Fate and Transport of Combined Residual Chlorine in Small Stream

Autor:	David W. Ostendorf, David A. Reckhow, Michael E. Billa
Rok vydání:	1990
Předmět:	Hydrology Environmental Engineering Turbulent diffusion Volatilisation Chemistry Outfall chemistry.chemical_element Mechanics STREAMS Wastewater Chlorine Environmental Chemistry Water pollution Transport phenomena General Environmental Science Civil and Structural Engineering
Zdroj:	Journal of Environmental Engineering. 116:1125-1142
ISSN:	1943-7870 0733-9372
DOI:	10.1061/(asce)0733-9372(1990)116:6(1125)
Popis:	Concentration profiles of combined residual chlorine (CRC) are measured in a small stream just below a municipal wastewater outfall. Loss of CRC is found to be due primarily to volatilization. Vertical and longitudinal concentration profiles are successfully modeled with a 2‐dimensional diffusive transport model, not incorporating a stagnant film. To calibrate this model, a Henry's Law constant for CRC is determined in the laboratory. The model proves superior in the case studied to the classical two‐film model for the prediction of depth‐integrated combined residual chlorine. The diffusive transport model is nearly identical to the two‐film model under conditions of imposed gas‐phase limitation. However, the two‐film theory predicts liquid‐phase limitation for the data in this study, and as a result, significant differences exist between the two sets of model predictions. Field data clearly indicates gas‐phase limitation, which was predicted by the 2‐dimensional diffusive transport model.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::97b4c44acf8f3073a1df299f025870ca https://doi.org/10.1061/(asce)0733-9372(1990)116:6(1125) Zobrazit plný text záznamu