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Rice Husk-Based Adsorbents for Removal of Metals from Aqueous Solutions
Svetlana Yefremova1, Askhat Kablanbekov1,2, Baimakhan Satbaev3
1National Center on Complex Processing of Mineral Raw Materials of the Republic of Kazakhstan RSE, Almaty 050036, Kazakhstan.
Materials (Basel, Switzerland)
|December 9, 2023
Summary
Rice husk is a promising, eco-friendly material for water purification. Its abundant functional groups enable effective removal of various metals and radionuclides from contaminated water sources.
Area of Science:
- Environmental Science
- Materials Science
- Chemistry
Background:
- Adsorption is a key water purification technique requiring advanced, sustainable adsorbents.
- Plant-derived polymers offer eco-friendly alternatives to conventional adsorbent materials.
- Rice husk is abundant, low-cost, and rich in active sites for pollutant removal.
Purpose of the Study:
- To review the use of rice husk and its derivatives as adsorbents for water purification.
- To summarize research on rice husk's effectiveness in removing diverse contaminants.
- To identify future research directions for rice husk-based adsorbents.
Main Methods:
- Review of numerous studies on rice husk adsorption.
- Analysis of heat and chemical treatment methods to enhance rice husk properties.
- Evaluation of unmodified and modified rice husk performance.
Main Results:
- Rice husk effectively removes non-ferrous, ferrous, minor, precious, rare-earth metals, and radionuclides.
- Modified rice husk sorbents demonstrate improved adsorption capacities.
- Applications span artificial solutions, industrial wastewater, and natural contaminated water.
Conclusions:
- Rice husk is a versatile and effective biosorbent for various water pollutants.
- Further research can optimize rice husk treatments for enhanced purification efficiency.
- Development of rice husk-based adsorbents aligns with sustainable water treatment goals.
Keywords:
adsorbentadsorptionbiosorbentheavy metals’ uptakepreciousradionuclides’ removalrare and rare-earth metals’ concentration and preconcentrationrice huskwater purificationMore Related Videos
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