| Texto completo | |
| Autor(es): |
Moreira, Ailton Jose
[1, 2]
;
Freschi, Carolina Dakuzaku
[1]
;
Pereira, Ernesto Chaves
[2]
;
Giovanni Freschi, Gian Paulo
[1]
Número total de Autores: 4
|
| Afiliação do(s) autor(es): | [1] Univ Fed Alfenas, Inst Sci & Technol, UNIFAL MG, LAFFEQ, BR-37715400 Pocos De Caldas, MG - Brazil
[2] Univ Fed Sao Carlos, UFSCar SP, Chem Dept, BR-13565905 Sao Carlos, SP - Brazil
Número total de Afiliações: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ENVIRONMENTAL MONITORING AND ASSESSMENT; v. 193, n. 5 MAY 2021. |
| Citações Web of Science: | 0 |
| Resumo | |
A fast, efficient, and non-chromatographic method was presented in this study for nitrite, nitrate, and p-nitrophenol (N-compounds) extraction and speciation analysis of environmental samples. By applying ultrasound-assisted solid-liquid extraction (USLE), analytes were efficiently extracted from water, soil, or sediment collected in areas of environmental disaster. These analytes were selectively converted to NO(g) through UV photolysis (NO3-), H2O2/UV photocatalysis (PNP), and direct conversion (NO2-). Following conversion, NO(g) was separated from the liquid phase and determined by high-resolution continuum source molecular absorption spectrometry (HR-CS MAS). The LODs obtained were 0.0970.004 mg L-1 for nitrite, 0.1190.004 mg L-1 for nitrate, and 0.090 +/- 0.006 mg L-1 for p-nitrophenol. On applying this speciation method to environmental samples, concentrations were found to be up to 0.99 +/- 0.03 mg L-1 (NO2-), 49.80 +/- 2.5 mg L-1 (NO3-), and 0.10 +/- 0.02 mg L-1 (PNP). Finally, addition/recovery study of real water, soil, and sediment samples showed 101 +/- 2% recovery for NO2-, 100 +/- 1% for NO3-, and 96 +/- 5% for PNP. (AU) | |
| Processo FAPESP: | 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais |
| Beneficiário: | Elson Longo da Silva |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |
| Processo FAPESP: | 17/11986-5 - Geração e Armazenamento de Novas Energias: trazendo desenvolvimento tecnológico para o país |
| Beneficiário: | Ana Flávia Nogueira |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Centros de Pesquisa Aplicada |
| Processo FAPESP: | 14/50249-8 - Green chemistry: sustainable synthetic methods employing benign solvents, safer reagents, and bio-renewable feedstock |
| Beneficiário: | Arlene Gonçalves Corrêa |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Centros de Pesquisa Aplicada |