Navegando por CNPq "CNPQ::ENGENHARIAS::ENGENHARIA SANITARIA::SANEAMENTO AMBIENTAL::QUALIDADE DO AR, DAS AGUAS E DO SOLO"

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Acesso aberto (Open Access)
Análise da contaminação e distribuição espacial de metais pesados em áreas de influência de mineração em um estuário tropical na Amazônia
(Universidade Federal do Pará, 2024-02-19) SILVA, Matheus Cavalcante; MONTE, Christiane do Nascimento; http://lattes.cnpq.br/6178162183692365; ISHIHARA, Júnior Hiroyuki; http://lattes.cnpq.br/3498874642887006; https://orcid.org/0000-0002-0081-7913
Tropical estuaries are often impacted by heavy metals, but the spatial distribution and contamination of these pollutants have been insufficiently investigated between sediments and water in South America, especially in the little-studied regions of the Amazon. In order to contribute to this gap, this study investigated the spatial distribution and contamination of heavy metals (Cd, Cu, Fe, Mn and Zn) in the surface waters and sediments of the Pará River Estuary (PRE) (Pará, Brazil), which has been affected by various mining activities. Thus, different procedures were integrated, including a systematic review of the literature on tailings spill events and impacts derived from these events, sedimentary and mineralogical characterization, estimation of organic matter in the sediment, physical-chemical parameters of the water, determination of metals in the sediment and water, contamination assessment indices and statistical analyses. The results showed that the kaolin tailings storage systems in Barcarena-PA are more unsafe than the alternative disposal systems reported in the literature, resulting in kaolin tailings leaking into regional water bodies and spreading areas used for bathing. On the other hand, the disposal of bauxite tailings in the area prioritizes alternative systems with higher solids content, facilitating control actions. In addition, the bauxite and kaolin tailings had predominantly silty fractions and mineralogy marked by the presence of aluminum hydroxides. All the samples showed low concentrations of heavy metals in the sediments, suggesting the action of resuspension in an area with predominantly sandy sediments. As an exception, Cd showed high concentrations in Murucupi and Furo do Arrozal, which triggered high levels of contamination in these areas. All the sampling sites indicated that there was a high concentration of heavy metals and a high degree of contamination of the water, except in the vicinity of Vila do Conde. Furthermore, high ecological risks are associated with the metals present in the water from anthropogenic activities, compromising the quality of the estuarine ecosystem.
Acesso aberto (Open Access)
Análise da produção de lodo de esgoto e da capacidade de disposição do aterro sanitário do Aurá na região metropolitana de Belém para os próximos 20 anos
(Universidade Federal do Pará, 2009-07-01) CUNHA, Débora Suely Anjos; PEREIRA, José Almir Rodrigues; http://lattes.cnpq.br/9918600634569244
Belém Metropolitan Region has few and incomplete informations about production and destination of sewage sludge, because just little part of the sludge generated in septic tank and collective Sewage Works is throwed away without control in Aurá Sanitary Landfill. Because of this, is usual to throw the sludge in water bodies and in the ground, worsen the problems of pollution/contamination in the urban areas. Therefore, this work has the objective of analyzing the increase of production of sludge and evaluate the impact in the Aurá Sanitary Landfill. The search was developed in Belém Metropolitan Region, composed by Belém, Ananindeua, Benevides, Marituba and Santa Bárbara do Pará. It was divided in 2 stages. In the first stage it was estimated the production of the sludge (brute and drained) of septic tanks and in the collective Sewage Works during 2009 to 2030, and the second one was the availability of an area to disposal in the Aurá Sanitary Landfill. In the period studied, it was verified that by the way of the increase of the content of sludge drainage doesn’t has too many impact in the content of the residence solid waste, the deficiency of the available areas in the Aurá Sanitary Landfill is a problem that has to be solved as soon as possible, otherwise residence solid waste and sewage sludge produced in Belém Metopolitan Region won’t be well disposal, as a matter of fact that the prevision is the fast implicate of the free content of Aurá Sanitary Landfill.
