Khoramnejadian S.,Islamic Azad University at Damavand |
Zavareh J.J.,Alborz province |
Khoramnejadian S.,Islamic Azad University at Tehran
Procedia Engineering | Year: 2011
There are many ways to reduce plastic waste in the environment. Bio-based plastic could be a best solution for sustainable environment. In this article bio-based plastic were prepared. Potato starch and corn starch as a biopolymer blending with polyethylene. Samples buried into soil for eight months and put in aerated sludge tank for 2 month. Weights lose of sampled after removing from degradation environment indicates a biodegradation rate. FTIR spectra before and after exposure to aerated sludge was done, Through FTIR spectroscopy, the biodegradability rate and reduction in some of the existing bonds in polymer before and after placing the samples inside aerated sludge tank is exhibited and the consumption of polymer by microorganisms is also revealed. Compare SEM before and after soil burial confirm biodegradability of compounds in the natural environment because polymer matrix consume by soil microorganisms. © 2011 Published by Elsevier Ltd.
Dastgoshadeh F.,Alborz Province |
Tooni O.,Alborz Province |
Sheikhjan S.M.,Alborz Province |
Taghinejad G.,Alborz Province |
And 2 more authors.
Journal of Environmental Studies | Year: 2014
Air pollution is today a major problem for modern societies. It has long been recognized as a potentially lethal form of pollution. Increasing pollution levels due to rapid urbanization and growth in emission related to vehicular transportation are now caused major concern. The mobilization of heavy metals into the biosphere by human activities has become an important process in the geochemical recycling of these metals. Pollution of the natural environment by heavy metals is a worldwide problem because these metals are indestructible and most of them have toxic effects on living organisms. While some of these elements are essential for humans, at high levels they can also mean toxicological risks. According to numerous studies, the pollution sources of heavy metals in environment are mainly derived from anthropogenic sources. In urban soils and urban road dusts, the anthropogenic sources of heavy metals include traffic emission (vehicle exhaust particles, tire wear particles, weathered street surface particles, brake lining wear particles), industrial emission (power plants, coal combustion, metallurgical industry, auto repair shop, chemical plant, and etc.), domestic emission, weathering of building and pavement surface, atmospheric deposited and so on.