نتایج جستجو برای: and removal

تعداد نتایج: 16849197  

In this work, a mathematical model is established to describe the removal of CO2 from gaseous mixtures including CH4 and CO2 in a polypropylene hollow fiber membrane contactor in the presence of conventional absorbents such as monoethanolamine (MEA), methyldiethanolamine (MDEA), and a blend of them. Modeling was performed in axial and radial directions under the fully-wet condition for counterc...

Background and purpose: The present study is aimed to investigate the prediction of the experimental data for the removal of agricultural pesticides including three herbicides Trifluralin, Glyphosate, and 2,4-Dichlorophenoxyacetic acid from aqueous solution by carbon nanoparticles synthesized from pomegranate peel using artificial neural network. Materials and Methods: Removal studies were con...

Journal: :iranian journal of toxicology 0
gagik badalians gholikandi power and water university of technology (pwut), water research institute (wri), tehran, iran محمد مهدی بانشی mohammad mehdi baneshi department of environmental health engineering, school of public health, yasuj university of medical sciences, tehran, iran عماد دهقانی فرد emad dehghanifard water and wastewater research center, water research institute (wri)/environmental health engineering department, school of public health, tehran university of medical sciences, tehran, iran سعید صالحی saeed salehi department of environmental health engineering, school of public health, arak university of medical sciences, arak, iran احمدرضا یاری ahmad reza yari department of environmental health engineering, school of public health, qom university of medical sciences, qom, iran

background: there are great resources of natural zeolite in iran. zeolite, an inorganic ion-exchanger, may be used as a suitable technical-economical solution for water treatment in many regions of iran. in this study, the characterization of natural zeolite natrolite and the feasibility of removing hardness, cations, and anions were investigated. methods: first, zeolite composition and type we...

Background: The purpose of the present study was to assess the efficiency of ultrasound/hydrogen peroxide processes and ultrasound/hydrogen peroxide/ZnO nanoparticles in the removal of blue cat 41 dye from aqueous solutions. Methods: ZnO nanoparticles were prepared using the hydrothermal method. Variables including pH, concentration of ZnO nanoparticles, initial dye concentration, concentratio...

Journal: :محیط شناسی 0
مجید ریاحی سامانی دانشجوی دکتری مهندسی محیط زیست، دانشکدة محیط زیست و انرژی، دانشگاه آزاد اسلامی واحد علوم و تحقیقات، تهران سید مهدی برقعی استاد دانشکدة مهندسی شیمی و نفت، دانشگاه صنعتی شریف، تهران علی اولاد استادیار شیمی کاربردی، دانشکدة شیمی، دانشگاه تبریز محمد جواد چاییچی استادیار شیمی تجزیه، دانشکدة علوم پایه، دانشگاه مازندران، بابلسر

absorptive characteristics of polyaniline synthesized with two different oxidants including potassium iodate and ammonium persulfate was studied. synthesized polyanilines in powder shape is used as an adsorbent to remove toxic hexavalent chromium from aqueous solutions. experiments were conducted in batch mode with different variables such as agitation time, solution ph and initial concentratio...

Background and purpose: Antibiotics are non-biodegradable and wastewater treatment processes are not fully effective in their removal. Therefore, presence of some antibiotics such as erythromycin and metronidazole in environment has become a major concern in recent years. The aim of this study was to evaluate TiO2 nano-particles for removal of these two antibiotics from aqueous solution based o...

ژورنال: علوم آب و خاک 2019

Shortage of water resources and renewable per capita in last 30 years is put Iran on crisis threshold. Wastewater reuse is one of the battle solutions for water shortage and prevents wastewater depletion and environmental pollution. Thus, a pilot scale experiment was carried out to evaluate an integrated anaerobic/aerobic treatment for removal of BOD5 and COD, also to reduction of hydraulic ret...

Journal: :journal of health sciences and surveillance system 0
majid nozari department of environmental health engineering, school of health, shiraz university of medical sciences, shiraz, iran mohammad reza samaei department of environmental health engineering, school of health, shiraz university of medical sciences, shiraz, iran mansooreh dehghani department of environmental health engineering, school of health, shiraz university of medical sciences, shiraz, iran

background: among alkanes, n-alkanes with medium chain have been identified as the most important contaminants of the soil. n-hexadecane (c16h34) with low solubility in water also belongs to this group and has been used by many researchers as a model contaminant. the present study aimed to investigate the effect of the external source of carbon (glucose) as co-substrate on removal of hexadecane...

ژورنال: سلامت و محیط زیست 2015
اژدرپور اسفند آبادی, ابوالفضل, دهقانی, منصوره, محمدی, پیام,

Background & Objectives: Excessive discharge of hazardous materials such as nitrogenous and organic compounds into the environment has negative impacts on the health of the aquatic environment. The main objective of this research was focused on evaluating the feasibility of using modified SBR reactor for the removal of nitrogenous compounds and chemical oxygen demand (COD). Materials & Methods:...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2012
abollfazl shakeri nourallah hazeri, jafar valizadeh esmail hashemi ali reza motavalizadeh kakhky

the aim of the present work was to investigate the ability of cocopeat to remove of lead (ii) from aqueous solutions. the effects of different parameters such as particle size, adsorbent dosage, ph, contact time, agitation speed and concentration on the removal process has been investigated. the maximum removal of lead ion (92.5%) took place in the ph range of 4 contact time in 30 minutes and i...

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