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    Solid Phase Extraction Based on the Use of Thermophilic Bacteria Bacillus aerius VO-8 Immobilized XAD-16 for The Preconcentrations of Co and Ni
    (Int'l Journal of Research in Chemical, Metallurgical and Civil Engg., 2016-07-18) Okumus, V., Kilinc, E.
    Bacillus aerius VO-8 (Accession:KJ842091.1), a thermophilic bacteria, was immobilised on Amberlite XAD-16 and used as solid phase biosorbent for preconcentrations of Co(II) and Ni(II) before their determination by inductively coupled plasma optical emission spectrometry (ICP-OES). Effect of various parameters such as pH, flow rate of the sample solution, amount of the biosorbent, type of eluent and reusability of column were investigated. For Co and Ni the optimum pH values, flow rate and type of eluent were found pH 6.0 and 5.0, 2 ml/ min, 1.0 mol/L HCl, respectively. Maximum biosorption capacity was observed 13,8 mg/g for Co and 10.5 mg/g for Ni. The accuracy of the proposed method was verified through the analysis of certified reference samples of tea (NCS ZC-73014) and applicability of the method was validated through the concentrations of Co and Ni were determined in some edible vegetables.