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pp.743-751
The objective of this study was to investigate the adsorption potential of chicken feathers for the removal of OrangeⅡ (AO7) from aqueous solutions. Batch experiments were performed as a function of different experimental parameters such as initial pH, reaction time, feather dose, initial OrangeⅡ concentration and temperature. The highest OrangeⅡ uptake was observed at pH 1.0. Most of the OrangeⅡ was adsorbed at 2 h and an adsorption equilibrium was reached at 6 h. As the amount of chicken feather was increased, the removal efficiency of Orange II increased up to 99%, but its uptake decreased. By increasing the initial concentration and temperature, OrangeⅡ uptake was increased. The experimental adsorption isotherm exhibited a better fit with the Langmuir isotherm than with the Freundlich isotherm, and maximum adsorption capacity from the Langmuir constant was determined to be 0.179244 mmol/g at 30℃. The adsorption energy obtained from the Dubinin-Radushkevich model was 7.9 kJ/mol at 20℃ and 30℃ which indicates the predominance of physical adsorption. Thermodynamic parameters such as ΔGo, ΔHo, and ΔSo were -12.28 kJ/mol, 20.64 kJ/mol and 112.32 J/mol K at 30℃, respectively. This indicates that the process of OrangeⅡ adsorption by chicken feathers was spontaneous and endothermic. Our results suggest that as a low-cost biomaterials, chicken feather is an attractive candidate for OrangeⅡ removal from aqueous solutions.
1. 서 론
2. 재료 및 방법
2.1. 사용 재료
2.2. 실험 방법
2.3. 결과 해석
3. 결과 및 고찰
3.1. 초기 pH에 따른 OrangeⅡ 흡착능
3.2. 반응시간에 따른 OrangeⅡ 흡착능
3.3. 우모 첨가량에 따른 OrangeⅡ 흡착능
3.4. OrangeⅡ 농도와 반응온도에 따른 흡착능
3.5. 흡착등온식
3.6. 열역학적 해석
4. 결 론
REFERENCES
