Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Amine Decorated Methacrylic Acid based Inverse Vulcanized Polysulfide for Effective Mercury Removal from Wastewater

Version 1 : Received: 20 April 2023 / Approved: 21 April 2023 / Online: 21 April 2023 (10:14:56 CEST)

A peer-reviewed article of this Preprint also exists.

Ghumman, A.S.M.; Shamsuddin, R.; Alothman, Z.A.; Waheed, A.; Aljuwayid, A.M.; Sabir, R.; Abbasi, A.; Sami, A. Amine-Decorated Methacrylic Acid-Based Inverse Vulcanized Polysulfide for Effective Mercury Removal from Wastewater. ACS Omega 2024, doi:10.1021/acsomega.3c08361. Ghumman, A.S.M.; Shamsuddin, R.; Alothman, Z.A.; Waheed, A.; Aljuwayid, A.M.; Sabir, R.; Abbasi, A.; Sami, A. Amine-Decorated Methacrylic Acid-Based Inverse Vulcanized Polysulfide for Effective Mercury Removal from Wastewater. ACS Omega 2024, doi:10.1021/acsomega.3c08361.

Abstract

Mercury (Hg (II)) contamination is indefatigable global hazard which causes severe permanent damages to human health. Extensive research has been carried out to produce mercury adsorbents however they are still facing certain challenges limiting their upscaling. Herein we reported the synthesis of novel amine impregnated inverse vulcanized copolymer for effective mercury removal. Poly(S-MA) was prepared using sulfur and methacrylic acid employing inverse vulcanization method following by functionalization. The polyethylenime (PEI) was impregnated on poly(S-MA) to increase the adsorption active sites. The developed adsorbent was then characterized using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). FTIR confirmed formation of copolymer and successful impregnation of PEI and SEM revealed composite porous morphology of the copolymer. Amine impregnated copolymer (amine@poly(S-MA)) outperformed poly(S-MA) in mercury as it showed 20 % superior performance with 44.7 mg/g maximum adsorption capacity. The adsorption data best fits the pseudo second order which indicates that the chemisorption is most influential mechanism in this case indicating the involvement of NH2 in mercury removal. The adsorption is mainly monolayer on homogenous surface as indicated by 0.76 value of Redlich-Peterson exponent (g) which describes the adsorption nature advent from R2 value of 0.99.

Keywords

amine impregnation; inverse vulcanization; adsorption; mercury removal; sustainability; sulfur polymers

Subject

Chemistry and Materials Science, Chemical Engineering

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