محمود علیمحمدی
دانشکدة بهداشت دانشگاه علوم پزشکی تهران، استادیار گروه مهندسی بهداشت محیط
[ 1 ] - شیرین سازی آبهای شور و لب شوردست ساز با استفاده از تکنولوژی انجماد
امروزه تعداد زیادی ازکشورها دارای مشکل کم آبی و اکثر آنها مجبور به استفاده از روشهای شیرین‌سازی آب برای تهیة آب آشامیدنی هستند. اگر چه فرایندهای مختلف دیگری همچون اسمز معکوس و تقطیر چند تأثیره به صورت تجارتی برای نمک‌زدایی استفاده می‌شوند اما فرایندهای دیگری هم از جمله انجماد و تبخیر خورشیدی وجود دارد که برای مناطق و زمان‌های خاص مفید و سودمند است. این مطالعه اثر انجماد غیرمستقیم برای نمک‌زدایی...
[ 2 ] - Fabrication of ultrathin graphene oxide-coated membrane with hydrophilic properties for arsenate removal from water
Terms and conditions of current drinking water quality standards, including reducing the maximum arsenic concentration from 50 μgl-1 to 10 μgl-1 and predicted stricter standards in future, reveals the necessity for development of new technologies. This study aimed to prepare and evaluate a new nanocomposite membrane using graphene oxide (GO) thin layer to remove arsenic (v) from water. To fabri...
[ 3 ] - Evaluating efficiency of radio waves for microbial removal in water samples
The most common used methods for water disinfection were chemicals like chlorine, ozonation, ultraviolet radiation, membrane processes, etc. Water disinfection using irradiation techniques is new in water treatment industry which has been developed recently. The aim of the present study was to investigate radio frequency (RF) efficiency for the inactivation of total coliform (TC), fecal colifor...
[ 4 ] - Removal of natural organic matter from aqueous solutions by electrocoagulation
Natural organic matter (NOM) affects some qualitative parameters of water such as color. In addition, it can deteriorate the performance of water treatment process including coagulation, adsorption, and membranes. NOM also reacts with chlorine in the chlorination process and may form disinfection by-products. The present study was carried out in laboratory-scale in a batch system using a cylind...
[ 5 ] - 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...
[ 6 ] - سنجش میزان کل ترکیبات آلی فرار در هوای آزاد و محیط داخلی چهار مهدکودک در شهر اهواز
زمینه: امروزه ترکیبات آلی فرار به عنوان یکی از شناخته‌ترین آلاینده‌های هوا به ویژه در محیط‌های داخلی محسوب می‌گردند. هدف اصلی این مطالعه سنجش میزان TVOC در هوای محیط داخل و آزاد اطراف مهدکودک‌های مورد نظر و بررسی ارتباط غلظت‌های داخل و خارج با یکدیگر بود. مواد و روش‌ها: سنجش در 4 مهدکودکِ شهر اهواز و در پنج روز متوالی بین ساعات 9 تا 10 صبح صورت گرفت.به طور کلی 40 نمونه جمع‌آوری شد. در این مطالعه...
[ 7 ] - ارزیابی کاربرد مدل های تجزیه و تحلیل اثر حالت خطا، ابزار ارزیابی سریع منحصربفرد و آنالیز مقدماتی خطر به منظور بهبود فرآیند مدیریت پسماندهای بیمارستانی: مطالعه موردی بیمارستان فاطمه زهرا (س)
Background and purpose: Identification of risk in hospital waste management have a major role in reducing the cost of surplus and preventing the spread of diseases. In this quantitative analysis, we aimed at determining waste components, evaluating hospital waste management, and prioritizing the risks in Sari Fatemeh Zahra Hospital. Materials and methods: We performed a descriptive-cross-secti...
[ 8 ] - بررسی احیای فتوکاتالیستی کروم شش‌ظرفیتی توسط نانوذرات سبز آهن در محلول‌های آبی: یک مطالعه آزمایشگاهی
Background and Objective: Hexavalent chromium (Cr (VI)) is a highly toxic pollutant that isknown as a carcinogen and mutagen agent to humans. Photocatalytic reduction is one of the known ways to remove these contaminants. Therefore, the aim of this study was to investigate the catalytic effect of green iron nanoparticles, as eco-friendly materials, on photocatalytic reduction of Cr (VI) from wa...
