Issue 66, 2015

Superior As(iii) removal performance of hydrous MnOOH nanorods from water

Abstract

Hydrous manganite (MnOOH) nanorods were synthesized by a simple precipitation process in ethanol at room temperature, which eliminated high temperature calcination or a hydrothermal process in the creation of most manganese oxide-based adsorbents and resulted in low energy consumption and subsequently low production cost. These MnOOH nanorods had a high specific surface area at ∼165.9 m2 g−1 and their total pore volume was ∼0.561 cm3 g−1, which was beneficial to their arsenic removal performance. These MnOOH nanorods demonstrated a superior As(III) removal performance from an aqueous environment. At near neutral conditions (pH ∼ 7), their arsenic adsorption capacity was over 431.2 mg g−1, which was among the highest reported values in the literature. The superior As(III) removal performance of these MnOOH nanorods relied on the adsorption and subsequent oxidation of As(III) to less mobilized/toxic As(V), and its fixation on their surface to form inner-sphere arsenic surface complexes.

Graphical abstract: Superior As(iii) removal performance of hydrous MnOOH nanorods from water

Supplementary files

Article information

Article type
Paper
Submitted
16 May 2015
Accepted
10 Jun 2015
First published
11 Jun 2015

RSC Adv., 2015,5, 53280-53288

Superior As(III) removal performance of hydrous MnOOH nanorods from water

S. Guo, W. Sun, W. Yang, Q. Li and J. K. Shang, RSC Adv., 2015, 5, 53280 DOI: 10.1039/C5RA09157H

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