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- W3134520797 abstract "Fe3O4, the functional component of magnetic adsorbent for separation, dissolves readily under acidic conditions, which significantly restricts its application for treatment of acidic wastewater such as acid mine drainage. Thus, this study developed a new method to improve the acid resistance of Fe3O4 by doping it with graphene oxide (GO). Firstly, the effects of GO load on the adsorption capacity and dissolution behavior of magnetic hydroxyapatite (MP) and magnetic GO-hydroxyapatite (PMGO) under acidic environment were investigated. Then, as a novel adsorbent, PMGO was characterized by SEM, EDS, XPS, FTIR, Raman, XRD, BET, TGA and VSM, meanwhile its adsorption mechanism and practicability were explored. It is found that the load of GO in PMGO enhanced the specific surface area from 84.21 (MP) to 158.72 m2/g (PMGO), the pore size was reduced from 21.10 to 0.41 nm, the adsorption capacity was increased from 178.40 to 274.73 mg/g. At pH of 2.06, MP was tough to recycle, while PMGO still maintained 90.10% magnetism, suggesting that the addition of GO into MP reduced its dissolution under acidic conditions. Moreover, with a favorable application potential, PMGO after 5 cycles of reuse still possessed 97.49 mg/g adsorption capacity. This study developed a GO doped magnetic adsorbent with significantly improved acid resistance, allowing magnetic adsorbent to be applied under acidic conditions. The findings have promising application in mine industry for heavy metal ion removal from acidic mining drainage." @default.
- W3134520797 created "2021-03-15" @default.
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- W3134520797 date "2021-08-01" @default.
- W3134520797 modified "2023-10-06" @default.
- W3134520797 title "Pb(Ⅱ) adsorption characteristics of magnetic GO-hydroxyapatite and the contribution of GO to enhance its acid resistance" @default.
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- W3134520797 doi "https://doi.org/10.1016/j.jece.2021.105310" @default.
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