2+), Zn^(2+), and
Cr^(3+) by PS-syn-zeolite beads and PAN-syn-zeolite beads were stably
maintained.
Author(s)
김정태
Issued Date
2016
Awarded Date
2016. 8
Type
Dissertation
URI
http://dcoll.jejunu.ac.kr/jsp/common/DcLoOrgPer.jsp?sItemId=000000007815
Alternative Author(s)
Kim, Jung-Tae
Department
대학원 환경공학과
Advisor
감상규
Table Of Contents
1. 서 론 1
2. 이론적 고찰 3
2.1 제올라이트 3
2.1.1. 제올라이트의 구조와 특성 3
2.1.2. 제올라이트의 용도 4
2.2. 제주 스코리아 4
2.3. 흡착제(이온교환체)의 고정화 방법 6
2.3.1. 가두기(matrix entrapped) 7
2.3.2. 캡슐화(encapsulated) 7
2.3.3. 흡착(adsorbed) 7
2.3.4. 공유 결합(covalently bound) 8
2.4. 제올라이트에 의한 중금속 이온의 흡착 9
2.4.1. 중금속 이온의 흡착이론 9
2.4.2. 중금속 이온의 흡착속도 10
2.5. 용액 중 중금속(Ni2+, Zn2+ 및 Cr3+)의 흡착에 관한 선행 연구 사례 11
3. 실험 재료 및 방법 13
3.1. 실험 재료 13
3.2. PS-제올라이트, PAN-제올라이트 비드 제조 13
3.3. 특성 분석 16
3.4. 중금속 이온 흡착 실험 16
4. 결과 및 고찰 18
4.1. 특성 분석 18
4.1.1. XRD 분석 18
4.1.2. FT-IR 분석 20
4.1.3. TGA 분석 23
4.1.4. SEM 분석 25
4.2. 비드의 합성 조건 27
4.3. 중금속 이온 흡착에 미치는 반응 인자의 영향 30
4.3.1. 접촉 시간의 영향 30
4.3.2. pH의 영향 35
4.3.3. 공존이온의 영향 37
4.4. 중금속 흡착 파라미터의 산출 42
4.4.1. pH의 영향 42
4.4.2. 흡착 등온식 53
4.5. 비드의 재사용 58
5. 결론 60
참고문헌 62
Degree
Master
Publisher
제주대학교 대학원
Citation
김정태. (2016). 제주 스코리아로부터 합성한 제올라이트를 고분자 Polysulfone 및 PAN로 고정화한 비드에 의한 수 중 중금속 이온의 흡착 특성
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