استخراج حلالـی روبیدیم از محلول فروشویی کانسنگ‌های ایران مرکزی با استفاده از لیگاندهای درشت حلقه‌ای کرون اتر

نوع مقاله : علمی - پژوهشی

نویسندگان

1 دانشیار پژوهشکده‌ی چرخه سوخت هسته‌ای، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی، تهران- ایران

2 کارشناسی ارشد دانشکده‌ی مهندسی معدن، دانشگاه یزد، یزد- ایران

3 استادیار پژوهشکده‌ی چرخه سوخت هسته‌ای، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی، تهران- ایران

چکیده

استخراج حلالی (SX) روبیدیم (Rb) از محلول فروشویی سنگ‌های متاسوماتیک ایران مرکزی توسط لی‌گاندهای درشت حلقه‌ای کرون اتر مختلف مورد بررسی قرار گرفت. تعدادی کرون اتر به عنوان استخراج‌کننده استفاده شد. روبیدیم به‌طور کمی از محیط پیکرات توسط دی‌سیکلوهگزانو-18-کرون-6 (6-C- 18DC) در کلروفرم استخراج و با استفاده از طیف‌بینی نشری شعله‌ای تعیین مقدار شد. در این جا، عوامل مؤثر بر استخراج حلالی روبیدیم ا‌ز محلول‌های مصنوعی روبیدیم ( حاوی 1-mg L 100 روبیدیم) در محیط سولفوریک اسید شناسایی شدند. M 01/0 6-C-18DC در کلروفرم، 1-mol L 01/0 پیکریک اسید در فاز آبی، نسبت فاز آلی- به- آبی 1:1، 5/5 pH و زمان اختلاط 15 دقیقه مقادیر بهینه برای عوامل مؤثر هستند. رسوب‌گیری با سدیم هیدروکسید برای حذف/کاهش ناخالصی‌هایی از جمله آهن، منیزیم، آلومینیم از/ در محلول فروشویی انجام شد. استخراج کامل روبیدیم از محلول‌های آبی و استخراج تقریباً کامل (%81) روبیدیم از محلول زیرصافی متناظر با محلول فروشویی، حاوی 1-mol L 01/0 پیکریک اسید با استفاده از M 01/0 6-C-18DC در کلروفرم انجام شد. بازیابی کامل Rb از فاز آلی باردار، به ترتیب با 1-mol L 4 و 1-mol L 5، هیدروکلریک و نیتریک اسید، با نسبت فاز آلی- به- آبی 1:1 به انجام رسید.

کلیدواژه‌ها


عنوان مقاله [English]

Solvent extraction of rubidium from leach liquor of central Iran metasomatic ores using macrocyclic crown ether ligands

نویسندگان [English]

  • Saeed Alamdar Milani 1
  • Nima Omidvari 2
  • Fazel Zahakifar 3
1 Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute
2 Faculty of mining engineering, School of engineering, Yazd university
3 Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute
چکیده [English]

Solvent extraction (SX) of rubidium (Rb) from leach liquor of central Iran metasomatic ores was studied with various macrocyclic crown ether ligands. Many crown ethers were used as extractants. Rubidium was quantitatively extracted from picrate media by dicyclobexano-18-crown-6 (DC18-C-6) in chloroform, and determined by flame emission spectrometry. Here, the factors affecting SX of Rb from synthetic solutions of rubidium (containing 100 mg L-1 Rb) in sulfuric acid medium were identified. 0.01 mol L-1 DC18C6 in chloroform, 0.01 mol L-1 picric acid in aqueous phase, aqueous to organic (A/O) ratio of 1, pH 5.5 and mixing time of 15 min are the optimum values for affective factors. The precipitation with sodium hydroxide was conducted to remove the leaching impurities such as Fe, Mg, Al. Complete extraction of Rb from aqueous solution and almost complete extraction of Rb (81%) from leaching filtrate containing 0.01 mol L-1 picric acid was performed using 0.01 mol L-1 DC18C6 in chloroform. The Rb complete strippings, was obtained with 4 mol L-1 and 5 mol L-1 hydrochloric and nitric acids, respectively, ‌with A/O ratio of 1:1.

کلیدواژه‌ها [English]

  • Rubidium
  • Leach liquor
  • Metasomatic ores
  • Central Iran
  • Solvent extraction
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