Clean and facile solution synthesis of iron(III)-entrapped gamma-alumina nanosorbents for arsenic removal.
Iro (III)-entrapped gamma-alumina nanosorbents were prepared by an environmentally benign method using an ionothermal process based on an ionic liquid to synthesize the gamma-alumina host and a sonochemical method to entrap the iron(III) guest. The morphology of the alumina depends on the aluminum precursor used, giving aligned bundled and randomly debundled gamma-alumina nanorods as well as wormlike mesoporous alumina. In particular, the rodlike structure shows significantly greater mesoporosity than the wormlike porous gamma-alumina structure. Moreover, entrapment of iron(III) in the gamma-alumina nanosorbents with randomly debundled rodlike structures leads to the greatest AsV removal capacity and the fastest adsorption rate as compared to the other FeIII-entrapped adsorbents, as a result of its larger surface area and pore sizes. Thus, this method provides a clean and effective route to an advanced host-guest adsorbent system for application in the removal of arsenic from drinking water.
Park
Ho Seok
HS
Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Yusong-gu, Daejeon, Korea.
Lee
Young-Chul
YC
Choi
Bong Gill
BG
Hong
Won Hi
WH
Yang
Ji-Won
JW
D000327:Adsorption; D000537:Aluminum Oxide / Q000138:chemical synthesis* / Q000737:chemistry; D001151:Arsenic / Q000737:chemistry / Q000302:isolation & purification* / Q000633:toxicity; D003247:Conservation of Natural Resources; D007501:Iron / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification* / Q000633:toxicity
D014874:Water Pollutants, Chemical; D007501:Iron; D000537:Aluminum Oxide; D001151:Arsenic