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- W2006309739 abstract "Real reactive brilliant red K-2BP (C. I. Reactive Red 24) dye wastewater is characterized by its very high chemical oxygen demand (COD), high concentration of sodium salt, and low biodegradability. A combined process of precipitation, complex extraction, and stripping was proposed as a method for treating such wastewater. Fluosilicic acid was selected as a precipitator for the recovery of sodium ions, trialkylamine (N235) as the extractant, and sodium hydroxide (NaOH) as a back-extractant. Our results indicated that desalination had the greatest influence on extraction rates while the phase ratio and the N235 concentration also influenced the reaction. Acid, which was an important factor affecting COD extraction, was produced during desalination process. We also noted a number of points of interest: that the extraction reaction could reach equilibrium in 20 min; that the COD removal rates tended to increase under certain conditions, with an increase in acidity of wastewater resulting in increased desalination rates, and an increased N235 concentration and phase ratio (O/A). Under optimum conditions the COD removal rates can reach 92%, the extractant could be regenerated by stripping with NaOH, and the stripping rate could reach an efficiency of 100%." @default.
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- W2006309739 date "2015-02-11" @default.
- W2006309739 modified "2023-10-16" @default.
- W2006309739 title "Removal of sodium salts and chemical oxygen demand from real reactive dye wastewater by the integrated process of chemical precipitation and extraction" @default.
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- W2006309739 doi "https://doi.org/10.1080/19443994.2015.1010232" @default.
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