Acesso aberto (Open Access)
Avaliação da qualidade da água superficial do canal São Joaquim, Belém - PA
(Universidade Federal do Pará, 2016-03-15) PAREDES, Brenda Melise Morbach; FERNANDES, Lindemberg Lima; http://lattes.cnpq.br/4641468846318922
The process of urbanization and illegal occupation of urban channel margins nearby areas generate large impacts on these water bodies, the main one being the discharge of effluents. The channel São Joaquim, Belém Pa, is considered the largest urban channel Bethlehem, and already suffers from such impacts, as well as being affected by the lack of sanitation in its Sub Basin, such a situation can be observed in the results obtained in 12 months sampling over three points from its source to its mouth. This study aimed to analyze the said water quality Canal in physical, chemical and biological parameters through the IQA and application of descriptive statistics, analytical and multivariate analysis, being possible to observe the degradation of this water body caused mainly by organic matter, which was obtained through the OD analysis, BOD, total nitrogen, total phosphorus, and thermotolerant coliforms. The Water Quality Index was calculated for the Channel and was obtained the value of 49 classifying it as quality "acceptable." When performing a seasonal comparison between dry periods and wet, and tide conditions, using the Mann Whitney hypothesis tests and test T Student, it was observed that there was significant variability between the variables, except for the temperature, which It showed a variation between the dry and rainy seasons. The analysis of variance (ANOVA) was applied for the verification of similarity between the points for each variable analisada.Ao perform a temporal assessment of water quality of the channel between the years 1988; 2002; 2005; 2006; 2011 and 2014, it was observed that the degradation of the channel has a history of nearly 30 years, a situation confirmed by the analysis of indicator variables of organic matter. The principal component analysis led to the formation of three components that together represented 67.53% of the variability of the data, and these variables explained by the ACP, anthropic action indicative.
Acesso aberto (Open Access)
Correlação entre índice de qualidade da água e usos múltiplos na bacia hidrográfica do igarapé da Prata, Capitão Poço/PA
(Universidade Federal do Pará, 2018-02-06) RODRIGUES, Rodrigo Silvano Silva; FERNANDES, Lindemberg Lima; http://lattes.cnpq.br/4641468846318922
Water quality indicators are important tools for the summary and generation of solid foundations about water resources degradation. The Water Quality Index of the Environmental Company of the State of São Paulo (WQI-CETESB) is the main water quality index used in Brazil. In relation between water quality and degradation in drainage basins, it is common to associate multiple uses of soil and water. This research correlates the WQI-CETESB to multiple uses of water and soil at three collection sites in the Prata catchment, located in the municipality of Capitão Poço / PA, about 154 km east of Belém / PA. It is a rural area in northeast Pará with intense agricultural activities. It was carried out eighteen campaigns with twenty-three collections, being that are twelve ones in the rainy season and eleven ones in the less rainy season. The index was calculated from the analysis of its nine parameters: turbidity, dissolved oxygen (DO), biochemical oxygen demand (BOD), total nitrogen, total phosphorus, total solids, pH, temperature and thermotolerant coliforms. The descriptive statistics was applied to synthesize the obtained data. The morphometry of the drainage areas of the collection sites was analyzed in order to understand the influence of these physical characteristics on the water quantity and quality. Soil use and coverage were mapped using georeferencing tools. The association between WQI-CETESB results and multiple uses was verified by checking the variables with the greatest influence on the value obtained for the index. Based on the WQI-CETESB, the water quality in the Prata catchment ranges between the categories Fair and Good. The values obtained in the majority did not present significant variations for the different periods (rainy and less rainy). The descriptive statistics proved to be efficient for the analysis of the results obtained from WQI-CETESB. The morphometric analysis of the drainage areas showed that the shape and the topography are not factors that impact the water quantity and quality in the catchment. The mapping of soil use and coverage and activities related to multiple uses of water, showed to be efficient as an aid in the visualization of local dynamics. The variables that most influenced the results were thermotolerant coliforms, pH, DO, BOD and total phosphorus, with representativeness associated to the three collection sites studied. The main sources of pollution raised by the mapping are strongly related to the results obtained. Targets for quality improvement and mitigation measures should be established with the aim of reducing local water degradation.
