بررسی و مقایسه‌ی سینتیک و هم‌دمای جذب زیستی توریم به ‌‌وسیله‌ی پوست پرتقال و سلولز حاصل از آن

نوع مقاله: مقاله پژوهشی

نویسندگان

1 پژوهشکده‌ی چرخه‌ی سوخت هسته‌ای، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی ایران، صندوق پستی: 8486-11365، تهران ـ ایران

2 دانشکده‌ی مهندسی شیمی، پردیس دانشکده‌های فنی، دانشگاه تهران، صندوق پستی: 4563-11365، تهران ـ ایران

چکیده

در این پژوهش جذب زیستی توریم از محلول‌های آبی به وسیله‌ی پوست پرتقال و سلولز استحصال شده از آن مطالعه و با یک‌دیگر مقایسه شد. مطالعه‌های سینتیکی نشان داد که برای جذب توریم به وسیله‌ی پوست پرتقال مدل‌های سینتیکی الویچ و شبه مرتبه‌ی دوم و به وسیله‌ی سلولز مدل سینتیکی مرتبه‌ی دوم به خوبی با نتیجه‌های تجربی مطابقت دارد. هم‌دما‌های جذب لانگمویر، فروندلیچ، دوبینین- رادشکویچ، تمکین و ردلیش- پترسون بررسی و برای یافتن بهترین هم‌دما، سه روش تحلیل خطا شامل ضریب همبستگی (2R)، جذر متوسط مربع خطاها (RMSE) و آزمون مجذور کی (2χ) مورد استفاده قرار گرفت. تحلیل خطاها برای پوست پرتقال نشان داد که از میان مدل‌های هم‌دما به ترتیب، مدل ردلیش- پترسون، تمکین، دوبینین- رادشکویچ و فروندلیچ دارای کم‌ترین خطا هستند. در مورد سلولز هم‌دمای فروندلیچ دارای کم‌ترین خطا بود. یافته‌ها نشان داد که زمان لازم برای به تعادل رسیدن فرایند جذب توریم به وسیله‌ی پوست پرتقال 4 ساعت و به وسیله‌ی سلولز حدود 1 ساعت است. استفاده از سلولز پوست پرتقال به عنوان جاذب باعث افزایش سرعت جذب و کاهش زمان تعادل شده است.
 

کلیدواژه‌ها


عنوان مقاله [English]

Investigation and comparison of the kinetics and isotherms of thorium biosorption on orange peel and orange peel cellulose

نویسندگان [English]

  • Aliasghar Ghorbanpour Khamseh 1
  • Ahmad Movafaghpour 2
  • Seyed mohammadali Mosavian 2
چکیده [English]

In this research work, the biosorption of thorium from aqueous solutions by orange peel (OP) and orange peel cellulose (OPC) was studied and compared with each other. The kinetic studies showed that the Elovich and pseudo-second order kinetic models are well matched with the experimental results for the OP. For the case of OPC, the pseudo-second order kinetic models are well matched with the experment. The Langmuir, Freundlich, Dubinin–Radushkevich, Temkin and Redlich-Peterson isotherm models were also investigated. In order to find the best isotherm, three error analysis methods, i.e., correlation coefficient (R2), root mean square error (RMSE) and Chi square (χ2) were used. The error analysis showed that Redlich-Peterson, Temkin, Dubinin–Radushkevich and Freundlich models had miner errors, while the OPC Freundlich model had the smallest. Experimental results showed that the time required to reach the equilibrium is 4 h in the case of using OP as a biosorbent. In the case of using OPC as a biosorbent, the needed time to reach the equilibrium was about 1 h. Using OPC increases the adsorption rate and reduces the needed equilibrium time.
 

کلیدواژه‌ها [English]

  • Biosorption
  • Thorium
  • Orange Peel
  • Cellulose
  • Kinetic

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