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Title: Near-infrared turbidity of beta-FeOOH particle suspensions

Abstract

Near-infrared transmission spectroscopy can be complicated by the light scattering from heterogeneous materials. To examine an evolving system exhibiting such light scattering, transmission spectra are obtained during the hydrolysis of iron chloride solutions. At first, the resulting turbid suspension of cigar-shaped beta-FeOOH particles exhibits single-particle scattering, including a Rayleigh regime (attenuation proportional to the fourth power of the wavenumber). At later times, the scattering increases strongly as the particles aggregate, and becomes proportional to the wavenumber squared, consistent with scattering models which interpret the structure of aggregates in terms of a fractal dimension roughly equal to 2.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Director, Office of Science. Office of Biological and Environmental Research (US)
OSTI Identifier:
791180
Report Number(s):
LBNL-43582
Journal ID: ISSN 0003-7028; APSPA4; R&D Project: 578301; TRN: US200203%%287
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Journal Article
Journal Name:
Applied Spectroscopy
Additional Journal Information:
Journal Volume: 54; Journal Issue: 2; Other Information: Journal Publication Date: Feb. 2000; PBD: 1 Sep 1999; Journal ID: ISSN 0003-7028
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ATTENUATION; HYDROLYSIS; IRON CHLORIDES; LIGHT SCATTERING; INFRARED SPECTRA; SPECTROSCOPY; TURBIDITY; SUSPENSIONS; IRON HYDROXIDES; NEAR INFRARED RADIATION; NEAR-INFRARED SPECTROSCOPY NIR LIGHT SCATTERING FRACTAL AGGREGATES BETA-FEOOH PARTICLES FECL3 HYDROLYSIS AKAGANEITE

Citation Formats

Berdahl, P., Espinoza, L.H., Littlejohn, D., Lucas, D., and Perry, D.L. Near-infrared turbidity of beta-FeOOH particle suspensions. United States: N. p., 1999. Web.
Berdahl, P., Espinoza, L.H., Littlejohn, D., Lucas, D., & Perry, D.L. Near-infrared turbidity of beta-FeOOH particle suspensions. United States.
Berdahl, P., Espinoza, L.H., Littlejohn, D., Lucas, D., and Perry, D.L. Wed . "Near-infrared turbidity of beta-FeOOH particle suspensions". United States.
@article{osti_791180,
title = {Near-infrared turbidity of beta-FeOOH particle suspensions},
author = {Berdahl, P. and Espinoza, L.H. and Littlejohn, D. and Lucas, D. and Perry, D.L.},
abstractNote = {Near-infrared transmission spectroscopy can be complicated by the light scattering from heterogeneous materials. To examine an evolving system exhibiting such light scattering, transmission spectra are obtained during the hydrolysis of iron chloride solutions. At first, the resulting turbid suspension of cigar-shaped beta-FeOOH particles exhibits single-particle scattering, including a Rayleigh regime (attenuation proportional to the fourth power of the wavenumber). At later times, the scattering increases strongly as the particles aggregate, and becomes proportional to the wavenumber squared, consistent with scattering models which interpret the structure of aggregates in terms of a fractal dimension roughly equal to 2.},
doi = {},
journal = {Applied Spectroscopy},
issn = {0003-7028},
number = 2,
volume = 54,
place = {United States},
year = {1999},
month = {9}
}