نتایج جستجو برای: clean and highly polluting

تعداد نتایج: 16861977  

2014

Regulations restricting ownership and the utilisation of private vehicles are on the rise to improve the efficiency and quality of transport systems worldwide. Rising levels of congestion, local air pollution and greenhouse gas (GHG) emissions drive decision makers to adopt strategic policies to restrict traffic. License plate lotteries, driving bans, and peak-hour driving restrictions are gain...

Journal: :Microbial Cell Factories 2004
Humberto Garcia-Arellano Miguel Alcalde Antonio Ballesteros

Industrial development may result in the increase of environmental risks. The enzymatic transformation of polluting compounds to less toxic or even innocuous products is an alternative to their complete removal. In this regard, a number of different redox enzymes are able to transform a wide variety of toxic pollutants, such as polynuclear aromatic hydrocarbons, phenols, azo dyes, heavy metals,...

Coal is a major source of energy. The available Indian coal quality is very poor having very high ash content and low calorific value. Indian coal generates a large quantity of ash as a by-product of combustion. The objectives of the present study were to reduce the ash content of coal to produce ultra-clean coal. The coal was treated wi...

Journal: :Journal of environmental quality 2013
Dongmei Xue Bernard De Baets Oswald Van Cleemput Carmel Hennessy Michael Berglund Pascal Boeckx

Apportionment of nitrate (NO) sources in surface water and classification of monitoring locations according to NO polluting activities may help implementation of water quality control measures. In this study, we (i) evaluated a Bayesian isotopic mixing model (stable isotope analysis in R [SIAR]) for NO source apportionment using 2 yr of δN-NO and δO-NO data from 29 locations within river basins...

Journal: :iranian journal of catalysis 2015
najme kalvari janaki razieh fazaeli hamid aliyan

a series of fe3o4 supported on mesoporous fdu-12 silica systems were prepared by the hydrothermal conditions. the surface properties of the functionalized catalyst were analyzed by a series of characterization techniques like ftir, xrd, n2 adsorption–desorption and tem. xrd and adsorption–desorption analysis shows that the mesostructure of fdu silica remains intact after fe3o4 modifications, wh...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان 1389

wireless sensor networks (wsns) are one of the most interesting consequences of innovations in different areas of technology including wireless and mobile communications, networking, and sensor design. these networks are considered as a class of wireless networks which are constructed by a set of sensors. a large number of applications have been proposed for wsns. besides having numerous applic...

2015
Christopher G. Boone Michail Fragkias Geoffrey L. Buckley

Purpose: This study examines the density of polluting industry by neighborhoods in Baltimore over the long term, from 1950 to 2010, to determine if high pollution burdens correspond spatially with expected demographic and housing variables predicted in the environmental justice literature. For 1960–1980 we use data on heavy industry from Dun and Bradstreet directories and for 1990–2010 the US E...

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