High Adsorption Efficiency of Topkhana Natural Clay for Methylene Blue from Medical Laboratory Wastewater: a Linear and Nonlinear Regression
- 1 Downloads
Local natural clay from Topkhana (Sulaimani district, Kurdistan region of Iraq) was characterized with XRD, XRF, FT-IR, and gas adsorption analyzer. The clay sample was dominated by saponite with minor amounts of chlorite. The clay was examined for its efficiency to adsorb and remove methylene blue (MB) from clinical laboratory wastewater by a batch method. The effects of pH, temperature, clay dosage, and initial MB concentration on the adsorption efficiency were investigated. The equilibrium experimental data were analyzed using Langmuir, Freundlich, Temkin, and Redlich-Peterson (R-P) isotherms. Most of the MB adsorption could be explained by cation exchange. The saponite, therefore, was the most important component in the clay. The rate of the adsorption process was found to follow pseudo-second-order kinetics. The conventional linear least squares method was compared with the more accurate method of non-linear curve fitting for the determination of isotherm and kinetic model parameters. Two error functions (the sum of the squared residuals and the correlation of determination) were used to evaluate the linear and non-linear regression analysis applied to the experimental data. Equilibrium thermodynamic parameters indicated a spontaneous and endothermic adsorption process.
KeywordsNatural clay Saponite Methylene blue Clinical laboratory Adsorption isotherm Nonlinear fitting
Unable to display preview. Download preview PDF.
This study has not been financed by any government or private funding agencies. We gratefully acknowledge Federal Institute for Geosciences and Natural Resources (BGR), for the support and their assistance and all who contributed to conduction of this study.
- 3.Miclescu A, Wiklund L (2010). Methylene blue , an old drug with new indications ? 17:35–41Google Scholar
- 4.Mirrett S, Lauer BA, Miller GA, Reller LB (1982) Orange, Methylene Blue. Cultures 15:562–566Google Scholar
- 6.Lachheb H, Puzenat E, Houas A, Ksibi M, Elaloui E, Guillard C, Herrmann JM (2002) Photocatalytic degradation of various types of dyes (alizarin S, Crocein Orange G, methyl red, Congo red, methylene blue) in water by UV-irradiated titania. Appl Catal B Environ 39:75–90. https://doi.org/10.1016/S0926-3373(02)00078-4 CrossRefGoogle Scholar
- 8.Deng H, Yang L, Tao G, Dai J (2009) Preparation and characterization of activated carbon from cotton stalk by microwave assisted chemical activation-application in methylene blue adsorption from aqueous solution. J Hazard Mater 166:1514–1521. https://doi.org/10.1016/j.jhazmat.2008.12.080 CrossRefGoogle Scholar
- 13.Bao Y, Zhang G (2012) Energy Procedia Study of Adsorption Characteristics of Methylene Blue onto Activated Carbon Made by Salix Psammophila 16:1141–1146. https://doi.org/10.1016/j.egypro.2012.01.182
- 14.Taylor P, Sarma GK, Sengupta S, et al (2011) Separation Science and Technology Methylene Blue Adsorption on Natural and Modified Clays Methylene Blue Adsorption on Natural and Modified Clays. 37–41. https://doi.org/10.1080/01496395.2011.565012
- 19.Dohrmann R, Genske D, Karnland O, Kaufhold S, Kiviranta L, Olsson S, Plötze M, Sandén T, Sellin P, Svensson D, Valter M (2012) Interlaboratory CEC and exchangeable cation study of bentonite buffer materials: I. Cu(II)-triethylenetetramine method. Clay Clay Miner 60:162–175. https://doi.org/10.1346/CCMN.2012.0600206 CrossRefGoogle Scholar
- 25.Jemima WS, Magesan P, Chiranjeevi P, Umapathy MJ (2018) Sorption properties of Organo modified montmorillonite clay for the reclamation of chromium (VI) from waste water. Silicon:1–9. https://doi.org/10.1007/s12633-018-9887-z
- 35.Sakin O, Ali M, Hussein BHM, Mgaidi A (2017) Adsorption thermodynamics of cationic dyes ( methylene blue and crystal violet ) to a natural clay mineral from aqueous solution between 293 and 15. Arab J Chem. https://doi.org/10.1016/j.arabjc.2017.10.007
- 36.Elmoubarki R, Mahjoubi FZ, Tounsadi H, Moustadraf J, Abdennouri M, Zouhri A, el Albani A, Barka N (2015) Adsorption of textile dyes on raw and decanted Moroccan clays: kinetics, equilibrium and thermodynamics. Water Resour Ind 9:16–29. https://doi.org/10.1016/j.wri.2014.11.001 CrossRefGoogle Scholar
- 38.Shabani E, Salimi F, Jahangiri A (2018) Removal of arsenic and copper from water solution using magnetic Iron/bentonite nanoparticles (Fe3O4/bentonite). Silicon:1–11. https://doi.org/10.1007/s12633-018-9895-z