نتایج جستجو برای: index enrichment factor

تعداد نتایج: 1241533  

ژورنال: بوم شناسی آبزیان 2017

Mercury (T-Hg), as the most toxic Trace metal, can have adverse effects on the environment. In this study, the concentrations of T-Hg were investigated in surface sediments of higher and lower tidal zones of Hormozgan province coasts including the stations of Shahr Jask, Ariyan International Wetland Lagoon, Khorgorsuzan Bandar Abbas, Bostono Industrial Zone, Coastal Park of Khumir, Shahrbonderl...

Bakand, Shahnaz, Ghazi Khansari, MMahmood, Koohi, Mohammad Kazem, Menhaje-Bena, Rabee, Modabberi, Soroush,

Introduction: Particulate matter (PM) is known as the most common cause of air pollution in the world. Activities of sand quarries are known as one of the emission sources in Tehran. This study aimed at investigating the geological and environmental factors of airborne particles in an active quarry in the west of Tehran. Material and Methods: Three methods of dust sampling were used. totally, ...

Journal: :محیط شناسی 0
کبری جعفری دانش آموخته ی زمین شناسی زیست محیطی دانشگاه پیام نور مشهد ناصر حافظی مقدس عضو هیئت علمی گروه زمین شناسی دانشگاه فردوسی مشهد علیرضا مظلومی عضو هیئت علمی گروه زمین شناسی دانشگاه پیام نور مشهد اعظم قزی دانش آموخته ی دکترای زمین شناسی مهندسی دانشگاه فردوسی مشهد

introduction landfilling sites of wastes including big volume of waste. in recent years lack correct management caused that landfilling sites of municipal waste taken as one of main source pollution effluence at environmental. from between diverse contaminants heavy metals because of environmental stability, biogeochemical process, poison biology, sorption and desorption, redox potential, sedim...

2017
Longfeng Wang Jun Xia Jingjie Yu Liyuan Yang Chesheng Zhan Yunfeng Qiao Hongwei Lu

Nansi Lake has been seriously affected by intensive anthropogenic activities in recent years. In this study, an extensive survey on spatial variation, pollution assessment as well as the possible sources identification of major nutrients (Total phosphorus: TP, Total nitrogen: TN, and Total organic carbon: TOC) in the surface sediments of Nansi Lake was conducted. Results showed that the mean co...

Journal: :international journal of advanced biological and biomedical research 2014
n s.a. igwe n.n. nwobodo

objective: newbouldia laevis seem, is an ubiquitous perennial plant belonging to the family bignoniaceae with varying applicability in ethnomedicine. methods: the anticonvulsant effect of the aqueous extracts of root and stem bark preparations was undertaken using standard techniques. results: results showed that the ld50 in mice was 489.8mg/kg body weight while 5.6mg/kg body weight protected m...

مقایسه شاخص‌های غنی‌شدگی، ریسک اکولوژیکی، بار آلودگی و ضریب واگرایی به منظور برآورد آلودگی فلزات سنگین در گرد و غبار نیمه غربی ایران     مهدی رجبی1، بابک سوری*2   1 دانش آموخته کارشناسی ارشد گروه محیط‌زیست، دانشکده منابع‌طبیعی، دانشگاه کردستان، س...

Journal: :Marine pollution bulletin 2013
Guogang Li Bangqi Hu Jianqiang Bi Qinuan Leng Chunqiao Xiao Zhongcheng Yang

Selected heavy metals (Cr, Cu, Ni, Pb and Zn) in surface sediments from the coastal Shandong Peninsula (Yellow Sea) have been determined to evaluate the spatial distribution and potential ecological risk. Results showed that heavy metal concentrations in the sediments generally met the criteria of China Marine Sediment Quality. However, both the enrichment factor (EF) and geoaccumulation index ...

Ghanavati , N *, Kaydan , Z, Nazarpour , A,

Background & objectives: Heavy metals in urban parks are one of the most important indicators of urban pollution, as children playing in the park can readily be affected. This research was conducted to evaluate the environmental pollution of some heavy metals in Ahvaz parks. Methods: To this end, 26 sampling stations were selected from 20 parks in Ahvaz city and the soil samples were analyzed b...

Journal: :Acta Radiologica 1957

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