Modified Magnetic Core- Zeolitic Shell Structures Applicable for the Removal of Heavy Metals from Wastewaters

Document Type : Research Article


1 Faculty of Science, University of Maragheh, Maragheh, I.R. IRAN

2 Department of Engineering, University of Ardakan, Ardakan, I.R. IRAN


Magnetic core-zeolitic shell structures modified with 3-Glycidyloxypropyl-trimethoxysilane (GPTMS) organic agents prepared by the hydrothermal method. The samples were characterized by X-Ray Diffraction (XRD), Thermo Gravimetric Analysis (TGA), Scanning Electron Microscopy (SEM), and nitrogen adsorption-desorption isotherms (BET). The results of the XRD patterns confirmed the successful growth of aluminosilicate crystals on the surface of the magnetic cores. Furthermore, the SEM images indicated that structures were spherical and the particle size was below 100 nm. The sorption activity of the samples was evaluated by removal of lead and cadmium ions from the wastewaters and according to the results, the final sorbent was enabled to decrease the concentration of cadmium ions selectively. The sorption routes and the effect of the presence of organic agents on the sorption efficiency were mechanistically discussed. The effect of the acidity of the medium on the sorption capacity of the prepared structures was studied and the obtained results were discussed in terms of the chemical structure of the surface.


Main Subjects

[2] Fenglian F., Wang Q., Removal of Heavy Metal Ions from Wastewaters: A Review, Journal of Environmental Management, 92: 407-418 (2011).
[3] Ngah W.S.W., Hanafiah M.A.K.M., Removal of Heavy Metal Ions from Wastewater by Chemically Modified Plant Wastes as Adsorbents: A Review, Bioresource Technology, 99: 3935-3948 (2008).
[4] Luo X., Lei X., Cai N., Xie X., Xue Y., Yu F., Removal of Heavy Metal Ions from Water by Magnetic Cellulose-Based Beads with Embedded Chemically Modified Magnetite Nanoparticles and Activated Carbon, ACS Sustainable Chemistry and Engineering, 4: 3960-3969 (2016).
[5] Luo X., Yuan J., Liu Y., Liu C., Zhu X., Dai X., Ma Z., Wang F., Improved Solid-Phase Synthesis of Phosphorylated Cellulose Microsphere Adsorbents for Highly Effective Pb2+ Removal from Water: Batch and Fixed-Bed Column Performance and Adsorption Mechanism, ACS Sustainable Chemistry and Engineering, 5: 5108-5117 (2017).
[7] Gupta V.K., Jain R., Mittal A., Mathur M., Sikarwar S., Photochemical Degradation of the Hazardous Dye Safranin-T using TiO2 Catalyst, Journal of Colloid and Interface Science, 309: 464-469 (2007).
[8] Sanchooli-Moghaddam M., Rahdar S., Taghavi M., Cadmium Removal from Aqueous Solutions Using Saxaul Tree Ash, Iranian Journal of Chemistry and Chemical Engineering (IJCCE), 35(3): 45-52 (2016).
[9] Gupta V.K., Goyal R.N., Sharma R.A., Novel PVC Membrane Based Alizarin Sensor and its application; Determination of Vanadium, Zirconium and Molybdenum, International Journal of Electrochemical Science, 4: 156-172 (2009).
[10] Goyal R.N., Gupta V.K., Oyama M., Bachheti N., Voltammetric Determination of Adenosine and Guanosine Using Fullerene-C60-Modified Glassy Carbon Electrode, Talanta, 71: 1110-1117 (2007).
[11] Gupta V.K., Rastogi A., Biosorption of Hexavalent Chromium by Raw and Acid-Treated Green Alga Oedogonium Hatei from Aqueous Solutions, Journal of Hazardous Materials, 163: 396-402 (2009).
[12] عاطف، محمد مسعود؛ سلیمی، عبد اله؛ قیصریان فرد، جواد؛ ارزیابی حذف فلزات سنگین (Cd، Cr، Ni) توسط گیاه مانگرو منطقه عسلویه، نشریه شیمی و مهندسی شیمی، (77)13: 119 تا 123 (1395).
[13] Gupta V.K., Jain R., Varshney S., Removal of Reactofix Golden Yellow 3 RFN from Aqueous Solution Using Wheat Husk-An Agricultural Waste, Journal of Hazardous Materials, 142: 443-448 (2007).
[14] Gupta V.K., Rastogi A., Nayak A., Adsorption Studies on the Removal of Hexavalent Chromium from Aqueous Solution Using a Low Cost Fertilizer Industry Waste Material, Journal of Colloid and Interface Science, 342: 135-141 (2010).
[15] Gupta V.K., Singh A.K., Gupta B., Schiff bases as Cadmium(II) Selective Ionophores in Polymeric Membrane Electrodes, Analytica Chimica Acta, 583: 340-348 (2007).
[16] Fan L., Song J., Bai W., Wang S., Zeng M., Li X., Zhou Y., Li H., Lu H., Chelating Capture and Magnetic Removal of Non-Magnetic Heavy Metal Substances from Soil, Scientific Reports, 3: 428-437 (2016).
[17] Giri S., Trewyn B.G., Stellmaker M.P., Lin V.S.Y., Stimuli-Responsive Controlled Release Delivery System Based on Mesoporous Silica Nanorods Capped with Magnetic Nanoparticles, Angewandte Chemie, 44: 5038-5044 (2005).
[18] Ali I., New Generation Adsorbents for Water Treatment, Chemical Reviews, 112: 5073-5091 (2012).
[19] Zhao W.R., Gu J.L., Zhang L.X., Chen H.R., Shi, J.L., Fabrication of Uniform Magnetic Nanocomposite Spheres with a Magnetic Core/Mesoporous Silica Shell Structure, Journal of American Chemical Society, 127: 8916–8917 (2005).
[20] Ali I., Asim M., Khan T.A., Low Cost Adsorbents for the Removal of Organic Pollutants from Wastewater, Journal of Environmental Management, 113: 170-183 (2012).
[21] Mittal A., Krishnan L., Gupta V.K., Use of Waste Materials-Bottom Ash and De-Oiled Soya, as Potential Adsorbents for the Removal of Amaranth from Aqueous Solutions, Journal of Hazardous Materials, 117: 171-178 (2005).
[22] Jain A.K., Gupta V.K., Jain S., Removal of Chlorophenols Using Industrial Wastes, Environmental Science and Technology, 38: 1195-1200 (2004).
[23] Zhang Y., Lin X., Hu S., Zhang X., Luo X., Core–Shell Zeolite@Alg–Ca Particles for Removal of Strontium from Aqueous Solutions, RSC Advances, 6: 73959-73973 (2016).
[24] Alvarez-Ayuso E., Garcia-Sanchez A., Removal of Heavy Metals from Waste Waters by Natural and Na-Exchanged Bentonites, Clays & Clay Minerals, 51: 475-480 (2003).