Degradation of endocrine disruptor, bisphenol-A, on an mixed oxidation state manganese oxide/modified graphite oxide composite: A role of carbonaceous phase

Hayarpi S Saroyan; Sotiria Bele; Dimitrios A Giannakoudakis; Victoria F Samanidou; Teresa J Bandosz; Eleni A Deliyanni

doi:10.1016/j.jcis.2018.12.088

Degradation of endocrine disruptor, bisphenol-A, on an mixed oxidation state manganese oxide/modified graphite oxide composite: A role of carbonaceous phase

J Colloid Interface Sci. 2019 Mar 15:539:516-524. doi: 10.1016/j.jcis.2018.12.088. Epub 2018 Dec 26.

Authors

Hayarpi S Saroyan¹, Sotiria Bele¹, Dimitrios A Giannakoudakis², Victoria F Samanidou³, Teresa J Bandosz⁴, Eleni A Deliyanni⁵

Affiliations

¹ Laboratory of Chemical and Environmental Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece.
² Department of Chemistry and Biochemistry, The City College of New York, New York, NY 10031 USA. Electronic address: dagchem@gmail.com.
³ Laboratory of Analytical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece.
⁴ Department of Chemistry and Biochemistry, The City College of New York, New York, NY 10031 USA.
⁵ Laboratory of Chemical and Environmental Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece. Electronic address: lenadj@chem.auth.gr.

PMID: 30611047
DOI: 10.1016/j.jcis.2018.12.088

Abstract

Modified graphite oxide (ΝGO) was used as a support of a manganese oxide of hausmannite type (Mn₃O₄) nanocatalyst and applied for the degradation of an endocrine disruptor, bisphenol-A (BPA). The prepared nanocomposite/catalyst (NGO-Mn₃O₄), as well as pure modified graphite oxide and manganese oxide, were characterized by X-ray diffraction, Scanning Electron Microscopy, nitrogen adsorption, X-ray photoelectron spectroscopy, Fourier Transform Infrared Spectroscopy, and potentiometric titration. The maximum removal activity for all the materials was measured at pH = 3. The NGO-Mn₃O₄ nanocomposite showed the highest removal efficiency of BPA at an ambient temperature without light irradiation and/or the addition of chemicals, which can be attributed to the synergistic effect of the composite formation. The nanocomposite exhibited a high catalytic activity for the degradation/oxidation of BPA, which was dramatically higher than that of the pristine Mn₃O₄ phase. Modified graphite oxide showed also an enhanced capability for the BPA removal, which was linked to an increased physical adsorption component.

Keywords: Bisphenol A; Manganese oxide nanoparticles; Modified graphite oxide; Pharmaceuticals reactive adsorption; Water purification.