Number-Average Molecular Weights of Natural Organic Matter, Hydrophobic Acids, and Transphilic Acids from the Suwannee River, Georgia, as Determined Using Vapor Pressure Osmometry

2015 ◽  
Vol 32 (1) ◽  
pp. 23-30 ◽  
Author(s):  
Jeffrey W. Pavlik ◽  
E. Michael Perdue
Keyword(s):  
Organic Matter ◽  
Vapor Pressure ◽  
Natural Organic Matter ◽  
Vapor Pressure Osmometry ◽  
Molecular Weights ◽  
Suwannee River ◽  
Hydrophobic Acids

Application of a fractionation technique for better understanding of the removal of natural organic matter by alum coagulation

2002 ◽  
Vol 2 (5-6) ◽  
pp. 427-433 ◽  
Author(s):  
J. van Leeuwen ◽  
C. Chow ◽  
R. Fabris ◽  
N. Withers ◽  
D. Page ◽  
...  
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
High Performance ◽  
Relative Proportion ◽  
Water Source ◽  
Size Exclusion ◽  
Gas Chromatography Mass Spectrometry ◽  
Pyrolysis Gas ◽  
Alum Treatment ◽  
Hydrophobic Acids

To gain an improved understanding of the types of organic compounds that are recalcitrant to water treatment, natural organic matter (NOM) isolates from two drinking water sources (Mt. Zero and Moorabool reservoirs, Victoria, Australia) were separated into fractions of distinct chemical behaviour using resins. Four fractions were obtained from each water source and were organics absorbed to: (1) XAD-8 (very hydrophobic acids, VHA); (2) DAX-4 (slightly hydrophobic acids, SHA); (3) bound to an anion exchange resin (charged organics, CHAR); and (4) not absorbed or bound to resins (neutrals, NEUT). These fractions were then tested to determine the capacity of alum to remove them from water and to correlate this with the character of each isolate. The fractions were characterised by the application of high performance size exclusion chromatography (HPSEC), bacterial regrowth potential (BRP), trihalomethane formation potential (THMFP), pyrolysis gas-chromatography mass spectrometry (Py-GC-MS) and thermochemolysis. The highest removals of dissolved organic carbon (DOC) by alum treatment were in waters spiked with the CHAR fractions while the NEUT fractions were the most recalcitrant. The number average molecular weights (Mn) of DOC of the CHAR fractions before treatment were the highest, whilst those of the NEUT fractions were the lowest. After alum treatment, the Mn of the NEUT fractions were only slightly reduced. Results from Py-GC-MS and thermochemolysis indicate that the NEUT fractions had the highest relative proportion of saccharide derived organic material. Nonetheless, the BRP of waters spiked with the NEUT fractions differed markedly, indicating that organics recalcitrant to alum treatment can vary substantially in their chemical composition and capacity to support microbial growth.

scholarly journals Effect of UVC pre-irradiation on the Suwannee river Natural Organic Matter (SRNOM) photoxidant properties

2021 ◽  
pp. 117395
Author(s):  
Davide Palma ◽  
Amina Khaled ◽  
Mohamad Sleiman ◽  
Guillaume Voyard ◽  
Claire Richard
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Suwannee River

Photodecomposition of Carbaryl in the Presence of Silver-Doped Zeolite Y and Suwannee River Natural Organic Matter

2003 ◽  
Vol 37 (10) ◽  
pp. 2280-2285 ◽  
Author(s):  
Marsha C. Kanan ◽  
Sofian M. Kanan ◽  
Rachel N. Austin ◽  
Howard H. Patterson
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Zeolite Y ◽  
Suwannee River

Suwannee River Natural Organic Matter: Isolation of the 2R101N Reference Sample by Reverse Osmosis

2015 ◽  
Vol 32 (1) ◽  
pp. 38-44 ◽  
Author(s):  
Nelson W. Green ◽  
Daniel McInnis ◽  
Norbert Hertkorn ◽  
Patricia A. Maurice ◽  
E. Michael Perdue
Keyword(s):  
Organic Matter ◽  
Reverse Osmosis ◽  
Natural Organic Matter ◽  
Reference Sample ◽  
Suwannee River
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