Vanadium(V) removal from aqueous solution and real wastewater using quaternized pine sawdust

Area of Science:

• Environmental Science
• Materials Science
• Chemical Engineering

Background:

• Vanadium contamination in industrial wastewater poses environmental risks.
• Effective and sustainable methods for vanadium removal are needed.
• Pine sawdust is an abundant lignocellulosic biomass resource.

Purpose of the Study:

• To evaluate the efficacy of cross-linked and quaternized pine sawdust for vanadium removal.
• To determine the vanadium sorption capacity in synthetic and real industrial wastewater.
• To assess the reusability of the modified pine sawdust for vanadium remediation.

Main Methods:

• Pine sawdust was modified through cross-linking and quaternization.
• Batch experiments were conducted to test vanadium removal from synthetic and real wastewater.
• Column studies were performed to evaluate desorption and reusability.

Main Results:

• The modified pine sawdust exhibited a maximum vanadium sorption capacity of 130 mg/g in synthetic solution and 103 mg/g in real wastewater.
• Effective vanadium removal was observed across a wide pH range.
• Vanadium was efficiently desorbed using 2 M NaOH, and the material demonstrated good reusability.

Conclusions:

• Cross-linked and quaternized pine sawdust is a highly effective adsorbent for vanadium removal from industrial wastewater.
• The material shows excellent sorption capacity, broad pH applicability, and reusability, making it a sustainable option for vanadium remediation.