نتایج جستجو برای: cu and cd concentrations were measured using an icp

تعداد نتایج: 18077280  

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده علوم انسانی 1390

this study investigated the effects of manipulating the cognitive complexity of tasks along +/- few elements and the time limits on l2 learners writing performance. to conduct the study, 60 iranian efl learners with two levels of proficiency, low and high intermediate, were selected and assigned to three groups based on the time devoted to task completion. the participants performed both a simp...

Journal: :Pertanika journal of tropical agricultural science 2023

This study measured the accumulation of cadmium (Cd), lead (Pb), and copper (Cu) in Brassica juncea grown using hydroponic method a water environment contaminated with these heavy metals. The accumulated metal content each part plant was monitored after one, three, six weeks exposure. concentrations Cd, Cu, Pb biomass B. were determined atomic absorption spectroscopy. results showed that pollut...

Journal: :محیط زیست طبیعی 0
منوچهر خزاعی دانشجوی کارشناسی ارشد، گروه مهندسی محیط زیست، دانشکدۀ منابع طبیعی دانشگاه تهران، کرج، ایران امیر حسین حمیدیان استادیار گروه مهندسی محیط زیست، دانشکدۀ منابع طبیعی دانشگاه تهران، کرج، ایران افشین علیزاده شعبانی استادیار گروه مهندسی محیط زیست، دانشکدۀ منابع طبیعی دانشگاه تهران، کرج، ایران سهراب اشرفی استادیار گروه مهندسی محیط زیست، دانشکدۀ منابع طبیعی دانشگاه تهران، کرج، ایران سید علی اصغر میرجلیلی کارشناس ارشد بهداشت، ایمنی و محیط زیست، شرکت ملی صنایع مس ایران، طرح معادن مس تفت عصمت اسمعیل زاده پژوهشگر محیط زیست، مجتمع مس سرچشمه، امور تحقیق و توسعه

rodents are sensitive species to and proper monitors of heavy metals in the environment. the accumulation of copper (cu), zinc (zn) and chrome (cr) were measured by wet digestion method and using an icp-oes instrument in hair and liver of persian jird (meriones persicus) in darreh zereshk copper mine, yazd without considering the effects of surrounded mines. results indicated that the concentra...

2015
JOSEPH BIDAI

Heavy metals concentrations in bivalve Psammotaea elongata from five sampling sites in Semerak Lagoon were determined by ICP-MS. The mean concentrations of Cd, Cu, Pb, Fe and Zn were 0.18, 4.42, 1.15, 1.47 and 46.35 μg/g in total soft tissue; 0.68, 20.08, 5.29, 85.5 and 9.06 μg/ g in stomach; 0.7, 17.05, 4.39, 84.15 and 8.62 μg/g in leg; 0.74, 15.19, 4.4, 80.69 and 8.6 μg/g in ligament, respect...

Water and sediment samples have been collected from five different stations, located along Djendjen River between February and June, 2016 so that the concentrations of Cd, Ni, Zn, and Cu could be determined. The extent of the sediment pollution has been assessed, using the multiple pollution indices, namely Contamination Factor (CF), Pollution Load Index (PLI), and the geoaccumulation index (Ig...

Journal: Pollution 2018

Water and sediment samples have been collected from five different stations, located along Djendjen River between February and June, 2016 so that the concentrations of Cd, Ni, Zn, and Cu could be determined. The extent of the sediment pollution has been assessed, using the multiple pollution indices, namely Contamination Factor (CF), Pollution Load Index (PLI), and the geoaccumulation index (Ig...

2016
M. A. Jasim Aldoghachi M. Motior Rahman I. Yusoff M. Sofian-Azirun

Juvenile hybrid tilapia (Oreochromis sp.) was tested with different concentration of heavy metals under varying exposure time to examine acute toxicity effect on their survival rate and bioaccumulation in fish tissues. Copper (Cu), cadmium (Cd) and zinc (Zn) was used at rates 0.0, 0.50, 1.0, 3.0 and 5.0 mg L-1. The medial lethal concentration of Cu, Cd and Zn (96h LC50) was determined to be 0.4...

Journal: :محیط زیست طبیعی 0
مائده چیت ساز دانشجوی دانشگاه تهران امیرحسین حمیدیان دانشیار گروه محیط زیست پردیس کشاورزی و منابع طبیعی دانشگاه تهران بابک متشرع زاده دانشیار گروه خاکشناسی پردیس کشاورزی و منابع طبیعی دانشگاه تهران سیدعلی اصغر میرجلیلی کارشناس ارشد hse طرح معادن مس تفت – شرکت ملی صنایع مس ایران سهراب اشرفی استادیار گروه محیط زیست دانشگاه تهران، دانشکده منابع طبیعی عصمت اسماعیل زاده پژوهشگر محیط زیست، امور تحقیق و توسعه مجتمع مس سرچشمه –شرکت ملی صنایع مس ایران

pollution of agricultural lands is a widespread problem in mine regions. the transport of the pollutants through the food chain, causes their accumulation s in tissues of plants and animals which endangers their health. this study aimed to measure the concentrations of heavy metals (lead, copper, zinc and manganese) in wheat roots of darreh zaresh villages which might be used for future environ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده علوم پزشکی 1389

introduction: diabetes mellitus is an growing national and international public health concern. the number of people affected by diabetes in world by 2030 will be 69% in developing countries. regular physical activity plays a key role in the management of type 2 diabetes melitus, particularly glycemic control. it has been recommended that peoples with type 2 diabetes participate in moderate-int...

Journal: :Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA 2008
Ksawery Kuligowski Tjalfe G Poulsen Peder Stoholm Niels Pind Jens Laursen

Ash from pig manure treated by combustion and thermal gasification was characterized and compared in terms of nutrient, i.e., potassium (K), phosphorus (P) and heavy metal, i.e., cadmium (Cd), chromium (Cr), copper (Cu), nickel (Ni) and zinc (Zn) contents. Total nutrient and metal concentrations were measured using energy dispersive X-ray fluorescence analysis. Acid (HNO3, H2SO4) and water-extr...

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