Rapid fractionation of natural organic matter in water using a novel solid-phase extraction technique.
This paper introduces a novel natural organic matter (NOM) fractionation technique using solid-phase extraction cartridges. The new technique requires only 6 hours of fractionation time, which is much faster than traditional fractionation techniques (24 hours). It uses three Bond Elute ENV cartridges (Varian, Inc., Lake Forest, California), one Strata X-C cartridge (Phenomenex, Torrance, California), and one Strata X-AW cartridge (Phenomenex) in series and was tested by using to fractionate NOM from Suwannee River, Georgia (SRNOM) and Red River, Minnesota (RRNOM). Hydrophobic acid was a major fraction and accounted for 66 to 70% and 36% of SRNOM and RRNOM, respectively. The NOM fractions obtained from the developed method were characterized using Fourier transformed infrared spectroscopy and 13C nuclear magnetic resonance. The acid fractions of SRNOM mainly consisted of carboxylic acids. An application of this new technique was demonstrated by using it to investigate the effectiveness of water treatment processes in removing different NOM fractions.
Ratpukdi
Thunyalux
T
Department of Civil Engineering, North Dakota State University, Fargo, North Dakota, USA.
Rice
James A
JA
Chilom
Gabriela
G
Bezbaruah
Achintya
A
Khan
Eakalak
E
D002247:Carbon Isotopes; D005618:Fresh Water / Q000737:chemistry*; D006812:Humic Substances / Q000032:analysis*; D009682:Magnetic Resonance Spectroscopy; D009930:Organic Chemicals / Q000737:chemistry*; D052617:Solid Phase Microextraction; D017550:Spectroscopy, Fourier Transform Infrared; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
D002247:Carbon Isotopes; D006812:Humic Substances; D009930:Organic Chemicals; D014874:Water Pollutants, Chemical