بررسی پایش بیولوژیکی غلظت فلزات سنگین در کلان شهر اراک

نوع مقاله: مقالات پژوهشی

نویسندگان

1 گروه علوم باغبانی- دانشکده کشاورزی و منابع طبیعی- دانشگاه اراک- اراک

2 گروه محیط زیست- دانشگاه اراک

چکیده

چکیده
زمینه و هدف: استفاده از گیاهان جهت پایش آلودگی­ها، روشی مناسب است و در همین راستا زیست­ردیابی، یکی از راه­های ارزان و ساده بررسی کیفیت هوا و خاک است. با توجه به مشکل آلودگی فلزاتی مانند کروم، کادمیم، نیکل و سرب در شهر صنعتی اراک که توسط محققان گزارش شده است، به احتمال زیاد جذب بالای این آلاینده­ها توسط گیاهان فضای سبز موجود وجود خواهد داشت، لذا مطالعه حاضر با هدف بررسی میزان آلودگی­ فلزات سنگین در اندام‌های درختان توت در مناطق مختلف شهر اراک انجام گرفت.
مواد و روش­ها: میزان 13 عنصر در اندام‌های میوه و برگ گونه­های درختان توت مجنون و توت سفید کشت شده در فضاهای سبز سطح شهر اراک با سه تکرار اندازه­گیری شد. نقشه توزیع میزان غلظت فلزات سنگین به تفکیک میوه و برگ در هر گونه جداگانه و با استفاده از روش درون‌یابی عکس فاصله در محیط سیستم اطلاعات جغرافیایی به­دست آمد.
یافته­ها: بر اساس مقایسه حد مجاز فلزات در محصولات خوراکی­ و میزان فلزات موجود در میوه درختان توت مناطق اراک مشاهده شد، میوه توت از جنبه آلودگی به فلزات آلومینیوم (29 میلی­گرم در لیتر)، کادمیوم (0/66 میلی­گرم در لیتر) و سرب (1/3 میلی­گرم در لیتر) بالا و در حد غیرمجاز بود. نقشه­های پهنه­بندی آلودگی­های فلزی نشان داد که توزیع اغلب آلودگی­های فلزی در خارج از محدوده مناطق صنعتی عمده است و تجمع بیشتر در مناطق مرکزی وجود داشت. احتمالاً پراکندگی ذرات دارای فلزات سنگین از طریق باد از محل کارخانجات صنعتی، دلیل افزایش غلظت فلزات در این مناطق بوده است.
نتیجه­گیری: با توجه به آلودگی میوه­های درختان توت به فلزات سنگین، هشدار جدی نسبت به مصرف خوراکی این میوه به­ویژه در شهر اراک وجود دارد.
نوع مقاله: مقاله پژوهشی
کلید واژه­ها: آلودگی فلزی، انباشت، توت، میوه خوراکی
 

کلیدواژه‌ها


عنوان مقاله [English]

Investigation of Bioaccumulation of Heavy Metals Concentration in Arak Metropolitan

نویسندگان [English]

  • Mina Taghizadeh 1
  • Mina Taghizadeh 2
1 Dep horticulture- Arak university
2 Arak university
چکیده [English]

Background and purpose: Using plants to monitor contamination is a suitable method. In this regard, biomonitoring is one of the inexpensive and easy ways to evaluate the quality of air and soil. Considering the problem of contamination of metals such as chromium, cadmium, nickel and lead in the industrial city of Arak, which is reported by researchers, it is likely that these pollutants will be highly absorbed by existing greenhouse plants. Therefore in this study, the amount of heavy metals contamination in mulberry trees (Morus alba) was investigated in different site of the Arak city during the months of May to June 2012.
Materials and methods: The amount of 13 elements was measured in the fruit and leaf organs of the Morus alba var. pendula and Morus alba with three replications in the landscapes of the Arak city. The map of distribution of heavy metals concentration in fruit and leaf separately in each individual case was carried out using Inverse Distance Weighted method in GIS environment.
Results: Based on the comparison of the limitations of metals in food products and the amount of metals found in fruits of berry trees in Arak areas, the berries were high and unauthorized due to contamination of aluminum (29 mg l-1), cadmium (0.66 mg l-1) and lead (1.3 mg l-1). Metal pollution contamination mapping showed that the distribution of most metal contaminants is outside the industrial zone and there is more accumulation in the central regions. Probably, the dispersion of heavy metal particles from industrial sites has led to an increase in the concentration of metals in these areas.
Conclusion: Therefore, due to the contamination of the mulberry fruit of these heavy metals, there is a serious warning about the consumption of this fruit, especially in the city of Arak.

کلیدواژه‌ها [English]

  • Accumulation
  • Edible Fruit
  • Metal pollution
  • Mulberry

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