Methyl orange removal from aqueous solutions by natural and treated skin almonds
- 1 October 2010
- journal article
- Published by Informa UK Limited in Desalination and Water Treatment
- Vol. 22 (1-3), 174-181
- https://doi.org/10.5004/dwt.2010.1425
Abstract
International audienceThe aim of this study was to explore the feasibility of using skin almonds (SA), a new agricultural sorbent, for the removal of hazardous dye methyl orange (MO). The fi rst objective of this work was to examine the infl uence of different chemical treatments on the adsorption capacity of SA. The treatment of SA with alkaline solution as well as with salt solution decreased the sorption ability for MO, whereas the acidic treatment increased markedly the sorption ability for the anionic dye. The next objective was to evaluate the properties of the adsorbent, the effect of the contact time, the temperature, the dye concentration and the particles size. Adsorption of the dye on both adsorbents (natural and treated) has been monitored through the Langmiur, Freundlich and Redlich-Peterson adsorption isotherm models and it was shown that the adsorption process followed as Freundlish isotherm, which led to the higher correlation coefficient. Two kinetic models, pseudo-second order and Elovich equation were employed to analyze kinetics data. It was found that the pseudo second-order was the most relevant to describe the adsorption behavior. In addition, the activation energy was also determined based on the pseudo-second order rate constantsKeywords
This publication has 24 references indexed in Scilit:
- Synthetic Textile Effluent Removal by Skin Almonds WasteJournal of Environmental Science and Technology, 2009
- Adsorption of basic dye from aqueous solution onto fly ashJournal of Environmental Management, 2008
- Studies on the adsorption kinetics and isotherms for the removal and recovery of Methyl Orange from wastewaters using waste materialsJournal of Hazardous Materials, 2007
- Equilibrium and kinetic modelling of methylene blue biosorption by pretreated dead streptomyces rimosus: Effect of temperatureChemical Engineering Journal, 2006
- Removal of Orange-G and Methyl Violet dyes by adsorption onto bagasse fly ash—kinetic study and equilibrium isotherm analysesDyes and Pigments, 2005
- Biosorption performance of Botrytis cinerea fungal by-products for removal of Cd(II) and Cu(II) ions from aqueous solutionsMinerals Engineering, 2005
- Biosorption of reactive dyes on the green alga Chlorella vulgarisProcess Biochemistry, 2004
- Application of biosorption for the removal of organic pollutants: a reviewProcess Biochemistry, 2004
- Removal of synthetic dyes from wastewaters: a reviewEnvironment International, 2004
- ‘Waste’ coir pith—a potential biomass for the treatment of dyeing wastewatersBiomass and Bioenergy, 2001