مطالعات ترمودینامیکی و ایزوترمی حذف فنل با غربال مولکولی MCM-48

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجو

2 هیات علمی دانشگاه آزاد اسلامی واحد امیدیه

چکیده

برخی از آلاینده‌های آب و پساب با روش‌های معمول تصفیه از بین نمی‌روند، لذا باید از روش‌های جدید سازگار با محیط زیست استفاده کرد. هدف اصلی این پژوهش، بررسی کارایی حذف فنل از آب با استفاده از جاذب غربال مولکولی MCM-48 است. ابتداMCM-48 سنتز شد و پس از ارزیابی مشخصه های ساختاری آن، پارامترهای موثر برجذب سطحی مورد ارزیابی قرار گرفت. نتایج نشان داد بیشترین درصد جذب سطحی فنل در شرایط بهینه g3/0 جاذب، زمان تماس 30 دقیقه، 6pH =، غلظت فنلmg/L 5/2، دمایK 298و دور ثابتrpm 300، در حدود 88 درصد است. همچنین پارامتر ترمودینامیکی حاکی از یک فرایند جذب سطحی بصورت خود به خودی و گرما زا است. با توجه به نتایج تجربی و ضرایب همبستگی، جذب سطحی فنل از همدمای لانگمویر با ماکزیمم ظرفیت جذب 02/38 تبعیت کرده است.

کلیدواژه‌ها

عنوان مقاله [English]

Isotherm and Thermodynamic studies of Removal phenol by molecular sieve MCM-48

چکیده [English]

Abstract
Some water and wastewater pollutants cannot be eliminated with traditional treatment methods. This has encouraged workers to focus on high performance and environmentally friendly methods for their removal. The main objective of this study was to evaluate the performance of MCM-48 in phenol removal from water. MCM-48 was synthesized and the effective parameters were evaluated. The results showed that maximum absorption of phenol in optimal conditions 0.3g adsorbent, time equals 30 minutes, pH =6, concentration in 2.5 mg / L at a temperature of 298 K and constant engine speed 300 rpm at about 88 percent. The thermodynamic parameters showed an adsorption process is spontaneous and exothermic. The Langmiur model fitted well the experimental data with a maximum adsorption capacity of 38.02.

کلیدواژه‌ها [English]

