Abstract This study investigates Cr (VI) removal from aqueous solution by synthetic chitosan-allophane nanocomposite. The nanocomposite was synthesized in the solvothermal method. The adsorbent was characterized utilizing X-ray diffraction (XRD), Fourier transforms infrared (FT-IR), Scanning electron microscope (SEM) image and Brunauer-Emmet-Teller (BET) method. This work investigated of influence of solid/liquid ratio, pH, contact time, initial concertation on the adsorption process, adsorption kinetics, and isotherms. The maximum adsorption capacity of synthetic nanocomposite for Cr (VI) is 112.17 (mg/g) on optimum conditions. The kinetics study shows that the pseudo-second-order kinetic equation better describes adsorbents' adsorption behavior. The isotherms study suggests that the adsorption process of synthetic chitosan-allophane nanocomposite follow the Langmuir model. Moreover, the stability and reproducibility of synthetic nano composite were investigated.
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Pazoki et al. (2024) studied this question.
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