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41.
V. M. Starling Maria Clara Costa Elizângela P. Souza Felipe A. Machado Elayne C. de Araujo Juliana Calábria Amorim Camila C. 《Environmental science and pollution research international》2021,28(14):17355-17368
Environmental Science and Pollution Research - This work investigated an innovative alternative to improve municipal wastewater treatment plant effluent (MWWTP effluent) quality aiming at the... 相似文献
42.
Andrade Mariana Carvalho Araujo Nara Santos Vianna Maria Isabel Pereira Cangussu Maria Cristina Teixeira Gomes-Filho Isaac Suzart Ribeiro Daniel Araki Cury Patrícia Ramos dos Santos Jean Nunes 《Environmental science and pollution research international》2021,28(43):60717-60725
Environmental Science and Pollution Research - Studies have shown that domestic waste collectors are exposed to toxicants including infectious pathogens, which may be linked to their oral health... 相似文献
43.
de Araujo Leandro Goulart Vieira Ludmila Cabreira Canevesi Rafael Luan Sehn da Silva Edson Antonio Watanabe Tamires de Padua Ferreira Rafael Vicente Marumo Júlio Takehiro 《Environmental science and pollution research international》2022,29(30):45221-45229
Environmental Science and Pollution Research - The main goal of this study was to assess alternatives to the current challenges on environmental quality and circular economy. The former is here... 相似文献
44.
Lilia Araujo Noreiva Villa Nuris Camargo Maikellys Bustos Theobaldo Garc��a Avismelsi de Jesus Prieto 《Environmental Chemistry Letters》2011,9(1):13-18
The occurrence of pharmaceuticals in natural waters is a potential threat to human nutrition and ecosystem quality. The persistence
of the acidic pharmaceuticals gemfibrozil, naproxen and mefenamic acid was studied in surface waters of Maracaibo Lake and
Tule reservoir (Venezuela) under laboratory conditions. A quick and easy analytical method was developed for the determination
of the acidic drugs at microgram per liter levels using aqueous derivatization, liquid–liquid extraction and gas chromatography–mass
spectrometry. Pharmaceuticals degradation followed a pseudo first-order kinetic and their half-lives were calculated for every
experimental condition. Under sunlight, naproxen and mefenamic acid were degraded at moderate rates with half-lives from 9.6 ± 0.5
to 27.0 ± 6.6 days, while gemfibrozil had a higher persistence (t
1/2 = 119.5 ± 15.6 − 288.8 ± 61.3 days). 相似文献
45.
Telmer K Costa M Simões Angélica R Araujo ES Maurice Y 《Journal of environmental management》2006,81(2):101-113
We present results of mercury (Hg) in surface waters and soils and an analysis of satellite imagery from the Tapajós River basin, Brazilian Amazon, and the Reserva Garimpeira do Tapajós, the legal gold mining district of the basin. Hg bound to suspended sediment was roughly 600 and 200 times the concentration of dissolved Hg per litre of water, in impacted and pristine areas, respectively. Suspended sediments thus represent the major pathway of river-borne Hg. Median concentrations of Hg in suspended load from both impacted and pristine waters were 134 ppb, and 80% of samples were below 300ppb-in the range of naturally occurring surficial materials in the tropics. Regionally, riverine Hg fluxes were proportional to the concentration of total suspended solids. This shows that the dominant source of Hg is the sediment itself rather than anthropogenic mercury discharge from the small-scale mines. To independently test this conclusion, a mass balance was performed. A conservative calculation of the annual export of mercury (Hg) from the Creporí River (a minimum) was 1.6 tonnes for the year 1998-it could be significantly larger. This amount of Hg is difficult to account for by anthropogenic discharge alone, confirming that enhanced physical erosion caused by sluicing and dredging operations is the dominant source of Hg. We therefore conclude that gold mining operations are primarily responsible for elevated Hg concentrations. The dominant source of contamination is not, however, the loss of Hg in the gold amalgamation process. Rather, the disturbance and mobilization of large quantities of Hg-rich sediment and floodplain soil into the water column during mining operations is the source of contamination. These findings shift the focus of remediation and prevention efforts away from Hg control toward soil and sediment erosion control. The minimization or elimination of Hg losses in the mining process remains important for the health of local peoples and environments, but keeping basin soils and sediments in place would be a much more effective means of minimizing Hg fluxes to