Pulsed corona discharge for degradation of aqueous humic substances

Iris Panorel, Iakov Kornev, Henry Hatakka, Sergey Preis

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The research into oxidation of aqueous humic substances (HS) with pulsed corona discharge (PCD) was undertaken to estimate the energy efficiency of the treatment. The PCD system consists of a voltage pulse generator and reactor, in which the gas-phase discharge generating ·OH radicals and ozone treats the water showered between electrodes. The influence of HS initial concentration, pulse repetition frequency,water flow rate, and the atmosphere composition was evaluated by the decrease in total organic carbon (TOC) and color. The PCD treatment reduced TOC by 40 to 50% and the color by up to 97%. The PCD energy efficiency ranged about 20 g kW -1 h -1 in air and 30 g kW -1 h -1 in oxygen for the lowest initial color of about 50 Pt-Co degrees. Ozone contributed about 30% to the color reduction and only 15% to the reduction in TOC, indicating predominant role of ·OH radicals in mineralization of oxidation by-products.

Original languageEnglish
Pages (from-to)238-245
Number of pages8
JournalWater Science and Technology: Water Supply
Volume11
Issue number2
DOIs
Publication statusPublished - 2011

Keywords

  • Advanced oxidation processes
  • AOPs
  • Energy efficiency
  • Humic acids
  • Ozone
  • Water

ASJC Scopus subject areas

  • Water Science and Technology

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