تأثیر یون تارتارات بر رفتار جدایش روی و کادمیم در محلول سولفاتی

نویسندگان

1 1- دانشکده مهندسی معدن و متالورژی، دانشگاه صنعتی امیرکبیر

2 2- دانشکده مهندسی مواد و متالورژی، دانشگاه علم و صنعت ایران

چکیده

هدف این تحقیق بررسی تأثیر یون تارتارات (C4H4O6-2-) بر استخراج و جدایش روی و کادمیم با استفاده از استخراج‏ کننده D2EHPA است. حضور یون تارتارات در محلول، باعث جابه‌‏جایی منحنی استخراج روی و کادمیم به‌سمت pHهای قلیایی‌‏تر می‏‌شود؛ ولی میزان جابه‌جایی منحنی استخراج کادمیم قابل توجه‌‏تر است. در صورت استفاده از D2EHPA بدون حضور یون تارتارات، مقدار ΔpH50% برابر با 65/0 است. اگر 2/0 مولار یون تارتارات به فاز آبی افزوده شود مقدار ΔpH50% به 09/1 افزایش می‏‌یابد. آنالیز طیف‌سنجی تبدیل فوریه مادون سرخ روی فاز آلی نشان داد که یون تارتارات به‌همراه روی و کادمیم جذب فاز آلی می‏‌شود. روش آنالیز شیب نشان داد 25/0 مول و 5/0 مول یون تارتارات به‌ترتیب به‌همراه روی و کادمیم وارد واکنش تشکیل کمپلکس می‌شود، اما عدد استخراج با افزایش غلظت یون تارتارات تغییر می‌کند.

کلیدواژه‌ها

عنوان مقاله [English]

The Effect of Tartrate Ion on the Separation Behavior of Zinc and Cadmium in the Sulfate Solution

نویسندگان [English]

  • A. Vahedi 1
  • H. Nadimi 2
  • D. Haghshenas Fatmesari 1
  • S. Firoozi 1
1 1. Department of Mining and Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran.
2 2. School of Metallurgy and Materials Engineering, Iran University of Science and Technology (IUST), Tehran, Iran.
چکیده [English]

The aim of this study was to investigate the effect of tartrate ion (C4H4O62-) on the extraction and separation of zinc and cadmium using D2EHPA extractant. The presence of tartrate ion in the solution caused the shift of  the  extraction curve of zinc and cadmium to the more alkaline pH; however, the shifting rate for the cadmium extraction curve was more significant. In the absence of tartrate ion, ΔpH50% value was equal to 0.65. If 0.2 M tartrate ion were added to the aqueous phase, ΔpH50% value would increase to 1.09. The FT-IR analysis of organic phase showed that tartrate ion absorbed the organic phase along with zinc and cadmium. "Slope analysis method" also showed that 0.25 M and 0.5 M tartrate ion participated in the zinc-tartrate and cadmium-tartrate complex formation, respectively; however, extraction number was changed with increasing the tartrate ion concentration.

کلیدواژه‌ها [English]

  • zinc
  • cadmium
  • D2EHPA
  • Tartrate ion
  • FT-IR analysis
  • Slope analysis method

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مواد پیشرفته در مهندسی
دوره 37، شماره 3
آذر 1397
صفحه 63-73

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