the region's rivers. To gain a spatial and historical perspective on the source and extent of emissions, satellite imagery was used. We were able to reconstruct historical mining activity, locate impacted areas, and estimate historical Hg fluxes with the imagery. To do so, the spectral characteristics of satellite images were calibrated to the concentration of suspended sediment in the rivers, which, in turn, is proportional to the Hg concentration. This analysis shows that mining-induced sediment plumes have been a dominant source of sediment to the Tapajós River system for decades. As well, the intensity and location of these emissions has varied through time. For example, sediment discharge from the Creporí River was greater in 1985 than in 1998; and the tributaries on the west bank of the Tapajós were actively being mined in 1985 but had been abandoned in 1998. This type of information should greatly assist in understanding original and ongoing sources of emissions, and in managing prevention and remediation efforts. 相似文献
46.
47.
Deivisson Lopes Cunha Frederico Goytacazes de Araujo Marcia Marques 《Environmental science and pollution research international》2017,24(31):24076-24091
This review focused on seven psychoactive drugs being six benzodiazepines (alprazolam, bromazepam, clonazepam, diazepam, lorazepam, and oxazepam) and one antidepressant (citalopram) widely consumed by modern society and detected in different aqueous matrices (drinking water, surface water, groundwater, seawater, estuary water, influent and effluent of wastewater treatment plants). The review included 219 selected scientific papers from which 1642 data/entries were obtained, each entry corresponding to one target compound in one aqueous matrix. Concentrations of all investigated drugs in all aqueous matrices varied from 0.14 to 840,000 ng L?1. Citalopram presented the highest concentrations in the aqueous matrices. Based on the Wilcoxon-Mann-Whitney test, differences between wastewater influents and effluents were not significant for most wastewater categories, suggesting that conventional wastewater treatment systems as such do not remove or remove partially these compounds. High-income countries showed much lower concentrations in surface water than the group formed by upper-middle-, lower-middle-, and low-income countries. Regarding analytical methods, solid-phase extraction (SPE) was by far the most used extraction method (83%) and performance liquid chromatography (HPLC) (73%) coupled to mass spectrometry (99%) the most common analytical method. Changes in behavior and in survival rates were the most common effects reported on bioindicators (aquatic species) due to the presence of these drugs in water. Concentrations of psychoactive drugs found in surface waters were most of the time within the range that caused measurable toxic effects in ecotoxicity assays. 相似文献
48.
Estefanía Bonnail Lucas M. Buruaem Lucas G. Morais Giuliana S. Araujo Denis M. S. Abessa Aguasanta M. Sarmiento T. Ángel DelValls 《Environmental geochemistry and health》2018,40(4):1465-1480
The Ribeira de Iguape River (Southeast Brazil) is metal contaminated by mining activities. Despite it has been cataloged as “in via of restoration” by the literature, this basin is still a sink of pollution in some segments of the fluvial system. This study aimed to assess the sediment quality in the lower part of the RIR basin. The employed approach was based on biological responses of the freshwater clam Corbicula fluminea after 7-day exposure bioassays using as the reference site the Perequê Ecological Park. Toxic responses (burial activity and lethality) and biochemical biomarkers (GST, GR, GPx, LPO, MTs, AChE and DNA damage) were evaluated and then integrated with metal bioavailability and chemical concentrations to address the sediment quality in the area through the weight-of-evidence approach. A multivariate analysis identified linkages between biological responses and contamination. Results pointed that, despite being below the benchmarks of the US Environmental Protection Agency, there is slight metal contamination in the lower part of the basin which induces oxidative stress in C. fluminea; other toxic responses were sometimes attributed to As and Cr bioaccumulation. The sediment quality values (TEL–PEL values in mg/kg) were calculated for the current study for As (0.63–1.31), Cr (3.5–11.05), Cs (1.0–1.17), Cu (6.32–7.32), Ni (6.78–7.46), Ti (42.0–215), V (1.77–8.00). By comparison with other international guidelines, the sediment quality of the lower basin of the Vale de Ribeira does not identify a significant environmental risk. 相似文献
49.
