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- Title
Numerical simulation and parameter analysis of Acid Red B migration in river sand.
- Authors
Yiyun An; Aifang Gao; Zefeng Song; Xiaofeng Fang; Shaorong Li; Boyi Gao; Yingying Lian; Mingyuan Yu; Aiguo Li; Bingfei Yang
- Abstract
In this study, the adsorption and migration characteristics of Acid Red B (AR B) in river sand were investigated using batch and column experiments. The Freundlich equation was used to fit the experimental data of isothermal adsorption. The penetration curves of tracer Cl- and AR B were simulated by HYDRUS-1D. The results show that with the increase of the initial pH value, the adsorption coefficient KF in the Freundlich equation decreases gradually, and the adsorption ability of river sand to AR B is weakened. With the increase of initial pH in sand column outflow experimental, the peak value C/C0 of AR B penetration curve is closer to 1, which indicates that the adsorption is weakened and easy to migrate at higher pH value. The simulation results of non-equilibrium onesite model fitting in HYDRUS-1D show the deterministic coefficient R² > 0.872 and the root mean square error RMSE < 0.064. The parameters of the model simulation are consistent with the results of the column experimental the breakthrough curves. This model can better describe the migration process of AR B in river sand. It is not conducive to adsorption at higher pH (the smaller KD), and AR B is easier to migrate with water flow in river sand.
- Subjects
ACID analysis; STANDARD deviations; SAND; COMPUTER simulation
- Publication
Desalination & Water Treatment, 2022, Vol 264, p244
- ISSN
1944-3994
- Publication type
Article
- DOI
10.5004/dwt.2022.28572