PHOSPHORUS SORPTION CAPACITY OF DRINKING WATER TREATMENT RESIDUALS POTENTIAL FOR USE TO PROTECT WATER QUALITY
Drinking water treatment residuals (WTR) have been used to remove dissolved P from runoff water from agricultural land treated with poultry litter but large differences among WTR P sorption ability have been observed. The objective of this work was to determine WTR components responsible for differences in the P sorption capacity of various Al-based WTR. Chemical components, related to P sorption, were measured in 18 alum-based and 3 polymer based (poly-aluminumchloride) WTR. Phosphorus sorption maxima (Pmax) were derived from the linearized Langmuir equation (P < 0.01). A rainfall simulation study was performed using a subset of 11 WTR. Plots were treated with poultry litter (16.7 Mg ha−1) and a band application of WTR (50 Mg ha−1) and runoff was collected and analyzed for dissolved P. Langmuir Pmax varied widely from 0.44 to 3.6 g kg−1. The Langmuir Pmax was strongly correlated (P < 0.01) with amorphous Al (Alox) but not with Ca or Feox. Runoff P was correlated strongly with WTR Pmax (P < 0.01) and with Alox (P < 0.05). Before a WTR is used as a P sorbent, the sorption capacity should be measured to predict how it will perform. The empirical relationship between amorphous Al and P sorption capacity may be used to estimate WTR Pmax. Results from this study should not be extrapolated to Fe-based or other non-Al based WTR.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
Document Type: Research Article
Publication date: 2001-01-01
More about this publication?
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.
WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Learn about the many other WEF member benefits and join today
- Ingenta Connect is not responsible for the content or availability of external websites