Using HPSEC to identify NOM fraction removal and the correlation with disinfection by-product precursors

2015 ◽  
Vol 16 (2) ◽  
pp. 305-313 ◽  
Author(s):  
Euis Nurul Hidayah ◽  
Yung-Chen Chou ◽  
Hsuan-Hsien Yeh
Keyword(s):  
Humic Substances ◽  
Natural Organic Matter ◽  
High Performance ◽  
Haloacetic Acids ◽  
Size Exclusion ◽  
Formation Potential ◽  
Trihalomethane Formation Potential ◽  
Exclusion Chromatography ◽  
Alum Coagulation ◽  
Aliphatic Biopolymer

In this study high performance size exclusion chromatography (HPSEC) was used to compare an ultrafiltration (UF) membrane and alum coagulation for their capacity to remove different fractions of natural organic matter (NOM) from water. At the same time, the removal of disinfection by-product (DBP) precursors, as measured by trihalomethane formation potential (THMFP) and haloacetic acid formation potential (HAAFP), was also detected. The results show that the UF membrane mainly removed the aliphatic biopolymer fraction, while alum coagulation mainly removed the humic substances fraction. The results of DBP precursor analysis show that more THMFP was removed by the UF membrane than HAAFP, while the reverse was true for alum coagulation. It is conjectured that the aliphatic biopolymer fraction is the major precursor for trihalomethanes (THMs), while the humic substances fraction is the major precursor for haloacetic acids (HAAs).

Practical application of a combined treatment process for removal of recalcitrant NOM - alum and PAC

2004 ◽  
Vol 4 (4) ◽  
pp. 89-94 ◽  
Author(s):  
R. Fabris ◽  
C.W.K. Chow ◽  
M. Drikas
Keyword(s):  
High Performance ◽  
Treatment Process ◽  
Activated Carbons ◽  
Combined Treatment ◽  
Size Exclusion ◽  
Practical Application ◽  
Aluminium Sulphate ◽  
Treated Water ◽  
Trihalomethane Formation Potential ◽  
Exclusion Chromatography

Three different powdered activated carbons were applied in combination with aluminium sulphate to treat a high dissolved organic carbon (DOC) source water with a focus on improving natural organic matter removal. Treated water quality was analysed using absorbance at 254 nm, DOC, trihalomethane formation potential (THM-FP), rapid fractionation, C13 NMR and molecular weight distribution by high performance size exclusion chromatography. Carbon C and B offered equivalent DOC removal but carbon C was considered superior as treated water THM-FP was reduced. It is postulated that an organic fraction around 1000 Daltons is responsible for differences in THM-FP shown in the treated waters.

Characterization of humic substances by means of high-performance size exclusion chromatography

1996 ◽  
Vol 22 (5) ◽  
pp. 489-494 ◽  
Author(s):  
Dag Hongve ◽  
Jøran Baann ◽  
Georg Becher ◽  
Synne Lømo
Keyword(s):  
Humic Substances ◽  
Size Exclusion Chromatography ◽  
High Performance ◽  
Size Exclusion ◽  
Exclusion Chromatography

Characterization of River Natural Organic Matter by High-Performance Size Exclusion Chromatography

2015 ◽  
Vol 48 (18) ◽  
pp. 2936-2946 ◽  
Author(s):  
Dong Jin Lee ◽  
Jun Gu Gang ◽  
Su Young Lee ◽  
Ik Won Choi ◽  
Kang Min Chun ◽  
...  
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Size Exclusion Chromatography ◽  
High Performance ◽  
Size Exclusion ◽  
Exclusion Chromatography

scholarly journals The roles of bromide and precursor structures on DBP formation and species distribution

2006 ◽  
Vol 6 (4) ◽  
pp. 27-33 ◽  
Author(s):  
G.S. Wang ◽  
P.L. Huang
Keyword(s):  
Organic Matter ◽  
Organic Acids ◽  
Natural Organic Matter ◽  
Species Distribution ◽  
Ph Effect ◽  
Free Chlorine ◽  
Haloacetic Acids ◽  
Formation Potential ◽  
Trihalomethane Formation Potential

This study investigates the role of bromide and the structure of precursors in DBPs formation. Resorcinol (1,3-dihydroxylbenzene) and 2,4-pentadiol were used to represent the aromatic and aliphatic precursors. Laboratory prepared hydrophilic organic acids was used to simulate the mixtures of the aqueous natural organic matter. The results showed that about 60% of the bromide was transformed into HOBr and OBr− by chlorine when the chlorine dosages was high (5–20 mg/L of free chlorine). However, only 20% of bromide was transformed into HOBr and OBr− at low chlorine dosage (1 mg/L). Trihalomethane formation potential (THMFP) measurements showed that higher THMs formation was obtained at higher pH for 2,4-pentadiol, mainly due to the presence of the bromo-THMs. For resorcinol, however, no bromo-THMs are formed at either pH 7 or 9. For THMFP from hydrophilic organic acids, no apparent pH effect was observed. It is concluded that the higher THM formation at higher pH was mainly due to the formation of bromo-THMs from the aliphatic precursors. Similar trends are obtained in THMFP measurements for haloacetic acids formation potential (HAAFP).

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