نتایج جستجو برای: pollution load index pli of studied heavy metals was calculated afterwards
تعداد نتایج: 21246451 فیلتر نتایج به سال:
Background: Heavy metals due to their ecological risks and high toxicity to living organisms are considered as one of the most dangerous pollutants. Therefore, the present study was conducted to investigate the level of pollution, toxicity and the ecological risks of heavy metals in the coastal surface sediments of Bushehr province using systematic review. Methods: To conduct this review study,...
Background and Objective: Street dust is considered as one of the important sources of particulate matters and heavy metals in the atmosphere. The goal of this study was to assess the heavy metals pollution in street dust of Tehran and evaluate their ecological risk. Materials and Methods: The sampling of street dust was carried out in two areas at the east and west of Tehran. After preparatio...
در سالیان اخیر پدیده حزن انگیز گرد و غبار گاها آسمان غرب ایران را اشغال کرده و زندگی مردم را تحت تاثیرات زیانبار خود قرار داده است. پدیده گرد و غبار که به عنوان مهمترین معضل زیست محیطی کشور در دهه اخیر قلمداد می شود واجد طیف وسیعی از خسارات و اثرات منفی است که باعث گردیده این موضوع از یک شکل محلی به بحرانی بین المللی تبدیل شود. این پایان نامه به مقایسه خصوصیات فیزیکوشیمیایی ذرات گرد و غبار در...
background: soil and sediment serve as major reservoir for contaminants as they possess ability to bind various chemicals together. in this study the concentrations of heavy metals cd, cr and cu were analyzed in surface sediments of agh gel wetland in west of iran. methods: the sediment samples were taken from 10 stations. the samples were subjected to bulk digestion and chemical partitioning a...
Background and Objectives: Chemical storage of water cannot provide complete information about the extent of bioavailability of metals in the environment, while the study of this storage in the chain of water, sediment and macrobenthos can make the rate of rotation and storage risk more visible in ecosystems. Hur Al-Azim wetland is located in the west of Khuzestan Province. Large parts of it ha...
Heavy metals tend to be adsorbed and accumulated in sediments as opposed to water or suspended solids. Sediments and biota bodis can act as a final sink for heavy metals in the aquatic environments. They accumulate through the food chain posing potential biological and ecological risks. Therefore, research on the heavy metal concentrations in aquatic ecosystems can help to protect human health ...
The objective of this study was to establish contamination level for, Pb, Zn, Cu, Ni, Cr, As, Hg, Sb, Co, and Cd in soils around the old Hg mine area central part Turkey. 34surface samples from were collected. Samples digested metals determined by ICP-OES assess metal using Enrichment factor (EF), (Cf), Geoaccumulation index (Igeo), hazard quotient (HQ) (individual metal), (Cd), modified (mCd),...
In the last three decades, the industrial and human activities in the coastal area of Saudi Arabia have increased dramatically and resulted in the continuous invasion of different types of pollutants including heavy metals. Seven sediment cores were collected from three major industrialized areas; Jeddah, Rabigh and Yanbu, along the coast of Saudi Arabia to determine the spatial and temporal di...
The water quality of the Persian Gulf is influenced by various industrial and urban discharges. The study area is a small linked estuary with the Straits of Hormuz in the Persian Gulf. This study was conducted to evaluate anthropogenic assessment, pollution status and potential ecological risk of some heavy metals (Pb,Ni, Zn, and Fe) in intertidal surface sediments of a mangrove estua...
background: this study aimed to evaluate the pollution levels of surface water with heavy metals including pb, cd and cr in gheshlagh river, western iran. methods: water and sediment were sampled in five monitoring stations with three replicates in time along the river. the concentration of cr, pb and cd in both water and sediment samples were measured with graphite furnace atomic absorption sp...
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