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بهرامی, عبدالرحمان

دانشگاه علوم پزشکی همدان

[ 1 ] - حذف بخارات اتیل بنزن با استفاده از نانوکامپوزیت MnO2/Al2O3/Fe2O3پوشش شده بر روی بستر زئولیت HZSM-5

Background and aims: Ethylbenzene (EB) is one of the most hazardous carcinogenic VOCs that is used or produced in various industrial, so it is important to reduce its use and control its emissions. The aim of this study is determine the effectiveness of MnO2/Al2O3/Fe2O3 nanocomposite coated on HZSM-5 Zeolite for the removal of ethylbenzene vapors. Methods: Nanocomposite coated on HZSM-5 zeolit...

[ 2 ] - اثر تلفیقی پلاسمای غیرحرارتی و نانوکمپوزیت کربن فعال-اکسید روی بر حذف هیدروکربن های آلی فرار هوا

Background and aims: Regarding high emission rates of volatile organic compounds in the atmosphere by different industrial and transportation sources and their adverse effects on human health and the environment, the need to remove these chemicals from gas streams using new technologies with low energy consumption and high efficiency has been more evident. In this study, the catalytic effect of...

[ 3 ] - نمونه برداری و تعیین مقدار کلروبنزن در هوا با روش میکرواستخراج فاز جامد-گاز کروماتوگرافی طیف بین جرمی

Abstract Background and aims: The chlorobenzene is an intermediate chemical that is used in the production of commodities such as herbicides, dyestuffs, and rubber and Causes neurological complications and effects on the respiratory tract. In this research solid phase micro extraction (SPME) was used for the sampling of chlorobenzene in air. The optimum conditions for analysis with gas chrom...

[ 4 ] - پالایش بخارات کلروفرم با استفاده از راکتور پلاسمای غیر حرارتی جدید (سال 1394)

Background and aims: One of the innovative technologies for air pollution control is non-thermal plasma. The dielectric barrier discharge reactor is one of the reactors that applied in non thermal plasma technology for air polluation control. In dielectric barrier discharge reactor, the distance between the electrodes for electric discharge is low and led to increasing space velocity of the pol...

[ 5 ] - بررسی تأثیر کاربرد سورفکتانتها به‌همراه آب‌آهک و بیکربنات‌سدیم در حذف دی اکسیدگوگرد در اسکرابر بستردار

Background and aims: The emission of sulfur dioxide in air has hazardous effects on human health and environment. In this research the use of surfactants with sodium bicarbonate and limestone for the removal of sulfur dioxide was studied. Methods: A packed scrubber was used and the effect of absorbents (limestone or sodium bicarbonate), the kind and concentration of surfactants were assessed...

[ 6 ] - کنترل غبار منتشره با تلفیق تهویه صنعتی و مه پاش به‌عنوان راهکار مؤثر و اقتصادی در یک شرکت معدنی

Background and aims: Dust emission is one of the main health and environmental problems during the crushing, screening and conveying process in mining company. The goal of this study was designing, implementation and evaluation of industrial ventilation and combination with a water spray for control the airborne particles as well as economic analysis on crushing unit of a mining compa...

[ 7 ] - بررسی کارایی اسکرابر ونچوری در جمع‌آوری گردوغبار هوابرد Fe2O3 در یک واحد آهن‌سازی

Background and aims: Steel industry plays an important role in air pollution and particulate emissions released to the environment. The Venturi scrubber is one of the most important scrubbers and components at local exhaust ventilation which has a lot of application to control of the contaminants emissions to the atmosphere in the steel industry. On the other hand, the efficiency of this equipm...

[ 8 ] - استخراج تولوئن و متیل اتیل کتون از نمونه‌های آبی به روش به‌دام‌اندازی توسط سوزن و جاذب سنتز شده بر پایه ترکیبات نانو

Background and Aims:Nowadays, many different techniques to extraction of chemical compounds from aquatic  samples have been introduced, for examples techniques based on the use of needles that were packed with some sorbents. Considering that so far no synthesis sorbent based on single-walled carbon nanotubes and sol-gel techniques for the extraction of toluene and methyl ethyl ketone from ...

[ 9 ] - کاربرد نانولوله کربنی چند دیواره سنتز شده با تکنیک سل – ژل برای تعیین تتراکلرید کربن درهوا با روش ریز استخراج فاز جامد

Background and aims: Conventional Methods for determination of volatile organic pollutants in the air are based on solvent extraction. Solid-phase microextraction (SPME) has been popular as an environmentally friendly technique to extract a very wide range of analytes. SPME fibers have some drawbacks that can be overcome by use of sol-gel nanosorbents. Therefore the aim of this study has been t...

[ 10 ] - مقایسه فصلی میزان انتشار ترکیبات آلی فرار در صنایع شیمیایی وابسته به نفت طی سال های 1391 و 1392

Background and aims:  volatile organic compounds VOCs are emitted from a variety of sources and production may be impacted harmful to the health, welfare and human performance. No doubt the first step to controlling pollutants are measured and analyzed, because without full knowledge of the quality and quantity of pollutants compared with the limits and the possibilities of their control would ...

[ 11 ] - کاربرد روش تله سوزنی (Needle Trap) در تعیین مقدار ترکیبات ارگانوهالوژن در هوا

  Background and aim s : The correct assessment of volatile organic compounds is a main stage of their control's action plan. Needle trap device (NTD) as a novel technique with all advantages of microextraction methods, is an inexpensive and rapid technique for survey of air pollution agents. In this study the performance of this technique was investigated for sampling and analysis of organohal...

