نتایج جستجو برای: providing drinking and hygienic water
تعداد نتایج: 16939674 فیلتر نتایج به سال:
The contamination of 15 ground water resources of a selected region earmarked for the emergency supply of population has been monitored. The resources have been selected on the basis of previous assessment of natural conditions and the exploitation of territory in their surroundings and infiltration area. Two resources out of 15 have been excluded from further exploitation, because they have no...
Background and purpose: Nitrite and nitrate are considered as pollutant agents of ground water resources that cause several hygienic complications. Agricultural fertilizers that contain nitrate are widely used in north of Iran. This study was carried out to determine the concentrations of nitrite and nitrate in agricultural and drinking water wells in rural areas in Miandoroud, Iran. Materia...
during natural gas processing, water in natural gas may cause to hydrates formation in pipelines which may lead to serious damages to process equipments. given the problems raised by present of water in natural gas, glycol solvent uses to remove water.in contact of glycol with gas always an amount of btex and voc absorb along with water, which on glycol recovery process, these substances separa...
determination of uranium in natural water and complex solutions using ion exchange chromatography: a combined procedure using ion exchange chromatography and uv-vis spectrophotometry techniques has been developed to measure uranum in natural water and complex solutions. after conditicing , one hundred milli liters of sample solutions have been passed through an ion exchange column,pachked with ...
Introduction: Application of point-of-use (POU) drinking water treatment units is expanding across the world due to the increased concerns about the adverse health effects of water pollution. The main treatment systems of these devices are mostly activated carbon and nano-filter or reverse osmosis. Materials and Methods: This study was conducted to evaluate the effect of using POU units on phy...
A systematic review of the literature on the effects of water and sanitation in schools was performed. The goal was to characterize the impacts of water and sanitation inadequacies in the academic environment. Published peer reviewed literature was screened and articles that documented the provision of water and sanitation at schools were considered. Forty-one peer-reviewed papers met the crite...
flow in natural river bends is a complex and turbulent phenomenon which affects the scour and sedimentations and causes an irregular bed topography on the bed. for the reason, the flow hydralics and the parameters which affect the flow to be studied and understand. in this study the effect of bed and wall roughness using the software fluent discussed in a sharp 90-degree flume bend with 40.3cm ...
Climate change may increase the incidence of waterborne diseases due to extreme rainfall events, and consequent microbiological contamination of the water source and supply. As a result of the complexity of the pathways from the surface to the consumer, it is difficult to detect an association between rainfall and human disease. The water supply of a Hungarian city, Miskolc (174,000 inhabitant)...
This article presents the results of studies content natural (228Ra, 226Ra, 232Th, 40K, 210Po, 210Pb, 238U) and technogenic (137Cs, 90Sr) radionuclides in drinking water from centralized (wells) decentralized supply sources observation area Belarusian NPP, performed 2016 to 2020 within framework radiation hygienic monitoring at stage construction NPP.
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