نتایج جستجو برای: zn and ni than cu and pb in sediment 3 and 4 distill water mobilized more pb and cu than cd

تعداد نتایج: 22169480  

روان خواه, ندا, معصوم, سعید, میرزایی, روح اله,

Background and purpose: Soil heavy metal contamination is a major environmental concern. Contaminants in urban soils can directly pose significant human health risks through oral ingestion, particle inhalation, and dermal contact. The purpose of this study was to determine the health risk of heavy metals in surface soils in Aran-Bidgol, Iran. Materials and methods: A descriptive cross-sectio...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیخ بهایی - دانشکده زبانهای خارجی 1391

simplification universal as a universal feature of translation means translated texts tend to use simpler language than original texts in the same language and it can be critically investigated through common concepts: type/token ratio, lexical density, and mean sentence length. although steps have been taken to test this hypothesis in various text types in different linguistic communities, in ...

Journal: :international journal of environmental research 2014
m. aktaruzzaman m.a.z. chowdhury z. fardous m.k. alam m.s. hossain

pollution of water and soils by heavy metals is an emerging problem in industrialized countries.the present study was conducted to investigate the heavy metals concentration in water and sedimentsamples from ship breaking sites of sitakunda to assess the potential ecological risk posed by heavy metalusing different methods. heavy metals concentration was analyzed by atomic absorption spectrosco...

ژورنال: سلامت و محیط زیست 2017

Background and Objective: Street dust is consisting of solid particles with complex compositions which can be an appropriate indicator to determine urban environmental contamination. Therefore, the purpose of this study was to determine spatial patterns and heavy metals contamination in the street dusts of Kashan.    Materials and Methods: A total of 48 urban street dust samples were collect...

Kheirabadi Kheirabadi, Ali Kazemi, Alireza Riyahi Bakhtiari, Asma Mohammad Karami,

Background: Persian Gulf is a semi-closed environment which is affected by pollution ‎from heavy metals. Entrance of heavy metals to the water column and binding to ‎sediment particles can affect the benthic organisms that can accumulate these ‎materials in their body. Noticing this ability, mussels are considered as bio-monitoring ‎agents.‎ Methods: The pearl oyster, Pinctada radiate, and sed...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده زبانهای خارجی 1389

the aim of the present study was to investigate the frequency and the type of discourse markers used in the argumentative and expository writings of iranian efl learners and the differences between these text features in the two essay genres. the study also aimed at examining the influence of the use of discourse markers on the participants’ writing quality. to this end the discourse markers us...

a bazzi

Levels of the heavy metals Copper (Cu), Zinc (Zn), Lead (Pb), Cadmium (Cd), Chromium (Cr), Nickel (Ni), Iron (Fe) and Manganese (Mn) were determined by graphite furnace atomic absorption spectrophotometer (Model 67OG) in coastal water, sediments and soft tissues of the Saccostrea cucullata, from the intertidal zone at five stations in the Gulf of Chabahar on the Iranian coasts along the Oman Se...

2014
Saeed Shanbehzadeh Marzieh Vahid Dastjerdi Akbar Hassanzadeh Toba Kiyanizadeh

This study was carried out to examine heavy metals concentration in water and sediment of upstream and downstream of the entry of the sewage to the Tembi River, Iran. Samples were collected from upstream and downstream and were analyzed for Cd, Cr, Cu, Fe, Pb, Ni, and Zn by atomic absorption spectrophotometer. The results indicated that the average concentration of the metals in water and sedim...

پایان نامه :0 1392

it is definitely necessary to understand the concept and behavior of causation of life insurance policies and its determinants for insurance managers, regulators, and customers. for insurance managers, the profitability and liquidity of insurers can be increasingly influenced by the number of causation through costs, adverse selection, and cash surrender values. therefore, causation is a materi...

Journal: :iranian journal of toxicology 0
علی کاظمی ali kazemi department of environmental sciences, tarbiat modares university, noor, mazandaran, iran. علیرضا ریاحی بختیاری alireza riyahi bakhtiari department of environmental sciences, tarbiat modares university, noor, mazandaran, iran. اسما محمدکرمی asma mohammad karami department of marine biology sciences, tarbiat modares university, noor, mazandaran, iran. بهنام حیدری behnam haidari department of environmental pollution, science and research branch, islamic azad university, khouzestan, iran. نبی اله خیرآبادی nabiallah kheirabadi department of marine biology sciences, tarbiat modares university, noor, mazandaran, iran.

background: marine pollution is a global environmental problem that its monitoring by ideal biomonitors is of great importance. marine organisms, especially mussels, have the ability to accumulate metals from the environment they can be considered as a biomonitoring agent. methods: in this study, concentrations of heavy metals were measured in saccostrea cucullata collected from seven sites on ...

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