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Lithium Extraction from Urmia Lake Brines

Soleimani Khalaji, Milad | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 49005 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Askari, Masoud; Alamolhoda, Ali Asghar
  7. Abstract:
  8. Using a Lithium Selective Ion Sieve is one of the most advanced processes for Extraction of lithium from Brines. The ability to Extract Lithium selectively from brines make the ion sieve suitable for brines with low concentrations of lithium. In this study brines samples from Urmia Lake with lithium concentration of 30 ppm was used. The main objective of this study was to find the best condition for lithium adsorption and desorption using the synthesized titanium dioxide ion sieve. In this study lithium selective ion sieve with nanotube morphology and Diameter of 81 nm was synthesized. Study on pH of synthesized solution containing lithium ions was carried out and pH=12 was concluded the optimum amount for adsorption process. Study on adsorption time showed that experimental data had a very good accordance with pseudo-second order kinetic model and after 48 hours, adsorption equilibrium was maintained. Effect of equilibrium lithium concentration in synthesized solution on adsorption capacity was studied and it showed that experimental data had a good accordance with Freundich isotherm model. Study on desorption of lithium from ion sieve was also carried out and amounts of 8 hours and 0.1 molar for desorption time and HCl concentration was concluded. Finally the Adsorption process on Urmia Lake showed that 58 percent of lithium in the brine sample was adsorb by ion sieve
  9. Keywords:
  10. Titanium Dioxide ; Lithium ; Hydrothermal Method ; Urumieh Lake ; Ion Sieve

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