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Application of near infrared spectroscopy for the determination of adsorbed p-nitrophenol on HDTMA organoclay –implications for the removal of organic pollutants from water

Frost, Ray L., Zhou, Qin, Xi, Yunfei, & He, Hongping (2008) Application of near infrared spectroscopy for the determination of adsorbed p-nitrophenol on HDTMA organoclay –implications for the removal of organic pollutants from water. Spectrochimica Acta Part A : Molecular and Biomolecular Spectroscopy, 69(3), pp. 835-841.

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Abstract

NIR spectroscopy has been used to measure the adsorption of p-nitrophenol on untreated montmorillonite and surfactant exchanged montmorillonite. P-nitrophenol is characterised by an intense NIR band at 8890 cm-1 which shifts to 8840 cm-1 upon adsorption on organoclay. The band was not observed for p-nitrophenol adsorbed on untreated montmorillonite. Both the montmorillonite and the surfactant modified montmorillonite are characterised by NIR bands at 7061 and 6791 cm-1. The organoclay is characterised by two prominent bands at 5871 and 5667 cm-1 assigned to the fundamental overtones of the mid-IR bands at 2916 and 2850 cm-1. A band at 6017 cm-1 is attributed to the p-nitrophenol adsorbed on the organoclay. The band is not observed for the montmorillonite with adsorbed p-nitrophenol. It is concluded that p-nitrophenol is adsorbed to significantly greater amounts on the organoclay compared with the untreated montmorillonite. The implication is that organoclays are most useful for removing organic molecules from water through adsorption.

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26 citations in Web of Science®

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ID Code: 11317
Item Type: Journal Article
Keywords: adsorption, NIR and mid, IR spectroscopy, p, nitrophenol, organoclay, montmorillonite, overtone and combination bands
DOI: 10.1016/j.saa.2007.05.037
ISSN: 1386-1425
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Catalysis and Mechanisms of Reactions (030601)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Colloid and Surface Chemistry (030603)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2008 Elsevier
Copyright Statement: Reproduced in accordance with the copyright policy of the publisher.
Deposited On: 07 Jan 2008
Last Modified: 29 Feb 2012 23:48

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