제올라이트에 대한 수용액으로부터 brilliant green의 흡착 평형과 동역학 및 열역학 파라미터들을 다양한 초기농도(10-30 mg/L), 접촉시간(1-24 h) 및 흡착온도(298-318 K)를 변수로 하여 회분식 실험을 통하여 연구하였다. 흡착평형 값들은 Langmuir, Freundlich 및 Dubinin-Radushkevich 식으로 해석하였다. 그 결과는 Langmuir 식과 Freundlich 식에 잘 맞았으며, 평가된 Langmuir 무차원 분리계수 값(RL=0.041~0.057)와 Freundlich 상수값(1/n=0.30~0.47)은 제올라이트에 의한 brilliant green의 흡착이 효과적인 공정이 될 수 있음을 나타냈다. Dubinin-Radushkevich 식에 의해 평가된 흡착 에너지값(1.564~1.857 kJ/mol)은 물리흡착에 해당하였다. Brilliant green의 흡착 동력학은 유사이차반응속도식에 잘 맞았으며, 입자내 확산식에 잘 따랐다. 흡착 특성을 평가하기 위하여 주로 활성화에너지, Gibbs 자유에너지, 엔탈피 및 엔트로피와 같은 열역학 파라미터가 계산되었다. Gibbs 자유에너지-10.3~-11.4 kJ/mol), 엔탈피(49.48 kJ/mol) 및 활성화에너지(27.05 kJ/mol)는 흡착이 자발적이고, 흡열 및 물리흡착 공정임을 나타냈다.

Adsorption equilibrium, kinetic and thermodynamic parameters of a brilliant green from aqueous solutions at various initial dye concentration (10~30 mg/L), contact time (1~24 h) and temperature (298~318 K) on zeolite were studied in a batch mode operation. The equilibrium adsorption values were analyzed by Langmuir, Freundlich and Dubinin- Radushkevich model. The results indicate that Langmuir and Freundlich model provides the best correlation of the experimental data. Base on the estimated values of Langmuir dimensionless separation factor (RL=0.041~0.057) and Freundlich constant (1/n=0.30~0.47), this process could be employed as effective treatment method. calculated values of adsorption energy by Dubinin-Radushkevich model were 1.564~1.857 kJ/mol corresponding to physical adsorption. The adsorption kinetics of brilliant green were best described by the pseudo second-order rate model and followed by intraparticle diffusion model. Thermodynamic parameters such as activation energy, free energy, enthalpy and entropy were calculated to estimate nature of adsorption. negative Gibbs free energy (-10.3~-11.4 kJ/mol), positive enthalpy change (49.48 kJ/mol) and Arrehenius activation energy (27.05 kJ/mol) indicates that the adsorption is spontaneous, endothermic and physical adsorption process, respectively.

Brilliant green Dye adsorption Adsorption kinetic Adsorption Dye

Mane VS, Mall ID, Shrivastava VC, J. Environ. Manage., 84, 390 (2007)
LabChem Inc., “Brilliant Green Safety Data Sheet,” (2017).
Mittal A, Kaur D, Mittal J, J. Colloid Interface Sci., 326(1), 8 (2008)
Nandi BK, Goswami A, Purkait MK, J. Hazard. Mater., 161(1), 387 (2009)
Ghaedi M, Hossainian H, Montazerozohori M, Shokrollahi A, Shojaipour F, Soylak M, Purkait MK, Desalination, 281, 226 (2011)
Rehman MSU, Munir M, Ashfaq M, Rashid N, Nazar MF, Danish M, Han JI, Chem. Eng. J., 228, 54 (2013)
Salem MA, Elsharkawy RG, Hablas MF, Eur. Polym. J., 75, 577 (2016)
Barun K, Arabian J. Chem., 10(2), 2961 (2017)
Wang L, Liu W, Wang X, Chen Y, Liu S, Wang A, IEEE, RSETE, 2011, DOI: 10.1109/RSETE.2011.5965288.
Windholz M, Merck & Co. Inc., New Jersey, (1983).
LabChem, “Brilliant Green Safety Data Sheet,” (2017).
Lee JJ, Korean Chem. Eng. Res., 55(4), 514 (2017)
Mahmoudi K, Hosni K, Hamdi N, Srasra E, Korean J. Chem. Eng., 32(2), 274 (2015)
Kitakawa BH, Donghwa Technology, Seoul (2003).
Bhattacharyya KG, Sarma A, Dyes Pigment., 57, 211 (2003)
Kismir Y, Aroguz AZ, Chem. Eng. J., 172(1), 199 (2011)
Nuithitikul K, Srikhun S, Hirunpraditkoon, J. Taiwan Inst. Chem. Eng., 41, 591 (2010)
Mane VS, Babu PVV, Desalination, 273(2-3), 321 (2011)
Nethaji S, Sivasamy A, Thennarasu G, Saravanan S, J. Hazard. Mater., 181(1-3), 271 (2010)
Jain M, Garg VK, Kadirvelu K, J. Hazard. Mater., 162(1), 365 (2009)
Lee JJ, Appl. Chem. Eng., 28(2), 206 (2017)
Gercel O, Ozcan A, Ozcan AS, Gercel HF, Appl. Surf. Sci., 253(11), 4843 (2007)
Onal Y, BaSar CA, Eren D, Onalzdemir CS, Depci T, J. Hazard. Mater., B128, 150 (2006)
Nollet H, Roels M, Lutgen PV, Meeren R, Verstraete W, Chemosphere, 53, 655 (2003)
Gemeay AH, Mansour IA, El-Sharkawy RG, Zaki AB, J. Mol. Catal. A-Chem., 193(1-2), 109 (2003)
Mital A, J. Hazard. Mater., B133, 196 (2006)
Peng XM, Hu XJ, Fu DF, Lam FLY, Appl. Surf. Sci., 294, 71 (2014)