활성탄을 이용한 아조벤젠 염료 폐수의 흡착 특성에 관한 기초연구: 흡착평형, 동력학 그리고 열역학적 연구
Fundamental Studies for the Adsorption Feature of Azobenzene from Water onto Activated Carbon: Adsorption Equilibrium and Kinetic Studies and Thermodynamic Parameters
- 주제(키워드) Azobenzene , Adsorption , Activated Carbon , Reaction Kinetics , Thermodynamic Parameters , Adsorption Equilibrium
- 주제(기타) 토목공학
- 설명문(URI) https://www.kci.go.kr/kciportal/ci/sereArticleSearch/ciSereArtiView.kci?sereArticleSearchBean.artiId=ART001926703
- 등재 KCI등재
- 발행기관 한국수처리학회
- 발행년도 2014
- URI http://www.dcollection.net/handler/ewha/000000237840
- 본문언어 한국어
초록/요약
The adsorption of Azo dye Azobenzene onto granular activated carbon(GAC) has been studied. We investigated various physicochemical parameters such as reaction temperature, initial pH, initial dye concentration and pre-treatment by HCl and NaOH to achieve maximum adsorption. The adsorption reached at the equilibrium state about 3 h from the beginning of the experiments. With varying the initial dye concentrations, the results showed that the adsorption capacity increased as the initial concentration increased along with reaction temperature. The kinetic studies indicated that the adsorption process followed the pseudo-second-order kinetic model(). The equilibrium adsorption data were analyzed by Langmuir and Freundlich models. The results indicate that the Freundlich model provides the best correlation(=0.984) of the experimental data. The thermodynamic parameters were also determined. The enthalpy change of adsorption was 10.38kJ/mol. Adsorption rate increased for the activated carbon pretreated with increasing concentration of HCl. But, Increasing concentration of NaOH made adsorption rate decreased. Adsorption increased with decreases in solution pH and increase in solution ionic strength.
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