Issue 9, 2011

One-step synthesis of mesoporous two-line ferrihydrite for effective elimination of arsenic contaminants from natural water

Abstract

Mesoporous two-line (2-lines) ferrihydrite is successfully synthesized by a facile one-step method. The ferrihydrite is characterized by X-ray diffraction (XRD), Raman spectrum, N2 adsorption, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The 2-lines ferrihydrite with mesoporous structure possesses excellent adsorption performance for arsenic (As(III)) contamination. Experimental results show that As(III) contamination can be effectively removed within 2 h by this 2-lines ferrihydrite, which is attributed to the special mesoporous structure and large surface area (133 m2 g−1). The As(III) loading capacity of our obtained mesoporous 2-lines ferrihydrite is up to 128 mg(As) g−1(Fe). In addition, As(III) can be easily desorbed from 2-lines ferrihydrite by simple heat treatment in alkali solution. After reusage for 10 times, it still presents good adsorption performance, indicating the excellent stability of the 2-lines ferrihydrite. Furthermore, the mesoporous 2-lines ferrihydrite is also effective for As(III) removal when some natural water constituents are present. Therefore, the high adsorption capability of the mesoporous 2-lines ferrihydrite makes it a potentially attractive adsorbent for the removal of As(III) contamination from natural water.

Graphical abstract: One-step synthesis of mesoporous two-line ferrihydrite for effective elimination of arsenic contaminants from natural water

Article information

Article type
Paper
Submitted
01 Sep 2010
Accepted
26 Nov 2010
First published
28 Jan 2011

Dalton Trans., 2011,40, 2062-2066

One-step synthesis of mesoporous two-line ferrihydrite for effective elimination of arsenic contaminants from natural water

Z. Li, T. Zhang and K. Li, Dalton Trans., 2011, 40, 2062 DOI: 10.1039/C0DT01138J

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