Discutindo a educação ambiental no cotidiano escolar: desenvolvimento de projetos na escola formação inicial e continuada de professores

A presente pesquisa buscou discutir como a Educação Ambiental (EA) vem sendo trabalhada, no Ensino Fundamental e como os docentes desta escola compreendem e vem inserindo a EA no cotidiano escolar., em uma escola estadual do município de Tangará da Serra/MT, Brasil. Para tanto, realizou-se entrevistas com os professores que fazem parte de um projeto interdisciplinar de EA na escola pesquisada. Verificou-se que o projeto da escola não vem conseguindo alcançar os objetivos propostos por: desconhecimento do mesmo, pelos professores; formação deficiente dos professores, não entendimento da EA como processo de ensino-aprendizagem, falta de recursos didáticos, planejamento inadequado das atividades. A partir dessa constatação, procurou-se debater a impossibilidade de tratar do tema fora do trabalho interdisciplinar, bem como, e principalmente, a importância de um estudo mais aprofundado de EA, vinculando teoria e prática, tanto na formação docente, como em projetos escolares, a fim de fugir do tradicional vínculo “EA e ecologia, lixo e horta”.Facultad de Humanidades y Ciencias de la Educació

Applications du couplage torche à plasma/spectrométrie de masse à la recherche d'éléments traces en eau potable et dans des saumures

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Uncertainties of the frequency response of wet microphone windscreens

During outdoor measurements, specific windscreens are often used to prevent rain water to penetrate into the microphone and to damage its components, but some water can nevertheless remain in the foam of the windscreen. This paper presents an extensive experimental study of the influence of water in the foam of a windscreen on its frequency response. It is concluded that the presence of water inside a windscreen can significantly change the sensitivity of the system only for rain amount higher than 1 mm and for frequency above 1 kHz. Some disparities can be found between the different types of windscreens. Bias correction values, together with uncertainty estimations are given for different types of windscreens and an estimation of the duration during which correction and uncertainty must be applied is also proposed for several types of common windscreens

Relationship Between Industrial Discharges and Contamination of Raw Water Resources by Perfluorinated Compounds: Part II: Case Study of a Fluorotelomer Polymer Manufacturing Plant

International audienceIn this study, the concentrations of 10 perfluorinated compounds (PFCs) were measured in effluents of a fluorotelomer polymer manufacturing plant and its wastewater treatment plant. A 50-fold increase between the two effluents mass flows was observed. The water quality of two drinking water treatment plants located downstream at 15 and 25 km from the manufacturing plant was examined. An increase of the sum of PFCs was observed between the river (30 ng/L) and an alluvial well (70 ng/L), and between the raw water (9 ng/L) and the outlet of a biological treatment (97 ng/L). These results indicate a possible degradation of fluorotelomers, occurring during wastewater treatment, sediment infiltration in the alluvial aquifer, and drinking water treatment

Boron removal from drinking water with a boron selective resin: is the treatment really selective?

International audienc

National screening study investigating nine phthalates and one adipate in raw and treated tap water in France

International audienceThe goal of this study was to determine the potential exposure of much of the French population to nine phthalates and bis (2-ethylhexyl) adipate (DEHA) due to water consumption. The occurrence of these compounds was investigated in raw and treated water from public water systems. Water samples were collected in one sampling campaign equally distributed across 101 French départements (a French administrative unit) from November 2015 to July 2016. In all, 271 raw water samples and 283 treated water samples were collected. A specific sampling protocol was conducted in order to assess phthalate pollution during sampling and analysis, and to produce reliable results. Field blanks were thus collected at the same time as real samples at each sampling point. The contamination detected in field blanks was due to diethyl phthalate (DEP), dibutyl phthalate (DBP), diisobutyl phthalate (DIBP), and di-2-ethylhexyl phthalate (DEHP), which are common phthalate interferences in blanks. Their concentrations were never ten times higher than the limits of quantification (LOQ). In tap water, the most frequently detected compound was DBP, at a maximum concentration of 1300 ng/L. In raw water, however, DEP was the most frequently detected analyte with concentrations ranging from 255 to 406 ng/L, while DIBP was observed at a maximum concentration of 1650 ng/L. It is worth mentioning that DEHP-the most widely used phthalate-was only detected in one sample of raw water. Phthalates are not concentrated in any particular area of France in either raw or treated water

Observatoire du bruit ferroviaire en Ile de France – un outil de suivi de l’évolution du bruit dans le temps à partir d’une analyse fine des mesures acoustiques

Dans le cadre de la mise en service du Grand Projet Ferroviaire Seine Normandie, un observatoire du bruit a été mis en place pour suivre la montée en charge des circulations de fret ferroviaire, ainsi que l’évolution du bruit dans le temps. Le monitorage acoustique est assuré par deux stations de mesure permanente, une analyse des indicateurs classiques d’exposition au bruit LAeq,6-22h et LAeq,22-6h est réalisée, complétée par une analyse de plusieurs autres indicateurs événementiels, en distinguant les différentes familles de circulation (Fret, TER, Transilien). Par ailleurs, le règlement européen UE 2019/774 relatif à l’application de la STI Bruit - wagons de marchandises existants impose à compter du 8/12/2024 des circulations de trains fret moins bruyants sur certains itinéraires appelés "Quieter routes". Le bénéfice attendu ne se limitera pas aux riverains de ces itinéraires mais permettra, par effet indirect un gain acoustique progressif sur l’ensemble des axes de fret ferroviaire français, lié à la modernisation ou au remplacement du parc de matériel en cours. L’observatoire du bruit a aussi comme finalité de quantifier les gains acoustiques apportés par les effets indirects de cette nouvelle réglementation