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51.
Ferreira Leide Lene C. Abreu Marina P. Costa Camila B. Leda Paulo O. Behrens Maria Dutra dos Santos Elisabete Pereira 《Food and environmental virology》2022,14(2):120-137
Food and Environmental Virology - The use of natural resources for the prevention and treatment of diseases considered fatal to humanity has evolved. Several medicinal plants have nutritional and... 相似文献
52.
Schirmer Waldir Nagel dos Santos Liliana Andréa Martins Kelly Geronazzo Gueri Matheus Vitor Diniz Jucá José Fernando Thomé 《Journal of Material Cycles and Waste Management》2023,25(5):2887-2899
Journal of Material Cycles and Waste Management - Anaerobic digestion of the organic fraction of municipal solid wastes is a well-established process for biogas production and various forms of... 相似文献
53.
H. Pizarro M. S. Vera A. Vinocur G. Pérez M. Ferraro R. J. Menéndez Helman M. dos Santos Afonso 《Environmental science and pollution research international》2016,23(6):5143-5153
Since it was commercially introduced in 1974, glyphosate has been one of the most commonly used herbicides in agriculture worldwide, and there is growing concern about its adverse effects on the environment. Assuming that glyphosate may increase the organic turbidity of water bodies, we evaluated the effect of a single application of 2.4?±?0.1 mg l?1 of glyphosate (technical grade) on freshwater bacterioplankton and phytoplankton (pico, micro, and nanophytoplankton) and on the physical and chemical properties of the water. We used outdoor experimental mesocosms under clear and oligotrophic (phytoplanktonic chlorophyll a?=?2.04 μg l?1; turbidity?=?2.0 NTU) and organic turbid and eutrophic (phytoplanktonic chlorophyll a?=?50.3 μg l?1; turbidity?=?16.0 NTU) scenarios. Samplings were conducted at the beginning of the experiment and at 1, 8, 19, and 33 days after glyphosate addition. For both typologies, the herbicide affected the abiotic water properties (with a marked increase in total phosphorus), but it did not affect the structure of micro and nanophytoplankton. In clear waters, glyphosate treatment induced a trend toward higher bacteria and picoeukaryotes abundances, while there was a 2 to 2.5-fold increase in picocyanobacteria number. In turbid waters, without picoeukaryotes at the beginning of the experiment, glyphosate decreased bacteria abundance but increased the number of picocyanobacteria, suggesting a direct favorable effect. Moreover, our results show that the impact of the herbicide was observed in microorganisms from both oligo and eutrophic conditions, indicating that the impact would be independent of the trophic status of the water body. 相似文献
54.
Exposure of workers in mineral processing industries in Brazil 总被引:2,自引:0,他引:2
Lipsztein JL da Cunha KM Azeredo AM Julião L Santos M Melo DR Simões Filho FF 《Journal of environmental radioactivity》2001,54(1):189-199
The mining, milling and processing of uranium and thorium bearing minerals may result in radiation doses to workers. A preliminary survey pilot program, that included six mines in Brazil (two coal mines, one niobium mine, one nickel mine, one gold mine and one phosphate mine), was launched in order to determine the need to control the radioactive exposure of the mine-workers. Our survey consisted of the collection and analysis of urine samples, complemented by feces and air samples. The concentrations of uranium, thorium and polonium were measured in these samples and compared to background data from family members of the workers living in the same dwelling and from residents from the general population of Rio de Janeiro. The results from the coal mines indicated that the inhalation of radon progeny may be a source of occupational exposure. The workers from the nickel, gold and phosphate mines that were visited do not require a program to control internal radiological doses. The niobium mine results showed that in some areas of the industry exposure to thorium and uranium might occur. 相似文献
55.
Maria J. Ferreira Manuel F. Almeida Sílvia C. Pinho Isabel C. Santos 《Waste management (New York, N.Y.)》2010,30(6):1091-1100
Due to the amounts of chromium in the leachate resulting from leather leaching tests, chromium sulfate tanned leather wastes are very often considered hazardous wastes. To overcome this problem, one option could be recovering the chromium and, consequently, lowering its content in the leather scrap. With this objective, chromium leather scrap was leached with sulfuric acid solutions at low temperature also aiming at maximizing chromium removal with minimum attack of the leather matrix. The effects of leather scrap dimension, sulfuric acid and sodium sulfate concentration in the solutions, as well as extraction time and temperature on chromium recovery were studied, and, additionally, organic matrix degradation was evaluated. The best conditions found for chromium recovery were leather scrap conditioning using 25 mL of concentrated H2SO4/L solution at 293 or 313 K during 3 or 6 days. Under such conditions, 30–60 ± 5% of chromium was recovered and as low as 3–6 ± 1% of the leather total organic carbon (TOC) was dissolved. Using such treatment, the leather scrap area and volume are reduced and the residue is a more brittle material showing enhanced anaerobic biodegradability. Although good recovery results were achieved, due to the fact that the amount of chromium in eluate exceeded the threshold value this waste was still hazardous. Thus, it needs to be methodically washed in order to remove all the chromium de-linked from collagen. 相似文献
56.
57.
Domingues Luciene Gachet Ferrari Santos Ferreira Gisleiva Cristina dos Pires Marta Siviero Guilherme 《Journal of Material Cycles and Waste Management》2022,24(1):378-385
Journal of Material Cycles and Waste Management - Waste foundry sand (WFS) is a waste generated during the molding of metal parts and primarily discarded in landfills, which generates environmental... 相似文献
58.
de Mello Santos Vitor Homem Campos Thalita Laua Reis Espuny Maximilian de Oliveira Otávio José 《Environmental science and pollution research international》2022,29(1):349-370
Environmental Science and Pollution Research - The growth in global production and consumption rates has resulted in increased pollution generation by industrial companies. To this end, cleaner... 相似文献
59.
Carvalho Fernando L. Pinto Diana Schio Rejiane R. dos Santos Jaqueline P. Ketzer Felipe Silva Luis F. O. Dotto Guilherme L. 《Environmental science and pollution research international》2022,29(44):66348-66358
Environmental Science and Pollution Research - A real industrial effluent from the pre-treatment and painting processes was polished through adsorption using alternative biochar derived from grape... 相似文献
60.
Vilar Vítor J.P. Dos Santos Elisama V. Martínez-Huitle Carlos A. 《Environmental science and pollution research international》2021,28(19):23565-23567
Environmental Science and Pollution Research - 相似文献