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Related Experiment Videos

Innovative methods for removing phosphorus from wastewaters.

L Di Palma1, C Merli, E Petrucci

  • 1Dipartimento di Ingegneria Chimica, dei Materiali, delle Materie Prime e Metallurgia, Università di Roma La Sapienza, Via Eudossiana 18, 00184, Roma.

Annali Di Chimica
|May 31, 2001
PubMed
Summary

This study explored phosphorus oxidation in wastewater using Fenton's reagent. Both chemical and electrochemical methods effectively converted hypophosphites and phosphites to phosphate, with comparable costs.

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Area of Science:

  • Environmental Chemistry
  • Water Treatment Technologies

Background:

  • Wastewater often contains hypophosphites and phosphites, requiring effective phosphorus removal to prevent eutrophication.
  • Oxidation to phosphate is a key step in phosphorus management.

Purpose of the Study:

  • To assess the feasibility of high-level phosphorus oxidation to phosphate in wastewater.
  • To compare chemical and electrochemical Fenton's reagent methods for phosphorus removal.

Main Methods:

  • Chemical oxidation using Fenton's reagent ([H2O2]/[Fe2+]) at pH 3.5.
  • Electrochemical generation of Fenton's reagent via cathodic oxygen reduction at pH 2-2.5.

Main Results:

  • Chemical oxidation achieved up to 98% phosphorus removal for 250-750 mg/l P.

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  • Electrochemical treatment yielded quantitative phosphorus removal for 80-160 mg/l P.
  • Operative costs of both methods were found to be comparable.

    • Conclusions:

    • Fenton's reagent, both chemically and electrochemically generated, is effective for oxidizing hypophosphites and phosphites to phosphate.
    • Electrochemical treatment offers a viable alternative for phosphorus oxidation in wastewater.
    • The study demonstrates efficient phosphorus management strategies for industrial wastewater.