تغییرات فصلی فلز سرب در آب، رسوب و اندام‎های مختلف ماهی کفال (Liza aurata)، تالاب گمیشان

نوع مقاله : مقاله کوتاه

نویسندگان

دانشکده کشاورزی و منابعطبیعی، واحد آزادشهر، دانشگاه آزاد اسلامی، آزادشهر، ایران

چکیده

این پژوهش با هدف تعیین سطح فلز سنگین سرب در آب، رسوب و ماهی کفال در تالاب گمیشان انجام شد. نمونه‎برداری این پژوهش در تالاب گمیشان و در سه نقطه ابتدایی، میانی و انتهایی تالاب انجام شد. نمونه‎ها در دو فصل تابستان و زمستان برداشت و تعداد نمونه‎ها شامل 3 تکرار برای هر نقطه و در هر مرحله بود. برای آنالیز سرب از دستگاه جذب اتمی با کوره گرافیتی استفاده شد. بر اساس نتایج مقایسه میانگین مقدار سرب در آب، رسوب و ماهی اختلاف معنی‎دار را نشان داد (05/0>p) به‎طوری‏که در هر دو فصل مقدار این عنصر در رسوب نسبت به ماهی بیشتر و مقدار سرب ماهی از آب بیشتر بود (رسوب>ماهی >آب). هم‎چنین مقایسه میانگین مقدار سرب در ایستگاه‏های نمونه‏برداری اختلاف معنی‏داری را نشان داد (05/0>p) و ایستگاه مختوم قلی بالاترین میزان سرب را در رسوبات نشان داد. نتایج مقایسه میانگین مقدار سرب در اندام‏های آبشش، کبد و عضله اختلاف معنی‏داری را نشان داد (05/0>p) به طوری‏که در دو فصل مورد بررسی مقدار این عنصر در آبشش نسبت به عضله بیشتر و مقدار سرب عضله از کبد بیشتر بود (آبشش>عضله>کبد). هر چند مقادیری از سرب در عضله مشاهده شد اما این مقدار از حد استاندارد‏های جهانی بهداشت و سلامت پایین‏تر بود و سلامت مصرف‏کنندگان را در حال حاضر، تهدید نمی‏کند.

کلیدواژه‌ها


عنوان مقاله [English]

Seasonal Variation of Heavy Metal (Pb) in Fish (Liza aurata), Sediment and Water Samples from the Gomishan Wetland

نویسندگان [English]

  • Zeid Ahmadi
  • Akbar Yazdi
  • Reza Akrami
Faculty of Agriculture and Natural Resources Azadshar branch, Islamic Azad University, Azadshahr, Iran
چکیده [English]

The pollution of aquatic ecosystems with heavy metals has always been a major concern for the aquatic organisms and human health. Measuring the levels of contaminants such as heavy metal (Pb) accumulated along the food chain (fish) and then transmitted to the human body is of particular interest. Concentrations of heavy metal (Pb) were measured in the water, sediment and fish species (Liza aurata) from the Gomishan Wetland, Iran. Samples of water, sediment and fish were collected during two periods: summer (2013) and winter (2014). The result revealed thatPb concentration was varied significantly among sediment, water and fish body, the average Pb concentrations in sediment, water and fish in both seasons was in the order sediment > fish >water, Pb concentration was varied significantly among gills, liver and muscle tissues of fish samples in any station and in both seasons was in the order gill > muscle >liver. These values were lower than the established standard for aquatic environment by W.H.O and F.A.O. The results indicated that the consumer of fish and water from the stream is not at risk of being poison by this metal.

کلیدواژه‌ها [English]

  • Heavy Metal
  • Liza aurata
  • Pollution of Aquatic
  • Gomishan Wetland
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