بررسی قابلیت تحرک و دسترسی زیستی مس در خاک مزارع برنج آبیاری شده با فاضلاب شهرک صنعتی آمل

محورهای موضوعی : آلودگی محیط زیست (آب و فاضلاب)

فاطمه احمدی پور ¹ ((مسوول مکاتبات): دانشجوی دکتری محیط زیست دانشگاه تربیت مدرس، تهران، ایران.)
نادر بهرامی فر ² (استادیار دانشکده منابع طبیعی و علوم دریایی نور، دانشگاه تربیت مدرس واحد نور، مازندران، ایران.)
سید محمود قاسمپوری ³ (استادیار دانشکده منابع طبیعی و علوم دریایی نور، دانشگاه تربیت مدرس واحد نور، مازندران، ایران.)

تاریخ دریافت : 1390/04/18 تاریخ پذیرش : 1390/10/21 تاریخ انتشار : 1395/09/01

کلید واژه: خاک, فاضلاب, تحرک, دسترسی زیستی, استخراج ترتیبی,

چکیده مقاله :

زمینه و هدف: رفتار فلزات در خاک ها مثل تحرک و دسترسی زیستی، براساس مجموع غلظت فلزات سنگین، قابل پیش بینی نمی باشد. جذب و سمیت فلزات به فرم شیمیایی فلزات، وابسته می باشد بنابراین بررسی تحرک و دسترسی زیستی فلزات سنگین موجود در خاک برای مطالعات زیست محیطی از اهمیت زیاد برخوردار می باشد. روش بررسی: در این تحقیق با استفاده از تکنیک استخراج ترتیبی BCRاصلاحی، فرم های مختلف فلز مس در خاک مزارع برنج آبیاری شده با فاضلاب شهرک صنعتی آمل تعیین شدند. آنالیز نمونه ها با استفاده از دستگاه جذب اتمی GBC مدل Sens AA انجام گرفت. یافته ها: نتایج نشان داد که فرم باقیمانده و فرم قابل حل در اسید-تبادلی-کربنات به ترتیب بیشترین و کمترین میزان (17/77 و 2/7) را تشکیل می دهند. همچنین ضریب تحرک و درصد بازیابی به ترتیب 39/2 و 6/96 بدست آمد. نتیجه گیری: تحرک و دسترسی زیستی فلز مس در خاک شالیزارهای این منطقه پایین است. بنابراین احتمال آلودگی این فلز در منطقه پایین است.

چکیده انگلیسی:

Background and Objective: Behavior of metals in soils, such as mobility and bioavailability based on the total concentration of heavy metals, is not predictable. Absorption and toxicity of metals are dependent on their chemical fraction. Therefore, investigation of mobility and bioavailability of heavy metals are very important in the environmental studies. Method: Using BCR modified sequential extraction procedure, different forms Cu in the soil of rice fields irriggated by Amol industrial wastewater were determined in this study. Samples were analyzed by the Atomic Absorption Sens AA model. Results: The results showed that the residual form and the acid soluble, exchangeable, carbonate form were at their maximuum and minimum amounts (77.17 and 2.7), respectively. Moreover, mobility factor and recovery percent were obtained to be 2.39 and 96.6, respectively. Conclusion: Mobility and bioavailability of copper in soil of rice farms in this area are low. Therefore, the possibility of pollution by this metal is low.

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