بررسی ایزوترم جذب رنیوم از محلول‌های دو جزئی با استفاده از Dowex 21K و آزمون‌های واجذبی به کمک محلول‌های قلیایی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده فنی مهندسی، دانشگاه ارومیه، ارومیه، ایران

2 دانشکده مهندسی معدن، دانشگاه صنعتی امیرکبیر، تهران، ایران

چکیده

امروزه محلول‌ها و پساب‌های ناشی از فعالیت کارخانه‌های فرآوری مواد معدنی و صنایع وابسته می‌تواند یکی از مهم‌ترین منابع جهت تولید عناصر با ارزش تلقی شود که بررسی روش استخراج و بهبود آن علاوه بر کاهش تامین نیازهای صنایع پیشرفته و به روز می‌تواند به عنوان یکی از روش‌های موثر در کنترل باطله‌ها و کاهش دغدغه‌های محیط زیستی تبدیل شود. در این تحقیق رفتار جذب رنیوم بر روی رزین داوکس 21K از محلول‌های باردار و در حضور مولیبدن، در شرایط کاملا نزدیک به محلول‌های حاوی مس حاصله از عملیات فروشویی توده‌ای، با استفاده از معادلات ایزوترمیک ﻻﻧﮕﻤویر، ﻓﺮوﻧﺪﻟﯿﭻ، ﺗﻤﮑﯿﻦ و دوبنین رادشکویچ مورد بررسی قرار گرفت. نتایج نشان داد که در شرایط جذب تک جزئی، برازش داده‌های به دست آمده از آزمایش‌های استاتیکی بر روی معادلات مذکور بیشترین انطباق را با معادله فرندلیچ و در شرایط دو جزئی با مدل تعمیم یافته آن دارند. بررسی تغییرات ظرفیت رزین در دو شرایط مذکور نشان داد که به واسطه حضور جزء دوم، به دلیل رقابت ایجاد شده بین یون‌های موجود، ظرفیت رزین تا حدود 47% کاهش پیدا می‌کند. همچنین آزمایش‌های واجذبی از هفت نمونه رزین باردار شده با یون‌های رنیوم-مولیبدن با استفاده از استات آمونیوم 0/5 مولار نشان داد که بعد از گذشت 7 ساعت بیش از 92% مولیبدن از روی رزین آزاد می‌شود در حالی که در این مدت میزان واجذبی رنیوم موجود بر روی رزین بیشتر از 13% حاصل نشد. 

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Investigation of rhenium adsorption isotherm from two-component solutions by Dowex 21K and desorption tests using alkaline solutions

نویسندگان [English]

  • Mohammadbagher Fahi 1
  • bahram rezai 2
  • Amirreza Azadmehr 2
1 Mining Department, Engineering Faculty, Urmia, University
2 Mining Eng. Faculty, Amirkabir University
چکیده [English]

Nowadays, solutions and effluents resulting from the activities of mineral processing plants and related industries can be considered one of the most important resources for the production of valuable elements. Examining the extraction method and improving it, in addition to reducing the needs of modern industries, can be considered one of the effective methods in controlling wastes and reducing environmental concerns. In this study, in the presence of molybdenum the adsorption behavior of rhenium on the Dowex 21K resin from pregnant solutions, in conditions very close to copper-containing solutions resulting from heap leaching, was investigated by Freundlich, Temkin, Dubinin – Radushkevich and Langmuir isothermal equations. The results showed that in the case of one-component solutions, the fit of the data obtained from static experiments on the mentioned equations is most consistent with the Friendlich equation and in the case of two-component conditions with its expanded form. Examination of resin capacity changes in the two conditions showed that due to the presence of the second component, competition between the existing ions, the resin capacity is reduced by about 47%. Also, the examination of ammonium acetate (0.5 M) on desorption of adsorbed ions from seven resin samples loaded showed that after 7 hours, more than 92% of molybdenum was released from the resin, while during this period, the amount of rhenium desorption no more than 13% was obtained.

کلیدواژه‌ها [English]

  • Rhenium
  • Molybdenum
  • Dowex 21K resin
  • Isothermal equations
  • Desorption tests
  • Ammonium acetate

مراجع

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نشریه مهندسی عمران امیرکبیر
دوره 54، شماره 11
بهمن 1401
صفحه 4205-4214

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