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    Öğe
    Investigation of Competitive and Noncompetitive Adsorption of Some Heavy Metals Ions on Leucodon sciuroides (Hedw.) Schwagr
    (Amer Chemical Soc, 2020) Ucarli, Okan; Yayintas, Ozlem Tonguc; Engin, Mehmet Soner; Cay, Seydahmet; Saglikoglu, Gulsen; Yilmaz, Selehattin
    Heavy metals are an important pollutant group. Adsorption is one of the methods used to remove heavy metals from the environment. Mosses were preferred as bio-indicators because they have the capacity to accumulate many elements by their high surface-to-volume ratio. Leucodon sciuroides (Hedw.) Schwagr. (LS) are mosses that play an important part of the ecosystem and are collected from the Ida Mountain (Kazdag) region of canakkale (Turkey). For the purpose of determining the adsorption capacity of heavy metal ion (Pb2+, Cd2+, Co2+, Ni2+, Zn2+, and Cu2+) analysis conditions, pH, contact time, and adsorbent amounts were determined and the maximum adsorption capacity was calculated with the help of the relevant isotherms. Heavy metal concentrations were determined by inductively coupled plasma-mass spectrometry. It was determined that the optimum adsorption for mosses was 30 min at pH = 6.0 (the pH at which maximum adsorption occurs). The adsorption event shows that some divalent cations fit the Freundlich isotherm and some fit the Langmuir isotherm model. A pseudo-second-order reaction best fits the kinetic data for metal ions. Among the six metal ions studied, the highest adsorption was observed in Pb2+ and Cu2+ cations. According to the competitive adsorption results, the moss has a great advantage in determining the Pb(2+ )and Cu2+ cations industrially as well as other metals and in removing other metal impurities from the environment. Also, LS is exploited as a biosorbent to remove metal ions from aqueous solutions and can be used as a biomarker.
  • [ X ]
    Öğe
    Voltammetric detection of biosorption of Co, Ni, Zn, Cd, Pb, and Cu on Hypnum cupressiforme Hedw. in aquatic media
    (Springer Wien, 2022) Yayintas, Ozlem Tonguc; Cay, Seydahmet; Engin, Mehmet Soner; Ucarli, Okan; Saglikoglu, Gulsen; Yilmaz, Selehattin
    In this study, the concentration of six heavy metal ions biosorbed at Hypnum cupressiforme Hedw. (HC), moss determined by voltammetric methods. While determining the optimum biosorption conditions, it was found that the amount of biosorbent 0.1 g, the contact time of metal ions-mosses is 30 min. The biosorption event shows that Ni2+ and Cu2+ appropriate the Langmuir isotherm and sequence of biosorption % was explained for covalent radii of these metals. Pb2+, Cd2+, Co2+, Zn2+, appropriate the Freundlich isotherm model and sequence of biosorption % was explained for the ratio of the hydration number to the hydrated radii of these metals. Biosorption results indicated that HC can be used for removing metal ions from aqueous solutions.