Biosorption of a model basic dye onto Pinus brutia Ten.: Evaluating of equilibrium, kinetic and thermodynamic data

• Published in: Desalination 2011-04, Vol.270 (1), p.199-205
• Main Authors: Deniz, Fatih, Karaman, Sengul, Saygideger, Saadet D.
• Format: Article
• Language: English
• Subjects: activation energy; Adsorption; Applied sciences; aqueous solutions; Basic Red 46; Biological and medical sciences; biosorbents; Biosorption; Biotechnology; Chemical engineering; Cones; desalination; Dyes; Endothermic reactions; Exact sciences and technology; Fundamental and applied biological sciences. Psychology; General purification processes; ionic strength; Mathematical models; Methods. Procedures. Technologies; Others; Pine; Pine cones; Pinus brutia; Pollution; seed cones; Sorption; sorption isotherms; Spontaneous; streams; temperature; Thermodynamics; Various methods and equipments; Waste water; wastewater treatment; Wastewaters; Water treatment and pollution
• ISSN: 0011-9164; 1873-4464
• DOI: 10.1016/j.desal.2010.11.046

The potential of pine cones as a natural biosorbent was investigated for adsorptive removal of Basic Red 46 (BR 46) from aqueous solutions. Various physico-chemical parameters were studied such as solution pH, biosorbent dosage, biosorbent size, dye concentration, temperature, contact time and ionic strength. The equilibrium data fitted well with the Langmuir isotherm. The monolayer sorption capacity was found as 73.53 mg g −1. Kinetic data were best described by the pseudo-second order model. The thermodynamic studies indicated that the biosorption reactions were spontaneous and endothermic. Activation energy was calculated as 32.33 kJ mol −1. The BR 46 was desorbed from the pine cones with 0.1 M HCl solution. The recovery for the dye was found to be higher than 90%. Thus, this study demonstrated that the pine cones could be used as a low-cost biosorbent for the treatment of the wastewater streams bearing dye. ►The monolayer sorption capacity was found as 73.53 mg g −1. ►Kinetic data were best described by the pseudo-second order model. ►The biosorption reactions were spontaneous and endothermic. ►The pine cones as a natural biosorbent may be an alternative to more costly materials.