شناسایی و خالص‌‌سازی مونتموریلونیت از بنتونیت معدن قائن

نوع مقاله : مقالات پژوهشی

نویسندگان

• پریسا میرحسینی موسوی ¹
• علیرضا آستارایی ¹
• علی رضا کریمی ²
• غلامرضا کریمی ³

¹ دانشگاه فردوسی مشهد

² فردوسی مشهد

³ دانشگاه علوم پزشکی مشهد

https://doi.org/10.22067/jsw.v0i0.25379

چکیده

مونتموریلونیت کانی غالب تشکیل‌دهنده بنتونیت است که در بسیاری از صنایع مورد استفاده قرار می‌گیرد، اما وجود ناخالصی‌های غیر از مونتموریلونیت موجب کاهش کیفیت آن می‌شود. هدف این پژوهش تعیین روشی مناسب جهت خالص‌سازی مونتموریلونیت از بنتونیت تولیدی معدن قائن بود. برای این منظور از ترکیبی از روش الک تر، استفاده از روش ته‌نشینی ذرات، سانتریفوژ و اولتراسونیک استفاده شد. کارایی روش‌ خالص‌سازی با استفاده از آنالیز پراش پرتو ایکس، تعیین اندازه ذرات، تبادل کاتیونی و نسبت شدت پیک کوارتز به مونتموریلونیت قبل و پس از خالص‌سازی تعیین شد. نتایج این مطالعه نشان داد که بکارگیری روش‌های مذکور برای تهیه ماده‌ای سرشار از مونتموریلونیت با اندازه ذرات کوچک‌تر از 2 میکرومتر مناسب است. کریستوبالیت تنها کانی بود که با وجود حذف مقدار زیادی از آن، هنوز به‌عنوان ناخالصی به همراه مونتموریلونیت باقی مانده است که احتمالا تنها راه حذف کامل آن استفاده از روش های شیمیایی است. نتیجه این پژوهش نشان داد که با استفاده از روش‌های سریع و ارزان می‌توان بنتونیت را تا حد مناسبی خالص‌سازی کرد.

کلیدواژه‌ها

• مونتموریلونیت
• بنتونیت
• خالص‌سازی رس

20.1001.1.20084757.1394.28.5.12.0

عنوان مقاله [English]

Identification and Purification of Montmorillonite Mineral of Ghaen Mine Bentonite

نویسندگان [English]

• P. Mirhoseini Moosavi ¹
• A. Astaraei ¹
• Ali reza Karimi ²
• Gh. Karimi ³

¹ University of Mashhad

² ferdowsi university of mashhad

³ Mashhad University of Medical Science

چکیده [English]

Montmorillonite is the major mineral of Bentonite with many applications in industrial fields but some impurities decreases the quality of the bentonite. The main objective of this study was to investigate the suitable method for purification of Ghaen mine bentonite. A combination of methods was considered including wet sieving and sedimentation, centrifuge and ultrasound. The efficiency of purification methods was determined based on X-ray, particle size, cation exchange capacity (CEC) and ratio peak of the Quartz/Montmorillonite analysis before and after experiments. The results showed that such methods were efficient for preparing of the materials having high quantity of montmorillonite with less than 2 microns particle sizes. Cristobalite was the only mineral remained in samples, however many of particles were exempted from the samples. Cristobalite was the main impurity remained with montmorillonite. Chemical treatment is the only way for its complete removal. The results of this study revealed that by using easy, cheap and fast methods, it is possible for acceptable purification of bentonite.

کلیدواژه‌ها [English]

• Montmorillonite
• bentonite
• Purification of Clay

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