Peanut-Like Hematite Prepared by a New Facile Hydrothermal Process for Removal of As(V)

Abstract

Peanut-like hematite has been prepared by a new facile hydrothermal method and applied in the adsorption removal of As(V). The structural features of the as-prepared hematite were characterized systematically by X-ray diffraction, X-ray photoelectron spectroscopy, Brunauer-Emmett-Teller, scanning electron microscopy, energy-dispersive X-ray spectroscopy mapping, Fourier transform infrared spectroscopy, and transmission electron microscopy. Results showed that the morphologies of hematite could be tuned to spindle-like, oval-like, and cantaloupe-like shapes by adjusting the hydrothermal conditions. The peanut-like hematite formation followed a five-step route. At pH = 3, the adsorption amount of As(V) over peanut-like hematite reached 13.84 mg/g, and the adsorption kinetic process corresponded to the pseudo-second-order kinetic model. The peanut-like hematite also showed partial selectivity over As(V) in the hydrosphere. This method can be a reference for the preparation of other architectural metal oxide materials.

Influence of CMC, HPMC, and CNF on Performance of Corrugated Base Paper

“…The characteristic peaks of lignin are observed at 1515 cm À 1 and 1630 cm À 1 . [27,28] Lignin's infrared spectrum is the most complex, containing various infrared-sensitive functional groups such as methoxyl (-CH 3 O), hydroxyl (-OH), carbonyl (C=O), double bond (C=C), and benzene ring vibrations.…”