Recovery of W(VI) from Wolframite Ore Using New Synthetic Schiff Base Derivative

Area of Science:

• Materials Science
• Environmental Chemistry
• Inorganic Chemistry

Background:

• Tungsten (W) is a critical element with applications in various industries.
• Efficient methods for tungsten recovery from solutions and ores are essential for sustainable resource management.
• Developing selective adsorbents is key to isolating tungsten ions from complex matrices.

Purpose of the Study:

• To synthesize and characterize a new material, HNAP/QA, for selective W(VI) ion adsorption.
• To investigate the optimal conditions, kinetics, and thermodynamics of W(VI) adsorption onto HNAP/QA.
• To evaluate the efficacy of HNAP/QA for tungsten recovery from wolframite ore.

Main Methods:

• Synthesis of HNAP/QA material.
• Characterization using FTIR, 1H-NMR, 13C-NMR, 31P-NMR, TGA, and GC-MS.
• Adsorption studies including optimization, kinetics, and thermodynamics.
• Application in tungsten recovery from wolframite ore leachate.

Main Results:

• Successful synthesis and characterization of HNAP/QA.
• HNAP/QA demonstrated selective adsorption of W(VI) ions from solutions and rock leachate.
• Adsorption followed the Langmuir model, indicating a spontaneous and endothermic process (∆G° < 0, ∆H° > 0, ∆S° > 0).
• Successful recovery of W(IV) from wolframite ore was achieved.

Conclusions:

• HNAP/QA is a promising synthetic adsorbent for selective W(VI) ion removal.
• The adsorption process is favorable, spontaneous, and endothermic.
• HNAP/QA shows practical application potential for tungsten recovery from natural resources.