Abstract
TiO2(M)/CS(G) adsorbent was synthesized by modified TiO2 and chitosan (CS); M is γ-methacryloxypropyl, G is glycidyl methacrylate. The influence factors for the maximum absorption wavelength (λmax) and standard curve of Cd(II) have time on blank reagent, color development time, acidity, rhodamine B, ascorbic acid and polyvinyl alcohol (PVA), which were studied by UV–Vis spectrophotometry. The results showed that the of λmax of Cd(II) is 600 nm, the linear regression equation is y = 0.0242x + 0.1771, correlation coefficient (R2) is 0.9995. The adsorption performance of the adsorbent is affected by the adsorption time, adsorption temperature, adsorbent dosage and pH. The kinetics of the adsorbent for Cd(II) were studied. The adsorption process includes three stages: surface diffusion, particle internal diffusion and adsorption equilibrium diffusion. Finally, the maximum adsorption capacity (qmax) of TiO2(M)/CS(G) adsorbent for Cd(II) is 558.66 mg/g.
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ACKNOWLEDGMENTS
This work were supported by the National Natural Science Foundation of China (NSFC, no. 21905146), the Natural Science Foundation of Heilongjiang Province of China (no. YQ2019B009), University Nursing Program for Young Scholars with Creative Talents of Heilongjiang Province of China (no. UNPYSCT-2020066), and the Natural Science Fundamental Research Project of Department of Education of Heilongjiang Province of China (no. 135309336).
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Chen, G., Song, K., Chen, X. et al. Adsorption Experiments and Kinetics of an Efficient Absorbent for Cd(II). Russ. J. Phys. Chem. 96, 1546–1554 (2022). https://doi.org/10.1134/S0036024422070147
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DOI: https://doi.org/10.1134/S0036024422070147