Showing papers by "Maria Lúcia Ribeiro published in 2007"
TL;DR: Indirect and direct estimates could be used to predict pesticide behavior in soil, and consequently, to evaluate the potential of groundwater contamination, and to provide subsidies for making decisions more quickly and efficiently.
Abstract: A discussion about groundwater contamination is presented in this work. Contamination by agricultural activity, more specifically by pesticides is emphasized. Indirect and direct estimates could be used to predict pesticide behavior in soil, and consequently, to evaluate the potential of groundwater contamination. These results could be applied to advise about the possibility of groundwater contamination by pesticides, and to provide subsidies for making decisions more quickly and efficiently.
42 citations
TL;DR: The method is successfully applied to the analysis of shiitake mushrooms cultivated on eucalyptus logs treated with Benlate 500 (benomyl as active ingredient) under natural environmental conditions.
Abstract: A method is optimized to determine benomyl (as carbendazim derivative) in shiitake mushrooms. It is based on the extraction of the fungicide with an ethyl acetate‐hexane mixture and a further analysis of the extract by high-performance liquid chromatography ‐UV. Mean recoveries are evaluated and range from 76% to 86% with relative standard deviation between 1.1% and 5.8%. The limit of quantitation (0.5 mg/Kg) is lower than the maximum residue level established by European legislation. The method is successfully applied to the analysis of shiitake mushrooms cultivated on eucalyptus logs treated with Benlate 500 (benomyl as active ingredient) under natural environmental conditions.
5 citations
10 Sep 2007-Journal of Environmental Science and Health Part B-pesticides Food Contaminants and Agricultural Wastes
TL;DR: The composting process has advantages such as urban solid waste reduction and landfill life-span increase, however the MSW compost quality, which can be utilized for agricultural purposes, should be evaluated and be controlled.
Abstract: Persistent organic pollutants (POPs), organochlorine pesticides and polychlorinated biphenyls (PCBs), listed as per the Stockholm Convention (α -HCH, β -HCH, γ -HCH, p,p′-DDT, o,p′-DDT, p,p′-DDD, p,p′-DDE, aldrin, endrin, dieldrin, PCBs 28, 52, 118, 138, 153, and 180), were analyzed in municipal solid waste (MSW) compost samples from three different Brazilian composting plants located in three Sao Paulo State cities: Araras, Araraquara and Sao Paulo (Vila Leopoldinha). Quantitative and qualitative analyses were carried out using gas chromatography electron capture detection (GC-ECD) and gas chromatography mass spectrometry (GC-MS) (Ion Trap, electron impact ionization), respectively. The samples were analyzed in triplicate and the target POPs were not detected by GC-ECD. Twelve pollutants were identified in two samples when qualitative analysis (GC-MS) was used (β -HCH, γ -HCH, p,p′-DDT, o,p′-DDT, p,p′-DDD, and p,p′-DDE, PCBs 28, 118, 138, 153 and 180). The composting process has advantages such as urban ...
4 citations
07 Jan 2007
TL;DR: In this article, a trabalho caracteriza a geracao e disposicao final dos Residuos de Servicos de Saude gerados em unidades de saude de pequeno porte, no municipio de Jau-SP.
Abstract: Considerando a quantidade expressiva de residuos gerados pelas unidades de saude de pequeno porte, a preocupacao crescente com o gerenciamento destes residuos e a falta de investigacoes sobre o tema, este trabalho caracteriza a geracao e disposicao final dos Residuos de Servicos de Saude gerados em unidades de saude de pequeno porte, no municipio de Jau-SP.
1 citations