▎ 摘　　要

This first attempt study explored newly prepared materials for promising As(III) treatment with easily recycling characteristics for sustainable uses. Regarding layered GOs they had appropriate capabilities for practicability; significantly increased large GO layers could be served as precursor and stabilizer of other materials due to excellent electron transfer capacities. Titanium nano tube (TNT) catalysts were prepared to augment surface areas for maximal adsorption capacities. TNT-doped graphene (GN-TNT) was then prepared by hydrothermal method. In addition, GN-TNT was coated with magnetic nano particles (MNP) to yield mesoporous composites to be easily recycled under a magnet. Ternary mixture design of experiments was implemented to determine optimal ratios of GN-MNP-TNT to remove As(III) in solutions. To have detailed characteristics of the morphology and composition, X-ray diffraction, atomic force microscopy and transmission electron microscopy were implemented. Resuability of GN-MNP-TNT composites had also been tested for 4 serial cycles of adsorption/desorption of As(III). Compared to graphenebased materials, the most appropriate rate of As(III) adsorption rate was 0.057 min(-1). In addition, treatment efficiency of As(III) after 4 cycle of regeneration still remained at 83%, significantly higher than literature for promising practicability. (C) 2016 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.