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A multifunctional carrier made of polyaniline-macroporous adsorption resin is used to treat phenolic wastewater in an anaerobic fluidized bed microbial fuel cell, showing improved treatment efficiency and adsorption capacity.

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What they did

System
MFC

What worked

Power density131mW/m²

Abstract

Abstract The modified resin is used as a multifunctional biological carrier to treat phenolic wastewater (PW) in an anaerobic fluidized bed microbial fuel cell (AFB‐MFC). First, the modified resin was prepared, and the conductive polyaniline (PANI) was polymerized in situ on the surface and pores of the macroporous adsorption resin (MAR) to prepare the modified resin composite material (MAR/PANI). A series of modified resins with different mass ratios of resin and aniline were prepared. The modified resins were characterized by Fourier‐transform infrared spectroscopy, scanning electron microscopy (SEM), specific surface area, and pore structure analysis. Materials Studio (MS) software was used to study the internal interaction forces of PANI and MAR, and the molecular dynamics simulation method was used to analyze and calculate the cohesive energy density. The simulation results are qualitatively consistent with the experimental data. The sorption module in the MS software was used to study the adsorption behaviour of the modified resin to the organic components in the wastewater, and the adsorption mechanism was explained on the atomic scale. When the modified resin with m (MAR):m(An) = 1:0.6 was used in the AFB‐MFC, the chemical oxygen demand removal efficiency of wastewater was increased by 26.2%–88.90%, the voltage was increased by 98.46%–489.2 mV, and power density was increased by 303.28%–131.43 ± 0.17 mW/m 2 .

Key findings

  • The modified resin composite material (MAR/PANI) shows enhanced conductivity and adsorption capacity compared to the original macroporous adsorption resin.
  • The molecular dynamics simulation method confirms the internal interaction forces between PANI and MAR, and the cohesive energy density is calculated.
  • The sorption module in Materials Studio software simulates the adsorption behavior of the modified resin to organic components in the wastewater, explaining the adsorption mechanism on the atomic scale.

Keywords

AdsorptionPolyanilineChemical engineeringFourier transform infrared spectroscopySorptionPolymerization

Identifiers

DOI
10.1002/cjce.24847
Journal
The Canadian Journal of Chemical Engineering
Year
2023