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Synthesis of Magnetic Adsorbent Nanocomposites based on Modified Sugarcane Bagasse and Iron Nanoparticle for dye Removal from Aqueous Solutions

Alizadeh Monfared, Davood | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 48104 (03)
  4. University: Sharif University of Technology
  5. Department: Chemistry
  6. Advisor(s): Pourjavadi, Ali; Alamolhoda, Ali Asghar
  7. Abstract:
  8. Lately, a wide application of eco-friendly polysaccharide-based hydrogels in waste water treatment has received enormous attention in the literature. The effluents containing dye materials from the processing industries are washed off into rivers and lakes which can be very harmful to creatures. Low-cost biopolymers and biodegradable adsorbents have been researched to be a good tool to minimize the environmental hazards caused by the industrial effluents by removal of these toxic and carcinogenic dyes from the waste effluents. In this study, an eco-friendly superabsorbent hydrogel was prepared by using of sugarcane bagasse, two hydrophilic monomers, magnetic nanoparticle and methylene bisacrylamide as the crosslinking agent. The superabsorbent hydrogel as an adsorbent was then successfully used for the removal of three organic dyes from aqueous medium. The adsorbent was evaluated using batch adsorption process by performing a series of batch investigations to identify the maximum sorption capacities, sorption kinetics, hermodynamics and isotherms of these dyes onto the adsorbent by assessing different operational conditions such as amount of crosslinker, adsorbent dosage, initial dye concentration and temperature. The sorption process was studied using the pseudo-first order, the pseudo-second order kinetic equations alongside the Freundlich and Langmuir isotherm equations. The negative and positive values of ΔG° and ΔH° demonstrated that the sorption process of dyes onto the adsorbent was spontaneous and endothermic, respectively. FT-IR UV-Vis spectroscopy, FE-SEM, TEM and TGA characterization was used to demonstrate morphology, chemical and physical properties of all materials
  9. Keywords:
  10. Sugarcane Bagasse ; Magnetic Nanodot ; Dye Removal ; Magnetic Nanocomposite ; Superabsorbent Hydrogels ; Aqueous Solutions

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