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International Journal of Engineering، جلد ۱۶، شماره ۳، صفحات ۲۹۳-۳۰۰
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| عنوان فارسی |
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| چکیده فارسی مقاله |
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| کلیدواژه‌های فارسی مقاله |
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| عنوان انگلیسی |
Role of Calcium Content in Dissolution Kinetics of Iranian Borate Minerals in Sulfuric Acid |
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| چکیده انگلیسی مقاله |
The dissolution kinetics of pandermite and hydroboracite, present in an Iranian borate ore, in sulfuric acid has been comparatively studied. The effect of particle size, temperature, and acid concentration on their dissolution rate was investigated. Dissolution rates of both minerals increased by reducing the particle size and by raising the temperature. Although, an increase in the acid concentration from 0.5 to 1 N accompanied an increase in the dissolution rate, the concentration beyond 1N did not produce any significant change. The dissolution of hydroboracite occurred appreciably faster than pandermite, which was attributed to its lower calcium content. This could be due to the formation of a product layer namely, CaSO4.2H2O, acting as a diffusion barrier, which in the case of hydroboracite was less effective. The rate data obtained was in agreement with a kinetic model proposed for diffusion- controlled heterogeneous reactions. |
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| کلیدواژه‌های انگلیسی مقاله |
Borate, Pandermite, Hydroboracite, Dissolution |
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| نویسندگان مقاله |
M. A. Bahreva |
, Merc
Amir Ali Youzbashi |
Engineering, Merc
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| نشانی اینترنتی |
http://www.ije.ir/article_71463_96c27b8ee3c1ffc5e6a56f327524e408.pdf |
| فایل مقاله |
اشکال در دسترسی به فایل - ./files/site1/rds_journals/409/article-409-2417279.pdf |
| کد مقاله (doi) |
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| زبان مقاله منتشر شده |
en |
| موضوعات مقاله منتشر شده |
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| نوع مقاله منتشر شده |
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