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Chromium Substitution Extraction Method for Its Recovery from Chromium-Tanned Leather Waste
Lesław Świerczek1, Paulina Hercel2, Izabela Konkol1
1Department of Physical Aspects of Ecoenergy, Institute of Fluid-Flow Machinery, Polish Academy of Sciences, Generała Józefa Fiszera 14 Street, 80-231 Gdańsk, Poland.
Materials (Basel, Switzerland)
|January 11, 2025
Summary
Researchers explored organic acids for extracting chromium from leather waste. Oxalic acid achieved 63.1% extraction efficiency, offering a sustainable solution for chromium-tanned leather waste management.
Area of Science:
- Environmental Chemistry
- Materials Science
- Industrial Waste Management
Background:
- Leather industry generates substantial chromium-tanned leather waste (CTLW), posing environmental and health risks due to chromium toxicity.
- Effective CTLW management is vital for sustainability and resource recovery.
- Existing chromium recovery methods include physical, chemical, and biological processes.
Purpose of the Study:
- To investigate organic acids for substitution extraction of chromium from CTLW.
- To evaluate the safety of the extraction process by monitoring toxic chromium (VI) levels.
- To determine optimal conditions for efficient and safe chromium recovery.
Main Methods:
- Substitution extraction using organic acids.
- Monitoring of chromium (VI) concentration to ensure process safety.
- Optimization of acid concentration and temperature for extraction efficiency.
Main Results:
- Oxalic acid (OA) demonstrated effective chromium extraction.
- Optimal extraction conditions identified: 43.6 °C and 1.34% OA concentration.
- Achieved 63.1% extraction efficiency with minimal hydrolysis (0.70%).
Conclusions:
- Organic acid-based substitution extraction is a viable method for chromium recovery from CTLW.
- The developed method is sustainable and environmentally friendly.
- This approach addresses critical challenges in leather waste management and chromium recovery.
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