نتایج جستجو برای: pollution indices
تعداد نتایج: 151712 فیلتر نتایج به سال:
examined the cardiac autonomic response to daily variations in PM in 26 elderly (mean age 81) individuals for 3 consecutive weeks. Several standardized methods were used to measure 24-hr average PM concentrations prior to the clinical test inside (indoor PM2.5) and immediately outside (outdoor PM2.5 and PM2.5-10) of participants' residences. Resting, supine, 6-min R wave to R wave (R-R) interva...
Total metals concentrations, Geoaccumulation index (Igeo), Pollution load index (PLI), degree of contamination (DC) and sediment quality guidelines (SQGs) were used to assess heavy metals contamination status and ecological risk in the sediments from the Libyan Mediterranean coast. The distribution pattern of heavy metals in the sediment follows the sequence: Fe>Pb>Mn>Ni>Zn>Cr>Cu>Co>Cd. Over th...
An attempt has been made in this present work, to study the seasonal variations of water quality of River Godavari for the period of 2004-2012 at Rajahmundry and Dhawaleswaram located on the banks of River Godavari in Andhra Pradesh. This water quality modelling is done with the help of Water Quality Indices (WQI) computed using NSFWQI and WAIWQI methods. Multivariate statistical techniques nam...
In the paper a Nonlinear Set Membership (NSM) prediction method is applied to forecast tropospheric pollution. The NSM method does not require the choice of the functional form of the model used for prediction but only assumes a regularity condition on the regression function defining the model. In this way, the complexity/accuracy problems deriving from the proper choice of a suitable parametr...
This paper takes the eastern China as an example, the relationship between environmental pollution and economic development is analyzed, and then the breakthroughs in the development path of EKC turning point are sought. Furthermore, the paper uses the environmental data of the eastern China from 1996 to 2007, with GDP per capita as an economic development index, and with volume of industrial w...
The River Luzou flows through a sandy substrate in the South West of France. According to the results of two assessment surveys, the Water Agency appraised that this river may not achieve the good ecological status by 2015 as required by the Water Framework Directive (2000/60/EC). This ecosystem is impacted by industrial effluents (organic matter, metals and aromatic compounds). In order to ass...
BACKGROUND Ambient air pollution has been consistently associated with exacerbation of respiratory diseases in schoolchildren, but the role of early exposure to traffic-related air pollution in the first occurrence of respiratory symptoms and asthma is not yet clear. METHODS We assessed the association between indexes of exposure to traffic-related air pollution during different periods of li...
River biomonitoring uses biotic indices that assess human-induced degradation, including pollution, by comparison with type-specific static biological reference conditions. However, index scores indicate pollution may reflect responses to natural hydrological variability associated low flows and drying, leading schemes misclassify sites as degraded. To address this, dynamic, site-specific adjus...
Introduction: Heavy metals (HMs) accumulated in the road dust may be transferred to the surrounding land and water bodies and pose ecological risks. Hence, such pollution should be considered, especially in coastal roads. This study focuses on the HMs pollution of dust settled on the surface of coastal roads along the Persian Gulf in Bandar Abbas city. Materials and Methods: In this study, ro...
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