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https://locus.ufv.br//handle/123456789/25035
Tipo: | Artigo |
Título: | Direct infusion esi-ms applied in the detection of byproducts due to reductive degradation of acetamiprid by zero-valent iron |
Autor(es): | Cruz, Jean C. Reis, Marina F. Salvador, Marília M. Almeida, Marciano F. Augusti, Rodinei Lopes, Renata P. |
Abstract: | This study investigated the reductive degradation of acetamiprid (5 mg L-1) in aqueous medium (at pH 2.0) induced by zero-valent iron (50 mg). The process was monitored using high-performance liquid chromatography (HPLC) to determine the degradation rate as a function of reaction time, and direct infusion electrospray ionization mass spectrometry (DI-ESI-MS) to search for (and potentially characterize) any possible byproducts formed during degradation. The results obtained via HPLC showed that after 60 min, the degradation of the substrate reached nearly 100% in an acidic medium, whereas the mineralization rate (as determined by total organic carbon measurements) was as low as 3%. Data obtained by DI-ESI-MS showed that byproducts were formed mainly by insertions of hydrogen atoms into the nitrile, imine, and pyridine ring moieties, in addition to the observation of chlorine substitution by hydrogen replacement (hydrodechlorination) reactions. |
Palavras-chave: | Acetamiprid Degradation Zero-valent iron (ZVI) Direct infusion electrospray ionization mass spectrometry (ESI-MS) Byproducts |
Editor: | Química Nova |
Tipo de Acesso: | Open Access |
URI: | http://dx.doi.org/10.5935/0100-4042.20150122 http://www.locus.ufv.br/handle/123456789/25035 |
Data do documento: | Set-2015 |
Aparece nas coleções: | Artigos |
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