تغییرات فصلی فلزات سنگین در آب های سطحی مناطق چهارگانه تالاب انزلی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه شیلات، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران

2 گروه شیلات، واحد لاهیجان، دانشگاه آزاد اسلامی، لاهیجان، ایران

3 مؤسسه تحقیقات علوم شیلاتی کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران

10.22034/aej.2022.357294.2867

چکیده

 آلودگی اکوسیستم های آبی به فلزات سنگین، تهدیدی برای سلامت و حیات آبزیان و به تبع آن، سلامت انسان است. این تحقیق به منظور بررسی میزان غلظت فلزات سنگین (مس، نیکل، سرب، کادمیوم و آهن) در آب تالاب انزلی صورت پذیرفت. به منظور اندازه گیری میزان فلزات سنگین در آب تالاب انزلی، نمونه گیری از چهار ایستگاه در طی چهار فصل (1399-1398) انجام شد. غلظت فلزات سنگین با استفاده از دستگاه طیف سنج اتمی پلاسما تعیین گردید. نتایج نشان دادند که میانگین غلظت سالانه فلزات مس، نیکل، سرب، کادمیوم و آهن به ترتیب 36/17±66/16، 12/25±16/61، 21/63±45/46، 7/24±15/51 و 26/80±75/44 میکروگرم در لیتر بود. روند نزولی غلظت فلزات در آب به صورت Fe>Cu>Pb>Ni>Cd به دست آمد. غلظت این فلزات در فصل زمستان و پائیز نسبت به فصول دیگر بیش تر بود. غلظت تمامی فلزات مورد بررسی پائین تر از استاندارد ملی ایران بود. در مقایسه با استانداردهای WHO و USEPA، میزان فلزات Cu، Ni و Fe پائین تر و میزان فلزات Pb و Cd بالاتر از این استانداردها بود. بر اساس نتایج این بررسی، میزان فلزات سنگین در مناطق مورد بررسی بسیار کم بوده که نشان دهنده عدم آلودگی جدی در منطقه می باشد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

seasonal changes of heavy metals in surface waters of the four areas of Anzali Wetland

نویسندگان [English]

  • Maryam Pedram Jarf 1
  • Abolghasem Kamali 1
  • Hossein Khara 2
  • Nima Pourang 3
  • Pezhman Hosseini Shokrabi 1
1 Department of Fisheries, Science and Research Branch, Islamic Azad University, Tehran, Iran
2 Department of Fisheries, Lahijan Branch, Islamic Azad University, Lahijan, Iran
3 Iranian Fisheries Science Research Institute, Agriculture Research Education and Organization, Tehran, Iran
چکیده [English]

Contamination of aquatic ecosystems with heavy metals is a threat to the health and life of aquatic animals and, as a result, human health. This research was conducted to investigate the concentration of heavy metals (copper, nickel, lead, cadmium and iron) in Anzali Wetland. In order to measure the amount of heavy metals in Anzali Wetland, sampling was done from four stations during four seasons (2019-2020). The concentration of heavy metals was determined using a plasma atomic spectrometer. The results showed that the average annual concentrations of Cu, Ni, Pb, Cd and Fe in water were 66/16±36/17, 16/60±12/25, 45/46±21/63, 15/51±7/24 and 75/43±26/80 μg/L, respectively. The decreasing trend of metal concentration in water was obtained as Fe>Cu>Pb>Ni>Cd. The concentration of these metals was higher in winter and autumn compared to other seasons. The concentration of all the investigated metals was lower than the national standard of Iran. Compared to WHO and USEPA standards, the amount of Cu, Ni and Fe metals was lower and the amount of Pb and Cd metals was higher than these standards. Based on the results of this survey, the amount of heavy metals in the surveyed areas is very low, which indicates the absence of serious pollution in the area.

کلیدواژه‌ها [English]

  • Anzali Wetland
  • Heavy metals
  • Surface waters
  • Seasonal changes
  • Metal Pollution Index

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فصلنامه محیط زیست جانوری
دوره 15، شماره 1
خرداد 1402
صفحه 279-284

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