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Comprehensive isolation of natural organic matter from water for spectral characterizations and reactivity testing

By: , , , , , , and 
https://doi.org/10.1021/bk-2000-0761.ch005

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Abstract

A variety of approaches were tested to comprehensively isolate natural organic matter (NOM) from water. For waters with high NOM concentrations such as the Suwannee River, Georgia, approaches that used combinations of membrane concentrations, evaporative concentrations, and adsorption on nonionic XAD resins, ion exchange resins and iron oxide coated sand isolated over 90% of the NOM. However, for waters with low NOM concentrations, losses of half of the NOM were common and desalting of NOM isolates was a problem. A new comprehensive approach was devised and tested on the Seine River, France in which 100 L of filtered water was sodium softened by ion exchange and vacuum evaporated to 100 mL. Colloids (32% of the NOM) were isolated using a 3,500 Dalton membrane by dialysis against 0.1 M HCl and 0.2 M HF to remove salts and silica. On the membrane permeate, hydrophobic NOM (42%) was isolated using XAD-8 resin and hydrophilic NOM (26%) was isolated using a variety of selective desalting precipitations. The colloid fraction was characterized by IR and NMR spectroscopy as N-acetylamino sugars.

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Publication type Conference Paper
Publication Subtype Conference Paper
Title Comprehensive isolation of natural organic matter from water for spectral characterizations and reactivity testing
DOI 10.1021/bk-2000-0761.ch005
Volume 761
Year Published 2000
Language English
Publisher American Chemical Society
Description 16 p.
Larger Work Type Book
Larger Work Subtype Conference publication
Larger Work Title Natural organic matter and disinfection by-products
First page 68
Last page 83
Country France, United States
State Georgia
Other Geospatial Seine River, Suwannee River
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