Removal of phosphorus using NZVI derived from reducing natural goethite

Liu, Haibo, Chen, Tianhu, Zou, Xuehua, Xie, Qiaoqing, Qing, Chengsong, Chen, Dong, & Frost, Ray L. (2013) Removal of phosphorus using NZVI derived from reducing natural goethite. Chemical Engineering Journal, 234, pp. 80-87.

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Abstract

Nano zero valent iron (NZVI) prepared by reducing natural goethite in hydrogen at 550 °C was used to remove phosphate. The effect of particle size, reaction time, NZVI dose, pH, initial phosphorus concentration, and oxygen amount in reaction system on phosphorus removal was investigated. The characterization of X-ray fluorescence (XRF), X-ray diffraction (XRD), N2 adsorption and desorption (BET analysis), transmission electron microscope (TEM), field emission scanning electron microscope with a energy dispersive X-ray detector (FESEM/EDS) and X-ray photoelectron spectroscopy (XPS) indicated that nanoscale of iron (around 80–150 nm length and 5–30 nm width) was prepared successfully with high dispersion and relative large surface area around 22 m2/g. The results of batch experiments and XPS analysis suggested that this kind of NZVI had a good performance on removal of phosphate (over 99%) despite in slightly acidic media as the initial concentration of P was 5 mg/L. The reason was ascribed to the effective corrosion of this NZVI under the function of proton and dissolved oxygen in spite of the existence of thin passive films.

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ID Code: 62804
Item Type: Journal Article
Refereed: Yes
Keywords: Natural goethite, Nanoscale particles, Zero valent iron, Phosphate removal
DOI: 10.1016/j.cej.2013.08.061
ISSN: 13858947
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2013 Elsevier B.V.
Copyright Statement: NOTICE: this is the author’s version of a work that was accepted for publication in Chemical Engineering Journal. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Chemical Engineering Journal, [Volume 234, (December 2013)] DOI: 10.1016/j.cej.2013.08.061
Deposited On: 25 Sep 2013 23:19
Last Modified: 05 Dec 2015 21:52

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