A method for determining the treatment dosage of drinking water treatment residuals for effective phosphorus immobilization in sediments

Wang, Changhui, Liang, Jincheng, Pei, Yuansheng and Wendling, Laura A. (2013) A method for determining the treatment dosage of drinking water treatment residuals for effective phosphorus immobilization in sediments. Ecological Engineering, 60 421-427. doi:10.1016/j.ecoleng.2013.09.045


Author Wang, Changhui
Liang, Jincheng
Pei, Yuansheng
Wendling, Laura A.
Title A method for determining the treatment dosage of drinking water treatment residuals for effective phosphorus immobilization in sediments
Journal name Ecological Engineering   Check publisher's open access policy
ISSN 0925-8574
1872-6992
Publication date 2013-11-01
Sub-type Article (original research)
DOI 10.1016/j.ecoleng.2013.09.045
Open Access Status
Volume 60
Start page 421
End page 427
Total pages 7
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Formatted abstract
Highlights
• The dosage of WTRs required to immobilize mobile P in sediments was investigated.
• The P immobilization capacity of WTRs can be expressed as an equation.
• Most of mobile P in sediments can be immobilized by WTRs at determined dosages.

Drinking water treatment residuals (WTRs), non-hazardous by-products generated during treatment of drinking water, can be reused to immobilize phosphorus (P) in sediments for eutrophication control. Prior to application, it is necessary to determine the treatment dosage of WTR to immobilize P in sediments. In the present study, the dosage of Al/Fe based WTRs required to effectively immobilize P in lake sediments was determined in a laboratory setting as a function of the oxalate-extractable Al (Alox) and Fe (Feox) content of the WTRs by completely mixing Al/Fe based WTRs with Lake Baiyangdian sediments. The results showed that the capacity for immobilization of mobile P (Pm) in sediments by Alox and Feox in Al/Fe based WTRs ((Alox + Feox)WTR) can be described by the equation: (Alox + Feox)WTR = 83*Pm–40 (where Alox, Feox and Pm are expressed in μmol g−1). This equation was successfully used to determine the respective quantities of three different Al/Fe based WTRs required to immobilize P in sediments from Lake Chaohu, Lake Taihu, the Changjiang River, the Haihe River, the Pear River and the Yellow River. Using the equation derived herein, the required Al/Fe based WTR application dose can easily be determined where the Pm content of the sediment and the Alox and Feox content of the WTR are known.
Keyword Drinking water treatment residue
Sediment
Phosphorus
Remediation
Eutrophication
Reuse
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
School of Agriculture and Food Sciences
 
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Created: Sat, 01 Feb 2014, 01:30:32 EST by Laura Wendling on behalf of School of Agriculture and Food Sciences