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August 5, 2025The Journal of Physical Chemistry B

Selective Removal of Methyl Orange and Methylene Blue by Poly(aniline-co-metanilic acid): Investigation of Kinetics, Thermodynamics, and Isotherm of Adsorption

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Authors

SRSai Sushree RathUtkal UniversitySPSiddhartha PandaSiksha O Anusandhan UniversityBPBraja N. PatraCentre for Advanced Material Application of the Slovak Academy of Sciences

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Implication

Experimental evidence demonstrates enhanced adsorption of methyl orange and methylene blue in varied pH conditions, indicating strong potential for wastewater treatment applications.

Key Points

  • Poly(aniline-co-metanilic acid) effectively adsorbs methyl orange at low pH and methylene blue at high pH, with maximum capacities of 588.23 mg/g and 344.82 mg/g, respectively.
  • Thermodynamic analysis (ΔGo, ΔHo, ΔSo) and kinetics confirm that adsorption follows pseudo-second-order behavior, indicating strong interaction at the molecular level.
  • The Langmuir isotherm model best explains the adsorption process, suggesting uniform adsorption sites on the copolymer's surface.
  • This research highlights the potential of poly(aniline-co-metanilic acid) for environmental applications, particularly in wastewater treatment for dye removal.

Cite This Study

Rath et al. (2025) studied this question.

synapsesocial.com/papers/689522009f4f1c896c428f24https://doi.org/10.1021/acs.jpcb.5c04258
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