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Dyes Adsorption and Removal of Aqueous Solutions with Novel Adsorbents Based on Graphene Oxide

Mohammadi, Esmaeel | 2019

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 51772 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum
  6. Advisor(s): Borghei, Mahdi; Ghasemi, Shahnaz
  7. Abstract:
  8. Nowadays, water pollution and water sources decreasion, is one of the important issues of our world. Treatment of polluted water and wastewater and recycling of those to industries and common uses, is very necessary. Dyes, is one of the biggest parts of water pollutants, especially, in textile plants. There are some ways for dye removal, in the industries; including biological, chemical and physical methods. Among of these methods, physical removal of dyes through adsorption (with Activated Carbon or other adsorbents), is very popular. Hydrogels are three-dimensional hydrophilic polymer networks, introducing very good swelling rate, mechanical properties and pollutants adsorption. In this project, we synthesized a novel hydrogel containing Acrylamide-Carboxy Methylcellulose-Graphene Oxide that had significant mechanical properties and adsorption capacity. Graphene Oxide was characterized via XRD, FT-IR, FE-SEM. Hydrogels was characterized via FT-IR, FE-SEM and compressive strength test. Two anionic dyes (Acid Blue 92, Reactive Blue 21) was used for adsorption experiments. Adsorption kinetics and isotherms were investigated and results indicated that both of dyes follows pseudo-first order kinetic and Langmuir isotherm. Equilibrium adsorption capacity for AB92 and RB21 was 82.6 and 59.74 mg/g respectively with G0.15PC hydrogel. Maximum of adsorption capacity through Langmuir model for AB92 and RB21 was 217.4 and 153.85 mg/g, respectively
  9. Keywords:
  10. Dye Removal ; Graphene-based Absorbers ; Hydrogel ; Acryle Amide ; Graphene Oxide ; Colored Textile Wastewater ; Carboxymethyl Cellulose

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