Search results for " Pollution"
showing 10 items of 1010 documents
Urban environment and cognitive and motor function in children from four European birth cohorts
2021
[EN]Background: The urban environment may influence neurodevelopment from conception onwards, but there is no evaluation of the impact of multiple groups of exposures simultaneously. We investigated the association between early-life urban environment and cognitive and motor function in children. Methods: We used data from 5403 mother-child pairs from four population-based birth-cohorts (UK, France, Spain, and Greece). We estimated thirteen urban home exposures during pregnancy and childhood, including: built environment, natural spaces, and air pollution. Verbal, non-verbal, gross motor, and fine motor functions were assessed using validated tests at five years old. We ran adjusted multi-e…
Regional climate model simulations for Europe at 6 and 0.2 k BP: sensitivity to changes in anthropogenic deforestation
2014
International audience; This study aims to evaluate the direct effects of anthropogenic deforestation on simulated climate at two contrasting periods in the Holocene, ∼ 6 and ∼ 0.2 k BP in Eu-rope. We apply the Rossby Centre regional climate model RCA3, a regional climate model with 50 km spatial resolution, for both time periods, considering three alternative descriptions of the past vegetation: (i) potential natural vegetation (V) simulated by the dynamic vegetation model LPJ-GUESS, (ii) potential vegetation with anthro-pogenic land use (deforestation) from the HYDE3.1 (History Database of the Global Environment) scenario (V + H3.1), and (iii) potential vegetation with anthropogenic land …
Profiles and seasonal distribution of airborne fungi in indoor and outdoor environments at a French hospital
2009
International audience; A one-year prospective survey of fungal air contamination was conducted in outdoor air and inside two haematological units of a French hospital. Air was sampled with a portable Air System Impactor. During this period of survey, the mean viable fungal load was 122.1 cfu/m(3) in outdoor air samples, and 4.1 and 3.9 cfu/m(3) in samples from adult and pediatric haematology units, respectively. In outdoor samples, Cladosporium was the dominant genus (55%) while in the clinical units, Penicillium sp. (23 to 25%), Aspergillus sp. (15 to 23%) and Bjerkandera adusta (11 to 13%) were the most frequently recovered airborne fungi. The outdoor fungal load was far higher in autumn…
Trokšņa līmeņa novērtējums iekštelpās
2017
Bakalaura darba “Trokšņa līmeņa novērtējums iekštelpās” ietvaros veikti trokšņa līmeņa mērījumi daudzdzīvokļu māju dzīvojamās telpās dažādās Rīgas apkaimēs - Bolderājā, Vecrīgā un Maskavas forštatē. Novērtējums veikts izmantojot tiešo mērījumu metodi ar kalibrētu iekārtu PCE-322A. Iegūtie rezultāti apkopoti izvērtējot diennakts cikliskumu, mainību nedēļas laikā, ārējo faktoru ietekmi, kopā veiktas 8 mērījumu kampaņas. Iegūtie rezultāti liecina par normatīviem atbilstošu akustiskā trokšņa līmeni dzīvojāmo ēku telpās, kas nozīmē, ka tiek nodrošināta cilvēku aizsardzība pret akustiskā trokšņa nelabvēlīgo iedarbību.
Aerosolu piesārņojuma un trokšņa līmeņa novērtējums bērnu rotaļu laukumos Rīgas centrā
2019
Bakalaura darbā “Aerosolu piesārņojuma un trokšņa līmeņa novērtējums bērnu rotaļu laukumos Rīgas centrā” veikts piecu Rīgas centra bērnu laukumu cieto daļiņu gaisa piesārņojuma un trokšņa līmeņa izvērtējums 2019. gada pavasara periodā laika posmā no marta līdz maijam. Pētījuma ietvaros veikti mērījumi ar lāzera optisko daļiņu skaitītāju un trokšņa līmeņa mērierīci. Iegūtie rezultāti liecina, ka ar minētajiem aspektiem saistītā vides kvalitāte Rīgas bērnu laukumos ir apmierinoša, būtu jāstrādā ar trokšņa līmeņa samazināšanu. Atslēgas vārdi: bērnu laukumi, aerosolu gaisa piesārņojums, trokšņa līmenis.
The role of natural science collections in the biomonitoring of environmental contaminants in apex predators in support of the EU’s zero pollution am…
2022
Movalli, Paola et al.
A practical and user-friendly toxicity classification system with microbiotests for natural waters and wastewaters
2003
Various types of toxicity classification systems have been elaborated by scientists in different countries, with the aim of attributing a hazard score to polluted environments or toxic wastewaters or of ranking them in accordance with increasing levels of toxicity. All these systems are based on batteries of standard acute toxicity tests (several of them including chronic assays as well) and are therefore dependent on the culturing and maintenance of live stocks of test organisms. Most systems require performance of the bioassays on dilution series of the original samples, for subsequent calculation of L(E)C50 or threshold toxicity values. Given the complexity and costs of these toxicity me…
Photo-Electrochemical Technologies for Removing Organic Compounds in Wastewater
2018
Abstract In recent years, electrochemical technologies for the prevention and remediation of environmental pollution have been strongly developed. A review of photoelelectrocatalysis (PEC) for the treatment of wastewater is presented in this chapter. Different types of photo-anodes and cathodes have been developed and studied to increase the efficiency of PEC for the removal of organic compounds. An interesting parameter that was investigated in the last work is the generation of an active species by the utilization of proper cathodes. Moreover, this chapter deals with the keys factors affecting the PEC, including electrolyte oxidation.
International Legal Approaches to Waste Water Discharges. Opening speech
2002
En este discurso inaugural, realizo una introducción a la frustrante situación jurídica en la que se encuentran las descargas de aguas residuales a nivel internacional. Las descargas de aguas residuales son la mayor fuente de contaminación marina y, en consecuencia, ellas representan el mayor riesgo actual para la protección del medio ambiente marino. In this opening speech, I make an introduction to the disappointing legal situation of waste water discharges at international level. Waste water discharges is the main source of marine pollution and, therefore, they represent the major current risk to the protection of the marine environment.
Natural and artificial radioactivity levels in Livingston Island (Antarctic regions).
1994
Radioactive contamination of the sea and land is due, on the one hand, to fallout from atmospheric atomic explosions since 1945, and, on the other, to emissions produced by nuclear and radioactive facilities. Given its geographic position far distant from the aforementioned main sources of radioactive contamination, Antarctica should have the lowest levels that can be measured on the Earth of artificial radionuclides in the various receptor media which are characteristic of the trophic chain. In the case of Antarctica, these are melt-water, sea-water, mosses, algae, and lichens. With the aim of contributing basic information on the radiation levels present in the Antarctic ecosystem, we hav…