New, hybrid pectin-based biosorbents

Area of Science:

• Materials Science
• Environmental Science
• Biochemistry

Background:

• Pectin-based biosorbents are explored for heavy metal removal.
• Polysaccharide additives can modify biosorbent properties.
• Optimizing biosorbent structure is key for efficient pollutant capture.

Purpose of the Study:

• To synthesize and characterize hybrid pectin-based biosorbents with gellan, carob, and xanthan gum.
• To investigate the effect of additives and synthesis temperature on biosorbent morphology and homogeneity.
• To evaluate the lead and cadmium sorption capacity of the developed hybrid biosorbents.

Main Methods:

• Hybrid biosorbents synthesized using pectin and polysaccharide additives (gellan, carob, xanthan gum) at varying ratios and temperatures.
• Raman spectroscopy to confirm additive presence.
• Scanning Electron Microscopy (SEM) to analyze surface morphology and homogeneity.
• Batch sorption experiments to determine heavy metal removal capacity at pH 4-6.

Main Results:

• Successful synthesis of pectin-based hybrid biosorbents confirmed by Raman spectra.
• SEM revealed enhanced blend homogeneity and distinct structures at higher synthesis temperatures.
• Hybrid biosorbents exhibited comparable sorption capacities to pure pectin: 0.85 mmol/g for lead and 0.70 mmol/g for cadmium at pH 4-6.

Conclusions:

• Hybrid pectin-polysaccharide biosorbents are effective for lead and cadmium removal.
• Synthesis temperature influences biosorbent homogeneity and structure.
• The developed biosorbents show significant potential for heavy metal remediation in aqueous solutions.