Chemically functionalized silica gel with alkynyl terminated monolayers as an efficient new material for removal of mercury ions from water

摘要

An efficient new material for removal of mercury from water was prepared by the chemically functionalization of silica gel. Various monolayers were grafted on the silica gel surface to attach terminal alkynyl groups. All modified surfaces were characterized by XPS, ATR-IR and elemental analysis while Hg2+ concentrations were determined by ICP-OES. The Hg2+ adsorption reached equilibrium within 2 h with maximum adsorption capacities of 174.3 mg g(-1) for alkynyl monolayers functionalized silica gel. Due to relatively lower price of silica gel, it can be efficiently used after functionalization on large scale to remove Hg2+ ions from the wastewater. (C) 2016 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.