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- Title
Cr(Ⅵ)吸附-还原机制建模与蚕沙吸附性能研究.
- Authors
陈曦垚; 曹艳晓; 彭存昕; 张敬东; 李鸿鹄; 李飞; 王志标
- Abstract
Multiple-reaction-kinetic is used to discuss the issue of Cr(Ⅵ)-TCr combined kinetic modeling for raw Cr(Ⅵ) biosorbent. Taking silkworm excrement as an example, the removal ability of Cr(Ⅵ) and TCr is evaluated quantitatively by fitting estimation parameters and the co-parametric-equations about Cr(Ⅵ) and TCr are established by using the multiple-reaction-kinetic. Through batch experiments, the variations of pH, Cr(Ⅵ), TCr with time in solution at different initial pH are investigated, and then the optimal working pH for removing both Cr(Ⅵ) and TCr is determined. The results showed that the optimal working pH is 2.0, and the equilibrium adsorption quantity of TCr is 2.37 mg/g. The fitting deviation of the co-parametric-equations was less than the sum of first-order kinetic equations for both Cr(Ⅵ) and TCr. Moreover, the fitting parameters obtained from different initial pH, suggested that the desorption of Cr(Ⅲ) results in its residues, and the residues decreased with the increase of pH. There is a linear relationship between the logarithm of Cr(Ⅵ) removal rate constant and the change of hydrogen ion in solution.
- Publication
Environmental Science & Technology (10036504), 2019, Vol 42, Issue 11, p105
- ISSN
1003-6504
- Publication type
Article
- DOI
10.19672/j.cnki.1003-6504.2019.11.016