Search results for " Pollution"
showing 10 items of 1010 documents
Parasite communities in the red mullet, Mullus barbatus L., respond to small-scale variation in the levels of polychlorinated biphenyls in the Wester…
2012
We examined parasite populations and communities in the Mediterranean sentinel fish species, Mullus barbatus, sampled at a small-scale PCB gradient at the shelf sediments off Catalonian coasts of the Western Mediterranean. A recurrent feature at both the population and community level was the differentiation of the samples along the increasing PCB levels simultaneously registered in the sediments. Both directly transmitted ectoparasites and endoparasites with complex life-cycles transmitted via food chains exhibited a decrease in abundance with the increase in PCB levels. Parasite numerical responses translated into significant differences in infracommunity structure with decreasing predict…
Solid-phase extraction in multi-residue pesticide analysis of water
1993
The determination of pesticides in water is fundamental to the solution of environmental problems as natural waters are usually contaminated with a large number of pesticides. The selection of an isolation and/or concentration technique depends largely on the class of pesticides to be determined. It is often necessary to determine simultaneously a wide variety of compounds in a water sample. Application of solid-phase extraction techniques offers a solution. The mechanisms of solid-phase extraction, types of sorbents and their application to multi-residue pesticide analysis are reviewed.
Application of DPSIR framework to analyze the groundwater pollution threats of municipal solid waste: Case study Médiouna Landfill, Morocco
2021
This study addresses the issue of groundwater resources quality affected by solid waste disposed of in the Médiouna dumping site. In this order, we applied the Driving forcePressureStateImpact Response model (DPSIR) model combined with external factors of SWOT analysis (Opportunities and Threats) to assess the environmental impact of waste from Médiouna landfill on groundwater. The analysis study revealed that the continuous demographic expansion and economic growth made solid waste a complex problem. The study highlights the urgent need for implementing new strategies and redesigning more effective, operational and realizable management projects to rehabilitate the Médiouna landfill. In ad…
Road Traffic Pollution and Childhood Leukemia: A Nationwide Case-control Study in Italy
2016
Background The association of childhood leukemia with traffic pollution was considered in a number of studies from 1989 onwards, with results not entirely consistent and little information regarding subtypes. Aim of the study We used the data of the Italian SETIL case-control on childhood leukemia to explore the risk by leukemia subtypes associated to exposure to vehicular traffic. Methods We included in the analyses 648 cases of childhood leukemia (565 Acute lymphoblastic–ALL and 80 Acute non lymphoblastic-AnLL) and 980 controls. Information on traffic exposure was collected from questionnaire interviews and from the geocoding of house addresses, for all periods of life of the children. Re…
Effect of in vitro exposure to cadmiumand copper on sea bass blood cells
2009
Blood cells freshly collected from sea bass (Dicentrarchus labrax) were exposed in vitro to different concentrations of cadmium (Cd) and copper (Cu) at 10-7 M, 10-5 M, 10-3 M, and exam- ined for neutral red retention capacity and for cell vitality with MTT assay. A relationship between heavy metal exposure and alteration in responses of blood cells in a dose-time-dependent was found. Our results showed that fish blood cells may constitute an interesting biological model for experimen- tal and applied toxicology, especially in the case of environmental pollution.
Anthropogenic noise: the behavioural responses of Sparus aurata juveniles as the basis for a numerical model.
2019
Underwater noise is mainly produced by anthropogenic activities and has increased in recent years. The Marine Strategy Framework Directive aims to monitor “continuous low frequency sound” trends in ambient noise in particular at 1/3rd octave bands centered at 63 and 125 Hz. The aim of this work is to evaluate the possibility of using the results of Sparus aurata juvenile’s behavior for parameterizing a numerical model of the fish behavior. The fishes were stressed with white noise filtered with a band pass filter at 1/3 octave band centered respectively at 63 Hz, 125 Hz, 500 Hz, and 1 kHz (SPL: 140-150 dB re 1µPa). We performed three test replicas for the control (without any sound emission…
Setting up of a technical economic index of priority scales for urban noise control
2005
Correct application of the criteria contained in rules and/or recommendations allows verifying the exposure standards and provides technical directions for actions of protection along acoustically similar areas. Taking into account the compulsory value of the rule and the budget demands, in relation to the complexity of the concerned environmental system (noise sources, physical configuration, exposed people, etc.), an effective implementation of noise control measures can benefit by a procedure for fixing the optimum sequence. This paper we first analyse some priority criteria proposed by some of the authors. A further tool is available using the TEI Technical Economic Index, by the author…
Noise in a hospital area. Measure and evaluation
2005
The territory of Sciacca has been acoustically subdivided into homogeneous areas by the authors. In the present job, our attention is focused on the zones in class I that includes particularly sensitive areas as schools and hospitals. The acoustic climate inside and outside the hospital of Sciacca is carried out. The hospital was built on a hillock. Around the hillock two roads, an urban and a main highway are present, both with high traffic. With a campaign of measures, in proximity of the roads, in the hospital square, in the parking, and finally inside the hospital, the equivalent level and the patients exposure was calculated as Ld, Ln and DNL. Both the impact due to the roads (consider…
Statistical modelling of non-stationary processes of atmospheric pollution from natural sources: example of birch pollen
2016
Abstract A statistical model for predicting daily mean pollen concentrations during the flowering season is constructed and its parameterization and application to birch pollen in Riga (Latvia) are discussed. The model involves several steps of transformations of both meteorological data and pollen observations, aiming at a normally distributed homogeneous stationary dataset with linearized dependencies between the transformed meteorological predictors and pollen concentrations. The data transformation includes normalization of daily mean birch pollen concentrations, a switch of the independent axis from time to heat sum, a projection of governing parameters to pollen concentrations, and a …
Opportunities and challenges of the opening of the Arctic Ocean for Norway
2020
Abstract This chapter analyzes the potential opportunities and challenges associated with the opening of the Arctic Ocean for Norway. Climate change in the Arctic is opening up access to sea routes of the Arctic region, and this could boost trade and consequently result in a sharp increase in shipping traffic in Norway. Specifically, Northern Norway would become a focal point for port- and shipping-related activities. However, these opportunities can only be fully utilized if the various stakeholders involved are able to manage the challenges of the opening of the Arctic Ocean. Like opportunities, challenges also cover a range of spheres, including environmental pollution, ecological damage…