Technology has improved human quality of life but it caused several impacts also, due to the various contaminants released in the environment. Among these contaminants, mercury is a major concern because of its high toxicity and ubiquity in the biosphere, being classified as a global pollutant. It can occur in different forms (i.e. soluble, gaseous or solid) and chemical species (e.g. Methylmer...

Since the U.S. Environmental Protection Agency (EPA) regulatory determination in 2000 that it intended to regulate emissions from coalfired power plants, many utilities have stepped up proactive steps to investigate methods to control and reduce emissions. However, a lack of sound data still exists which documents the effect of selective catalytic reduction (SCR), selective noncatalytic reducti...

Mercury naturally occurs in gas and oil deposits a wide range of concentrations covering six orders magnitude: up to 5 mg/m 3 natural 600 ppm (mg/kg) crude oil. hydrocarbons poses number technological environmental problems: contamination equipment products with this extremely toxic element, poisoning catalysts, initiates intensive corrosion equipment, thereby enhancing accident risk. Metal mer...

Abstract Plants are mainly made up of water, which constitutes between 80 and 90% their weight. Moisture factor comes across as one the most important in tobacco products. Rapid determination moisture content products at necessity any management plants (before after production). Therefore, concern has been raised this study to evaluate four kinds combustible using gravimetric method. In additio...

The state of the art of analytical procedures based on solid-phase microextraction (SPME) and its applications to tin, mercury, arsenic, antimony, chromium, selenium, and lead determination in abiotic and biotic matrixes are critically reviewed from 1994 to present. First, sample pretreatment prior to SPME is evaluated, including a description of the most usual leaching procedures for sediment,...