Identification of humic acid-like and fulvic acid-like natural organic matter in river water using fluorescence spectroscopy.
Water Sci Technol
; 63(10): 2427-33, 2011.
Article
in En
| MEDLINE
| ID: mdl-21977670
ABSTRACT
Identifying the extent of humic acid (HA)-like and fulvic acid (FA)-like natural organic matter (NOM) present in natural water is important to assess disinfection by-product formation and fouling potential during drinking water treatment applications. However, the unique fluorescence properties related to HA-like NOM is masked by the fluorescence signals of the more abundant FA-like NOM. For this reason, it is not possible to accurately characterize HA-like and FA-like NOM components in a single water sample using direct fluorescence EEM analysis. A relatively simple approach is described here that demonstrates the feasibility of using a fluorescence excitation-emission matrix (EEM) approach for identifying HA-like and FA-like NOM fractions in water when used in combination with a series of pH adjustments and filtration steps. It is demonstrated that the fluorescence EEMS of HA-like and FA-like NOM fractions from the river water sample possessed different spectral properties. Fractionation of HA-like and FA-like NOM prior to fluorescence analysis is therefore proposed as a more reasonable approach.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Benzopyrans
/
Rivers
/
Humic Substances
Type of study:
Diagnostic_studies
Country/Region as subject:
America do norte
Language:
En
Journal:
Water Sci Technol
Journal subject:
SAUDE AMBIENTAL
/
TOXICOLOGIA
Year:
2011
Document type:
Article
Affiliation country:
Canada