نتایج جستجو برای: fluoride of water
تعداد نتایج: 21220042 فیلتر نتایج به سال:
Background and purpose: Fluoride is a major mineral pollutant in groundwater. Long-term exposure to high concentration of fluoride in drinking water causes dental fluorosis, skeletal and non-skeletal fluorosis. Therefore, highly efficient water treatment that could lower the concentration of fluoride in groundwater is a challenge. This study aimed at evaluating the efficiency of Nanofiltration ...
fluoride in drinking water has a profound effect on teeth. since drinking water is an important source of fluoride, the evaluation of the fluoride content of water resources is necessary. temporal variations and spatial distribution of fluoride in drinking water of some selected parts of kurdistan province, iran, have been studied using geographic information system (gis) techniques. thus, 40 v...
Fluoride is found in all water resources at different concentrations and drinking water is the major source of fluoride exposure. Thus, because of the adverse effect of fluoride in low and high concentrations, the evaluation of its content in drinking water is necessary. In the present study, the temporal variations and spatial distribution of fluoride concentrations in the drinking water of vi...
in this study, the effects of oleothermal modification on physical and mechanical peroperties of fir wood (abeis sp.) blocks were examined. at first, some blocks of fir wood with 5 × 20 × 120 cm dimensions were prepared. the blocks were treated in soybean oil. the effects of 3 factors such as treatments temperature (180and 200 °c), holding time (12 and 15 h) and initial moisture content of wood...
besides human dental and skeletal fluorosis, drinking water above permissible levels of fluoride is known to cause a wide range of adverse health effects. in this study, the adsorption of fluoride from aqueous solution onto pretreated zeolite has been studied by using batch test. the large surface area of natural zeolite (i. e., clinoptilolite from miyaneh region, iran) was utilized to create a...
abstract background and purpose fluoride is one of the fundamental and required components in human body. the current study intends to survey the status of fluoride in drinking water supplies ( underground water source and drinking water) in qaemshahr city from 2006 (march/21) to 2012(march/19) and comparison with universal standards, national and climatic conditions. materials and methods this...
Background and Aim: Human and animal studies linking fluoride with diminished intelligence have been published. Although adverse effects of high intake of fluoride on intelligence and mental acuity continue to be reported, they are still controversial. The aim of this research was to investigate the relationship between fluoride in drinking water and children's intelligence. Materials and Metho...
Fluoride in drinking water has a profound effect on teeth. Since drinking water is an important source of fluoride, the evaluation of the fluoride content of water resources is necessary. Temporal variations and spatial distribution of fluoride in drinking water of some selected parts of Kurdistan Province, Iran, have been studied using geographic information system (GIS) techniques. Thus, 40 v...
background: as fluoride concentration in drinking water is one of the effective parameters in human health, finding the ways to remove excess amount of fluoride is very important in water supply projects. this study aimed to evaluate mendon bauxite mine in the removal of fluoride from drinking water. methods: this experimental study was conducted from may to october 2013 on synthetic and actual...
بررسی میزان فلوراید آب آشامیدنی مناطق روستایی شهرستان رفسنجان در بهار و تابستان 1394: یک گزارش کوتاه
Background and Objectives: Fluoride concentration of 0.5 to 1.5 mg/l in drinking water has a positive effect on prevention or reduction of teeth decay. Today, fluoride needed to prevent teeth decay is primarily provided from drinking water. The aim of this study was to survey the amount of fluoride in drinking water in rural areas of Rafsanjan and its comparison with National and World Health O...
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