Effects of Heating Pretreatments and pH on Removal Efficiency of Cadmium, Cobalt and Zinc from Multi-Ionic Solutions using Sepiolite Mineral
Subject Areas : environmental managementRamin Samiei Fard 1 , Ahmad Landi 2 , Saeid Hojati 3 , Nahid Pourreza 4
1 - MSc Student, Department of Soil Science, College of Agriculture, Shahid Chamran University of Ahvaz, Iran
2 - - Professor, Department of Soil Science, College of Agriculture, Shahid Chamran University of Ahvaz, Iran.
3 - Associate Professor, Department of Soil Science, College of Agriculture, Shahid Chamran University of Ahvaz, Iran.
* (Corresponding Author)
4 - Professor, Department of Soil Science, College of Agriculture, Shahid Chamran University of Ahvaz, Iran.
Keywords: Sepiolite, Kinetic, Cd, CO, Zn,
Abstract :
Background and Objective: Due to electrical charge and high specific surface area, clay minerals, such as sepiolite, are widely used for the removal of heavy metals from environment. However, limited information is available to identify their ability for heavy metals removal from multi-ionic solutions. This study was conducted to determine the ability of Fariman sepiolite for the removal of Cd, Co, and Zn from aqueous solutions, and the effect of different factors, such as contact time and initial solution pH, as well as application of heating pretreatments (150 and 250 Cᵒ) on adsorption process of the mentioned elemnts. . Method: All the experiments were done in 11 contact times from 5 to 2880 minutes, in three replications and at pH values of 4 and 5. After determining the remained amounts of each heavy metal in the centrifuged suspension solutions by atomic absorption machine, the experimental data were fitted by pseudo first order, pseudo second order, and intraparticle diffusion kinetic models. Findings: The results showed that the adsorption potential of the heavy metals depended on contact time, solution pH, and physicochemical characteristics of the elements. Accordingly, by increasing the contact time and pH of solutions, adsorption rate of the heavy metals increased in an order of Co>Zn>Cd. Moreover, the results illustrated that application of heat treated sepiolite particles, compared to natural sepiolite, increases the removal efficiency of the heavy metals from aqueous solutions. Conclusion: Results illustrated that application of heating pretreated sepiolite leads to greater removal of heavy metals in the solutions studied. Besides, greater efficiency in removal of heavy metals would be attained in pH= 5 as compared to pH=4.
1- Velde B., Introduction to clay minerals, chemistry, origins, uses and invironmental significance. London, 1992.
2- Garcia-Sanchez A, Alastuey A, Querol X, Heavy metal adsorption by different minerals: application to the remediation of polluted soils. Science of the Total Environment, (1999); 242: 179–88.
3- Janos P, Vavrova J, Herzogova L, Pilaaova V, Effects of inorganic and organic amendments on the mobility (leachability) of heavy metals in contaminated soil: A sequential extraction study. Geoderma, (2010); 159: 335–41.
4- Kocaoba S, Adsorption of Cd (II), Cr (III) and Mn (II) on natural sepiolite. Desalination, (2009); 244: 24–30.
5- Sabah E, Turan M, Celik MS, Adsorption mechanism of cationic surfactants onto acid- and heat-activated sepiolites. Water Research, (2002); 36: 3957–3964.
6- Asci Y, Nurbas M, Acikel YS, Sorption of Cd (II) onto kaolinite as a soil component and desorption of Cd(II) from kaolin using rhamnolipid biosurfactant. Journal of Hazardous Material, (2007); 139: 50–6.
7- Lazarević S, Janković-Častvan I, Jovanović D, Milonjić SC, Janaćković D, Petrović R, Adsorption of Pb2+, Cd2+ and Sr2+ ions onto natural and acid-activated sepiolite. Applied Clay Science, (2007); 37: 47–57.
8- Hojati S, Khademi H, Cadmium sorption from aqueous solutions onto an Iranian sepiolite: Kinetics and isotherms. Journal of Central-South University, (2013); 20: 3627-32.
9- Hojati S, Khademi H, Physicochemical and mineralogical characteristics of sepiolite deposits of northeastern Iran. Ulum-e-Zamin, (2013); 23 (90): 165-174.
10- Summer ME, Miller WP, Cation exchange capacity and exchange coefficients. In: Bartels, J. M., and Bigham, J.M. (eds.), Methods of Soil Analysis Part 3: Chemical Methods. Soil Science Society of America and America Society of Agronomy, Madison, WI, USA. (1996); pp. 1201-1231.
11- Carter DL, Mortland MM, Kemper WD, Specific surface. In: Klute, A. (ed.), Methods of Soil Analysis Part 1: Physical and Mineralogical Methods. Soil Science Society of America and American Society of Agronomy, Madison, WI, USA. (1996); pp. 413-423.
