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Use of drinking water treatment residuals to control the internal phosphorus loading from lake sediments: Laboratory scale investigation
Author(s)
Date Issued
June 2013
Date Available
08T09:08:17Z November 2013
Abstract
This work investigated a novel approach of reusing drinking water treatment residuals (WTRs) to reduce the internal P loading from lake sediments under varied levels of dissolve oxygen (DO) in laboratory scale. The results showed that although the internal P loading increased as the DO level decreasing, WTRs can significantly reduce the internal P loading under different DO levels; in particular, under high DO level (5–8 mg L−1), the internal P loading can be reduced by 100%. The results of P fractionation suggested that the retained-P by WTRs existed as the NaOH extractable P. The P nuclear magnetic resonance spectroscopy (31P NMR) analysis further demonstrated that the retained-P was the orthophosphate, orthophosphate monoesters, orthophosphate diesters and pyrophosphate. Moreover, application of WTRs had marginal effects on Fe and Al concentrations and pH of the overlaying water. Therefore, WTRs can be an ideal material for controlling the internal P loading for lake restoration in large scale.
Type of Material
Journal Article
Publisher
Elsevier
Journal
Chemical Engineering Journal
Volume
225
Start Page
93
End Page
99
Copyright (Published Version)
2013 Elsevier
Language
English
Status of Item
Peer reviewed
This item is made available under a Creative Commons License
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