بررسي ميزان غلظت فلزات سنگین موجود در PM10 هوای شهر اهواز

غلامرضا گودرزی, نادعلی علوی بختیاروند, محمد شیرمردی, محمد حیدری فارسانی, کامبیز احمدی انگالی, الهه زلقی, مهدی وثوقی نیری

چکیده


اهواز به عنوان کانون مرکزی جنوب غربی ایران، تحت تأثیر طوفان‌های گردو غبار خاورمیانه‌ای نشأت‌گرفته از عراق، عربستان سعودی، اردن، سوریه و همچنین آفریقا قرارگرفته است. هدف اصلی از این مطالعه بررسی میزان غلظت فلزات سنگین موجود در PM10 در طی روزهای عادی و گردو غباری در شهر اهواز بود. یک دستگاه نمونه‌بردار با حجم بالا برای جمع‌آوری نمونه از یک منطقه پرترافیک شهری انتخاب گردید. نتایج نشان داد که در طول روزهای گردو غباری متوسط غلظت PM10 در فصل بهار و تابستان به ترتیب 300 و 278 و در روزهای عادی به ترتیب 145 و126 میکروگرم در متر‌مکعب بود. محاسبات فاکتور غنی‌سازی نشان داد که فلز آلومینیوم با فاکتور غنی‌سازی پایین دارای منشأ زمینی بوده درحالی‌که فلز روی و سرب با میزان فاکتور غنی‌سازی بالا ریشه در منابع انسان ساخت مانند حمل‌ونقل و انتشارات صنعتی داشتند. در طول دوره مطالعه غلظت PM10 بالاتر از مقادیر استاندارد بود.


واژگان کلیدی


گردو غبار، فاکتور غنی‌سازی، نمونه‌بردار با حجم بالا، منابع انسان ساخت

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