Using mineral admixtures in cement composites as a way to improve their mechanical and sustainable environmental properties is a common practice in concrete technology. Among them nano-silica effectively influences the composite’s early and long-term properties. In this study, the effect of different percentages of TiO2 (0, 2.5 and 5 %) on self-cleaning properties and water […]
Score-based biotic indices are widely used to evaluate the water quality of streams and rivers. The main objective of this study was the assessmentof the water quality of Karoon River throught biotic indices based on the Family Biotic Index (HFBI), and the Biological Monitoring Working Party Score System (BMWP). Macroinveratabrate communities are one of the […]
Abstract The use of chemical fertilizers in agricultural sector leads to increase of nitrate concentrations in surface and groundwater. The present study determined the vast impacts of agriculture in Ardabil Plain in the northwest of Iran. The study surveyed and measured the amount of nitrate concentration in groundwater sources of 46 wells in the region. […]
Today, the quality of soil and water resources is affected by various pollutants. From the important chemical pollutants are heavy metals such as Arsenic. Arsenic is a metalloid that its unauthorized amounts in soil and ground water is a serious threat to human life .A mathematical and computer model of arsenic transport and transformation in […]
Among chemical industries, petroleum depots have been identified as large emitters of Volatile Organic Compounds (VOCs).They affect air quality and constitute serious health and environmental problems on the ecosystem. Air samples were collected over activated charcoal, using a low volume air sampler. The sampler was placed at a human breathing height of 1.5 m for […]
To investigate the pollutants of the Kor River, water samples were collected during the rice-growing season in 2014. The first fertilizer was diammonium phosphate ((NH4)2HPO4). After first irrigation, supplemented with fertilizer usage, in the upper layers of soil causes an increase of NO3− concentrations to reach from 7.3 to 25.7 mgl-1 at the agricultural lands […]
Particulate Matter (PM) is the primary culprit behind reduced air quality in urban areas. Although PM consists of various compounds, heavy metals are essential constituents because of their harmful effects on human health. The purpose of this study was to determine heavy metals concentrations in atmospheric PM10 in ambient air of Ahvaz, Iran. and also […]
Abstract: Emissions of volatile organic compounds (VOCs) are major causes of tropospheric ozone and aerosol pollutions. This research provided information on ozone formation potential (OFP) and toxicity potential (TP) resulting from VOCs emission from a Nigeria petroleum depot. In this work, speciated VOCs were provided on basis of updated emissions within and around the depot. […]
Pollution of water by heavy metals is a major problem such as mercury, lead, cadmium, cobalt, etc. The presence of toxic metals in the environment has detrimental effects on human and animal health and disrupts the balance and order of the ecosystem. Therefore, it is necessary to study the ways to eliminate these pollutants. The […]
Nanoparticles (NPs) are causing threats to the environment. In this review, we examined how hematite (Fe2O3) and cobalt oxide (Co2O3) nanoparticles impact the species of freshwater green algae Chlorella vulgaris (C. vulgaris). We exposed laboratory cultures to five initial concentrations of nanoparticles and measured impacts on species in 24, 48, 72, 96, 120, and 144 […]
