بررسی میزان نیکل، مس و آهن در رسوبات و میگو Macrobrachium nipponense در تالاب بین المللی آلاگل

نوع مقاله : مقاله پژوهشی

نویسنده

گروه علوم محیط زیست، دانشکده علوم پایه، دانشگاه مازندران، بابلسر، ایران

10.22034/aej.2020.129573

چکیده

آلاینده‌ های فلزی از طریق فرآیندهای مختلف طبیعی و انسان‌ زاد به محیط‌ های آبی و نیز جانداران آبزی وارد می‌ شوند. فلزات نیکل، مس و آهن به   علت خاصیت تجمع زیستی و پراکنش زیاد از آلاینده‌ های مهم محیط‌ های آبی محسوب می‌ شوند. از این‌ رو در مطالعه حاضر به بررسی میزان فلزات نیکل، مس و آهن در رسوبات و میگو Macrobrachium nipponense پرداخته شد. نمونه‌ های رسوب و میگو در سال 1390 از تالاب بین المللی آلاگل برداشت و به‌ روش هضم اسیدی آماده­ سازی شدند. میزان فلزات نیکل، مس و آهن با استفاده از دستگاه جذب اتمی تعیین و با استفاده از شاخص‌ های موجود ریسک ناشی از حضور این عناصر در رسوبات و میگو بررسی شد. میزان نیکل (2/1±94/16) و مس (67/72±14/3) در میگو M. nipponense از میزان‌ مجاز در فرآورده‌های غذایی تعیین شده توسط WHO تجاوز کرد اما شاخص سیبل خطر هدف عدم وجود خطر برای مصرف ­کنندگان آن را نشان داد. میزان فلزات نیکل (8/01±10/26)، مس (8/12±16/4) و آهن (43/85±107/22) در رسوبات پایین‌ تر از تعدادی از استانداردهای کیفیت رسوبات بود و هم­ چنین میزان شاخص‌ های ارزیابی ریسک رسوبات نشان از آلودگی بسیار پایین رسوبات به عناصر مورد مطالعه داشت. به‌ طورکلی مطالعه حاضر نشان داد که میزان فلزات نیکل، مس و آهن در منطقه مورد مطالعه در محدوده امنی قرار دارد و میزان آلودگی آن­ ها کم ­تر از حد خطر ساز و آلوده­ کننده است.

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