Effective adsorption of malachite green using magnetic barium phosphate composite from aqueous solution

Fan Zhang, Zhong Wei, Wanning Zhang, Haiyan Cui

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Magnetic Ba3(PO4)2/Fe3O4-nanoparticle (called BPFN) was prepared, characterized, and developed as a low-cost adsorbent for malachite green (MG) from aqueous solution. Factors such as adsorption temperature, pH of solution, dosage of adsorbent, adsorption kinetics and isotherms were investigated. The maximum adsorption capacity obtained in this work was 1639 mg g− 1 at 45 °C and pH 6. The adsorption process fitted the pseudo-first-order kinetic model and Langmuir isotherm model. Evidences from zeta potential, Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS) data revealed that the adsorption process was driven by electrostatic attraction, the interaction between Lewis base [sbnd]N(CH3)2 in MG and Lewis acid Ba sites of BPFN. In addition, the BPFN could be easily regenerated by a magnet and the adsorption capacity maintained at 70% after five cycles. The present study suggests that the BPFN had high potential of removing MG from wastewater.

Original languageEnglish (US)
Pages (from-to)116-122
Number of pages7
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume182
DOIs
StatePublished - Jul 5 2017

Keywords

  • Adsorption
  • Magnetic composite
  • Malachite green
  • Mechanism

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