Potability
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Moringa oleifera seed as a natural coagulant to treat low-turbidity water by in-line filtration
Resumo O objetivo deste estudo é avaliar o uso de semente de Moringa oleifera (MO) como um coagulante natural para remoção de turbidez e cor aparente no tratamento de água de abastecimento com baixa turbidez inicial via técnica de filtração direta em linha. A morfologia e carga de superfície foram investigadas por técnicas de caracterização como m
Rev. Ambient. Água. Publicado em: 25/11/2019
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2. Prà e PÃs-Tratamento por Eletro-OxidaÃÃo Associada à FotocatÃlise HeterogÃnea em uma ETA por FiltraÃÃo Direta Visando a ReduÃÃo dos Precursores dos Compostos Organoclorados / Pre and Post-Treatment by Electro-Oxidation Associated with Heterogeneous Photocatalysis on an ETA for direct filtration Aiming to Reduce Precursors of Organochlorine Compounds
This study evaluated the performance of the heterogeneous photocatalysis combined with electrooxidation compounding a hybrid photoreactor (contact time: 2.75; 5.5 and 11 min.) to pre-treat eutrophic water, comparing the use of chlorine (5 and 10 mg.L-1) and chlorine dioxide (1.2 mg.L-1), subjected to descending direct filtration (aluminum hydroxychloride at
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/10/2012
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3. Mobilidade de bário em solo tratado com sulfato de bário sob condição de oxidação e redução
In order to evaluate possible solubility of BaSO4 in soils under reducing conditions, column leaching assay was settled down, where the soil received three doses of BaSO4 (100, 300 and 3000 mg kg-1) at two humidities. After reaching an Eh of -200 mV rainfall of 200 mm per day-1 was simulated. The condition of reduction led to the increased levels of barium i
Química Nova. Publicado em: 2011-09
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4. Ocorrência de agrotóxicos em águas subterrâneas de áreas adjacentes a lavouras de arroz irrigado
The objective this study was to monitor pesticide residues in groundwater at three different times and in seven regions producing rice in southern Brazil, in the 2007/08 season. Imazethapyr and fipronil were found in all regions studied. All groundwater samples from the Planície Costeira Interna to Lagoa dos Patos and Santa Catarina contained at least one p
Química Nova. Publicado em: 2011
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5. QUALIDADE DA ÁGUA E SUA RELAÇÃO COM O USO DA TERRA EM DUAS PEQUENAS BACIAS HIDROGRÁFICAS / WATER QUALITY AND ITS RELATIONSHIP TO LAND USE IN TWO SMALL WATERSHEDS
A criação de assentamentos rurais em áreas de reforma agrária tem promovido maior inserção social para famílias que anteriormente estavam desprovidas da propriedade da terra e de fontes de renda. Entretanto, o parcelamento desordenado ou locação inadequada da infra-estrutura em locais historicamente explorados pode inviabilizar as atividades econôm
Publicado em: 2011
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6. Diagnóstico espaço-temporal da ocorrência de herbicidas nas águas superficiais e sedimentos do Rio Corumbataí e principais afluentes
Residues of herbicides from sugarcane were monitored in waters and sediments of Corumbataí River and tributaries. Ametryne, atrazine, simazine, hexazinone, glyphosate, and clomazone were detected in water samples, with negligible levels of ametryne and glyphosate in sediment samples. The area of recharge of the Guarani aquifer presented the highest triazine
Química Nova. Publicado em: 2007-10
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7. Teores de nitrato (NO3-) e amônio (NH4+) nas águas do aqüífero Barreiras nos bairros do Reduto, Nazaré e Umarizal - Belém/PA
This paper evaluates the occurrence of nitrate and ammonium in the Barreiras aquifer in the metropolitan area of Belém, Pará State, Brazil. The results show that some wells display ammonium and nitrate concentrations above or close to the limits of water potability regulations. The main cause of the pollution of these waters is related the local disposal o
Química Nova. Publicado em: 2007
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8. CONDIÃÃES AMBIENTAIS E CARACTERÃSTICAS DE POTABILIDADE DA ÃGUA DE BICAS DE USO PÃBLICO DA CIDADE DE TAUBATÃ-SP
Subterranean water is body water which can emerge by means of water fountains that are usually used for various activities by mankind. The objective of this study was to evaluate the potability standard of 12 water fountains in Taubatà city for human consumption. The parameters that were used for the evaluation were: bacteriological â counting of total col
Publicado em: 2006
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9. Situações de saneamento ambiental do turismo no espaço rural: estudo do caso da Rota Germânica
The rural area passed by a redefinition in agriculture and in the cattle-breeding sectors in the world and also in Brazil, configuring new activities and functions non-agricultural as the tourism. The several possibilities of tourism in the rural area help in the settlement of the man in the country, improve the life quality and the self-esteem besides contr
Publicado em: 2006
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10. Investigação ambiental em posto de abastecimento de combustiveis no municipio de Seropedica - RJ / Environmental survey of a Seropedica city gas station, Rio de Janeiro State, Brazil
Gas stations create a recognized potential threat of contamination to soil, groundwater and air. Brazilian environmental laws regulate the technical standards regarding the installation, equipaments and operation of gas stations in addition to requiring environrnental licenses. Accidents may expose the population to toxic and flammable substances. In Seropé
Publicado em: 2006
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11. QUALITATIVE ASPECTS OF GROUNDWATER AT UFSM CAMPUS, SANTA MARIA RS / ASPECTOS QUALITATIVOS DA ÁGUA SUBTERRÂNEA NO CAMPUS DA UFSM, SANTA MARIA - RS
Nowadays there is an expressive increase of the use of groundwaters because of the lower cost for treatment, distribution and, mainly the scarcity of hydrous resources. Over the years 40 tubular wells were drilled to supply provide about 17.000 people, who circulate at UFSM Campus, according to data given from University Cityhall, only 20 wells are working,
Publicado em: 2005
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12. Irrigação por infiltração com efluente de lagoa anaerobia em solo cultivado com milho (Zea mays L.)
The experiment was conducted around of a Sewage Treatment Plant located in Limeira city, São Paulo, Brazil. This research had the proposal to reuse the domestic effluent treated in an anaerobic lagoon, that present a BOD removal efficiency of 50%. The main objective was the determination of application rates of effluent in the soil according to sanitary and
Publicado em: 2004