20 kHz sonoelectrochemical degradation of perchloroethylene in sodium sulfate aqueous media: Influence of the operational variables in batch mode

被引：33

作者：

Saez, Veronica ^{[1
]}

Deseada Esclapez, Maria ^{[2
,3
]}

Tudela, Ignacio ^{[1
]}

Bonete, Pedro ^{[2
,3
]}

Louisnard, Olivier ^{[4
,5
]}

Gonzalez-Garcia, Jose ^{[1
]}

机构：

[1] Grp Nuevos Desarrollos Tecnol Electroquim Sonoele, Alicante 03080, Spain

[2] Univ Alicante, Grp Fotoquim & Electroquim Semicond, Dept Quim, E-03080 Alicante, Spain

[3] Univ Alicante, Inst Univ Electroquim, E-03080 Alicante, Spain

[4] Ecole Mines Albi, Ctr RAPSODEE, F-81013 Albi, France

[5] Univ Toulouse, CNRS, F-81013 Albi, France

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2010年 / 183卷 / 1-3期

关键词：

Perchloroethylene; Sonoelectrochemistry; Chlorinated compounds; Dechlorination; Groundwater; ELECTROCHEMICAL DEGRADATION; ORGANIC-COMPOUNDS; WASTE-WATER; ULTRASOUND; ELECTRODES; OXIDATION; REDUCTION; DECHLORINATION; DISINFECTION; DESTRUCTION;

D O I：

10.1016/j.jhazmat.2010.07.074

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A preliminary study of the 20 kHz sonoelectrochemical degradation of perchloroethylene in aqueous sodium sulfate has been carried out using controlled current density degradation sonoelectrolyses in batch mode. An important improvement in the viability of the sonochemical process is achieved when the electrochemistry is implemented, but the improvement of the electrochemical treatment is lower when the 20 kHz ultrasound field is simultaneously used. A fractional conversion of 100% and degradation efficiency around 55% are obtained independently of the ultrasound power used. The current efficiency is also enhanced compared to the electrochemical treatment and a higher speciation is also detected; the main volatile compounds produced in the electrochemical and sonochemical treatment, trichloroethylene and dichloroethylene, are not only totally degraded, but also at shorter times than in the sonochemical or electrochemical treatments. (c) 2010 Elsevier B.V. All rights reserved.

引用

页码：648 / 654

页数：7

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