Lignin-based hyper-cross-linked resin as an adsorbent for aniline from aqueous solution

Area of Science:

• Materials Science
• Polymer Chemistry
• Environmental Science

Background:

• Lignin's unique structure makes it a suitable precursor for synthesizing functionalized hyper-cross-linked polymers (HCPs).
• These advanced materials show promise for adsorbing aromatic compounds from various matrices.

Purpose of the Study:

• To synthesize and characterize a novel hyper-cross-linked polymer using lignin and 1,3,5-triphenyl.
• To evaluate the adsorption performance of the synthesized polymer for aniline removal.

Main Methods:

• Synthesis of hyper-cross-linked polymer (HCPs-3) utilizing lignin and 1,3,5-triphenyl.
• Adsorption experiments to determine aniline uptake capacity and kinetics.
• Characterization of pore structure and surface properties.

Main Results:

• HCPs-3 exhibited a maximum adsorption capacity (qmax) of 189.2 mg/g for aniline at 303 K.
• Adsorption equilibrium was achieved rapidly, within 80 minutes.
• The pseudo-first-order kinetic model accurately described the adsorption process.
• High surface area and abundant micro/mesopores contributed to efficient adsorption.

Conclusions:

• Lignin-derived HCPs-3 are highly effective adsorbents for aniline.
• Acid-base interactions and hydrogen bonding play a key role in the adsorption mechanism.
• The synthesized material demonstrates potential for environmental remediation applications.