Impacts of ferrate oxidation on natural organic matter and disinfection byproduct precursors

2016 ◽  
Vol 96 ◽  
pp. 114-125 ◽  
Author(s):  
Yanjun Jiang ◽  
Joseph E. Goodwill ◽  
John E. Tobiason ◽  
David A. Reckhow
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Disinfection Byproduct

scholarly journals Degradation and transformation of natural organic matter accountable for disinfection byproduct formations by UV photolysis and UV/chlor(am)ine

2018 ◽  
Vol 79 (5) ◽  
pp. 929-937 ◽  
Author(s):  
Chanathip Hirun-Utok ◽  
Songkeart Phattarapattamawong
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Low Pressure ◽  
Haloacetic Acid ◽  
Uv Photolysis ◽  
Disinfection Byproduct ◽  
Proportional Relationship ◽  
Vacuum Uv ◽  
Potential Use

Abstract This research aimed to investigate the degradation of natural organic matter responsible for the formation of trihalomethane (THM), haloacetic acid (HAA) and haloacetonitrile (HAN) during ultraviolet (UV) photolysis and a co-exposure of UV with chlorine (UV/chlorine) and chloramine (UV/chloramine). Low pressure UV (LPUV) and vacuum UV (VUV) lamps were used for photolysis. VUV and LPUV irradiation changed aromatic/unsaturated structures to aliphatic ones, resulting in decreased THM and HAN formation. Following irradiation for 60 min, LPUV decreased THM and HAN by 16% ± 2% and 20% ± 6%, respectively. VUV decreased THM and HAN formation by 23% ± 3% and 20% ± 8%, respectively. HAA formation increased following photolysis. UV/chlorine treatment decreased THM, HAA and HAN. Higher chlorine doses had an inversely proportional relationship with THM and HAN formation. A chlorine dose of 4 mg·L−1 led to the greatest reductions, corresponding to 42% ± 2%, 10% ± 10% and 18% ± 6% for THM, HAA and HAN, respectively. UV/chloramine decreased the formation of THM more than UV/chlorine. With a chloramine dose of 4 mg·L−1, THM, HAA and HAN formation decreased by 74% ± 10%, 10% ± 10% and 11% ± 10%, respectively. This study showed the potential use of UV/chlor(am)ine for controlling the formation of THM, HAA and HAN.

Comparison of disinfection byproduct (DBP) formation from different UV technologies at bench scale

2002 ◽  
Vol 2 (5-6) ◽  
pp. 515-521 ◽  
Author(s):  
W. Liu ◽  
S.A. Andrews ◽  
J.R. Bolton ◽  
K.G. Linden ◽  
C. Sharpless ◽  
...  
Keyword(s):  
Organic Matter ◽  
Carboxylic Acids ◽  
Natural Organic Matter ◽  
Uv Irradiation ◽  
Direct Action ◽  
Disinfection Byproduct ◽  
Pressure Medium ◽  
The Impact ◽  
As Effects

The impact of UV irradiation on disinfection byproduct (DBP) formation was investigated for low pressure, medium pressure and pulsed UV technologies using a broad range of UV doses. Four classes of DBPs (THMs, HAAs, aldehydes and carboxylic acids) were examined. This enabled the determination of effects resulting from the direct action of UV irradiation on natural organic matter (aldehydes, carboxylic acids) as well as effects on the ultimate formation of chlorinated DBPs (THMs and HAAs) from secondary chlorination. For doses of less than 1,000 mJ/cm2, UV irradiation did not affect THM and HAA formation in subsequent chlorination processes, however higher UV doses resulted in lower ultimate concentrations of THMs and HAAs. UV irradiation also resulted in the formation of aldehydes and carboxylic acids at UV doses above 500 mJ/cm2, compounds that are known to adversely effect drinking water biostability.

Impact of chlorine exposure time on disinfection byproduct formation in the presence of iopamidol and natural organic matter during chloramination

2019 ◽  
Vol 78 ◽  
pp. 204-214 ◽  
Author(s):  
Nana Osei B. Ackerson ◽  
Alexis H. Killinger ◽  
Hannah K. Liberatore ◽  
Thomas A. Ternes ◽  
Michael J. Plewa ◽  
...  
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Exposure Time ◽  
Disinfection Byproduct ◽  
Byproduct Formation

Disinfection Byproduct Formation and Fractionation Behavior of Natural Organic Matter Surrogates

2009 ◽  
Vol 43 (15) ◽  
pp. 5982-5989 ◽  
Author(s):  
T. Bond ◽  
O. Henriet ◽  
E. H. Goslan ◽  
S. A. Parsons ◽  
B. Jefferson
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Disinfection Byproduct ◽  
Byproduct Formation

Watershed sources of disinfection byproduct precursors

2004 ◽  
Vol 4 (4) ◽  
pp. 61-69 ◽  
Author(s):  
D.A. Reckhow ◽  
P.L.S. Rees ◽  
D. Bryan
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Storm Event ◽  
Disinfection Byproduct ◽  
Reactive Materials ◽  
Leaching Experiments ◽  
Laboratory Investigations ◽  
Reservoir Watershed

A series of field and laboratory investigations was conducted aimed at characterizing disinfection byproduct (DBP) precursor levels in the Wachusett Reservoir watershed. Samples were collected from spatial based and storm event sampling campaigns, as well as laboratory leaching experiments. These were analyzed for DOC, TOC and DBP precursors in an effort to characterize the changes in precursor levels and natural organic matter (NOM) character in this watershed. Based on these data, it was proposed that freshly leached NOM is relatively poor in DBP precursors due to the abundance of non-reactive carbohydrates. As these compounds undergo biodegradation within the watershed, the measured specific DBP precursor level rises, because the more reactive materials (e.g. lignins, phenolics) are also more persistent.

Disinfection byproduct formation in reverse-osmosis concentrated and lyophilized natural organic matter from a drinking water source

2012 ◽  
Vol 46 (16) ◽  
pp. 5343-5354 ◽  
Author(s):  
Jonathan G. Pressman ◽  
Daniel L. McCurry ◽  
Shahid Parvez ◽  
Glenn E. Rice ◽  
Linda K. Teuschler ◽  
...  
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Reverse Osmosis ◽  
Natural Organic Matter ◽  
Water Source ◽  
Drinking Water Source ◽  
Disinfection Byproduct ◽  
Byproduct Formation

Carbonaceous DBPs (THMs and HAAs) formation on Cl2 and ClO2 treatment of aqueous soluble fractions of soil-derived natural organic matter

2022 ◽  
Author(s):  
R. K. Padhi
Keyword(s):  
Organic Matter ◽  
Surface Water ◽  
Dissolved Organic Matter ◽  
Natural Organic Matter ◽  
Substantial Portion ◽  
Disinfection Byproduct ◽  
Terrestrial Origin ◽  
Soluble Fractions

surface water dissolved organic matter feature substantial portion of terrestrial origin and serve as important precursor for toxic disinfection byproduct formation.In the present study, organic matter extracted from the composite...

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