A review on heavy metal biosorption utilizing modified chitosan.

Area of Science:

• Environmental Science
• Materials Science
• Chemical Engineering

Background:

• Heavy metal pollution in water bodies poses a significant global environmental and public health risk.
• Wastewater containing heavy metal ions is a primary source of contamination in aquatic systems and groundwater.
• Adsorption is recognized as a highly effective method for removing metal contaminants from drinking water.

Purpose of the Study:

• To review the principles of biosorption and its application in heavy metal removal using chitosan-based materials.
• To explore the use of modified chitosan (physically and chemically), blends, and composites for water remediation.
• To identify key aspects of chitosan adsorbents that can improve their heavy metal removal efficiency.

Main Methods:

• Review of existing literature on biosorption mechanisms and chitosan modification techniques.
• Analysis of different chitosan architectures, blends, and composites for heavy metal adsorption.
• Evaluation of the characteristics and performance of chitosan-based adsorbents.

Main Results:

• Chitosan exhibits exceptional adsorption capabilities for various hazardous heavy metals from aqueous solutions.
• Modified chitosan, including blends and composites, demonstrates enhanced adsorption performance.
• Various physical and chemical modifications significantly improve chitosan's efficiency in heavy metal removal.

Conclusions:

• Chitosan-based adsorbents are promising materials for the effective removal of heavy metal pollutants from water.
• Understanding the properties of modified chitosan is crucial for optimizing its application in water treatment.
• Further development and application of chitosan materials can contribute to mitigating heavy metal contamination in water bodies.