Predictions of nitrate diffusion in sediment using horizontal attenuated total reflection (HATR) by Fourier transform infrared (FTIR) spectrometry.

Predictions of nitrate diffusion in sediment using horizontal attenuated total reflection (HATR) by Fourier transform infrared (FTIR) spectrometry. Research Abstract Details 

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Predictions of nitrate diffusion in sediment using horizontal attenuated total reflection (HATR) by Fourier transform infrared (FTIR) spectrometry. Abstract Text:

H H P Fang,M Zhang,T Zhang,J Chen,

Using a novel and simple method based on horizontal attenuated total reflection (HATR) by Fourier transform infrared (FTIR) spectrometry, the effective diffusion coefficient, D(e), of nitrate in a contaminated anthropogenic sediment was estimated as 7.34x10(-6)cm(2)s(-1). This method, which requires as little as 1mL of sediment sample, was able to measure the D(e) of a chemical species with a reproducibility of +/-3% in about 5h. Based on this D(e) and a pre-determined nitrate reduction rate, the profiles of nitrate concentration in two sediment columns were satisfactorily predicted from a mathematical model. Results showed that the profile in this aged sediment depended mainly on the diffusion of nitrate and, only to a much lesser degree, the rate of nitrate reduction. Measurements in 55 anthropogenic sediment samples collected from five locations and various depths of a contaminated site further showed that the D(e) of nitrate increased linearly with the water content of the sediment, but decreased with the sediment density. The technique demonstrated in this study shall be applicable for the risk assessment of toxic pollutants in contaminated sediments, and for planning the spatial and time intervals of nitrate injection strategy in bioremediation.

Predictions of nitrate diffusion in sediment using horizontal attenuated total reflection (HATR) by Fourier transform infrared (FTIR) spectrometry. Publishing Authors By Initials

HH Fang,M Zhang,T Zhang,J Chen,

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Predictions of nitrate diffusion in sediment using horizontal attenuated total reflection (HATR) by Fourier transform infrared (FTIR) spectrometry. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Water research

VOLUME: 42

Page Numbers: 903-8

Journal Abbreviation: Water Res.

ISSN: 0043-1354

DAY: 7

MONTH: 09

YEAR: 2007

Predictions of nitrate diffusion in sediment using horizontal attenuated total reflection (HATR) by Fourier transform infrared (FTIR) spectrometry. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Predictions of nitrate diffusion in sediment using horizontal attenuated total reflection (HATR) by Fourier transform infrared (FTIR) spectrometry.

AFFILIATION: Centre for Environmental Engineering Research, Department of Civil Engineering, The University of Hong Kong, Hong Kong SAR, China.

Country: England

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MEDLINETA: Water Res

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