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پهنه بندی غلظت و ارزیابی ریسک اکولوژیک فلزات سنگین در رسوبات تالاب میقان | ||
| اکوهیدرولوژی | ||
| مقاله 20، دوره 4، شماره 2، تیر 1396، صفحه 533-545 اصل مقاله (419.35 K) | ||
| نوع مقاله: پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/ije.2017.61490 | ||
| نویسندگان | ||
| ثمر مرتضوی* 1؛ فائزه صابری نسب2 | ||
| 1استادیار، دانشکدۀ منابع طبیعی و محیط زیست، دانشگاه ملایر | ||
| 2دانشجوی کارشناسی ارشد آلودگی‌های محیط زیست، دانشکدۀ منابع طبیعی و محیط زیست، دانشگاه ملایر | ||
| چکیده | ||
| با افزایش بی‌رویۀ جمعیت و در پی آن توسعۀ صنایع آلایندههای بسیاری وارد محیط زیست شده است. بدین‌منظور بومسازگانهای آبی بیشتر در معرض مواد شیمیایی با ترکیبات مختلف بهویژه عناصر سنگین قرار دارند. در پژوهش حاضر آلودگی رسوبات اطراف حوضچۀ آبگیر تالاب میقان به فلزات سنگین سرب، روی و مس به کمک روش هضم اسیدی و با دستگاه جذب اتمی بررسی شد و شاخصهای ضریب آلودگی (CF) و ریسک اکولوژیک (RI) محاسبه شد. با توجه به نتایج به‌دست‌آمده، مقایسه با استاندارد کیفیت رسوب (SQGs) صورت پذیرفت. در نهایت، پهنهبندی فلزات به کمک برآورد تراکم کرنل نشان داد بخشهای جنوبی و غربی این تالاب بهعلت استقرار شهرکهای صنعتی و پسابهای زمینهای کشاورزی تمرکز زیادی از آلایندهها دارد. همچنین بررسی فلزات سنگین بیان‌کنندۀ غلظت زیاد فلز مس (۱۸/۳۸ میکروگرم بر گرم) نسبت به عناصر روی (۵۷/۱۱ میکروگرم بر گرم) و سرب (۸۲/۹ میکروگرم بر گرم) در منطقه بود. در پایان، لزوم کنترل آلایندههای موجود در تالاب میقان پیشنهاد می‌شود. | ||
| کلیدواژه‌ها | ||
| تالاب میقان؛ تراکم کرنل؛ ریسک اکولوژیک؛ ضریب آلودگی؛ فلزات سنگین | ||
| عنوان مقاله [English] | ||
| Zoning concentration and ecological risk assessment of heavy metals in sediments of Mighan wetland | ||
| نویسندگان [English] | ||
| Samar Mortazavi1؛ Faezeh Saberinasab2 | ||
| 1Assistant Professor, Faculty of Natural Resources and Environmental Science, Malayer University, Hamedan, Iran | ||
| 2M.Sc. Student of Environmental Pollution, Faculty of Natural Resources and Environmental Science, Malayer University, Hamedan, Iran | ||
| چکیده [English] | ||
| With the rise of population and the industry development, many pollutants had been released to environment. Besides, aquatic ecosystems are more vulnerable to chemicals with different combinations particularly heavy metals. In this study, the pollution of sediment around the basin of Mighan wetland with lead, zinc, and copper heavy metals was assessed by acid digestion and Atomic Absorption Spectroscopy, and Contamination Factor (CF) and Potential Ecological Risk Index (RI) were measured. Based on the results, comparisons of metal concentration with sediment quality guidelines (SQGs) were performed. Finally, zoning metals using Kernel Density Estimation showed that the southern and western parts of the wetlands because of industrial zones, agricultural lands wastewater, and industrial area have a high concentration of pollutants. Meanwhile, investigation of heavy metals represented a high concentration of copper metal relative to zinc and lead metals in the region. In the end, the requirement for contaminants controlling in the Mighan wetland is recommended. | ||
| کلیدواژه‌ها [English] | ||
| Kernel density, ecological risk, Contamination Factor, Meighan wetland, Heavy metals | ||
| مراجع | ||
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