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REMOVAL OF HG2+ AND METHYLMERCURY IN WATERS BY FUNCTIONALIZED MULTI-WALLED CARBON NANOTUBES: ADSORPTION BEHAVIOR AND THE IMPACTS OF SOME ENVIRONMENTALLY RELEVANT FACTORS
Zhang, D., Y. Yin, and J. Liu.
Chemical Speciation & Bioavailability 29(1):161-169(2017)

A study of the adsorption of Hg2+ and methylmercury (MeHg) to multi-walled carbon nanotubes (MWCNTs) modified, respectively, with hydroxyl, amine, and carboxyl groups evaluated the effect of factors such as initial pH, natural organic matter (NOM), Cl-, and adsorbent dose on sorption efficiency. The amine-modified MWCNTs showed a strong adsorption capacity to Hg2+ and MeHg, and the removal efficiency could reach up to 92% (0.5 g/L MWCNTs, and 100 µg/L Hg2+ and MeHg) independent of pH. NOM had complex effects on the adsorption of Hg2+ and MeHg to MWCNTs. Cl- inhibited the adsorption of Hg2+ and MeHg to MWCNTs. Adsorption of Hg2+ and MeHg was found to be inhomogeneous and homogeneous chemisorption, respectively. https://www.tandfonline.com/doi/pdf/10.1080/09542299.2017.1378596



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