نتایج جستجو برای: decresed with increasing initial concentration and increased with increasing contact time

تعداد نتایج: 18593274  

ژورنال: سلامت و محیط زیست 2011
سمرقندی, محمد رضا, شکوهی, رضا, شیرزادسیبنی, مهدی, واحدی, حوریه, پورفرضی, فرهاد,

Background and Objectives: Industrial wastewater included the dyes one of the important sources of environmental pollution, that founded in loom wastewater which are harmful for human health and environment. Therefore, the purpose of this research was investigated removal of RB5 dye from aquatic solution by using of adsorption onto synthesized magnetic sodium alginate beads.Material and Methods...

Journal: :iranian journal of toxicology 0
رضا شکوهی reza shokoohi department of environmental health engineering, hamadan university of medical sciences, hamedan, iran.دانشگاه علوم پزشکی همدان، دانشکده بهداشت صلاح عزیزی salah azizi m.sc of environmental health engineering, student research center, hamadan university of medical sciences, hamedan, iran.دانشگاه علوم پزشکی همدان، دانشکده بهداشت سید امیر قیاثیان seyed amir ghiasian department of mycology and parasitology, hamadan university of medical sciences, hamedan, iran.دانشگاه علوم پزشکی همدان، دانشکده بهداشت علی پورمحمدی ali poormohammadi ph.d. by research student of environmental health engineering, social development and health promotion research center, kermanshah university of medical sciences, kermanshah, iran.دانشگاه علوم پزشکی همدان، دانشکده بهداشت

background: this study aimed to investigate the biosorption of pentachlorophenol on aspergillus niger biomass as a method for removal of pentachlorophenol from aqueous solutions. methods: modified a. niger biomass with naoh was used to absorb the pentachlorophenol. the impacts of various experimental parameters like primary pentachlorophenol concentration, ph of the solution, contact time, and ...

Journal: :مجله دانشگاه علوم پزشکی کرمانشاه 0
jamshid derayat abbas rezaee sayed bagher mortazavi yadollah yamini ali khavanin ardalan soleimanian

introduction: wastewaters of chemical, petrochemical, electrical, pharmaceutical and paper industries are the main sources of mercury and its compounds. mercury is one of the toxic elements, so its removal from water and industrial wastewaters seems to be important and essential. the objective of this study was to investigate effective factors such as ph, contact time, absorbent dose, mixing ra...

ژورنال: سلامت و محیط زیست 2013
رحمانی, علیرضا, شیرزاد سیبنی, مهدی, عسگری, قربان, فرخی, مهرداد,

Background and Objectives: Dyes are one of the main environmental pollutants in the industrial effluents including textile industries, which are harmful for human health and environment. The purpose of this research was to investigate removal efficiency of Reactive Black 5 (RB5) dye using adsorption onto strongly basic anion exchange resin as an appropriate adsorbent. Materials and Methods: Af...

ژورنال: طلوع بهداشت یزد 2015
محوی, امیر حسین , پورفداکاری, سودابه ,

Abstract Introduction: Dye effluents of some industries contain many toxic, carcinogenic, and mutagenic compounds therefore, wastewater colored contaminants of such industries should be meticulously refined using an appropriate method before discharging waste-water to the environment. Therefore, this study aimed to evaluate the effectiveness of Multi-Walled Carbon Nanotubes (MWCNTS) in dye r...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه خلیج فارس - دانشکده مهندسی 1393

in civil engineering concrete is a material combined of hydraulic cement, sand, gravel and water. gravel and sand compose 60 to 70 percent of concrete. these aggregates support compression force of concrete. cement paste acts as glue to stick grain together. in bushehr factories producing aggregates do not operate according to astm standards, so that fineness modulus (fm) of the produced sands ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده ادبیات و علوم انسانی دکتر علی شریعتی 1392

a large number of single research studies on the effects of strategy-based instruction (sbi) in teaching english as a foreign or second language has been conducted so far. however, the lack of a comprehensive meta-analysis targeting the effectiveness of english language sbi is observed. moreover, the findings of experimental studies regarding the context of the english language, proficiency lev...

ژورنال: سلامت و محیط زیست 2015
زارعی, حمید, شمیرانی, فرزانه, محوی, امیرحسین, ناصری, سیمین, نبی زاده نودهی, رامین,

Objective and Background: Fluoride is an element widely found in the earth crust. Advantages and disadvantages of fluoride in the human body are depended on its concentration. Long-term consumption of drinking water contaminated with arsenic can cause adverse health effects such as skin lesions and cancer in humans. The aim of this study was to study efficiency of nano alumina on multi walled c...

ژورنال: طلوع بهداشت یزد 2014
احرام پوش, محمد حسن , اسماعیلی, حبیب الله , امراللهی, محسن, سلیمانی خمارتاش , قربان, علیدادی, حسین , قانعیان, محمد تقی , نجف پور, علی اصغر,

Abstract Introduction: The heavy metals are the most important pollutant that their concentration in environment is increasing with cities and industrials developing. One of this metals is chromium that in the trivalent and hexavalent oxidation state used in industries such as electroplating, glass, ceramic, tannery and leather. Hexavalent chromium has proven several health hazards such as a c...

Journal: :iranian journal of health sciences 0
mansooreh dehghani shiraz university of medical sciences, shiraz, iran mohammad ahmadi shiraz university of medical sciences, shiraz, iran simin nasseri tehran university of medical sciences, tehran, iran

background and purpose: highly consumption of antibiotics and their entrance into the environment has increased concerns all over the world. these compounds enter to the environment through an incomplete metabolism and a considerable amount of them cannot be removed using usual waste filtration systems. therefore, the present study aimed to investigate the feasibility of using ultraviolet radia...

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