Highly Efficient Recovery of Vanadium and Chromium: Optimized by Response Surface Methodology

Area of Science:

• Metallurgical Engineering
• Chemical Engineering
• Environmental Science

Background:

• Industrial waste contains valuable metals like vanadium and chromium.
• Efficiently leaching these metals is crucial for resource recovery and environmental protection.
• Optimization of leaching parameters is necessary to maximize metal recovery.

Purpose of the Study:

• To optimize the processing parameters for leaching vanadium and chromium.
• To determine the significant factors affecting the leaching efficiency of vanadium and chromium.
• To achieve high recovery rates for both metals.

Main Methods:

• Response surface methodology (RSM) was employed for optimization.
• Key parameters investigated: NaOH dosage, H2O2 dosage, temperature, liquid-to-solid ratio, stirring rate, and reaction time.
• Statistical analysis was used to identify significant parameters.

Main Results:

• Vanadium leaching was significantly influenced by NaOH and H2O2 dosage.
• Chromium leaching efficiency was most affected by H2O2 dosage, followed by temperature, NaOH dosage, reaction time, stirring rate, and liquid-to-solid ratio.
• Achieved leaching efficiencies of 98.60% for vanadium and 79.82% for chromium.

Conclusions:

• The study successfully optimized the leaching process for vanadium and chromium.
• RSM is an effective tool for optimizing hydrometallurgical processes.
• High recovery rates demonstrate the potential for industrial application in metal recycling.