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Shah V, Bhaliya J, Patel GM, Joshi P. Room-Temperature Chemiresistive Gas Sensing of SnO2 Nanowires: A Review. J Inorg Organomet Polym Mater 2022. [DOI: 10.1007/s10904-021-02198-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Lima do Rêgo E, Santos da Silva JD, Costa Nakamura T, Diniz PHGD, Oliveira UR, Souza JRD. Distribution of organochlorine, organophosphates, carbamate, thiocarbamate, pyrethroids, and strobilurins in surface sediments of the Rio de Ondas watershed by GC-MS. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2021; 56:357-369. [PMID: 34011245 DOI: 10.1080/03601234.2021.1885263] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The determination of some pesticides in surface sediments can provide important information about their distribution in the water column. This work aimed to determine the distribution of the classes of pesticides along the Ondas River's hydrographic basin (ORHB), in eighteen different points, during the dry and rainy periods. The pesticides were extracted from the sediment samples by solid-liquid extraction and then analyzed using a gas chromatograph coupled to mass spectrometry. After the development and validation of the method, nineteen pesticides from the group of organochlorine, organophosphates, carbamate and thiocarbamate, pyrethroids, and strobilurins were quantified in at least one point in the two collection periods, with accuracy varying between 86 and 126%. The average concentrations were 0.020 ng g-1 (carbofuran) to 249.123 ng g-1 (dimethoate) and 0.029 ng g-1 (carbofuran and sulfotep) to 533.522 ng g-1 in the dry and rainy periods, respectively. The results showed a wide distribution of pesticide residues in the ORHB, with higher levels for dimethoate, phenitrothion, and malathion, which may be related to their agricultural use in the region. In Brazil, it does not have specific legislation for maximum permitted values of pesticides in sediment, allowing for inappropriate or prohibited use and, consequently, affecting water quality.
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Affiliation(s)
- Enoc Lima do Rêgo
- Institute of Chemical, Graduate Program in Chemistry, University of Brasília, Brasília, DF, Brazil
- Center for Exact Sciences and Technologies, Graduate Program in Chemistry Pure and Applied, Federal University of Western Bahia, Barreiras, BA, Brazil
- Department of Human Sciences, State University of Bahia, Barreiras, BA, Brazil
| | - José Domingos Santos da Silva
- Center for Exact Sciences and Technologies, Graduate Program in Chemistry Pure and Applied, Federal University of Western Bahia, Barreiras, BA, Brazil
| | - Thamilin Costa Nakamura
- Center for Exact Sciences and Technologies, Graduate Program in Chemistry Pure and Applied, Federal University of Western Bahia, Barreiras, BA, Brazil
- Interdisciplinary Center for Energy and Environment, Federal University of Bahia, Salvador, BA, Brazil
| | - Paulo Henrique Gonçalves Dias Diniz
- Center for Exact Sciences and Technologies, Graduate Program in Chemistry Pure and Applied, Federal University of Western Bahia, Barreiras, BA, Brazil
| | - Uldérico Rios Oliveira
- Interdisciplinary Center for Energy and Environment, Federal University of Bahia, Salvador, BA, Brazil
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