نتایج جستجو برای: tube well water
تعداد نتایج: 2076890 فیلتر نتایج به سال:
OBJECTIVE To study the association between "pregnancy" prevalence (affected births and terminations) of neural tube defects in postcode districts of Glasgow and lead concentrations in domestic water. SETTING Postcode districts of Glasgow supplied by water from the Loch Katrine reservoir. DESIGN An ecological study. Lead concentrations from 1911 randomly selected domestic water samples were ...
BACKGROUND More than 60,000,000 Bangladeshis are drinking water with unsafe concentrations of one or more elements. OBJECTIVES Our aims in this study were to evaluate and improve the drinking water testing and treatment plans for western Bangladesh. METHODS We sampled groundwater from four neighborhoods in western Bangladesh to determine the distributions of arsenic, boron, barium, chromium...
Conventional water treatment plant generates two types of process wastes, filter back wash water and sludge. Characteristic studies of these wastes reveals that it contains high solids content, metals and bacteriological concentration, which are generally more than permissible disposable standards. Direct disposal of these wastes in to natural stream pollutes the receiving streams, affects huma...
Abstract: The diameter and configuration of tubes are important design parameters of power condensers. If a proper tube diameter is applied during the design of a power unit, a high energy efficiency of the condenser itself can be achieved and the performance of the whole power generation unit can be improved. If a tube assembly is to be replaced, one should verify whether the chosen condenser ...
The adsorption study was conducted on three Japanese soils with different soil properties to characterize the adsorption pattern of Arsenic (As). Double tube method was used to find out the effect of soil moisture levels on As adsorption. For this study, besides double tube method, conventional batch method also was used. The As adsorption showed two phase kinetics. An initial and rapid adsorpt...
Natural convection heat transfer from a tube bundle in the indirect water bath heaters is investigated. A computer-code is used for the solution of the governing equations of mass, momentum and energy transfer based on the SIMPLE-C algorithm. Simulations are carried out for the gas pressure station heater of Kermanshah city with various tube bundle arrangements. In order to validate the numeric...
OBJECTIVE To survey tube wells and households in Araihazar upazila, Bangladesh, to set the stage for a long-term epidemiological study of the consequences of chronic arsenic exposure. METHODS Water samples and household data were collected over a period of 4 months in 2000 from 4997 contiguous tube wells serving a population of 55000, the position of each well being determined to within +/- 3...
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