Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection

Permanent URI for this collectionhttps://hdl.handle.net/11147/7148

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Author: search.filters.author.Eroğlu, Ahmet EminSubject: search.filters.subject.Alumina

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  • Article
    Citation - WoS: 35
    Citation - Scopus: 40
    Preparation and Characterization of Alumina-Supported Iron Nanoparticles and Its Application for the Removal of Aqueous Cu2+ Ions
    (Elsevier Ltd., 2011) Karabelli, Duygu; Ünal, Semira; Shahwan, Talal; Eroğlu, Ahmet Emin
    A composite sorbent of iron nanoparticles and alumina (Al–nZVI) was prepared and applied in the removal of Cu2+ ions from aqueous solutions. Alumina was introduced in a solution of Fe2+ ions, which were then reduced to metallic iron nanoparticles using borohydride ions. The characterization results showed that iron nanoparticles were partially dispersed on alumina surface, with their diameter being in the range 10–80 nm. The uptake experiments were performed at initial Cu2+ concentrations ranging from 10.0 to 500.0 mg/L. The experiments investigated the effects of initial concentration, contact time, and repetitive usage of the Al–nZVI on the extent of removal of Cu2+ ions. The composite sorbent demonstrated fast uptake, and its fixation capacity was 1.50 mmol/g (95.3 mg/g), which is well above that of pure alumina (0.32 mmol/g; 20.3 mg/g).
  • Article
    Citation - WoS: 60
    Citation - Scopus: 67
    Removal of Aqueous Rare Earth Elements (rees) Using Nano-Iron Based Materials
    (Korean Society of Industrial Engineering Chemistry, 2013) Ünal Yeşiller, Semira; Eroğlu, Ahmet Emin; Shahwan, Talal
    The uptake of REEs was investigated using nano-zero valent iron (nZVI) and alumina-supported nZVI (Al-nZVI). The results indicated fast uptake, with saturation approached within 10 min of contact between solutions and solids. Upon using nZVI, the uptake of REEs seemed to be quantitative over the studied range of concentration; 1.0–100.0 mg L−1. When Al-nZVI was used, complete removal was achieved within the range of 1.0–10.0 mg L−1. The solids demonstrated stable performance beyond pH of 2.0, up to neutral pH conditions. Fractionation of REEs on Al-nZVI was observed. The REE ions seem to be fixed to oxide and oxyhydroxide surface groups.