ارزیابی آلودگی خاک سطحی به فلزات سنگین ناشی از صنایع فولاد

نوع مقاله: مقالات پژوهشی

نویسندگان

1 کارشناس ارشد محیط زیست،محیط زیست،دانشکده منابع طبیعی،دانشگاه یزد،یزد، ایران

2 دانشیار محیط زیست-گروه محیط زیست- دانشکده منابع طبیعی- دانشگاه یزد-یزد-ایران

3 استاد منابع طبیعی و کویرشناسی گروه مرتع و آبخیزداری، دانشکده منابع طبیعی، دانشگاه یزد، یزد، ایران

4 استادیار منابع طبیعی و کویرشناسی گروه مدیریت مناطق خشک و بیابانی، دانشگاه یزد، یزد، ایران

چکیده

چکیده
زمینه و هدف: افزایش جمعیت منجر به گسترش صنایع شده و مدیریت نادرست صنایع منجر به آلودگی اراضی و آسیب­های جبران­ناپذیر به طبیعت و موجودات زنده می­گردد. لذا بررسی نقش مراکز صنعتی در آلودگی خاک، از مهم‌ترین اقدامات در زمینه کنترل آلودگی­هاست. مطالعه حاضر با هدف ارزیابی آلودگی خاک سطحی به فلزات سنگین ناشی از صنایع فولاد انجام شد.
مواد و روش­ها: در این مطالعه به‌منظور تعیین غلظت فلزات سنگین کادمیوم و سرب خاک، 6 نمونه­ خاک از عمق 0-5 سانتی­متر مناطق اطراف کارخانه جمع­آوری شدند. میزان سرب و کادمیوم در نمونه­ توسط دستگاه جذب اتمی شعله اندازه­گیری شد. شاخص­های آماری غلظت عناصر مورد بررسی در غبار سطحی خاک محاسبه شد، سپس غلظت عناصر در خاک قبل و بعد کارخانه مقایسه شدند و برای ارزیابی وضعیت آلودگی فلزات سنگین و بررسی اثرات محیط­زیستی درجه آلودگی اصلاح­شده، شاخص­های درجه آلودگی و درجه خطر بالقوه محیط­زیستی محاسبه شد.
یافته­ها: بر اساس نتایج حاصل از آنالیز خاک، بیشترین میزان کادمیوم 35/60 میلی‌گرم بر کیلوگرم و کمترین 24/60 میلی‌گرم بر کیلوگرم و برای سرب بیشترین مقدار 156/30 میلی‌گرم بر کیلوگرم و کمترین 99/33 میلی‌گرم بر کیلوگرم بود که بین میزان کادمیوم قبل و بعد کارخانه اختلاف معناداری وجود داشت که نشان می‌دهد میزان شاخص آلودگی برای آن شدید و خطرناک است، در صورتی که برای عنصر سرب، آلودگی کم و بی‌خطر است.
نتیجه­گیری: غلظت دو عنصر اندازه­گیری شده نشان داد که تنها عنصر کادمیوم بالاتر از استانداردهای جهانی بوده و این نمایانگر میزان آلایندگی این کارخانه می­باشد، لذا برنامه­ریزی برای کنترل انتشار این فلز و آلاینده­های دیگر باید مورد توجه قرار گیرد.
نوعمقاله: مقاله پژوهشی

کلیدواژه‌ها


عنوان مقاله [English]

Evaluation of Heavy Metals contamination in Surface Soil Caused by Steel Industry

نویسندگان [English]

  • Mostafa Abyareh 1
  • Farhad Nejadkoorki 2
  • Mohammad reza Ekhtesasi 3
  • Mohammad Akhavan ghalibaf 4
1 1. MSc in Environmental Engineering, Department of Environment, Faculty of Natural Resources,Yazd University, Yazd, Iran
2 Associate Professor of Environment, Department of Environment, Faculty of Natural Resources,Yazd University, Yazd, Iran
3 Professor of Natural Resources and Desertification Department of Range and Watershed Management- Yazd University, Yazd, Iran
4 Assistant Professor, Faculty of Natural Resources and Desertification Department of Management Arid and Desert Regions- Yazd University, Yazd, Iran
چکیده [English]

Background and purpose: Expanded industries and incorrect management led to land pollution, which caused irreparable damage to nature and organisms. Therefore, investigating the role of industrial centers in soil pollution is among the most important measures in field of pollution control. This study aimed to evaluate the Heavy Metals contamination in Surface Soil Caused by Steel Industry.
Materials and Methods: In this study, to determine the concentration of Cadmium and Lead in soil, 6 soil samples with a depth of 0-5 cm from surrounding areas were collected. Lead and Cadmium levels were measured in soil samples by flame atomic absorption. The statistical indices for concentrations of elements in soil dust were calculated, then the concentrations of the elements in soil before and after the factory were compared, and In order to evaluate the contaminations of heavy metals and to study the environmental impact of the modified degree of contamination, the degree of contamination and the potential environmental risk were calculated.
Results: The minimum and maximum amounts for Cadmium and Lead contamination in soil were 24.60, 99.30 and 35.60, 156.30 mg/kg respectively. The results indicated there was a meaningful difference between the amount of Cadmium before and after the company. The pollutant index for Cadmium was extreme and dangerous, whereas the pollutant index for Lead was not critical.
Conclusion: Concentrations of two measured elements showed that only level of cadmium was higher than global standards and this indicates polluting role of this factory. Therefore planning for control the release of this metal and other pollutants should be considered.

کلیدواژه‌ها [English]

  • contamination soil
  • Pollution index
  • Steel Plant

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