Geração sonoquímica de oxidantes em solução aquosa saturada de tetracloreto de carbono
In this work the CCl4 degradation in aqueous solution by sonication with 40 kHz commercial ultrasonic bath was investigated. Sonochemical degradation of CCl4 occur by the cleavage of C-Cl bond into the cavitation bubbles. Oxidation reactions and the pH decreasing in the bulk solution during sonicati...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Química
2002-01-01
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| Series: | Química Nova |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422002000400009 |
| _version_ | 1819297373978886144 |
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| author | Borges Sivanildo da Silva Korn Mauro |
| author_facet | Borges Sivanildo da Silva Korn Mauro |
| author_sort | Borges Sivanildo da Silva |
| collection | DOAJ |
| description | In this work the CCl4 degradation in aqueous solution by sonication with 40 kHz commercial ultrasonic bath was investigated. Sonochemical degradation of CCl4 occur by the cleavage of C-Cl bond into the cavitation bubbles. Oxidation reactions and the pH decreasing in the bulk solution during sonication were attributed to chlorine radicals produced by CCl4 sonolysis, leading to increase the chloride concentration. The formation of oxidizing agents was evaluated employing I- and Fe2+ ion solutions, converted to I2 and HIO, and Fe3+, respectively. The amount of chloride and hydronium ions produced after 3 min of irradiation was 11.52 and 12.19 mmol, respectively, suggesting that the same reaction was involved to produce these ions. Fe2+ oxidation and the pH variation were monitored to estimate chlorine radical formation rate in the presence (0.107 mumol s-1) and absence (0.092 mumol s-1) of metallic ion during the first minute of sonication. |
| first_indexed | 2024-12-24T05:12:59Z |
| format | Article |
| id | doaj.art-3156b084fb1f4b9d8fa4f6514bbe8e87 |
| institution | Directory Open Access Journal |
| issn | 0100-4042 1678-7064 |
| language | English |
| last_indexed | 2024-12-24T05:12:59Z |
| publishDate | 2002-01-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Química Nova |
| spelling | doaj.art-3156b084fb1f4b9d8fa4f6514bbe8e872022-12-21T17:13:37ZengSociedade Brasileira de QuímicaQuímica Nova0100-40421678-70642002-01-01254558562Geração sonoquímica de oxidantes em solução aquosa saturada de tetracloreto de carbonoBorges Sivanildo da SilvaKorn MauroIn this work the CCl4 degradation in aqueous solution by sonication with 40 kHz commercial ultrasonic bath was investigated. Sonochemical degradation of CCl4 occur by the cleavage of C-Cl bond into the cavitation bubbles. Oxidation reactions and the pH decreasing in the bulk solution during sonication were attributed to chlorine radicals produced by CCl4 sonolysis, leading to increase the chloride concentration. The formation of oxidizing agents was evaluated employing I- and Fe2+ ion solutions, converted to I2 and HIO, and Fe3+, respectively. The amount of chloride and hydronium ions produced after 3 min of irradiation was 11.52 and 12.19 mmol, respectively, suggesting that the same reaction was involved to produce these ions. Fe2+ oxidation and the pH variation were monitored to estimate chlorine radical formation rate in the presence (0.107 mumol s-1) and absence (0.092 mumol s-1) of metallic ion during the first minute of sonication.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422002000400009sonochemical reactionsoxidizing species generationcarbon tetrachloride sonolysis |
| spellingShingle | Borges Sivanildo da Silva Korn Mauro Geração sonoquímica de oxidantes em solução aquosa saturada de tetracloreto de carbono Química Nova sonochemical reactions oxidizing species generation carbon tetrachloride sonolysis |
| title | Geração sonoquímica de oxidantes em solução aquosa saturada de tetracloreto de carbono |
| title_full | Geração sonoquímica de oxidantes em solução aquosa saturada de tetracloreto de carbono |
| title_fullStr | Geração sonoquímica de oxidantes em solução aquosa saturada de tetracloreto de carbono |
| title_full_unstemmed | Geração sonoquímica de oxidantes em solução aquosa saturada de tetracloreto de carbono |
| title_short | Geração sonoquímica de oxidantes em solução aquosa saturada de tetracloreto de carbono |
| title_sort | geracao sonoquimica de oxidantes em solucao aquosa saturada de tetracloreto de carbono |
| topic | sonochemical reactions oxidizing species generation carbon tetrachloride sonolysis |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422002000400009 |
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