Adsorption Mechanism of Basic Red-12 over Eucalyptus Bark and Its Surface Derivatives

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• 作者：Ekta Khosla ; Satindar Kaur ; Pragnesh N. Dave
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2012
• 出版时间：July 12, 2012
• 年：2012
• 卷：57
• 期：7
• 页码：2004-2011
• 全文大小：558K
• 年卷期：v.57,no.7(July 12, 2012)
• ISSN：1520-5134

文摘

The adsorption behavior of Basic Red-12 on eucalyptus bark (EB) and its surface derivatives obtained after cationic, anionic, and nonionic surfactant treatment in aqueous solution has been investigated to understand the physicochemical process involved and to explore the potential use of low-cost materials in textile effluent treatment and management. The results revealed that cationic, anionic, and nonionic surfactant modified EB can remove Basic Red-12 dye up to (243.6, 923.0, and 193.28) mg路g^鈥?, respectively, while raw EB can remove dye up to 146.8 mg路g^鈥? only at 303 K. The adsorption process is found to be pH-dependent, and the optimum pH obtained is 2 to 5. The equilibrium was established in 2 h for EB and in 5 h for surface-modified EB. The process obeys the Langmuir and Freundlich models. Scanning electron microscopic analysis reveals a conspicuous surface morphology change after surfactant modification. The results of Fourier transform infrared (FTIR) spectroscopy reveal that the process is electrostatic complexation mechanism driven. The kinetic measurements suggest Lagergren kinetic processes. The thermodynamical measurements suggest that all processes are exothermic accompanied with negative 螖G^o, 螖H^o, and 螖S^o.