title: Modification of Multilayer Carbon Nanotubes for the Removal of Arsenate.
abstract: The aim of this study was to explore a new nano-composite carbon adsorbent material for the removal of arsenic from water. The multilayer carbon nanotubes (MCNTs) were treated with different acids and/or modified with iron to create more surface COOH sites or Fe-impregnated MCNTs for the enhanced uptake of As(V). Tests were conducted as a function of initial As(V) concentrations, contact time, and solution pH. The coverage of ferric hydroxides on MCNTs and the uptake of As on Fe-MCNTs were independently confirmed by field emission scanning electron microscope and energy dispersive X-ray spectroscopy analyses. With an As(V) uptake capacities of 27 mg/g on Fe-MCNTs and 14 mg/g on acid-MCNTs, the material showed superior performance for As(V) removal.
authors.forename: Libinq
authors.initials: L
authors.lastname: Liao
authors.forename: Gin-Lung
authors.initials: GL
authors.lastname: Liu
authors.forename: Jiin-Shuh
authors.initials: JS
authors.lastname: Jean
authors.forename: Wei-Teh
authors.initials: WT
authors.lastname: Jiang
authors.forename: Zhaohui
authors.initials: Z
authors.lastname: Li