ارزیابی کیفیت آب تالاب چغاخور از نظر فلزات سنگین با استفاده از شاخص‏ های MI، HPI، HEI، Cd و IRWQIST

نوع مقاله : پژوهشی

نویسندگان

1 دانشجوی دکترای علوم و مهندسی آبخیز، دانشکدۀ منابع طبیعی و علوم زمین، دانشگاه شهرکرد

2 دانشیار گروه محیط زیست، دانشکدۀ منابع طبیعی و علوم زمین، دانشگاه شهرکرد

3 استادیار گروه علوم جنگل، دانشکدۀ منابع طبیعی و علوم زمین، دانشگاه شهرکرد

چکیده

به‏منظور حفظ پایداری اکولوژیکی و بیولوژیکی تالاب‏ها، باید درک صحیحی از محیط فیزیکی، بیولوژیکی و شیمیایی آنها داشت و وضعیت فلزات سنگین در آنها بررسی شود. هدف از مطالعۀ حاضر، بررسی آلودگی آب تالاب چغاخور به آرسنیک، مس، کروم، سرب، روی و کادمیوم با استفاده از شاخص‏های MI، HPI، HEI، Cd و IRWQIST طی فصل پاییز 1397 بود. نمونه‏برداری از آب سطحی در 10 ایستگاه انجام شده و میزان غلظت فلزات توسط دستگاه ICP-MASS سنجیده شد. نتایج محاسبۀ شاخص‏های آلودگی آب نیز نشان داد آب تالاب طبق شاخص MI در تمامی ایستگاه‏ها با مقدار 04/1 در طبقۀ آستانۀ خطر از نظر شرب و طبق شاخص HEI با مقدار 46/0 در طبقۀ آلودگی کم قرار گرفت. شاخص Cd نیز با مقدار 96/4- نشان‏دهندۀ آلودگی کم و HPI با مقدار 73/34 نشان‏دهندۀ عدم آلودگی آب تالاب به فلزات سنگین بودند. همچنین، طبق نتایج شاخص IRWQIST کیفیت آب در همۀ ایستگاه‏های ‏بررسی‌شده از نظر آلاینده‏های سمی با کمترین مقدار 4/76 در ایستگاه 1 و بیشترین مقدار 4/80 در ایستگاه 10 در محدودۀ وضعیت خوب این شاخص قرار داشتند. بنابراین، به طور کلی کیفیت آب تالاب چغاخور از نظر فلزات سنگین موجود در آب در وضعیت آلودگی کم قرار دارد که نیازمند توجه ویژه بر کیفیت آب این تالاب به‏منظور جلوگیری از آلودگی آن است.

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دوره 7، شماره 4
دی 1399
صفحه 1021-1031
  • تاریخ دریافت: 15 مرداد 1399
  • تاریخ بازنگری: 12 آبان 1399
  • تاریخ پذیرش: 12 آبان 1399
  • تاریخ اولین انتشار: 28 آذر 1399
  • تاریخ انتشار: 01 دی 1399