Rathod, Manali and Haldar, Soumya and Shaik, Basha (2015) Nanocrystalline cellulose for removal of tetracycline hydrochloride from water via biosorption: Equilibrium, kinetic and thermodynamic studies. Ecological Engineering, 84. pp. 240-249. ISSN 0925-8574

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Abstract

tCrystalline nanocellulose, synthesized from green seaweed, Ulva lactuca, was investigated for the sorptionof tetracycline hydrochloride (TC) from aqueous solutions. The effects of pH, contact time, concentra-tion of TC and desorption were studied in batch mode. The kinetics of TC biosorption was very fastand reached equilibrium in almost 2 h. The kinetic data was well described by double exponentialand the pseudo-second-order kinetic models. Film diffusion is the rate-limiting step for the biosorp-tion of TC on to crystalline nanocellulose. Both Redlich–Peterson (R–P) and Polanyi–Manes (P–M)isotherm models described the equilibrium data well. The values of maximum sorption capacities(6.48–7.73 mg/g for R–P and 6.57–7.96 mg/g for P–M models) increased with temperature. A ther-modynamic study (�H◦= 22.64 kJ/mol, �S◦= 9.85 kJ/(mol/K)) demonstrated that biosorption of TC isspontaneous, endothermic and an entropy-driven process. The reusability of sorbent was achieved byHNO3(5 w/w%) with desorption efficiency of 95.20% in 4 h. The overall results have significant implica-tions for the removal of TC from aqueous solution with crystalline nanocellulose.

Item Type:	Article
Uncontrolled Keywords:	Crystalline nanocellulose;Biosorption;Tetracycline Hydrochloride;Kinetics;Isotherma
Subjects:	Industrial Wastewater Treatment & Disposal Chemistry, Chemical Technology
Divisions:	UNSPECIFIED
Depositing User:	Dr. Basha Shaik
Date Deposited:	31 Dec 2015 05:43
Last Modified:	31 Dec 2015 05:43
URI:	http://neeri.csircentral.net/id/eprint/559

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