수중의 구리 제거를 위한 질석흡착제의 표면개질 연구

국문 초록 (Abstract)

본 연구는 팽창질석에 글리세롤과 황산으로 코팅하여 580℃에서 가열시킨 코팅질석(MEVs)을 사용해 수용액 상의 구리이온을 더 효과적으로 흡착제거 할 수 있는가를 평가하고자 하였다. 수용액 상의 구리이온의 제거양상을 살펴보기 위해 batch kinetic test와 batch sorption test가 실시되었다. 그 결과, 구리 제거속도(Kobs, 1/hr)는 MEVs가 1g(25g/L)일 때 0.579, 2g(50g/L)일 때 0.878, 3g(75g/L)일 때 3.459, 4g(100g/L)일 때 6.578이었고, 초기pH는 3.26이었다. 농도에 따른 제거실험에서 구리 제거속도는 3mg/L일 때 1.96, 5mg/L일 때 1.375, 8mg/L일 때 1.25, 10mg/L일 때 1.04었고, 초기 pH는 각각 3.46, 3.26, 3.10, 2.96이었다. 초기 pH에 따른 구리의 제거속도는 pH 3～pH 5에서 0.263～0.525의 범위를 보였다. 이 결과는 초기구리농도와는 반비례하고 초기 pH와는 비례하는 양상을 보였다. Batch sorption test에서 Langmuir 모델의 최대 흡착용량(Qmax)과 Linear, Freundlich 모델의 분배계수는 각각 0.761mg/g, 0.494L/g, 0.729L/g(1/n = 0.476)였다. 이 결과는 글리세롤 코팅질석이 여러 형태의 수용액에 존재하는 구리이온을 효과적으로 제거할 수 있다는 것을 보여준다.

다국어 초록 (Multilingual Abstract)

The main objective of this study was to evaluate the removal properties of Cu from existing exfoliated vermiculite (EV) coated with a mixed solution of sulfuric acid and glycerol on the 580℃ in heating, which uses coated with glycerol of copper ions can be removed more effectively. Serial batch kinetic tests and batch sorption tests were conducted to determine the removal characteristics for Cu in aqueous solution. The result of batch kinetic test shows that removal rate, Kobs (1/hr), of Cu are 0.579, 0.878, 3.459, and 6.578 for MEV weight 1 g (25 g/L), 2 g (50 g/L), 3 g (75 g/L), 4 g (100 g/L), respectively. In this case the initial pH of the solution was 3.26. The removal experiment according to the concentration, Kobs (1/hr), of Cu are 1.96, 0.878, 1.25, and 1.04 for the initial concentration of 3 mg/L, 5 mg/L, 8 mg/L, 10 mg/L, and the initial pH of the solution are 3.46, 3.26, 3.10, 2.96, respectively. Influence of initial pHs on Cu removal were tested under 1g of MEV with 5 mg/L of Cu solution. Kobs (1/hr) were increased from 0.263 (pH 3) to 0.525 (pH 5). It leads to the conclusion that the removal rates are inversely proportional to the initial Cu concentration and are increased proportional to the initial pHs. Sorption capacity of MEV was determined by batch sorption tests. The maximum sorption capacity (Qmax) obtained from Langmuir was 0.761 mg/g, Linear and Freundlich partition coefficients were 0.494 L/g and 0.729 L/g (1/n = 0.476). These results show that the MEV could be used as an excellent adsorbent for copper contained in various types of aqueous solutions.

목차 (Table of Contents)

• ABSTRACT
• 요지
• 1. 서론
• 2. 실험 재료 및 방법
• 3. 실험 결과 및 고찰
• 4. 결론
• References

참고문헌 (Reference)

1 이준기, "팽창질석을 이용한 중금속 흡착제거에 관한 연구" 한국지반환경공학회 10 (10): 61-68, 2009

2 송재홍, "팽창질석에 의한 수용액내의 구리 제거능 평가" 한국지반환경공학회 10 (10): 25-32, 2009

3 최익원, "참깨 부산물 Biochar의 중금속 흡착특성" 한국토양비료학회 46 (46): 8-15, 2013

4 엄태호, "점토광물에 의한 중금속 흡착 특성" 한국세라믹학회 39 (39): 663-668, 2002

5 권용삼, "굴패각과 플라이애쉬에 대한 중금속의 흡착특성" 한국폐기물자원순환학회 20 (20): 337-345, 2003

6 양재규, "pH를 달리하여 제조한 3가철 첨착 활성탄에 의한 구리 제거특성 평가" 대한환경공학회 30 (30): 345-351, 2008

7 Kim, K. H., "Treatment of acid mine drainage water using wasted sludge of seafood processing factory and starfish" 24 (24): 489-497, 2002

8 Koppensteiner, B., "The degradation of the herbicides alachlor and metolachlor by iron metal in water and soil systems" University of Wisconsin Madison 1998

9 Medeiros, M., "Modification of vermiculite by polymerization and carbonization of glycerol to produce highly efficient materials for oil removal" 45 (45): 213-219, 2009

10 El-Bayaa, A. A., "Effect of ionic strength on the adsorption of copper and chromium ions by vermiculite pure clay mineral" 170 (170): 1204-1209, 2009

11 Aziz, A., "Chemically modified olive stone:alow-cost sorbent for heavy metals and basic dyes removal from aqueous solutions" 163 (163): 441-447, 2009

12 Owamah, H., "Biosorptive removal of Pb(II) and Cu(II)from wastewater using activated carbon from cassava peels" 16 (16): 347-358, 2014

13 Aguado, J., "Aqueous heavy metals removal by adsorption on amine-functionalized mesoporous silica" 163 (163): 213-221, 2009

14 Sarı, A., "Adsorption of silver from aqueous solution onto raw vermiculite and manganese oxide-modified vermiculite" 170 : 155-163, 2013

15 Boujelben, N., "Adsorption of nickel and copper onto natural iron oxide-coated sand from aqueous solutions: study in single and binary systems" 163 (163): 376-382, 2009

16 Malandrino, M., "Adsorption of heavy metals on vermiculite:influence of pH and organic ligands" 299 (299): 537-546, 2006