نتایج جستجو برای: enrichment factor ef

تعداد نتایج: 892489  

زیرجانی‌زاده, صدیقه ,

Recently Gonabad, south of Khorasan Razavi Province,  in eastern Iran is affected by dust storm phenomena. To determine the physical and chemical characteristics of dust particles and their role in environmental pollution, 9 samples were collected for XRF, XRD, SEM and  EDX micro analysis. XRD analysis showed that most of mineralogical composition comprise tectosilicates (quartz and alkali feld...

Journal: :caspian journal of enviromental sciences 0

the concentrations of some heavy metals in sediment from the sinop coasts of the black sea were measured to monitor metal pollution in 2013. the distribution of the heavy metals in sediments of the black sea shows a variable pattern. the objectives of the present study were to elucidate the distribution heavy metals such as cu, pb, zn, ni, mn, fe, as, cd, cr, hg and co in sediment from sinop co...

E. Yesim Özkan H. Can Öztekin L. Bat

The concentrations of some heavy metals in sediment from the Sinop coasts of the Black Sea were measured to monitor metal pollution in 2013. The distribution of the heavy metals in sediments of the Black Sea shows a variable pattern. The objectives of the present study were to elucidate the distribution heavy metals such as Cu, Pb, Zn, Ni, Mn, Fe, As, Cd, Cr, Hg and Co in sediment from Sinop co...

ژورنال: سلامت و محیط زیست 2021

Background and Objective: Today, soil and water pollution with heavy metals is one of the major challenges around the world. The aim of this study is to investigate the contamination of soils around a lead and zinc mine. Materials and Methods: In the summer of 2019, 100 soil samples were taken from the mine vicinity and the characteristics of texture, acidity, salinity, calcium carbonate, orga...

Homira Agah, M.S. Hashtroudi, Willy Baeyens,

The concentrations of sixteen elements and organic carbon were determined in 78 marine sediment samples collected from the Iranian coastal waters of the Persian Gulf. Nine transects perpendicular to the coastline were sampled. Sixteen elements, including As, Ba, Cd, Co, Cu, Mn, Ni, Pb, Zn (trace metals) and Ca, Fe, Mg, Na, P, S, Si (major metals), were determined by Inductively Coupled Plasma M...

ژورنال: علوم آب و خاک 2020

Dusts contain heavy metals such as Pb, Zn, Cu, Cr, Cd and As that can threat humanchr('39')s health and environment. Therefore, the spatial distribution of heavy metals concentration and soil pollution monitoring and environmental quality protection seem to be essential. To assess heavy metals pollution level in Ahvaz street dust, 115 street dust samples were collected from main pedestrians. Th...

Journal: :Journal of Degraded and Mining Lands Management 2023

Abandoned iron ore mining soil was analyzed for its metal contamination. Pollution indices were calculated and used to examine the potential of area be polluted by metals. The samples collected in triplicate from ten sampling points spread throughout area. energy dispersive X-ray fluorescence (EDXRF) analytical method determine concentrations Cd, Cu, Co, Pb, Zn, Fe, Cr, Ni, Mn. order mean (mg/k...

Journal: :SSRG international journal of applied physics 2023

The study aimed to assess concentrations of heavy metals in soil samples on both sides along the three Niles (Blue, White, and Nile Rivers) Almogran area (Tuti Island) Khartoum city (the capital Sudan country) after overflow season. Concentrations Br, Cu, Ni, Pb, Co, Rb, Cr, Zn, Zr, Sr, Mn, Ti, K, Ca, Fe were determined using Xray fluorescence (XRF) techniques compatible with direct analysis s...

Journal: :محیط شناسی 0
علیرضا واعظی دانشجوی دکتری مهندسی محیط زیست- منابع آب دانشکدۀ تحصیلات تکمیلی محیط زیست دانشگاه تهران عبدالرضا کرباسی دانشیار مهندسی محیط زیست دانشکدۀ تحصیلات تکمیلی محیط زیست دانشگاه تهران مجتبی فخرایی کارشناس ارشد مهندسی محیط زیست- منابع آب دانشکدۀ تحصیلات تکمیلی محیط زیست دانشگاه تهران علیرضا ولی خانی سامانی کارشناس ارشد مهندسی محیطزیست – منابع آب دانشکده تحصیلات تکمیلی محیط زیست دانشگاه تهران مهدی حیدری کارشناس ارشد مهندسی محیط زیست- منابع آب دانشکدۀ تحصیلات تکمیلی محیط زیست دانشگاه تهران

introduction we can obtain useful information about aquatic systems by studying heavy metals in surface sediments. marine sediments can bring out the aquatic contamination. due to heavy metal toxicity, hard biodegradation and easy bioaccumulation in aquatic ecosystems, various indices have been developed such as sediment quality guidelines (sqgs), enrichment factor (ef), pollution load index (i...

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