Researcher:
Demirer, Miray

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Undergraduate Student

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Miray

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Demirer

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Demirer, Miray

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2006 - 200912010 - 20111

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Researcher Of Publications: search.filters.isAuthorOfPublication.a4ef326a-c355-4858-a53f-4966085d6b04

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    Impact of dilution on the transport of poly(acrylic acid) supported magnetite nanoparticles in porous media
    (Elsevier, 2011) Ersenkal, Dila Aksoy; Ziylan, Asu; Ince, Nilsun H.; Copty, Nadim K.; Department of Chemistry; Department of Chemistry; Acar, Havva Funda Yağcı; Demirer, Miray; Faculty Member; Undergraduate Student; Department of Chemistry; College of Sciences; College of Sciences; 178902; N/A
    This paper investigates the impact of dilution on the mobility of magnetite nanoparticles surface coated with poly(acrylic acid) (PM). Transport experiments were conducted in a water-saturated sand-packed column for input nanoparticle solutions with total Fe concentrations ranging from 100 to 600 mg/L Particle size analysis of the synthesized nanoparticle solutions showed that PM provides good size stability for Fe concentrations as low as about 1 mg/L Time-moment analysis of the nanoparticle breakthrough curves, on the other hand, revealed that nanoparticle mass recovery from the column decreased consistently with dilution, with greater attenuation, sharper fronts and longer tails compared to that of the tracer. Particle size analysis of the eluted solutions shows that the nanoparticle size is negatively correlated with nanoparticle concentration. Modeling results suggest that the decrease in nanoparticle mobility with input concentration can be represented using a kinetic time-dependent deposition term with finite deposition capacity and a kinetic detachment term. For field applications, the increase in particle size and detachment resulting from dilution means reduced transport efficiency of nanoparticles and reaction potential with travel distance.
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    A statistical approach to control particle size of poly(acrylic acid) stabilized iron oxide nanoparticles
    (Routledge, 2006) N/A; N/A; Department of Chemistry; Department of Chemistry; Acar, Havva Funda Yağcı; Demirer, Miray; Faculty Member; Undergraduate Student; Department of Chemistry; College of Sciences; College of Sciences; 178902; N/A
    Poly(acrylic acid) coated superparamagnetic iron oxide nanoparticles were prepared in aqueous solutions of iron salts with in situ coating of poly(acrylic acid). Influence of reaction variables, namely, iron concentration, reactive(COOH)/iron mole ratio, base (NH4OH) amount and polymer molecular weight, primarily on hydrodynamic size and stability of the particles was investigated. Also, size and stability of washed particles (no excess coating material) and magnetization as a function of these variables were studied. In order to design best set of experiments and correlate the results to variables, statistics programs Design Expert 7.0 and Minitab14 were used. Results will be discussed in this paper.