Acesso aberto (Open Access)
Implementação de modelos computacionais na predição temporal e espaço-temporal de parâmetros de qualidade de água
(Universidade Federal do Pará, 2021-12-14) ALMEIDA, Anderson Francisco de Sousa; MERLIN, Bruno; http://lattes.cnpq.br/7336467549495208; HTTPS://ORCID.ORG/0000-0001-7327-9960; GONZÁLEZ, Marcos Tulio Amaris; http://lattes.cnpq.br/9970287865377659
The quality of water is directy related to is level of pollution caused by anthropic and industrial actions, with a consequent reduction in the availability of quality water. Therefore, limological monitorig of the basic parameters os water quality is carried out, as away of obtaining data that guide the decision-making of water resouces management bodies. In this context, the present study has the implementation of machine learning algorithms to predict temporal and spatiotemporal water quality parameter data. The ML techniques used were linear regression, ramdom forest, MLP and LSTM neural networks. Two collection points from a Water Resources Management Unit in São Paulo, Brazil were used. Models are evaluated using MAPE( mean absolute percentage eror) and RMSE( root mean squared erro) metrics. Therefore, in temporal prediction, the LSTM technique presented the best performace in relation to the other techniques and the data used, as it has the lowest average RMSE result, with 2.47. However, in spatiotemporal prediction, MLP has the best performace both in relation to the other techniques and the data used , as it has the lowest averagee results of MAPE and RMSE, respectively, 5.94% and 1.34. Thus, these performaces of neural networks can be justified by the non-linearity of the parameter data. Other than that, the results of the experiments aim to contribute to the water quality monitorng process and assist in the planning of water management, so that it meets current legislation and enales the indication of public policies, through machine learning models in prediction of water quality parametes.
Acesso aberto (Open Access)
Índices de qualidade das águas subterrâneas de abastecimento público da Ilha do Mosqueiro, município de Belém - PA
(Universidade Federal do Pará, 2015-02-09) LOPES, Raynner Menezes; SANTOS, Maria de Lourdes Souza; http://lattes.cnpq.br/1604134738302499
Acesso aberto (Open Access)
Obtenção do IQA para avaliação da qualidade da água em rios dos municípios de Abaetetuba e Barcarena (PA)
(Universidade Federal do Pará, 2012) MEDEIROS, Adaelson Campelo; MENDONÇA, Neyson Martins; http://lattes.cnpq.br/7534816053779593
This study was aimed at assessing the quality of the waters of two rivers called Amazon Arapiranga Murucupi and the municipalities of Abaetetuba and Barcarena respectively, in the State of Pará. For this evaluation, was used as the main tool of the Water Quality Index (WQI) calculated from nine (09) variables. The WQI calculations were performed according to the criteria of SP-CETESB adapted National Sanitation Foundation, USA. This study was conducted in 2009 and included four sampling campaigns involving trimentrais the rainy season and dry, and variables in certain conditions of tide low tide and high tide. From the data of variables and WQIs determined, it was possible to make some comparisons on the quality of the rivers studied and it was applied on these data, descriptive statistics, analytical and multivariate. Descriptive statistics were determined during the rainy season and dry values of mean, standard deviation, minimum and maximum values and coefficient of variation. To verify the significance level and sample distribution of the data generated, was held from the statistical analytical tests of normality and hypotheses respectively, comparing the data of variables and WQIs in the rainy season and dry. The multivariate analysis provided a better assessment of water quality of these two rivers through the analysis of groups. The river conditions presented Arapiranga regular and good quality, recording average values of the rainy season WQIs 48 ± 3.7 and 51 ± 5.6 in the ebb-tide and high tide respectively during the dry season, these values were 48 ± 4.6 (low tide and high) and 55 ± 5.7 (low tide and high). From the values of certain WQIs Murucupi the river, we observed conditions of poor quality, regular and good in those waters, and the average values during the rainy season were 44 ± 9.4 and 51 ± 10.3 (low tide and high), in the dry period, these values were 51 ± 8.3 at low tide and 52 ± 8.6 at high tide.The assessment tools used in this study provided a good view on the quality of water in both rivers, observing in general, that there were differences signifitiva quality for these waters with respect to the comparison between the rainy and dry. It is noticed that the river located in Barcarena / PA, undergoes major anthropogenic influence due to the largest urban area in its vicinity, as in other river in the city of Abaetetuba / PA, this influence is less.
