Facial synthesis of colloidal stable magnetic nanoparticles coated with high hydrophilic negative charged poly(4-styrenesulfonic acid co-maleic acid) sodium for water remediation

Chuan Chuan Lim, Qi Hwa Ng*, Peng Yong Hoo*, Siti Kartini Enche Ab Rahim, Mohd Riduan Jamalludin, Amira Mohd Nasib, Sigit Tri Wicaksono, Azzah Dyah Pramata, Siti Zullaikah

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The enhancement of the colloidal stability of magnetite nanoparticles (MNPs) for environmental-related fields has greatly attracted researchers' attention. This study used a high hydrophilic negatively charged polyelectrolyte, poly(4-styrenesulfonic acid co-maleic acid) sodium (PSAAS), to enhance the colloidal stability of MNPs. Coating of the naked MNPs with PSAAS polyelectrolyte is a simple and rapid method to obtain colloidally stable MNPs while sustaining the chemical reactivity of MNPs in water purification. The prepared PSAAS-coated MNPs were characterized by scanning electron microscope, energy dispersive X-ray, Fourier transform infrared, zeta potential analysis, transmission electron microscope and X-ray diffraction. Moreover, the colloidal stability and adsorption performance tests of these naked MNPs and PSAAS-coated MNPs (with different concentrations of PSAAS coated) were investigated and compared. PSAAS-coated MNPs with 0.001 g/ml PSAAS coating possessed the best colloidal stability and the highest methylene blue (MB) dye removal efficiency (94.53 ± 0.69%). The adsorption isotherm and kinetic studies for the adsorption of MB onto PSAAS-coated MNPs were well-described by the Langmuir model and pseudo-second-order kinetic model. These magnetic adsorbents, with high separation efficiency, simple and low production cost and recyclable property, are promising as practicable adsorbents in water treatment.

Original languageEnglish
Pages (from-to)1341-1357
Number of pages17
JournalPolymers for Advanced Technologies
Volume34
Issue number4
DOIs
Publication statusPublished - Apr 2023

Keywords

  • adsorption
  • iron oxide
  • methylene blue
  • polymer coating
  • reusable

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