نتایج جستجو برای: such as initial concentration
تعداد نتایج: 6272104 فیلتر نتایج به سال:
Liquid membrane processes have attracted many interests in recent years for removal of heavy metals such as cadmium from industrial wastewaters. In this study, a modified hybrid liquid membrane system is introduced. The setup is worked by applying the water-insoluble dioctyl phthalate as the organic solvent. N-octanol and tetra butyl ammonium bromide are added to the organic phase to increase t...
background and purpose: generated dye wastewater by the textile industry is usually toxic, non-biodegradable and resistant in the environment. eggshell is one of the inexpensive material and for the reason the vesicular structures can be used as a proper adsorbent for pollutants removal. the aim of this study is to investigate the efficiency of eggshell for removal of acid orange 2 dye from aqu...
this thesis attempts to measure learning styles, self efficacy and intrinsic motivation as predictors of iranian ielts reading comprehension. in order to address this issue, a quantitative study was conducted on some randomly selected intact students at ferdowsi university. these two groups were assigned as they were undergraduate (ba=91) and graduate (ma =74) students; they were all aged betwe...
Introduction: Cadmium is a heavy metal with high toxicity and is best known as a carcinogen element. For protecting human health and environment it is necessary to remove excess Cadmium from industrial wastewater before discharging it to surface and ground water. In this study the efficiency of Zinc Oxides Nanoparticles in Cadmium removal from aqueous solution was evaluated. Methods: This is a...
One of the purposes of consciousness is to acquire knowledge. The models of this task traditionally assume a division between the known and the knower, a division that leads into doubtful reasoning about some kind of (frequently disguised) homunculus. The current paper tries to avoid such fallacies by viewing the adaptation of the mind as an evolutionary process, a process distinct (but not ind...
the paper examines industrial concentration in iranian food products and beverages industries using firm level data aggregated to the 4-digit isic industry level between 2002 and 2004. based on different concentration indices the average level of concentration has increased slightly for the period of study. the empirical results show that increase in the level of concentration is more likely in...
Background and purpose: Metronidazole is a serious environmental pollutant due to high consumption and persistence in biological degradation. This study aimed at removal of metronidazole using ozone (O3) activated persulfate (PS) in presence of ultrasound (US). Materials and methods: A laboratory scale study was carried out in batch reactor using US irradiation and O3 generator apparatuses. ...
Background and purpose: In oil and petrochemical industries, organic aromatic compounds such as furfural are produced on a large scale. They are degradable or act as a deterrent for biological systems. In order to generate sulfate radical (SO4), persulfate (S2O8-2, PS) is often activated by heat, UV irradiation and intermediate metals like iron ions. The aim of this study was to investigate the...
بررسی استفاده از فرآیند الکتروفنتون با الکترودهای آهن و گرافیت برای حذف مترونیدازول از محلول های آبی
Background : The indiscriminate consumption of antibiotics and their discharge into the environment have created serious complications. Therefore, it is necessary to remove these contaminants from the aquatic environment. The antibiotic Metronidazole is a contaminant that should be eliminated from the environment. The aim of this study was to evaluate the use of the Electro-Fenton advance...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید