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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 1, Iss. 4 — Apr. 12, 2006

Effect of particles on ultraviolet light penetration in natural and engineered systems

Hadas Mamane, Joel J. Ducoste, and Karl G. Linden  »View Author Affiliations


Applied Optics, Vol. 45, Issue 8, pp. 1844-1856 (2006)
http://dx.doi.org/10.1364/AO.45.001844


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Abstract

The effect of light scattering on measurement of UV absorbance and penetration of germicidal UVC irradiance in a UV reactor were studied. Using a standard spectrophotometer, absorbance measurements exhibited significant error when particles that scatter light were present but could be corrected by integrating sphere spectroscopy. Particles from water treatment plants and wastewater effluents exhibited less scattering ( 20 % 30 % ) compared with particles such as clay ( 50 % ) and alumina ( 95 % 100 % ) . The distribution of light intensity in a UV reactor for a scattering suspension was determined using a spherical chemical actinometry method. Highly scattering alumina particles increased the fluence rate in the reactor near the UV lamp, whereas clay particles and absorbing organic matter reduced the fluence rate. A radiative transfer fluence rate model reasonably predicted the fluence rate of absorbing media and highly scattering suspensions in the UV reactor.

© 2006 Optical Society of America

OCIS Codes
(290.5820) Scattering : Scattering measurements
(300.1030) Spectroscopy : Absorption

ToC Category:
Scattering

History
Original Manuscript: July 19, 2005
Revised Manuscript: October 12, 2005
Manuscript Accepted: October 12, 2005

Virtual Issues
Vol. 1, Iss. 4 Virtual Journal for Biomedical Optics

Citation
Hadas Mamane, Joel J. Ducoste, and Karl G. Linden, "Effect of particles on ultraviolet light penetration in natural and engineered systems," Appl. Opt. 45, 1844-1856 (2006)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ao-45-8-1844


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