تعیین ضریب توزیع و بررسی رفتار جذبی کبالت در خاک آبرفت پسماندگاه انارک

نوع مقاله : مقاله پژوهشی

نویسندگان

1 شرکت پسمانداری صنعت هسته‌ای ایران، سازمان انرژی اتمی ایران، تهران، ایران

2 پژوهشکده کاربرد پرتوها، پژوهشگاه علوم و فنون هسته‌ای، تهران، ایران

3 پژوهشکده چرخه سوخت هسته‌ای، پژوهشگاه علوم و فنون هسته‌ای، تهران، ایران

چکیده

تحلیل ایمنی ساختگاه انارک به عنوان تنها مرکز دفع پسماند‌های پرتوزا به منظور حفظ سلامت انسان و محیط زیست حائز اهمیت ویژه­ای است. ضرایب توزیع مواد پرتوزا در خاک های منطقه مورد مطالعه، یکی از پارامترهای تاثیرگذار در محاسبات تحلیل ایمنی به شمار می ­آید. لذا در این مطالعه، ضریب توزیع کبالت در خاک آبرفت پسماندگاه انارک به روش بچ تعیین شد و اثر غلظت آلاینده، دانه­بندی خاک و نسبت خاک به محلول مورد مطالعه قرار گرفت. همچنین به منظور تعیین رفتار جذبی کبالت در خاک انارک، ایزوترم­ های جذب خطی، فرندلیچ و لانگمویر مورد تجزیه و تحلیل قرار گرفتند.  مقدار میانگین ضریب توزیع کبالت در خاک مذکور برابر با mL/g 18/247 محاسبه گردید. رفتار جذبی کبالت در خاک انارک از ایزوترم جذب لانگمویر با همبستگی مثبت و معنی دار تبعیت کرد. بیشینه مقدار جذب کبالت برابر با 029/0 میلی­ گرم بر گرم خاک تعیین گردید. نتایج ضریب توزیع حاصل در این مطالعه از اکثر مقادیر ارائه شده در سایر تحقیقات پیشین کمتر است که می­تواند به ویژگی های خاک از جمله بافت خاک (شنی لومی) مرتبط باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Distribution coefficient determination of cobalt on alluvium soil of Anarak Nuclear Repository

نویسندگان [English]

  • Amir Masoud Taherian 1
  • Ali Maleki 1
  • Samaneh Zolghadri 2
  • Hassan Yousefnia 2
  • Zahra Shiri Yekta 3
  • Samaneh Sarfi 3
  • Hassan Aghayan 3
  • saeid momenzadeh 1
1 Iran radioactive waste company, Atomic energy organization, Tehran, Iran
2 Radiation Application Research School, Nuclear science and technology Research Institute, Tehran, Iran
3 Nuclear fuel cycle Research School, Nuclear science and technology Research Institute, Tehran, Iran
چکیده [English]

The safety assessment of Anarak site as the only center for the disposal of radioactive waste is of particular importance in order to maintain human health and the environment. Distribution coefficients of radioactive materials in the soils of the area under study is one of the influential parameters in the safety assessment calculations. Therefore, in this study, the distribution coefficient of cobalt in the alluvial soil of Anarak waste was determined by the batch method and two parameters of concentration and soil to solution ratio were studied. Linear adsorption isotherms, Friendlich and Langmuir were also analyzed to determine the adsorption behavior of cobalt in Anarak soil. The average value of cobalt distribution coefficient in the mentioned soil was calculated equal to 247.18 mL / g. The adsorption behavior of cobalt in Anarak soil followed the Langmuir adsorption isotherm with a positive and significant correlation. The maximum amount of cobalt uptake was determined as 0.029 mg / g soil. The results of the distribution coefficient obtained in this study are lower than the most of the values ​​presented in the other previous researches, which can be related to the soil texture (sandy loam) and the other soil characteristics.
 

کلیدواژه‌ها [English]

  • Distribution coefficient
  • Cobalt
  • Repository
  • Anarak
  • Batch method
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