The determination of free Zn(2+) ion concentration is a key in the study of environmental systems like river water and soils, due to its impact on bioavailability and toxicity. AGNES (Absence of Gradients and Nernstian Equilibrium Stripping) and DMT (Donnan Membrane Technique) are emerging techniques suited for the determination of free heavy metal concentrations, especially in the case of Zn(2...

INTRODUCTION Enteric viruses, including Hepatitis E virus (HEV), are able to persist under environmental conditions and may cause public health problems by contaminating natural and drinking water resources. Routine procedures for monitoring viruses in water samples have not been established for the water microbiology screening panel. METHODOLOGY Eighty-six raw sewerage samples were collected...

The bactericidal action of sea water was measured as the difference in survival of cells of Escherichia coli in untreated and autoclaved portions of water samples. The beneficial effect of sterilization by heat on the survival of E. coli in sea water varied with season and was most marked during summer months, however, the magnitude of the effect differed greatly from sample to sample. The more...

an efficient protocol for the selective oxidation of primary alcohols to aldehydes withh5io6/v2o5 in ionic liquid [bmpy][pf6] has been developed. high yields of the products, mildreaction conditions and simple experimental procedure make this protocol complementary tothe existing methods. the catalyst can be reused for several times without obvious loss of thecatalytic activity.

A flow injection system is reported for the determination of fluoride based on its effects on the fluorescence intensity of Al-morin complex at pH 3.0 in ethanol-warn mixture. The effect of important parameters such as excitation and emission wavelengths, pH, reagents concenkations, flow rate of the carrier stream, sample injection volume, time of measurepent and interferences are reported. ...

The potential impacts of CO2 on freshwater aquifers outlined by Little and Jackson, 2010 appear, incorrectly, to slay all hope of storing CO2 below ground and retaining safe drinking waters. Without doubt the effects of CO2 addition to drinking water aquifers deserve careful investigation. However, the experiments preformed by Little and Jackson are fatally flawed and there are a number of misl...

Various natural (high arsenic bearing strata and pyrite oxidation) and anthropogenic (agricultural, coal mining, metal smelting, and refining industry) sources are involved in arsenic pollution of water. Water, soil, and biological samples (vegetables, fish, and meat) were collected from potentially arsenic affected area Hizla, Bangladesh and analyzed to find the source of arsenic contamination...

Background: The genus of Acanthamoeba is an opportunistic protozoan parasite with a worldwide distribution where it is able to cause fatal granulomatous amoebic encephalitis (GAE) and amoebic keratitis (AK). This organism inhabits in the wide range of natural and man-made aquatic environments. The present study was carried out to evaluate the presence of Acanthamoeba spp. in the various water r...

Large areas of abandoned tin-mining pools have found secondary uses which provide natural habitats for aquaculture activities where most freshwater fishes are bred. Soils from tin-mining areas are rich in uranium and thorium. A study has been conducted on the status of waters and aquatic habitats in disused tin-mining pools and at water intake points for public drinking water supply to assess t...