Triclosan adsorption from model system by mineral sorbent diatomite

Altynay A. Sharipova, Saule B. Aidarova, Neila Ye Bekturganova, Aiym Tleuova, Moldir Kerimkulova, Orynkul Yessimova, Talmira Kairaliyeva, Olena Lygina, Svitlana Lyubchik, Reinhard Miller

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Abstract

Adsorption of model systems of triclosan by mineral sorbent diatomite is studied. The triclosan equilibrium concentration was measured spectrophotometrically, the morphology of the diatomite characterized using scanning electron microscopy and the amount of the adsorbed triclosan on the diatomite quantified by a mass balance. Adsorption isotherms were analyzed according to the linear/nonlinear form of Langmuir, Freundlich, Sips and Toth isotherm models isotherms, using AMPL software. It is shown that nonlinear Langmuir and Sips isotherm model provided suitable fitting results and no pronounced difference in adsorption efficiency between isotherms measured after 1, 2 and 3 days adsorption was observed. Determined maximum adsorption capacity of diatomite towards triclosan qs is 140 mg/g. Averaged calculated values of ΔG are −9.9 and −9.6 kJ/mol for Langmuir and Sips models respectively. The negative sign of such values indicates spontaneous, physical in nature adsorption.

Original languageEnglish
Pages (from-to)97-101
Number of pages5
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume532
DOIs
Publication statusPublished - 5 Nov 2017

Keywords

  • Adsorption
  • Adsorption isotherms
  • Diatomite
  • Sorbents
  • Triclosan

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    Sharipova, A. A., Aidarova, S. B., Bekturganova, N. Y., Tleuova, A., Kerimkulova, M., Yessimova, O., Kairaliyeva, T., Lygina, O., Lyubchik, S., & Miller, R. (2017). Triclosan adsorption from model system by mineral sorbent diatomite. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 532, 97-101. https://doi.org/10.1016/j.colsurfa.2017.06.012