بررسی مکانیزم تاثیر غلظت کلکتور در جدایش انتخابی گالیم از روی به روش فلوتاسیون یونی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده ی مهندسی معدن و متالورژی، دانشگاه صنعتی امیرکبیر، تهران، ایران

2 دانشکده ی گروه مستقل شیمی، دانشگاه صنعتی امیرکبیر، تهران، ایران

چکیده

عنصر روی از جمله ناخالصی موجود در محلول‌های اسیدی در منابع گالیم است که در این تحقیق جدایش انتخابی گالیم از روی به روش فلوتاسیون یونی مطالعه شد. با توجه به اینکه غلظت کلکتور از جمله پارامترهای عملیاتی تاثیرگذار بر فرایند فلوتاسیون یونی است، مکانیزم تاثیر غلظت کلکتور سدیم دو دسیل سولفات در جدایش انتخابی یون گالیم از یون روی در pH=2بررسی شد. نتایج نشان داد که با افزایش غلظت کلکتور، تعاملات الکترواستاتیکی بین گالیم و سر آنیونی از سدیم دو دسیل سولفات افزایش می‌یابد و منجر به تشکیل کمپلکس‌های نامحلول (سابلت) می‌شود. مکانیزم رفتار و مشخصات کمپلکس‌های نامحلول با استفاده از آنالیزهای اسپکتروفتومتری، هدایت الکتریکی، پراکندگی نور دینامیکی و میکروسکوپ الکترونی مطالعه شد. نتایج آنالیزها نشان داد که متوسط اندازه کمپلکس‌های نامحلول ناشی از افزایش غلظت کلکتور بر ضریب انتخابی گالیم نسبت به آلومینیم تاثیر دارد. با افزایش غلظت کلکتور، متوسط اندازه کمپلکس‌های نامحلول کاهش می‌یابد و منجر به حمل یون‌های روی بیشتر به فاز کف و کاهش ضریب انتخابی گالیم می‌شود. جدایش انتخابی بهینه گالیم از یون روی در غلظت هم مولار از دو یون (1/5×10-4) Mدر غلظت 4/5×10-4 Mاز سدیم دو دسیل سولفات بدست آمد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Investigating Mechanism of Collector Concentration on the Selective Separation of Gallium from Zinc Using Ion Flotation

نویسندگان [English]

  • B. Rezai 1
  • B. Rezai 1
  • E. Kowsaric 2
1 Institute of Mineral Processing, Academic Center for Education, Culture & Research (ACECR) at Tarbiat Modares, Tehran, Iran
2 Department of Chemistry, Amirkabir University of Technology, Tehran, Iran
چکیده [English]

Zinc is an impure element in acidic solutions obtained from gallium sources; therefore, the selective separation of gallium from zinc using sodium dodecyl sulfate as an anionic collector was investigated by flotation. The effect of the collector concentration on the selective separation of Ga(III) from Zn(II) were studied at pH=2. The results indicated that the size of Ga(III)-cupferron complexes formed in aqueous solution were significantly affected on the selective separation of gallium from zinc. Also, the results indicated that the optimum selective separation of gallium at an equimolar solution of Ga(III) and Al(III) (1.5 ×10-4 M) obtained after the addition of 4.5×10-4 M sodium dodecyl sulfate to solution. The separation mechanism of flotation and the Ga(III)-cupferron complexes formed was studied using UV-visible spectroscopy, conductimetric analyze, dynamic light scattering and scanning electron microscopy (SEM).

کلیدواژه‌ها [English]

  • Flotation
  • Gallium
  • Selective separation
  • Interaction
  • Conductimetric
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