Pulsed corona discharge for degradation of aqueous humic substances

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 language	English
Pages (from-to)	238-245
Number of pages	8
Journal	Water Science and Technology: Water Supply
Volume	11
Issue number	2
DOIs	https://doi.org/10.2166/ws.2011.045
Publication status	Published - 2011

Keywords

Advanced oxidation processes
AOPs
Energy efficiency
Humic acids
Ozone
Water

ASJC Scopus subject areas

Water Science and Technology

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10.2166/ws.2011.045

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Panorel, I., Kornev, I., Hatakka, H., & Preis, S. (2011). Pulsed corona discharge for degradation of aqueous humic substances. Water Science and Technology: Water Supply, 11(2), 238-245. https://doi.org/10.2166/ws.2011.045

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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.",

keywords = "Advanced oxidation processes, AOPs, Energy efficiency, Humic acids, Ozone, Water",

author = "Iris Panorel and Iakov Kornev and Henry Hatakka and Sergey Preis",

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AU - Panorel, Iris

AU - Kornev, Iakov

AU - Hatakka, Henry

AU - Preis, Sergey

PY - 2011

Y1 - 2011

N2 - 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.

AB - 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.

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KW - Energy efficiency

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KW - Ozone

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