Biosorbents for heavy metals removal and their future

Area of Science:

• Environmental Science
• Biotechnology
• Materials Science

Background:

• Biological materials (bacteria, algae, yeasts, fungi) show promise for heavy metal removal and recovery.
• Biosorbents offer a cost-effective and efficient alternative to traditional ion exchange resins.
• These materials possess diverse functional groups facilitating metal ion binding.

Purpose of the Study:

• To review widely used biosorbents for heavy metal removal.
• To focus on cellular structure, performance, pretreatment, modification, and regeneration.
• To explore biosorption modeling, novel biosorbent development, and future applications.

Main Methods:

• Literature review and analysis of research results.
• Evaluation of biosorbent pretreatment and modification strategies.
• Discussion of molecular biotechnology for mechanism elucidation and engineered organisms.

Main Results:

• Biosorbents exhibit varied functional sites for effective metal ion binding.
• Pretreatment and modification can enhance biosorption capacity.
• Molecular biotechnology offers pathways for improved biosorbent performance and selectivity.

Conclusions:

• Biosorption is a viable technology for heavy metal removal, with ongoing research into novel materials.
• Future trends include hybrid technologies and commercialization of immobilized biosorbents.
• Enhancing regeneration/reuse and market development are key for widespread application.