Hiua Daraei
Lecturer, Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran
[ 1 ] - Assessment of DMFT and its influencing factors in guidance school students in Pirnshahr city, Iran
DMFT index is one of the best dental epidemiological indices, which represent the oral health status of the population and has been accepted by authorities and international organizations such as the World Health Organization. The aim of this study was to assess the permanent teeth DMFT index in guidance school students to determine the influencing factors such as brushing, tea and sugar consum...
[ 2 ] - Application of Artificial Intelligent Approaches for the Efficiency and Energy Consumption of a Novel Sonocatalyst
The sonocatalytic activity of nano-sized ZnO powder was studied via the degradation of the Direct Blue 71 azo dye. The nano-sized ZnO powder that was selected was the same as that which was synthesized and characterized in our previous study. The influences of six operational parameters including the initial pH, the initial concentration, the dose of sonocatalyst, the ultrasound frequency, the ...
[ 3 ] - Experimental investigation, modeling, and optimization of combined electro-(fenton/coagulation/flotation) process: design of experiments and artificial intelligence systems
In this study, a combined electro-(Fenton/coagulation/flotation) (EF/EC/El) process was studied via degradation of Disperse Orange 25 (DO25) organic dye as a case study. Influences of seven operational parameters on the dye removal efficiency (DR%) were measured: initial pH of the solution (pH0), applied voltage between the anode and cathode (V), initial ferrous ion concentration (CFe), initial...
[ 4 ] - Spatial distribution of fluoride in groundwater resources in selected parts of Kurdistan Province, Iran, using the geographical information system
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...
[ 5 ] - Assessment of household reverse-osmosis systems in heavy metal and solute ion removal in real and synthetic samples
In this study, the efficiency of household reverse-osmosis system (HROS) with and without neutralizer accessory was investigated in both real and synthetic samples. The real samples were collected from rural and urban public drinking-water systems with and without primary refinery treatment. The selected areas were situated in the Kurdistan province, Iran. The HROS model RO100GPD with and witho...
[ 6 ] - Temporal and spatial variation of drinking water quality in a number of Divandareh villages, Iran: With emphasis on fluoride distribution
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...
[ 7 ] - Hydrothermal synthesis of surface-modified copper oxide-doped zinc oxide nanoparticles for degradation of acid black 1: Modeling and optimization by response surface methodology
Dyes are widely used in various industries most of them are not readily biodegradable and are consisted of number of toxic, mutagenic, and carcinogenic compounds. Therefore, it is essential to remove them from effluent before their discharge to the environment. The objective of this investigation was to synthesize copper oxide (CuO) doped zinc oxide (ZnO) nanoparticles under mild hydrothermal c...
[ 8 ] - Assessment of chemical quality of drinking water in rural area of Qorveh city, Kurdistan province, Iran
Groundwater aquifers as one of the main sources of water supplies are faced with different risks such as level dropping due to lack of precipitation, and natural and non-natural pollutants. Thus, it is extremely necessary to monitor ground water quality. In the present study, the concentration of cations, anions, and some toxic metals was evaluated in 21 rural water supplies in Qorveh plain in ...
[ 9 ] - Concentration levels of heavy metals in irrigation water and vegetables grown in peri-urban areas of Sanandaj, Iran
Concentration and daily intake (DI) of heavy metals [lead (Pb), chromium (Cr), cadmium (Cd) and copper (Cu)] were investigated in four common edible vegetables including coriander, dill, radish root and radish leaf grown at peri-urban sites in Sanandaj, Iran. A total of 120 composite samples of vegetables were taken from ten vegetable farms during six months from May to October 2012. Inductivel...
[ 10 ] - Assessment of ultrasound irradiation on inactivation of gram negative and positive bacteria isolated from hospital in aqueous solution
Microbial contamination of water poses a major threat to public health. With the emergence of microorganisms resistant to multiple antimicrobial agents, there is increased request for promotion of disinfection methods. Since ultrasound wave (US) exhibits antibacterial activities on bacteria, the aim of this study was to evaluate the antimicrobial effect of low frequency (37 kHz) ultrasound on P...
[ 11 ] - Investigation of potato peel-based bio-sorbent efficiency in reactive dye removal: Artificial neural network modeling and genetic algorithms optimization
Over the last few years, a number of investigations have been conducted to explore the low cost sorbents for the decontamination of toxic materials. Undoubtedly, agricultural waste mass is presently one of the most challenging topics, which has been gaining attention during the past several decades. Wastes are very cheap and easily available material in production of sorbent. Therefore, the Rea...
[ 12 ] - کارایی روش نوین انعقاد الکتریکی پالسی در شفافسازی آبسیب
در این مطالعه فرایند انعقاد الکتریکی پالسی (PEC) در شفافسازی آبمیوه بررسی شد. در ادامه اثر 3 متغیر زمان پالسدهی (1، 3 و 5 دقیقه)، زمان فرایند (5، 10، 30 و 45 دقیقه) و شدت جریان الکتریکی (0/03، 0/1 و 0/5 آمپر) هرکدام در 3 تکرار بر کارایی فرایند بررسی شد. مطالعۀ تأثیر پارامترهای عملیاتی نشان داد در فرایند PEC، بهترین کدورت برابر با 5 NTU، در شدت جریان الکتریکی 03/0 آمپر، زمان پالس 5 دقیقه، زم...
[ 13 ] - حذف 4- کلروفنل از محیطهای آبی با استفاده از جاذب نانوساختار اکسید گرافن
در این تحقیق اکسید گرافن بهعنوان یک جاذب نانو ساختار با خواص بهتری نسبت به سایر جاذبها برای حذف 4-کلروفنل از محیط آبی مورد بررسی قرار گرفت. اکسید گرافن با روش هامر سنتز شد. برای شناسایی مورفولوژی و ساختار جاذب از روشهای پراشسنجی پرتو ایکس و تصویر میکروسکوپ پراش الکترونیکی استفاده شد. متغیرهای مؤثر بر فرایند جذب از جمله غلظت اولیه 4-کلرو فنل، مقدار جاذب و pH بهروش تغییر یک عامل در زمان بررس...
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