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Adsorptive removal of arsenic(III), nickel(II) and lead(II) from aqueous solution using metal organic framework-graphene oxide nanocomposite

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dc.contributor.author Chowdhury, Tonoy
dc.date.accessioned 2017-09-12T20:12:06Z
dc.date.available 2017-09-12T20:12:06Z
dc.date.issued 2017-08
dc.identifier.uri http://hdl.handle.net/11122/7867
dc.description Thesis (M.S.) University of Alaska Fairbanks, 2017 en_US
dc.description.abstract Water, one of the most vital elements of the environment, is severely polluted with different industrial wastes like heavy metal ions, dyes, oil, nitrogen containing compounds, sulfur containing compounds, pharmaceutical and personal care products etc. All of these contaminated elements pose a threat to not only human beings by causing different diseases, but also to the environment and other living organisms in water. In order to remove these contaminated waste products from water, researchers have found that adsorptive removal is better than other removal processes because of its relatively low cost, higher removal capacity with selectivity, easy and simple operation, low generation of harmful byproducts, and regeneration of adsorbents. This research work involves the removal of hazardous and toxic heavy metals from waste water by using a new Metal Organic Framework (MOF) based nanocomposite, MIL-53(Al)-Graphene Oxide (GO) composite, which provides a new approach to remove contaminant from wastewater. MIL-53(Al)-GO composites of different MIL-53(Al) to GO mass ratios were synthesized. The properties of MIL-53(Al)-GO composites were characterized using X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FT-IR), Brunauer-Emmett-Teller (BET) surface area measurement and Scanning Electron Microscope (SEM). Batch experiments were performed on MIL-53(Al)-GO composites for As(III), Ni(II), and Pb(II) ions adsorption from aqueous solution. Kinetic and thermodynamic studies were carried out to examine the adsorption mechanism. The effect of solution pH, initial metal ion concentration, adsorbent doses, ionic strength, and temperature on the heavy metal adsorption was also investigated. For all the heavy metal ions tested, MIL-53(Al)-GO composites showed higher adsorption than pure MIL-53(Al) and GO due to the increased surface area of the composite. 3% MIL-53(Al)-GO showed the maximum adsorption of As(III) with an adsorption capacity of 64.97 mg/g. 5% MIL-53(Al)-GO exhibited the maximum adsorption of Ni(II) and Pb(II) with an adsorption capacity of 40.81 and 232.02 mg/g, respectively. The increased heavy metal adsorption on MIL-53(Al)-GO composites were due to the improved surface area of the composite and the electrostatic interaction between the adsorbent and metal ions. The reactions reached equilibrium in 1 hour for As(III), 30 minutes for Ni(II) and 3 hours for Pb(II) adsorption. Adsorption was greatly influenced by solution pH, initial metal ion concentration, adsorbent doses, ionic strength, and temperature. The adsorption kinetics and isotherms followed Pseudo-second-order and Langmuir isotherm models, respectively. en_US
dc.language.iso en_US en_US
dc.subject Arsenic en_US
dc.subject Absorption and adsorption en_US
dc.subject Nickel en_US
dc.subject Lead en_US
dc.subject Heavy metals en_US
dc.subject Sewage en_US
dc.subject Purification en_US
dc.subject Nanocomposites (Materials) en_US
dc.subject Adsorption en_US
dc.title Adsorptive removal of arsenic(III), nickel(II) and lead(II) from aqueous solution using metal organic framework-graphene oxide nanocomposite en_US
dc.type Thesis en_US
dc.type.degree ms en_US
dc.identifier.department Department of Mechanical Engineering en_US
dc.contributor.chair Zhang, Lei
dc.contributor.committee Aggarwal, Srijan
dc.contributor.committee Huang, Daisy
dc.contributor.committee Zhang, Junqing


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