جذب جیوه از خاک آلوده توسط بوته برنج، مطالعه موردی: مزارع شهرک صنعتی آمل

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد مهندسی محیط زیست، دانشکده منابع طبیعی و علوم دریایی، دانشگاه تربیت مدرس، نور

2 عضو هیئت علمی گروه مهندسی محیط زیست،دانشکده منابع طبیعی و علوم دریایی،دانشگاه تربیت مدرس، نور

3 استادیار گروه شیمی، دانشگاه پیام نور تهران

چکیده

جیوه یکی از سمّی‌ترین عناصر سنگینی است که در بسیاری از صنایع تولید و به محیط دفع می‌شود. مطالعات اندکی در رابطه با تجمع جیوه در خاک و ضریب تجمع زیستی و انتقال آن به گیاه برنج کشت شده در مناطق صنعتی صورت گرفته است. لذا با این هدف در این تحقیق به‌طور تصادفی از 10 مزرعه برنج اطراف شهرک صنعتی آمل که چندین سال با فاضلاب این شهرک آبیاری می‌شدند، نمونه‌برداری با سه تکرار صورت گرفت. غلظت جیوه در نمونه‌های خاک و گیاه با استفاده از دستگاه آنالیز جیوه پیشرفته LECO مدل 254AMA مطابق روش استاندارد ASTM D-6733  سنجش شد و پارامترهای کیفی خاک اندازه‌گیری شدند. متوسط غلظت جیوه در خاک مزارع 0/012± 0/031 میلی‌گرم در کیلوگرمبه‌دست آمد. میانگین غلظت جیوه در ریشه، ساقه و دانه به‌ترتیب 0/0163±0/074، 0/008±0/058 و 0/0083±0/051 میلی‌گرم در کیلوگرماندازه‌گیری شد. همچنین ضرایب انتقال و تجمع زیستی جیوه به‌ترتیب کمتر از 1 و 2/46 محاسبه شد. نتایج آزمون همبستگی پیرسون نشان داد که ارتباط مثبت و معنی‌داری بین غلظت جیوه درخاک با دانه و ارتباط منفی و معنی‌دار بین pH و غلظت جیوه در خاک و ریشه وجود دارد. با توجه به یافته‌های این تحقیق می‌توان گفت که گیاه برنج قابلیت بالایی برای جذب جیوه از خاک دارد.

کلیدواژه‌ها


عنوان مقاله [English]

Absorption of Mercury from Polluted Soil by Rice Plant(Case Study: Farms of Amol Industrial Suburban Area)

نویسندگان [English]

  • Fatemeh Ahmadipour 1
  • Seyed Mahmoud Ghasempouri 2
  • Nader Bahramifar 3
1 M.Sc. Student of EnvironmentalEng., Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Noor
2 Faculty Member of Environmental Eng., Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Noor
3 Assist. Prof.of Chemistry, Payam-e-Noor University, Tehran
چکیده [English]

Mercury has recognized as one of the most toxic heavy metals, which many industries generate and dispose to the environment. Few studies are done about mercury accumulation in soil and bioconcentration and transfer factor of mercury in rice plant cultivated in industrial areas. In this study samples were taken randomly from 10 farms in vicinity of Amol industrial suburban area with three replications. Samples were measured by the LECO AMA 254 Advanced Mercury Analyzer according to ASTM D-6733method. Also the parameters related to the quality of the soil were measured. The mean of mercury concentration in soil, root, stem and grain were found 0.031 ±0.012 mg/kg, 0.074 ±0.0163 mg/kg, 0.058 ±0.008 mg/kg and 0.051 ±0.0083 mg/kg respectively. The calculated transfer factor of mercury to various organs and bioconcentration factor were < 1 and 2.46 respectively. Pearson correlation test showed a positive correlation between mercury concentration in soil with mercury concentration in grain and also a negative correlation between pH with mercury concentration in root and soil. It is concluded that rice plant have high potential for phytoremediation of mercury from soil.         

کلیدواژه‌ها [English]

  • Mercury
  • Rice
  • Soil
  • Bioconcentration
  • Transfer Factor
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