Characteristics of a novel adsorbent Fe-Mg-type hydrotalcite and its adsorption capability of As(III) and Cr(VI) from aqueous solution

摘要

In the present study, we prepared a newly adsorbent, Iron-Magnesium-type hydrotalcite (FHT), at different molar ratios (FHT3.0; Mg2+/Fe3+ = 3.0 and FHT5.0; Mg2+/Fe3+ = 5.0) for removing heavy metal ions. Characteristics of FHT and arsenite (As(III)) and hexavalent chromium (Cr(VI)) adsorption capability onto that were evaluated. Amount adsorbed of As(III) and Cr(VI) increased with raising temperatures. Amount adsorbed of heavy metal ions onto FHT in the single liquid phase was smaller than that in the mixed liquid phase, which suggests that the amount adsorbed was affected by the adsorbent properties, interlayer space, and solution pH. (C) 2017 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.