Acesso aberto (Open Access)
Risco tecnológico: uma análise do porto de Vila do Conde como área potencial de ameaça ao vazamento de óleo para comunidades em situação de vulnerabilidade
(Universidade Federal do Pará, 2008) RODRIGUES, José Edilson Cardoso; SZLAFSZTEIN, Cláudio Fabian; http://lattes.cnpq.br/1348005678649555
The present work was accomplished at Conde’s Village, municipal district of Barcarena in Pará State, with objective of studying the technological hazards related to the oil leak, aiming the real menace situations and the vulnerability of the local population. The methodology based on three stages: bibliographical rising on the concept of technological risk; field work for the Identification and characterization of the menace areas in the port zone and of the area of vulnerability in Conde's Village through technical visits, interviews, application of questionnaires, observations and photographic registrations; and finally cartographic rising and use of satellite images IKONOS for delimitation of the menace areas in the port, setorization of Conde's Village and for the making of thematic maps. In the port zone of Conde's Village we identified as main menace areas to the leak: moorings area, where the leant against practice, load, discharge and provisioning of ships and rafts with combustible oil are constant, presenting menace level that is going of a lot the extremely probable of happening; Access area, defined by the bridge through where it travels the pipeline, presenting menace level as probable of happening leak and the stock area, where it concentrates the storage tanks and platforms of provisioning presenting menace level that is going of the probable to very probable of happening leak. In Conde's Village the social vulnerability pointed that the population of the section river, in most fishermen, it presents larger vulnerability degree, proceeded by the inhabitants of the section beach, as owners of huts, that present medium vulnerability degree, and with low vulnerability degree they are the inhabitants of the section firm earth. Therefore, a casualty with oil will cart a reaction that it is angered to diffuse at the whole Villa, interrupting the main change flows between the groups and its respective activities.
Acesso aberto (Open Access)
Simulação da dispersão de poluentes atmosféricos e avaliação da qualidade do ar na área de abrangência do Distrito Industrial de Barcarena-PA
(Universidade Federal do Pará, 2012-04-30) ARAÚJO, Ivan Roberto Santos; ROCHA, Edson José Paulino da; http://lattes.cnpq.br/2313369423727020
The atmospheric pollution is considered, nowadays, one of the biggest problems of the contemporaneous society, turning into a menace to its life quality, because generates negative impacts in the natural and anthropogenic environment. In the range of the forms to control atmospheric pollution originated by settled sources, come forth the emission dilution in the atmosphere due to dispersal effects, the adoption of control equipments before the casting of gases or the relocation of the source, cause it seems to be a suggested form during the environmental licensing process enterprises with potential air pollution. Currently computer models of dispersion of atmospheric pollutants are being largely used on the simulation of concentration of pollutants, objecting to help environmental agencies in the prognostic of air quality or to supply deficiencies of atmospheric emissions monitoring. The present research studies the air quality e evaluates the atmospheric pollutants dispersal over Vila do Conde and influence areas of the industrial district of Barcarena, state of Para, with the help of the AERMOD View model, considering the possibility of establishment of a relation between the levels of pollutants emissions in the source, with the concentration of them in the air and identify critical points of pollution as well. The Air Quality Index – IQA and the fragility of the population over the affected areas by the atmospheric pollutants were also measured in the research. The methodology used allowed to measure the mean concentration of atmospheric pollutants during a defined time of modeling and also information about the reaching of the pollutants plume were acquired. Information concerning the relation between the peak and the mean values of concentration in the receptive areas provoked by enterprises that have operational characteristics similar to the modeled are showed too. The results show that the influence of the meteorological parameters in the dispersion of pollutants are indispensable and determinants in the impact on the air quality prevision and also in the land use planning of areas that have atmospheric polluting activities.