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Adsorbents used in adsorption processes play an important role in wastewater treatment technologies. It is therefore of interest how manufactured adsorbents can perform better or be more efficient. Is the adsorption capacity a sufficient indicator to select a good adsorbent? In this study, two nanoadsorbents of Hg(II) were successfully synthesized. They are magnetic graphene oxide (MGO-NH-SH) and magnetic nanoparticle (Fe3O4@SiO-NH-SH), both functionalized with a thiol group, acetylcysteine. The nanoadsorbents, in addition to their adsorption capacity, were investigated from the viewpoints of reuse and regeneration, economic costs, and environmental impact (carbon footprint). The prepared nanoadsorbents were characterized by FTIR, XRD, TGA, FE-SEM, VSM, AFM, Raman, and elemental analysis. Their adsorption of Hg(II) fits well with the Langmuir isotherm model and follows the pseudo-second-order kinetics. Under optimal conditions, the results of Hg(II) removal from real wastewater and polluted water by MGO-NH-SH exhibited a higher adsorption capacity, reuse, and regeneration, and as well lower cost and greenhouse gas emissions compared to Fe3O4@SiO-NH-SH. The findings of the present study highlight that MGO-NH-SH as a promising adsorbent is more economically and environmentally friendly than Fe3O4@SiO-NH-SH in the efficient removal of Hg(II) from real wastewater and polluted water.
Original languageEnglish
JournalJournal of the Taiwan Institute of Chemical Engineers
Pages (from-to)78-93
Publication statusPublished - 2019
CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

  • Adsorption process, Economic costs, Environmental impacts, Reuse, Thiol-functionalized MGO and Fe3O4

ID: 169760279