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.

کلیدواژه‌ها


عنوان مقاله [English]

Water Quality Assessment of the Choghakhor Wetland for Heavy Metals Using MI, HPI, HEI, Cd and IRWQIST Indices

نویسندگان [English]

  • Samira Bayati 1
  • Rasool Zamani Ahmadmahmoodi 2
  • Davood Mafi Gholami 3
1 PhD Student in Watershed Science and Engineering, Faculty of Natural Resources and Earth Sciences, Shahrekord University, Iran
2 Associate Professor of Environmental Sciences, Faculty of Natural Resources and Earth Sciences, Shahrekord University, Iran
3 Assistant Professor of Forest Sciences, Faculty of Natural Resources and Earth Sciences, Shahrekord University, Iran
چکیده [English]

In order to maintain the ecological and biological sustainability of wetlands, it is necessary to have a proper understanding of their physical, biological and chemical environment and to investigate the status of heavy metals in them. The purpose of this study was to investigate the contamination of Choghakhor wetland with arsenic, copper, chromium, lead, zinc and cadmium using MI, HPI, HEI, Cd and IRWQIST indices during autumn 2018. Surface water sampling was performed in 10 stations and the concentration of metals was measured by ICP-MASS. The results of calculation of water pollution indices also showed that the wetland water was within the danger threshold class in terms of drinking according to MI index in all of the stations with a value of 1.04 and within the low pollution class according to HEI index with a value of 0.46. Cd index showed low pollution with a value of -4.96 and HPI showed that wetland water was not polluted with heavy metals with a value of 34.73. Also, according to the results of IRWQIST index, water quality was within the good condition of this index in all studied stations in terms of toxic pollutants with the lowest value of 76.4 in station 1 and the highest value of 80.4 in station 10. Therefore, the water quality of Choghakhor wetland was within the low pollution condition in terms of heavy metals in the water, which requires special attention to the water quality of this wetland in order to prevent further pollution.

کلیدواژه‌ها [English]

  • Choghakhor Wetland
  • Water pollution indices
  • Heavy metals
  • Water quality
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