heavy metal contamination in the sediments of anzali international wetland, northern iran based on type regional development

نویسندگان

saeed ganjali msc in environmental sciences, young researchers and elite club, hamedan branch, islamic azad university, hamedan, iran.

amin ghasemi department of environmental sciences, isfahan university of technology, isfahan, iran.

چکیده

background: the most important factors and problems threatening the anzali wetland are the contaminant load and sediments entering the wetland, as well as lack of an integrated management plan for this wetland. the main objectives of the current research were to explore whether there are significant differences in concentrations of zn, cd, and pb in surface sediments among different sites (based on type region development) of the anzali wetland, northern iran. methods: through a field study, samples were collected from 10 stations based on the type of regional development and contaminant source inputs of anzali wetland in 2015. using a hot-block digester, the sediment samples were digested with a 4:1 combination of nitric acid (hno3) and perchloric acid (hclo4) for one hour at 40 °c, followed by 3 h at 140 °c. afterwards, samples were filtered with whatman 42, filter paper and the filtrate was kept in polyethylene containers at 4 °c, until analysis by atomic absorption spectrometry (aas). results: mean ± sd levels of metals in the sediments of different stations were 26.7 ± 3.49 (lead), 4.36 ± 0.47 (cadmium), and 88.44 ± 10.06 (zinc) μg g-1 dw. there was a significant difference between the stations of the wetland (p < 0.05). this difference could be due to the variations in the input of contaminant sources into the anzali wetland. conclusions: the areas, affected by urban and industrial developments, had the highest level of contamination while the agricultural and less-developed areas had the lowest level of contamination, and therefore, protective plans must be implemented in developed areas in order to lower the level of heavy metals.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Heavy Metal Contamination in the Sediments of Anzali International Wetland, Northern Iran Based on Type Regional Development

Background: The most important factors and problems threatening the Anzali Wetland are the contaminant load and sediments entering the wetland, as well as lack of an integrated management plan for this wetland. The main objectives of the current research were to explore whether there are significant differences in concentrations of Zn, Cd, and Pb in surface sediments among different sites (base...

متن کامل

Investigation of Heavy Metal Contamination in the Surface Sediments of Anzali wetland in North of Iran

Over the last few decades, Anzali wetland has been at risk of pollutants, especially from heavy metals. The present research analyzes some physical and chemical properties and heavy metals concentration in 27 points in nine stations of Anzali wetland. The samples of each station have been mixed, acidic digested, and analyzed by inductively coupled plasma mass spectrometry (ICP-MS). The mean con...

متن کامل

Investigation of Heavy Metal Contamination in the Surface Sediments of Anzali wetland in North of Iran

Over the last few decades, Anzali wetland has been at risk of pollutants, especially from heavy metals. The present research analyzes some physical and chemical properties and heavy metals concentration in 27 points in nine stations of Anzali wetland. The samples of each station have been mixed, acidic digested, and analyzed by inductively coupled plasma mass spectrometry (ICP-MS). The mean con...

متن کامل

source of heavy metal pollutions in the sediments of the anzali wetland in northern iran

abstruct anzali wetland in north of guilan provience is an international important wetland that is recorded in ramsar convension. pollution is one of the major problems facing this wetland. in order to investigate the pollution situation, sediment core samples were taken in 7 stations in 4 districts within the wetland, namely abkenar, siakishom, hendekhale and shijan). elements were determined ...

متن کامل

Magntic susceptibility as a proxy to heavy metal content in the sediments of Anzali wetland, Iran

Heavy metal concentrations and magnetic susceptibility of sediment samples were analyzed as indicators of urban and industrial contamination in Anzali wetland in Gilan, Iran. The aim was to investigate the suitability of magnetic properties measurements for indicating heavy metal pollution. The concentration of six heavy metals (Ni, Cr, Cd, Zn, Fe, and Pb) was determined in different depths of ...

متن کامل

Evaluation of Heavy Metal Pollution in Anzali Wetland, Guilan, Iran

Background: Evaluation of heavy metals as toxic pollutants in environment has a significant importance in environmental pollution studies. surficial sediments of water resources have a high potential in releasing heavy metals to the upper water environment, hence sediment analysis presents guidelines to the authorities for monitoring the environmental systems. Methods: In this study, total an...

متن کامل

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
iranian journal of toxicology

جلد ۱۰، شماره ۵، صفحات ۱-۶

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023