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Related Concept Videos

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Related Experiment Video

Updated: Dec 16, 2025

Optimized Procedure for Determining the Adsorption of Phosphonates onto Granular Ferric Hydroxide using a Miniaturized Phosphorus Determination Method
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Organic phosphorus removal using an integrated advanced oxidation-ultrafiltration process.

Holly E Gray1, Tony Powell2, Suyoung Choi3

  • 1Department of Civil and Environmental Engineering, University of Waterloo, 200 University Ave. W., Waterloo, N2L 3G1, ON, Canada.

Water Research
|July 5, 2020
PubMed
Summary

This study demonstrates an advanced oxidation process (AOP) using TiO2/UV photolysis and ultrafiltration to remove non-reactive phosphorus (nRP) from wastewater. The AOP effectively removes recalcitrant phosphorus species, achieving high removal efficiencies in municipal and industrial effluents.

Keywords:
AdsorptionAdvanced oxidation processNon-reactive phosphorusOrganic phosphorusPhosphorus removalUV/TiO(2)Ultrafiltration

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Area of Science:

  • Environmental Chemistry
  • Water Treatment Technologies

Background:

  • Non-reactive phosphorus (nRP) species, including condensed phosphates and organic phosphorus (OP), persist through conventional wastewater treatment.
  • Meeting stringent ultra-low effluent phosphorus discharge limits necessitates the removal of these recalcitrant nRP forms.

Purpose of the Study:

  • To evaluate an advanced oxidation process (AOP) combining TiO2/UV photolysis with ultrafiltration for oxidizing and removing nRP.
  • To investigate the mechanisms of phosphorus removal, including adsorption and oxidation, using model OP compounds.

Main Methods:

  • Utilized a TiO2/UV photolysis coupled with ultrafiltration system.
  • Employed model organic phosphorus compounds (ATP and AEP) to study AOP mechanisms.
  • Applied the AOP to municipal wastewater effluents and an industrial effluent.

Main Results:

  • Observed preferential binding of ATP to TiO2, followed by photooxidation and subsequent adsorption/oxidation of AEP.
  • Confirmed that orthophosphate released during treatment was retained on TiO2 solids.
  • Achieved total phosphorus removal efficiencies of 90-97% for municipal effluents and 44% for industrial effluent.

Conclusions:

  • The AOP effectively removes nRP through a combination of filtration, surface complexation, and UV oxidation.
  • This AOP is a viable technology for achieving ultra-low phosphorus discharge limits from various wastewater streams.