12- Wang W, Chen H, Wang A, Adsorption characteristics of Cd (II) from aqueous solution onto activated palygorskite. Separation and Purification Technology (2007); 55: 157–64.
13- Lagergren S, About the theory of so-called adsorption of soluble substance Kungliga Svenska Vetenskaps Akademiens Handlingar, (1898); 24: 1-39.
14- Ho YS, McKay G, Kinetic models for the sorption of dye from aqueous solution by wood. Journal of Environmental Science Part B, (1998); 76: 183-91.
15- Weber JR, Morris JC, Kinetics of adsorption on carbon from solutions. Journal of the Sanitary Engineering Division, American Society of Civil Engineering, (1963); 89: 31-60.
16- Bektas N, Akman Agim B, Kara S, Kinetic and equilibrium studies in removing lead ions from aqueous solutions by natural sepiolite. Journal of Hazardous Materials, (2004); B112: 115–22.
17- Guerra DL, Batista AC, Correa da Costa PC, Viana RR, Airoldi C, Adsorption of arsenic ions on Brazilian sepiolite: Effect of contact time, pH, concentration, and calorimetric investigation. Journal of Colloid and Interface Science, (2010); 346: 178–87.
18- Kilislioglu A, Aras G, Adsorption of uranium from aqueous solution on heat and acid treated sepiolites. Applied Radiation and Isotopes, (2010); 68: 2016–19.
19- Sdiri A, Higashi T, Hatta T, Jamoussi F, Tase N, Evaluating the adsorptive capacity of montmorillonitic and calcareous clays on the removal of several heavy metals in aqueous systems. Chemical Engineering Journal, (2011); 172: 37-46.
20- Kubilay S, Gürkan R, Savran A, Sahan T, Removal of Cu(II), Zn(II) and Co(II) ions from aqueous solutions by adsorption onto natural bentonite Adsorption, (2007); 13: 41–51.
21- Eloussaief M, Benzina M, Efficiency of natural and acid-activated clays in the removal of Pb (II) from aqueous solutions. Journal of Hazardous Materials, (2010); 178: 753-757.
22- Guptaa S, Krishna GB, Immobilization of Pb(II), Cd(II) and Ni(II) ions on kaolinite and montmorillonite surfaces from aqueous medium. Journal of Environmental Management, (2008); 87: 46–58.
23- Sparks D, Environmental Soil Chemistry. Academic Press, New York, (1995) 352 p.
24- Kubilay S, Gürkan R, Savran A, Sahan T, Removal of Cu(II), Zn(II) and Co(II) ions from aqueous solutions by adsorption onto natural bentonite. Adsorption, (2007) 13; 41–51.
25- Yuzer H, Kara M, Sabah E, Sabri CM, Contribution of cobalt ion precipitation to adsorption in ion exchange dominant systems. Journal of Hazardous Materials (2008); 15: 33–37.
26- Brigatti MF, Lugli C, Poppi L, Kinetics of heavy-metal removal and recovery in Sepiolite. Applied Clay Science, (2000) 16: 45–57.
27- Vieira dos Santos AC, Masini JC, Evaluating the removal of Cd(II), Pb(II) and Cu(II) from a wastewater sample of coating industry by adsorption onto vermiculite. Applied Clay Science, (2007); 37: 167-174.
28- Asthagiri D, Pratt LR, Paulaitis ME, Rempe SB, Hydration structure and free energy of biomolecularly specific aqueous dictations, including Zn2+ and first transition row metals. Journal of American Chemical Society, (2004); 126 (4): 1285-89.
29- Gonzalez-Pradas E, Socias-Viciana M, Urena-Amate MD, Cantos-Molina A, Villafranca-Sanchez M, Adsorption of chloridazon from aqueous solution on heat and acid treated sepiolites. Water Research, (2005); 39: 1849–57.
30- Miura A, Nakazawa K, Takei T, Kumada N, Kinomura RON, Koshiyama H, Acid, base, and heat-induced degradation behavior of Chinese sepiolite. Ceramics International, (2012); 5075: 1-8.
31- Boparai H, Joseph M, O’Carroll DM, Kinetics and thermodynamics of cadmium ion removal by adsorption onto nano zerovalent iron particles. Journal of Hazardous Materials, (2011); 186: 458-65.
32- Sevim A, Hojiyev R, Gul A, Sabri CM, An investigation of the kinetics and thermodynamics of the adsorption of a cationic cobalt porphyrazine onto sepiolite. Dyes and Pigments, (2011); 88: 25-38