A global evaluation of metabolic theory as an explanation for terrestrial species richness gradients 总被引:5,自引:0,他引:5
Hawkins BA Albuquerque FS Araujo MB Beck J Bini LM Cabrero-Sañudo FJ Castro-Parga I Diniz-Filho JA Ferrer-Castan D Field R Gómez JF Hortal J Kerr JT Kitching IJ León-Cortés JL Lobo JM Montoya D Moreno JC Olalla-Tárraga MA Pausas JG Qian H Rahbek C Rodríguez MA Sanders NJ Williams P 《Ecology》2007,88(8):1877-1888
We compiled 46 broadscale data sets of species richness for a wide range of terrestrial plant, invertebrate, and ectothermic vertebrate groups in all parts of the world to test the ability of metabolic theory to account for observed diversity gradients. The theory makes two related predictions: (1) In-transformed richness is linearly associated with a linear, inverse transformation of annual temperature, and (2) the slope of the relationship is near -0.65. Of the 46 data sets, 14 had no significant relationship; of the remaining 32, nine were linear, meeting prediction 1. Model I (ordinary least squares, OLS) and model II (reduced major axis, RMA) regressions then tested the linear slopes against prediction 2. In the 23 data sets having nonlinear relationships between richness and temperature, split-line regression divided the data into linear components, and regressions were done on each component to test prediction 2 for subsets of the data. Of the 46 data sets analyzed in their entirety using OLS regression, one was consistent with metabolic theory (meeting both predictions), and one was possibly consistent. Using RMA regression, no data sets were consistent. Of 67 analyses of prediction 2 using OLS regression on all linear data sets and subsets, two were consistent with the prediction, and four were possibly consistent. Using RMA regression, one was consistent (albeit weakly), and four were possibly consistent. We also found that the relationship between richness and temperature is both taxonomically and geographically conditional, and there is no evidence for a universal response of diversity to temperature. Meta-analyses confirmed significant heterogeneity in slopes among data sets, and the combined slopes across studies were significantly lower than the range of slopes predicted by metabolic theory based on both OLS and RMA regressions. We conclude that metabolic theory, as currently formulated, is a poor predictor of observed diversity gradients in most terrestrial systems. 相似文献
50.
Tainã Gonçalves Loureiro Pedro Manuel Anastácio Sérgio Luiz de Siqueira Bueno Paula Beatriz Araujo 《Environmental monitoring and assessment》2018,190(9):559
Invasive species are one of the main threats to biodiversity. When an alien species is introduced into a new environment, fast identification and definition of management strategies may avoid or minimize impacts. When an invasive species is already established, the most adopted approaches are population control and monitoring. In order to perform such strategies, assessment of characteristics of the invasive population is imperative. This study tested a new method of population size estimation and monitoring in an invasive population of crayfish Procambarus clarkii in a conservation area in the Atlantic Rain Forest (Southeastern Brazil). The population dynamics was studied for 1 year to examine the efficacy of the selected method and to evaluate if the population is stable. Later, the effect of periodical removal of animals on the population size was tested. The method of population estimation used in this study proved to be very effective. We recommend using it to monitor invasive populations of P. clarkii. The population size varied discretely over the year with variable but low growth rate, indicating that the population is already established which introduce a notable threat to native species. The continuous removal of specimens proved to be inefficient since the growth rate was higher after the removal. One intensive removal event might be more effective than a continuous moderate removal as the one applied in this study. 相似文献