[ 9 ] - بررسی کارایی اکسیداسیون پرسولفات با کانی سیدریت در حذف ترکیبات نفتی از خا کهای آلوده
Introduction and purpose: Soil contamination by petroleum is mostly resulted from oil exploration, refining processes, leaking of oil products from storage tanks, leaking from pipelines due to pipe friction and decay, refinery wastewater discharge and agricultural irrigation with such materials. Sodium persulfate (Na2S2O8), which is a chemical oxidant, could be activated in ...
[ 10 ] - بررسی تاثیر اقلیم بر کیفیت شیمیایی آبخوان دشت ورامین با استفاده از نرم افزار GIS
Background and Objective: Climate change in recent years has led to a crisis of drought in many countries around the world, including Iran. In such a situation, the supply of safe drinking water is very important and knowing the climate impacts on the chemical quality of these resources can play a significant role in their proper exploitation. Materials and Methods: Using GIS geomorphology mod...
[ 11 ] - بررسی خصوصیات ژئوشیمیایی آبهای بطری شده در ایران با استفاده از مختصات‌یابی و نسبت‌های یونی
Background and Objective: Bottled water consumption is rapidly increasing in recent years for various reasons.The main aim of this study was to survey the geological origin of Iranian bottled water and determine compliance or lack of compliance with the experimental data obtained through sampling 71 brands of drinking bottled water and mineral water. Materials and Methods: In this study the ...
[ 12 ] - شیوع استافیلوکوکوس اورئوس در چهار نمونه تجاری معتبر از دوغهای تولیدی ایران
Background and Objectives: Doogh is considered as one of the traditional drink in Iran and other nations like Eastern Europe, Middle East and Asia. In the past the “doogh” was applied to a product which remained after dilution of full fat yoghurt with water and fat separation using the musk. Nowadays Doogh has have physical, chemical, physico-chemical, microbial and sensory characteristics and ...
[ 13 ] - Review on the Implementation of the Islamic Republic of Iran about Tobacco Control, Based on MPOWER, in the Framework Convention on Tobacco Control by the World Health Organization
Background: Smoking is the largest preventable cause of death in the world, killing nearly 6 million people annually. This article is an investigation of measures implemented laws in the Iran to study the proposed strategy of control and reduce tobacco use based on the monitor, protect, offer, warn, enforce and raise (MPOWER) policy.Methods: All laws approved by the Parliament along with the in...
[ 14 ] - Survey of drinking water quality of household water treatment and public distribution network in Garmsar city, under the control of water safety plan
Background and Objective: Surface water and underground water quality in countries that facing dehydration have increased the interest of the community to use Household Water Treatment devices. The aim of this study was the evaluation of the quality of drinking water of Household Water Treatment devices and general distribution network in Garmsar, which is under the control of the water safety ...
[ 15 ] - An investigation of validity and reliability of a questionnaire for use-patterns of household cleaning, personal care, and cosmetic products
Background and Objective: Regular use of household cleaning products and cosmetics can result in adverse consequences for human health. Therefore, the knowledge of consumption pattern of these products can help to evaluate the effects and finally control the consequences of their inappropriate application. As there is not an appropriate tool for evaluating public use-pattern for these products ...
[ 16 ] - The effect of establishment of health services offices affiliated to Tehran university of medical sciences on environmental health indicators in 2020
Background and Objective: Outsourcing services to the private sector can be a step towards achieving the goals of community health promotion, job creation, better access to health services, and improving the quality of health services. In this regard, health service offices were established in Tehran to improve the health status of food preparation, distribution and sale centers and increase fo...
[ 17 ] - Evaluation of chemical and microbial quality of bottled water in Iran and calculation of water quality index
Background and Objective: The aim of this study was to evaluate the chemical and microbial quality of bottled water in Iran and to calculate the water quality index (WQI). Materials and Methods: Different brands of bottled water (4 samples from 71 brands) were randomly collected from the market. Chemical and microbial characteristics of the samples were examined and determined. Finally, the ca...