DOI: 10.1016/j.watres.2019.01.046
Scopus记录号: 2-s2.0-85061646344
论文题名: Dynamic modeling of manganese removal in a pyrolusite fluidized bed contactor
作者: Dashtban Kenari S.L. ; Shabanian J. ; Barbeau B.
刊名: Water Research
ISSN: 431354
出版年: 2019
卷: 154 起始页码: 125
结束页码: 135
语种: 英语
英文关键词: Breakthrough
; Drinking water
; Manganese removal
; Modeling
; Pyrolusite fluidized bed contactor
英文摘要: A novel pyrolusite fluidized bed (PFB) contactor, which we recently developed for dissolved manganese (Mn(II)) removal through surface adsorption and subsequent oxidation by free chlorine, was modeled in this study. The hydrodynamic behavior of the filter media and water in the fluidized bed was described by the axial dispersion model. The model incorporated the effects of axial mixing in the liquid and solid phases, mass transfer resistance in a laminar fluid boundary layer surrounding a media grain, and a second order oxidation rate expression. The experimental data from lab-scale and field pilot-scale contactors was adopted for the model development and its validation. For the former, the data was employed to estimate the oxidation rate constant, the mass transfer coefficient, and the axial solid phase dispersion coefficient for the model. The model simulations matched the experimental data with less than 20% error across a wide range of Mn(II) and free chlorine concentrations and hydraulic loading rates that might be encountered in a drinking water treatment plant. The sensitivity analysis showed that the time to breakthrough is most sensitive to the adsorption isotherm constants and the oxidation rate constant. These observations indicate that the alluded parameters mainly control the performance of the PFB contactor as well as the process stability. Finally, a sample application of the model to acquire operational inputs was illustrated by analyzing the effect of free chlorine concentration on Mn(II) removal performance and breakthrough time within a PFB contactor. © 2019 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/121951
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Civil, Geological, and Mining Engineering, NSERC-Industrial Chair on Drinking Water, Environment, Polytechnique Montreal, C.P. 6079, Succursale Centre-Ville, Montreal, Quebec H3C 3A7, Canada; Natural Resources Canada, CanmetENERGY, 1 Haanel Drive, Ottawa, Ontario K1A 1M1, Canada
Recommended Citation:
Dashtban Kenari S.L.,Shabanian J.,Barbeau B.. Dynamic modeling of manganese removal in a pyrolusite fluidized bed contactor[J]. Water Research,2019-01-01,154