[01] Ahmed El Yacoubi, Chemical Team Materials Surfaces Interfaces, Laboratory Materials and Energetic, University Ibn Tofail, Kenitra, Morocco. [02] Nisrine Rahali, Chemical Team Materials Surfaces Interfaces, Laboratory Materials and Energetic, University Ibn Tofail, Kenitra, Morocco. [03] Driss Elmerras, Department of Mineral Chemistry, University Ibn Tofail, Kenitra, Morocco. [04] Abdellah Rezzouk, Department of Physic LPS, University Sidi Mohamed Benabdellah Dhar El Mehraz, Atlas FES, Morocco. [05] Brahim Chafik El Idrissi, Chemical Team Materials Surfaces Interfaces, Laboratory Materials and Energetic, University Ibn Tofail, Kenitra, Morocco.

Synthetic dyes are widely used in industries such as rubber, textiles, plastics, paper, and cosmetics to color their products. The effectiveness of adsorption for dye removal from wastewater has made it an ideal alternative to other expensive treatment methods. The purpose of this study was to investigate the feasibility of optimization and removal of dye Methylene Blue (MB) from aqueous solutions by using beach sand as an extremely low cost adsorbent. The sand was collected from south of Morocco. The adsorption of Methylene blue on sand has found to be dependent of contact time. Under the optimum conditions: A pH = 6.5 and T = 20°C, the sorbent could remove more than 99%. According to the results of experiments in this research, adsorption kinetic was found to adopt the pseudo-second order kinetic model, which was the best appropriate model to describe the adsorption process. The maximum adsorption capacity was found to be 0.25mg.g^-1 and a kinetic constant K₂ of 1.99 g.mg^-1min^-1. This makes it an interesting option for dye removal from aqueous solution of dye.

