The noise pollution produced by various aircraft systems, including hydraulic, pneumatic, electrical systems and auxiliary aircraft equipment inside the aircraft hangars, generally cause hearing impairment and mental disorder of shift and office personnel. Identifying hangar noise pollutants can lead to find solutions and methods to deal with the contaminants in the aviation industry. In the […]
Chitosan is one of the natural biopolymer. Despite its importance, the characterization and extraction processes of this essential biopolymer are yet enigmatic. In this study, we developed an analytical procedure for the extraction of chitin and chitosan from the aquatic beetles’ shells (Hydraenidae family). The commercial chitosan and isolated chitosan, obtained during our experiment were […]
Introduction & Discussion: Increasing knowledge about important factors of groundwater pollution caused due to anthropogenic activities i.e. human actions demands an understanding of the reality. Method: Hence, in this study, the researchers used factor analysis or principal component analysis to identify significant anthropogenic factors affecting the groundwater quality in two districts of West Bengal. Survey […]
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 […]
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 […]
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 […]
Due to population growth and increased production of municipal solid waste, it is important to utilize this unused energy source, With the right technology, this resource can be used as energy production. Sources of biomass include various natural and derived materials, such as woody and herbaceous species, solid wastes (e.g. from forest thinning and harvesting, […]
