Pb(Ⅱ) adsorption characteristics of magnetic GO-hydroxyapatite and the contribution of GO to enhance its acid resistance

Fe3O4, the functional component of magnetic adsorbent for separation, dissolves readily under acidic conditions, which significantly restricts its application treatment wastewater such as acid mine drainage. Thus, this study developed a new method to improve resistance Fe3O4 by doping it with graphene oxide (GO). Firstly, effects GO load on adsorption capacity and dissolution behavior hydroxyapatite (MP) GO-hydroxyapatite (PMGO) environment were investigated. Then, novel adsorbent, PMGO was characterized SEM, EDS, XPS, FTIR, Raman, XRD, BET, TGA VSM, meanwhile mechanism practicability explored. It is found that in enhanced specific surface area from 84.21 158.72 m2/g (PMGO), pore size reduced 21.10 0.41 nm, increased 178.40 274.73 mg/g. At pH 2.06, MP tough recycle, while still maintained 90.10% magnetism, suggesting addition into conditions. Moreover, favorable potential, after 5 cycles reuse possessed 97.49 mg/g capacity. This doped improved resistance, allowing be applied The findings have promising industry heavy metal ion removal mining