Effects of persulfate and hydrogen peroxide on oxidation of oxalate by pulsed corona discharge

被引：16

作者：

Tikker, Priit ^{[1
]}

Dulova, Niina ^{[1
]}

Kornev, Iakov ^{[2
]}

Preis, Sergei ^{[1
]}

机构：

[1] Tallinn Univ Technol, Dept Mat & Environm Technol, Ehitajate Tee 5, EE-19086 Tallinn, Estonia

[2] Natl Res Tomsk Polytech Univ, R&D Lab Clean Water, 30 Lenin Ave, Tomsk 634050, Russia

来源：

CHEMICAL ENGINEERING JOURNAL | 2021年 / 411卷

关键词：

AOPs; Plasma; Activated persulfate; Hydroxyl radicals; Gas-liquid contact surface; Oxalic acid;

D O I：

10.1016/j.cej.2021.128586

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Application of gas-phase pulsed corona discharge (PCD) to oxidation of aqueous pollutants shows unequalled energy efficiency among advanced oxidation processes (AOPs). Improved AOPs often activate extrinsic oxidants. Experimental research was undertaken into sodium persulfate and hydrogen peroxide activation by PCD in oxidation of 1.11 mM oxalate. Oxidant and target compound concentration ratios, pH, gas-liquid contact surface and pulse repetition frequency were studied as control parameters. Results implicated a beneficial effect at oxalate/persulfate molar ratios from 1:0.1 to 1:1 in acidic medium with the optimum at 1:0.5, moderate contact surface and lower frequency. However, the observed synergism of PCD/PS combination decreased with increasing the initial pH of the treated solution. Hydrogen peroxide exhibited negative or neutral impact in all media. Non-assisted PCD proved the most energy efficient approach towards water treatment at neutral and alkaline conditions.

引用

页数：9

共 57 条

[1] Degradation of antibiotic enrofloxacin in water by gas-liquid nsp-DBD plasma: Parametric analysis, effect of H2O2 and CaO2 additives and exploration of degradation mechanisms [J].