  • Molecular sieve MCM-48
  • Phenol
  • Adsorption
Aguado, J., Arsuaga, J. M., Arencibia, A., Lindo, M., & Gascón, V., 2009. Aqueous heavy metals removal by adsorption on amine-functionalized mesoporous silica. Journal of Hazardous Materials 163(1), 213-221.
Anbia, M., & Mohammadi, N., 2009. A nanoporous adsorbent for removal of furfural from aqueous solutions. Desalination 249(1), 150-153.
Association, A. P. H., & Association, A. W. W., 1981. Standard methods for the examination of water and wastewater: selected analytical methods approved and cited by the United States Environmental Protection Agency: American Public Health Association.
Balcar, H., & Čejka, J., 2013. Mesoporous molecular sieves as advanced supports for olefin metathesis catalysts. Coordination Chemistry Reviews 257(21), 3107-3124.
Buckley, J. P., Herring, A. H., Wolff, M. S., Calafat, A. M., & Engel, S. M., 2016. Prenatal exposure to environmental phenols and childhood fat mass in the Mount Sinai Children's Environmental Health Study. Environment international 91, 350-356.
Cho, S., Lee, D., & Lee, Y.-S. (2015). Separation of biomass using carbon molecular sieves treated with hydrogen peroxide. Journal of Industrial and Engineering Chemistry, 21, 278-282.
Das, D., Das, N., & Mathew, L., 2010. Kinetics, equilibrium and thermodynamic studies on biosorption of Ag (I) from aqueous solution by macrofungus Pleurotus platypus. Journal of hazardous materials 184(1), 765-774.
Demim, S., Drouiche, N., Aouabed, A., Benayad, T., Couderchet, M. and Semsari, S., 2014. Study of heavy metal removal from heavy metal mixture using the CCD method. Journal of Industrial and Engineering Chemistry 20(2), 512-520.
Freundlich, H., 1906. Adsorption in solution. Z. Phys. Chemie 57, 384-470.
Huang, J.H., Huang, K.L., Liu, S.Q., Wang, A.T. and Yan, C., 2008. Adsorption of Rhodamine B and methyl orange on a hypercrosslinked polymeric adsorbent in aqueous solution. Colloids and Surfaces A: Physicochemical and Engineering Aspects 330(1), 55-61.
Istratie, R., Stoia, M., Păcurariu, C., & Locovei, C., 2016. Single and simultaneous adsorption of methyl orange and phenol onto magnetic iron oxide/carbon nanocomposites. Arabian Journal of Chemistry.
Jiang, M., Wang, K., Kennedy, J.F., Nie, J., Yu, Q. and Ma, G., 2010. Preparation and characterization of water-soluble chitosan derivative by Michael addition reaction. International journal of biological macromolecules, 47(5), 96-699.
Koutny, M., Ruzicka, J., & Chlachula, J., 2003. Screening for phenol-degrading bacteria in the pristine soils of south Siberia. Applied Soil Ecology 23(1), 79-83.
Kumar, N.S., Woo, H.S. and Min, K., 2012. Equilibrium and kinetic studies on biosorption of 2, 4, 6-trichlorophenol from aqueous solutions by Acacia leucocephala bark. Colloids and Surfaces B: Biointerfaces 94, pp.125-132.
Langmuir, I., 1918. The adsorption of gases on plane surfaces of glass, mica and platinum. Journal of the American Chemical Society 40(9), 1361-1403.
Meng, J., Cao, Y., Zheng, G., Li, J., Wu, H., Guan, X., & Zheng, X., 2014. Assembling of Al-MCM-48 supported H3PW12O40 mesoporous materials and their catalytic performances in the green synthesis of benzoic acid. Materials Research Bulletin 60, 20-27.
Namasivayam, C., Jeyakumar, R., & Yamuna, R., 1994. Dye removal from wastewater by adsorption on ‘waste’Fe (III)/Cr (III) hydroxide. Waste management 14(7), 643-648.
Özacar, M., & Şengil, İ. A., 2005. Adsorption of metal complex dyes from aqueous solutions by pine sawdust. Bioresource Technology 96(7), 791-795.
Özkaya, B., 2006. Adsorption and desorption of phenol on activated carbon and a comparison of isotherm models. Journal of hazardous materials 129(1), 158-163.  
Poots, V.J.P., Mckay, G. and Healy, J.J., 1976. The removal of acid dye from effluent using natural adsorbents—I peat. Water research 10(12), 1061-1066.
Rađenović, A., Malina, J., & Štrkalj, A., 2011. Removal of Ni (II) from aqueous solution by low-cost adsorbents. The holistic approach to environment 1(3), 109-120.
Shukla, A., Zhang, Y.-H., Dubey, P., Margrave, J., & Shukla, S. S., 2002. The role of sawdust in the removal of unwanted materials from water. Journal of hazardous materials 95(1), 137-152.
Taralkar, U. S., Kasture, M. W., & Joshi, P. N., 2008. Influence of synthesis conditions on structural properties of MCM-48. Journal of Physics and Chemistry of Solids 69(8), 2075-2081.
Trindade, P., Sobral, L., Rizzo, A., Leite, S., & Soriano, A., 2005. Bioremediation of a weathered and a recently oil-contaminated soils from Brazil: a comparison study. Chemosphere 58(4), 515-522
Uddin, M., Islam, M., & Abedin, M., 2007. Adsorption of phenol from aqueous solution by water hyacinth ash. ARPN Journal of Engineering and Applied Sciences 2(2), 11-17.
Vázquez, I., Rodriguez-Iglesias, J., Maranon, E., Castrillón, L., & Alvarez, M., 2007. Removal of residual phenols from coke wastewater by adsorption. Journal of hazardous materials 147(1), 395-400.
Yokoi, T., Yoshitake, H., & Tatsumi, T., 2004. Synthesis of amino-functionalized MCM-41 via direct co-condensation and post-synthesis grafting methods using mono-, di-and tri-amino-organoalkoxysilanes. Journal of Materials Chemistry 14(6), 951-957.
Yousef, R. I., El-Eswed, B., & Ala’a, H., 2011. Adsorption characteristics of natural zeolites as solid adsorbents for phenol removal from aqueous solutions: kinetics, mechanism, and thermodynamics studies. Chemical engineering journal 171(3), 1143-1149.
Yu, L. J., Shukla, S. S., Dorris, K. L., Shukla, A., & Margrave, J., 2003. Adsorption of chromium from aqueous solutions by maple sawdust. Journal of hazardous materials 100(1), 53-63.