Article history: Zr(IV) surface-immobilized cross-linked chitosan/bentonite composite was synthesized by immersing Received 30 October 2015 cross-linked chitosan/bentonite composite in zirconium oxychloride solution, and characterized by X- Received in revised form 15 January 2016 ray diffraction, Fourier transform infrared spectroscopy, Scanning electron microscopy techniques. The Accepted 25 January 2016 adsorption of an anionic dye, Amido Black 10B, from aqueous solution by Zr(IV) loaded cross-linked chi- Available online 11 February 2016 tosan/bentonite composite was investigated as a function of loading amount of Zr(IV), adsorbent dosage, pH value of initial dye solution, and ionic strength. The removal of Amido Black 10B increased with an Keywords: increase in loading amount of Zr(IV) and adsorbent dosage, but decreased with an increase in pH or ionic Zr(IV) surface-immobilized cross-linked strength. The adsorption of AB10B onto Zr(IV) loaded cross-linked chitosan/bentonite composite was chitosan/bentonite composite favored at lower pH values and higher temperatures. The Langmuir isotherm model ﬁtted well with the Amido Black 10B equilibrium adsorption isotherm data and the maximum monolayer adsorption capacity was 418.4 mg/g Adsorption at natural pH value and 298 K. The pseudo-second-order kinetic model well described the adsorption process of Amido Black 10B onto Zr(IV) loaded cross-linked chitosan/bentonite composite. The possi- ble
Applied Surface Science – Elsevier
Published: Apr 30, 2016
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