Ajou University repository

Formation characteristics of carbonaceous and nitrogenous disinfection by-products depending on residual organic compounds by CGS and DAF
  • Maeng, Minsoo ;
  • Shahi, Nirmal Kumar ;
  • Shin, Gwyam ;
  • Son, Heejong ;
  • Kwak, Dongheui ;
  • Dockko, Seok
Citations

SCOPUS

0

Citation Export

Publication Year
2019-11-01
Journal
Environmental Science and Pollution Research
Publisher
Springer
Citation
Environmental Science and Pollution Research, Vol.26 No.33, pp.34008-34017
Keyword
Allogenic organic matter (AOM)Carbonaceous and nitrogenous disinfection by-product (C-DBPs and N-DBPs)Extracellular organic matter (EOM)Intracellular organic matter (IOM)Liquid chromatography with organic carbon detection (LC-OCD)
Mesh Keyword
DisinfectantsDisinfectionHalogenationHumic SubstancesMicrocystisNitrogenOrganic ChemicalsTrihalomethanesWaterWater Pollutants, ChemicalWater Purification
All Science Classification Codes (ASJC)
Environmental ChemistryPollutionHealth, Toxicology and Mutagenesis
Abstract
Allogenic organic matter (AOM) composed of extracellular and intracellular organic matter (EOM and IOM) is a major precursor of halogenated carbonaceous and nitrogenous disinfection by-products (C-DBPs and N-DBPs) upon chlorination. The EOM and IOM extracted from Microcystis aeruginosa were analyzed based on bulk parameters and organic fractions with different molecular weight by liquid chromatography with organic carbon detection (LC-OCD). It investigated the efficiency of a conventional gravity system (CGS) and dissolved air flotation (DAF) in the removal of organic precursors, together with measurement of the formation of four major trihalomethanes (THMs) and haloacetonitriles (HANs) in treated water upon chlorination. The results showed that EOM accounted for 59% of building blocks and humic substances, whereas for IOM, 54% were low molecular weight (LMW) neutrals. Both CGS and DAF showed 57–59% removal of dissolved organic carbon (DOC) from EOM and IOM. Regarding DON removal, DAF was found to be more effective, i.e., 8% higher than CGS for EOM. Moreover, the removal of LMW acids and neutrals (not easy to remove and are major precursors of DBPs) from EOM and IOM by DAF was higher than from CGS. The amounts of DBPs measured in all the samples treated for interchlorination were much lower than in the samples for prechlorination. Although the precursors of EOM had a higher concentration than in IOM, THMs and HANs were detected for IOM at a higher concentration, which might be attributed to higher amounts of aromatic, aliphatic moisture and protein compounds in the IOM. Comparatively, DAF showed lower THM and HAN values than CGS water, particularly for IOM. Also, DAF showed a sharp decrease in THMs and an insignificant increase in HANs according to time.
ISSN
1614-7499
Language
eng
URI
https://aurora.ajou.ac.kr/handle/2018.oak/30371
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85053406124&origin=inward
DOI
https://doi.org/2-s2.0-85053406124
Journal URL
https://link.springer.com/journal/11356
Type
Article
Funding
This present research was conducted by the research fund of Dankook University in 2016.
Show full item record

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Shin, Gwy-Am Image
Shin, Gwy-Am신귀암
Department of Environmental and Safety Engineering
Read More

Total Views & Downloads

File Download

  • There are no files associated with this item.