MicrosoftInternetExplorer4 Background and Objectives: Cyanide is a toxic pollutant existing in the various industrial effluents such as iron and steel, coal mining, non-ferrous metals manufacturing and metal plating. Its presence in water resources and wastewater, as serious hazardous substances leads to undesirable effects on both the environment and human. Thus, its concentration control...

Background and purpose: In activated sludge process large amounts of sludge are produced. The disposal and management of this sludge remains a big challenge due to environmental, economic, social and legal factors. Thus, selecting an appropriate process that could reduce sludge would be of great help in solving this problem. The aim of present research was to determine the effects of three pr...

  Background: 4-Chlorophenol is used frequently in industries including refineries petrochemical, industries pesticide industries and many others. This compound causes damage to environment. The purpose of this research was the survey of 4-chlorophenole degradation by Fe°/H2O2 of synthetic wastewater and resulting intermediate compounds.   Methods: This study is an applied- experimental researc...

Introduction: Phenol is one of the aromatic hydrocarbons that exist in wastewater of various industries such as manufacturing chemicals, oil refinery and petrochemical industries. Because of its high toxicity and undesirable effect on organisms, its concentration control is essential in nature. The main objective of this study was to evaluate the efficiency of the Fenton oxidation process for t...

Background and Aim: Nowadays, regarding the increased human and geological activities, concentrations of toxic and carcinogenic disinfectant by-products– like Trihalomethanes -which have an organic base, in drinking water sources, has worryingly increased. Thus, the present study aimed at surveying the amount of dissolved organic carbon (doc) removed from aqueous solution by Fenton process. Mat...

Background and objectives: Because of problems dealing with bioremediation including being time consuming, low efficiency and toxicity to biota, application of advanced oxidation processes with higher efficiency and shorter remediation time have been considered for removal of hydrophobic hydrocarbons from contaminated soils. A great interest has been directed to Fenton oxidation because of its ...

Background and Aim: Discharge of Wastewater of Cleaning Industries to environment with special physicochemical characteristics has negative effects and in the other hand is not easily biodegradable because in these wastewaters ratio BOD5/COD is low and therefore biological treatment of them is difficult. Nowadays best method for degradation of Wastewater is advance oxidation processes .In this ...

Background and Aim: 2,4-Dichlorophenol (DCP) is a compound  generated in a variety of industrial processes and also by chlorine disinfection of water polluted with phenolic compounds . Dumping of DCP into the environment and water resources is of great concern because of the compound's intense odor and toxicity. DCP is very soluble and resistant to biodegradability so it cannot be removed throu...

سابقه و هدف: مطالعاتی که تاکنون در مورد میانکش dna و یون های فلزی مختلف انجام شده است، حاکی از تاثیر مهم فلزات بر ساختار dna و ایجاد شکست در آن می باشد. در مطالعه حاضر به بررسی اثر فلزات مس، کادمیوم و کروم بر dna باکتریایی اشریشیاکلی سویه ptcc1399 پرداخته شده است. مواد و روش ها:dna خالص شده از باکتری برای 1 ساعت در دما 37 درجه با غلظت های مختلف فلزات (1-100µm) و هم چنین (mm100-0.1) h2o2 انکوبه ...

در این تحقیق، تاثیر سه عامل زمان، غلظت هیدروژن پراکسید و مقدار نانوکاتالیزگر فریت مس(CuFe2O4) سنتز شده بر روی حذف ماده رنگزای نارنجی متیل مورد مطالعه قرار گرفت. برای بهینه‌سازی بازده حذف ماده رنگزا از روش سطح پاسخ بر اساس طراحی Box-Behnken استفاده شد. شرایط بهینه برای حذف ماده رنگزای نارنجی متیل با غلظت mg/l 50 در زمان 109.26 دقیقه، با غلظت هیدروژن پراکسید 24.42 میلی‌مولار و مقدار کاتالیزگر 49....