Synthesis, flocculation and adsorption performance of amphoteric starch

Area of Science:

• Polymer Chemistry
• Materials Science
• Environmental Science

Background:

• Starch-based polymers are increasingly explored for water treatment applications.
• Developing efficient and eco-friendly flocculants is crucial for environmental remediation.
• Amphoteric copolymers offer unique properties for pollutant removal.

Purpose of the Study:

• To synthesize a novel amphoteric copolymer flocculant from starch.
• To characterize the synthesized copolymer using various analytical techniques.
• To evaluate the flocculation performance for methyl violet and adsorption capacity for Pb(II).

Main Methods:

• Microwave-assisted synthesis of starch-based amphoteric copolymer incorporating cationic (GTA) and anionic (phosphate) moieties.
• Characterization using FTIR, 1H NMR, SEM, molecular mass analysis, swelling power, and solubility index.
• Evaluation of flocculation efficiency in methyl violet solution and Pb(II) adsorption via jar tests.

Main Results:

• The amphoteric copolymer demonstrated effective flocculation of methyl violet, primarily through charge neutralization and interchain bridging.
• Adsorption of Pb(II) was significantly influenced by pH, adsorption time, and initial Pb(II) concentration.
• Successful synthesis and characterization of the novel starch-based amphoteric copolymer were confirmed.

Conclusions:

• The synthesized amphoteric copolymer is a highly effective flocculant and adsorbent for water treatment.
• The study highlights the potential of microwave-assisted synthesis for creating functional starch-based materials.
• This novel copolymer presents a sustainable solution for removing organic dyes and heavy metals from wastewater.