ارزیابی شاخص‌های آلودگی فلزات سنگین در کاربری‌های مختلف از آب تالاب میقان اراک

قدیمی, فریدون

ارزیابی شاخص‌های آلودگی فلزات سنگین در کاربری‌های مختلف از آب تالاب میقان اراک

نویسنده

فریدون قدیمی

دانشگاه صنعتی اراک

چکیده

تالاب میقان اراک، حوضه‌ی بسته در مرکز آبخیز اراک بوده که کلیه‌ی رواناب‌ها و آب‌های زیرزمینی به آن هدایت می‌شوند. شهرهایی چون اراک و آشتیان، شهرک‌های صنعتی چون اراک، خیرآباد، ایبک‌آباد و نیز فعالیت‌های بزرگ کشاورزی در بالادست تالاب میقان واقع شده و فاضلاب و پساب حاوی فلزات سنگین آن‌ها وارد تالاب می‌شوند. به‌علاوه، تالاب میقان دارای جاذبه‌های اکوتوریستی؛ یعنی پرندگان مهاجر و نیز ژئوتوریستی از نظر معدن سولفات سدیم است. جهت مشخص شدن شدت آلودگی آب تالاب میقان اراک به فلزات سنگین و تعیین منابع آلاینده‌ی در آن، 29 نمونه آب از کاربری‌های آب شور شامل حوضچه‌ها، دریاچه‌ی میقان و پساب شرکت املاح ایران و آب شیرین ورودی به تالاب نظیر فاضلاب شهری، آب کشاورزی، پساب صنایع برداشت و غلظت عناصر سنگین نظیر Hg، As،Pb،Co،Cu، Pb و Zn با دستگاه جذب اتمی تعیین گردید. مقایسه‌ی این عناصر با استاندارد شرب بین‌المللی حاکی از مطلوب بودن آب تالاب بود؛ اما ارزیابی شاخص فلزی و آستانه‌ی آلودگی نشان داد که تالاب آلوده به عناصری چون Hg، As و Pb بوده که مهم‌ترین منابع آلاینده‌ی آن به ترتیب فاضلاب شهری و پساب کشاورزی است.

کلیدواژه‌ها

پهنه‌بندی فلزات سنگین

منابع آلاینده

سنجش آلایندگی

تالاب میقان

اراک

عنوان مقاله English

Evaluation of heavy metal contamination indices in different uses of water in Mighan Arak wetland

نویسنده English

Fridon Ghadimi

چکیده English

Mighan Arak wetland is a closed area where all runoff and groundwater are directed to the wetland. Major cities such as Arak and Ashtian, industrial towns such as Arak, Khairabad and Aibak Abad, as well as large agricultural activities are located in upstream of wetland and sewage and wastewater containing heavy metals enter the Mighan wetland.In addition, the Mighan wetland has ecotourism attractions, as migratory birds as well as geo-tourists as the sodium sulfate mine. To determine the severity of contamination of pollutant metals and contaminant sources in Mighan wetland, water samples were taken from saline water applications including ponds, Mighan lake and Amlah company sewage and freshwater inputs to wetland such as municipal wastewater, water agriculture.Concentrations of toxicants such as Hg, As, Pb, Co, Cu, Pb and Zn were determined by atomic absorption. Comparison of these elements with the international drinking water standard indicates that the wetland is desirable. But evaluation of pollution indices, contamination degree and contamination threshold showed that the wetland was contaminated with elements such as Hg, As and Pb. The most important sources of contaminants being municipal wastewater and agricultural effluent.

کلیدواژه‌ها English

heavy metals

Water Pollutants

Pollution indicators

Mighan wetland

Arak

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