Wastewater, Adsorption, Methylene Blue, Natural Sand

[01] Jafari S, Zhao F, Zhao D, Lahtinen M, Bhatnagar A, Sillanpää M (2015) A comparative study for the removal of methylene blue dye by N and S modifed TiO₂ adsorbents. J MolLiq 207 (90): 8. [02] Shojaei S, Khammarnia S, Shojaei S, Sasani M (2017) Removal of reactive red 198 by nanoparticle zero valent iron in the presence of hydrogen peroxide. J Water Environ Nanotechnol 2 (2): 129–135. [03] Wang S, Boyjoo Y, Choueib A, Zhu Z (2005) Removal of dyes from aque ous solution using fy ash and red mud. Water Res 39 (1): 129 138. [04] Jorf S, Barzegar G, Ahmadi M, Soltani RDC, Takdastan A, Saeedi R, Abtahi M (2016) Enhanced coagulation photocatalytic treatment of acid red 73 dye and real textile wastewater using UVA/synthesized MgO nanoparticles. J Environ Manage 177: 111–118. [05] Holkar CR, Jadhav AJ, Pinjari DV, Mahamuni NM, Pandit AB (2016) A critical review on textile wastewater treatments: possible approaches. J Environ Manage 182: 351–366. [06] Shojaei S, Shojaei S, Sasani M (2017) The efficiency of eliminating directed 81 by zero valent iron nanoparticles from aqueous solutions using response surface Model (RSM). Model Earth Syst Environ 3 (1): 27. [07] Banerjee S, Chattopadhyaya M (2017) Adsorption characteristics for the removal of a toxic dye, tartrazine from aqueous solutions by a low cost agricultural by product. Arabian J Chem 10: S1629–S1638. [08] Mani S, Bharagava RN (2016) Exposure to crystal violet, its toxic, genotoxic and carcinogenic effects on environment and its degradation and detoxifcation for environmental safety. Rev Environ ContamToxicol 237: 71–104. [09] Yagub MT, Sen TK, Afroze S, Ang HM (2014) Dye and its removal from aqueous solution by adsorption: a review. Adv Colloid Interface Sci 209: 172–184. [10] Kushwaha, A. K., Gupta, N. and Chattopadhyaya, M. C. (2014) Removal of cationic methylene blue and malachite green dyes from aqueous solution by waste materials of Daucuscarota. Journal of Saudi Chemical Society, 18 (3): 200–207. [11] Seow TW, Lim CK (2016) Removal of dye by adsorption: a review. Int J ApplEng Res 11 (4): 2675–2679. [12] Rahmani M, Sasani M (2016) Evaluation of 3A zeolite as an adsorbent for the decolorization of rhodamine B dye in contaminated waters. J ApplChem (Semnan) 11 (41): 83–90. [13] El Bakouri H., Morillo J., Usero J., Vanderlinden E. and Vidal H. (2015). Effectiveness of acid-treated agricultural stones used in biopurification systems to avoid pesticide contamination of water resources caused by direct losses: mathematical modelling and thermodynamical study. J Environ Solut, 3, 11-18. [14] Hernández-Ramírez E., Wang J. A., Chen L. F., Valenzuela M. A. and Dalai A. K. (2017) Partial oxidation of methanol catalyzed with Au/TiO₂, Au/ZrO₂ and Au/ZrO₂-TiO₂ catalysts. Appl Surf Sci, 399, 77-85. [15] Givens B. E., Xu Z., Fiegel J. and Grassian V. H. (2017). Bovine serum albumin adsorption on SiO₂ and TiO₂ nanoparticle surfaces at circumneutral and acidic pH: A tale of two nano-bio surface interactions. J Colloid Interface, 493: 334-341. [16] Ahmad A., Razali M. H., Mamat M., Mehamod F. S. B. and Amin₂K. A. M. (2017). Adsorption of methyl orange by synthesized and functionalized-CNTs with 3-aminopropyltriethoxysilane loaded TiO₂nanocomposites. Chemosphere, 168, 474-482. [17] López-Muñoz M. J., Arencibia A., Segura Y. and Raez J. M. (2017). Removal of As (III) from aqueous solutions through simultaneous photocatalytic oxidation and adsorption by TiO2 and zero-valent iron. Catal Today, 280, Part 1, 149-154. [18] El HadjiMoussa DIOP, FalilouMbacké SAMBE, Ibrahima DIOUF, Alpha Ousmane TOURE and CodouGuéye MAR DIOP. (2017). Removal of fluoroquinolone antibiotic, ofloxacine, by adsorption on titaniferous sand. Research Journal of Chemical Sciences, 7 (11), 8-14. [19] Rafatullah, M., Sulaiman, O., Hashim, R. and Ahmad, A. 2010. Adsorption of methylene blue on low-cost adsorbents: A review. Journal of Hazardous Materials, 177 (1-3): 70-80. [20] Boyd. S. A. (1982). Soil Sci.134 (5) 377-343. [21] Sabljic A. (1989) Health Perspectives. 83 179-190. [22] Schwarzenbach, P. M. Gschwend, D. M. Imboden, Environmental Organic Chemistry. New York, John Wiley & Sons. (1992) p 681. [23] P. Duchaufour, Pédologie: Sol, Végétation, Environnement. Collection Abrégés3ème édition Paris: Masson, ISBN: 2-225-82421-5 (1991) p 289. [24] J. Cenens, R. A. Schoonheydt. (1988). Visible spectroscopy of methylene blue on hectorite, Laponite B and Barasym in aqueous suspension. Clays and Clay Minerals. 36 214-224. [25] Zolgharnein J, Rastgordani M (2018) Optimization of simultaneous removal of binary mixture of indigo carmine and methyl orange dyes by cobalt hydroxide nano particles through Taguchi method. J MolLiq 262: 405–414. [26] Han R, Zou W, Zhang Z, Shi J, Yang J (2006) Removal of copper (II) and lead (II) from aqueous solution by manganese oxide coated sand: I. Char acterization and kinetic study. J Hazard Mater 137 (1): 384–395.