NDLI: An optimized pathway for phosphate ions removal from aqueous solution based on experimental design methodology

Content Provider	Springer Nature Link
Author	Yao, B. Zran, E. Yobouet, A. Drogui, P. Trokourey, A.
Copyright Year	2014
Abstract	Wastewaters can contain residual phosphorus concentrations above the recommended limiting values, and it could have a high environmental impact. The discharge of such effluents is undesirable and can cause excessive nutrients and eutrophication in the receiving water. In order to produce an effluent suitable for stream discharge, chemical precipitation of phosphate based on a sequential experimental design has been explored. The influence of factors [pH, type of salt (calcium or iron)] involved in the co-precipitation of phosphate ions was studied by a complete factorial design. It was established that the optimal parameter values obtained from a second-order model allowed conclusion to be drawn on the effectiveness of the removal. So in the best conditions (pH 8.41 and a dose of 97.07 mg/L Ca(OH)$_{2}$ with 10 mg/L FeSO$_{4}$·7H$_{2}$O), 95.80 % (removal rate) of the phosphate ion were removed from the synthetic solution. A second-order mathematical model of the removal of phosphate ions, depending on two parameters which are pH and Ca(OH)$_{2}$ concentration, was finally proposed. Moreover, on the basis on the pH solution, it was shown that the precipitate formed was hydroxyapatite Ca$_{10}$(PO$_{4}$)$_{6}$(OH)$_{2}$ and the scanning electron microscopy views revealed the amorphous and homogeneous aspect of the precipitates.
Starting Page	3117
Ending Page	3124
Page Count	8
File Format	PDF
ISSN	17351472
Journal	International Journal of Environmental Science & Technology
Volume Number	12
Issue Number	10
e-ISSN	17352630
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-12-23
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Phosphate ions Ecotoxicology Removal rate Response surface methodology Water Management Eutrophication Factorial design co-precipitation Waste Water Technology Aquatic Pollution Environment Water Pollution Control Environmental Chemistry Environmental Science and Engineering Soil Science & Conservation
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Environmental Engineering Agricultural and Biological Sciences

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