AI Article Synopsis
- * The CB-ECH beads demonstrated increased thermal stability and better pore structures compared to regular chitosan beads, leading to improved nitrate adsorption capabilities.
- * Nitrate adsorption was analyzed using various models, and results indicated that the Sips isotherm and homogeneous surface diffusion model accurately explained the adsorption processes, revealing the heterogeneous nature of nitrate behavior on the CB-ECH beads.
Article Abstract
In this study, we prepared chitosan beads cross-linked with epichlorohydrin (CB-ECH) to improve the removal of nitrate in groundwater. It was confirmed that CB-ECH exhibited higher thermal stability and well-developed nano-pores compared to the pure chitosan beads (CB) by the thermogravimetric analyzer, nitrogen gas adsorption and desorption isotherm, and field emission scanning microscopy analysis. The CB-ECH showed a higher nitrate adsorption amount than the pure CB. Nitrate adsorption behaviors of CB-ECH were further investigated using adsorption isotherm, adsorption kinetics, adsorption energy distribution, and Gibbs free energy distribution models. The adsorption equilibrium and kinetics of nitrate ion on CB-ECH were well explained by the Sips isotherm and homogeneous surface diffusion model, respectively. It was also found from the AED analysis that the CB-ECH represent the heterogeneous adsorption behaviors for nitrate.
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| http://dx.doi.org/10.1166/jnn.2021.19271 | DOI Listing |
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