Why COD_Mn is not suitable for assessing NOM concentration in source waters
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985874%3A_____%2F25%3A00637486" target="_blank" >RIV/67985874:_____/25:00637486 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11310/25:10500201
Result on the web
<a href="https://awwa.onlinelibrary.wiley.com/doi/10.1002/aws2.70026" target="_blank" >https://awwa.onlinelibrary.wiley.com/doi/10.1002/aws2.70026</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/aws2.70026" target="_blank" >10.1002/aws2.70026</a>
Alternative languages
Result language
angličtina
Original language name
Why COD_Mn is not suitable for assessing NOM concentration in source waters
Original language description
Total organic carbon (TOC) and permanganate chemical oxygen demand (COD_Mn) are the most commonly employed methods to determine the amount of natural organic matter (NOM) in raw and drinking water. However, the usage of COD_Mn is questionable due to its variable degrees of oxidation for different types of organics. Our study investigates the ratio of COD_Mn to TOC in source waters with diverse NOM compositions characterized by specific UV absorbance (SUVA) and total organic nitrogen (TON). Herein, mountainous water sources with high amounts of humic substances (high SUVA, low TON) exhibit approximately 1.8–2.5 times higher COD_Mn values than lowland algae-laden sources (low SUVA, high TON) despite having the same TOC values. The determination of COD_Mn, therefore, can give misleading information about the amount of organics in waters with different NOM character and underestimate the NOM concentration in lowland algae-laden water sources, which could have implications for drinking water quality.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10511 - Environmental sciences (social aspects to be 5.7)
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
AWWA Water Science
ISSN
2577-8161
e-ISSN
2577-8161
Volume of the periodical
7
Issue of the periodical within the volume
4
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
e70026
UT code for WoS article
001531351700001
EID of the result in the Scopus database
2-s2.0-105011255296