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Title: Biosorption of acid dye in single and multidye systems onto sawdust of locust bean (parkia biglobosa) tree
Authors: Giwa, Abdur-Rahim Adebisi 
Abdulsalam, Khadijat Ayanpeju 
Wewers, Francois 
Oladipo, Mary Adelaide 
Keywords: Parkia biglobosa;Acid dye;Sawdust
Issue Date: 2016
Publisher: Journal of Chemistry
Source: Abdur-Rahim Adebisi Giwa, Khadijat Ayanpeju Abdulsalam, Francois Wewers, and Mary Adelaide Oladipo, “Biosorption of Acid Dye in Single and Multidye Systems onto Sawdust of Locust Bean (Parkia biglobosa) Tree,” Journal of Chemistry, vol. 2016, Article ID 6436039, 11 pages, 2016. doi:10.1155/2016/6436039
Abstract: binary, and ternary dye systems with Rhodamine B and Methylene Blue dyes in aqueous solution, were investigated. The sawdust was characterized using Scanning Electron Microscopy, Fourier Transform Infrared spectrophotometry, X-ray diffraction, and pH point of zero charge. Batch adsorption experiments were carried out to determine the equilibrium characteristics, thermodynamics, and kinetics of the sorption processes. The data obtained were subjected to various isotherm and kinetics equations. The results showed that the adsorption processes were described by different isotherm models depending on the composition of the system; they were all spontaneous ( ranges from −0.72 to −5.36 kJ/mol) and endothermic (range of is 11.37–26.31 kJ/mol) and with increased randomness with values of 55.55 and 98.78 J·mol/K for single and ternary systems, respectively. Pseudo-second-order kinetics model gave better fit for all the sorption systems studied irrespective of the differences in composition, with the initial and overall rate constants higher for the mixtures than for the single system (6.76 g·mg−1min−1). The presence of Rhodamine B and Methylene Blue had a synergetic effect on the maximum monolayer capacity of the adsorbent for Acid Blue 161 dye.
Appears in Collections:Appsc - Journal Articles (DHET subsidised)

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