[ 12 ] - بررسی ارتباط بین غلظت های محیطی و سطوح مواجهه فردی با فرمالدئید در بخش های پاتولوژی بیمارستان‎های آموزشی دانشگاه علوم پزشکی همدان

Background: Formaldehyde used in the pathology and histology laboratories as a tissue fixation. Formaldehyde classified in group A1 (human carcinogen) by the International Agency for Research on Cancer (IARC). The aim of this study was the evaluation of relationship between ambient concentrations and time-weighted average or ceiling exposures of formaldehyde the pathology departments. Methods:...

[ 13 ] - ارزیابی میزان اثربخشی سیستم تهویه دمشی-مکشی در کنترل سرب، روی و اسیدسولفوریک منتشره از وان های الکترولیز روی در یک صنعت تولید روی

Introduction: Air pollution is one of the hazardous factors on human health and the environment. In the zinc production industry, because of process nature and using electrolysis pools, the amount of production and diffusion of some of the harmful pollutants such as acidic vapors is exceedingly high. This study aimed to assess the effectiveness of push-pull ventilation system implemented for co...

[ 14 ] - طراحی و توسعه یک تله سوزنی مبتنی بر جاذب PDMS جهت ریزاستخراج تولوئن و متیل اتیل کتون از نمونه های آبی به روش فضای فوقانی دینامیک

Introduction: Due to the widespread use of toxic chemicals in most workplaces that can lead to toxic effects on human, various chemical extraction technique have been defined for analysis these toxic substances in air, water and biological samples. The purpose of this research is extraction of  toluene and methyl ethyl ketone from aquatic samples with needle trap device and  one co...

[ 15 ] - توسعه روش ریزاستخراج فاز جامد برای تعیین تتراکلریدکربن و کلروفرم در هوا به روش گاز کروماتوگراف-طیف بین جرمی

Introduction: In this research the solid phase micro extraction (SPME) for sampling and determination of carbon tetrachloride and chloroform in air was developed and effect of ambient parameters on SPME was assessed. Methods: For this purpose standard chamber was built in the laboratory. The concentrations of compounds in the chamber were measured with SPME. The optimum condition for extract...

[ 16 ] - تجزیه آلکان‌ها و آلدئیدهای درون‌زاد در هوای بازدم شاغلین در مواجهه با غبار حاوی سیلیس

 Background & Objectives : Silica is one of the most air pollutant in workplaces which long-term occupational exposure to silica is associated with an increased risk for respiratory diseases such as silicosis. Silicosis is an oxidative stress related disease and can lead to the development of lung cancer. This study aims to analysis of endogenous alkanes and aldehydes in the exhaled breath...

[ 17 ] - بررسی مواجهه شغلی با ترکیبات آلی فرار سرطان‌زا در یک صنعت شیمیایی وابسته به نفت: مطالعه موردی بر روی بنزن و اپی کلروهیدرین

Methods:&nbsp;Among 346 collected samples, benzene was identified in all cases (100%) and epichlorohydrin in 156 samples (45%). A significant difference was found in the mean of exposure to benzene and epichlorohydrin in various workshops (Pvalue <0.05). Occupational exposure to benzene in machiner with 1.68 ppm and patrol officers with 0.018 ppm were the highest and lowest values, respectively...

[ 18 ] - Recent Advances in Microextraction Methods for Sampling and Analysis of Volatile Organic Compounds in Air: A Review

Human exposures to volatile organic compounds (VOCs) are associated with a wide range of health problems. Due to these adverse effects of VOCs on the human health, determination of trace levels of VOCs is very important for accurate assessment of indoor and outdoor exposure. Solid phase microextraction (SPME), needle trap device (NTD) and hollow fiber- liquid phase microextraction (HF-LPME) are...

[ 19 ] - Design and evaluation of local ventilation system and packed bed scrubber and control of hydrogen sulfide emitted from the dryer lines of a Pulp Industry

Abstract Introduction: The diffusion of pollutants Methyl Mercaptan, Hydrogen Sulfide, Dimethyl sulfide and Dimethyl disulfide from dryer machines of pulp industries will cause to smell annoyance and health effects on the employees and neighbors . This study aimed to determine the effectiveness of local ventilation system and packed bed scrubber implemented for controlling the emitted hydrogen...

[ 20 ] - Fast and Sensitive Determination of Acetic Anhydride in the Air Using Hollow Fiber Method

This study aimed to introduce a new method based on Hollow Fiber in order to determination of acetic anhydride (AA) in the air. Hydroxylamine hydrochloride and sodium hydroxide (1:1), were used as extraction solvent. This method was studied in the laboratory under various conditions. In order to make different concentrations of AA in the air, a standard glass chamber was used. The optimization ...

[ 21 ] - Exposure risk assessment of formaldehyde in four military hospitals in Tehran

Background and Objective: Formaldehyde is a hazardous compound that used as a chemical preservative and disinfectant in medical laboratories and hospitals. The aim of this study was to risk assessment of occupational exposure to formaldehyde in different educational hospitals of Baqiyatallah University of Medical Sciences in Tehran. Materials and Methods:  This descriptive cross-sectional st...