The natural chlorine cycle - Formation of the carcinogenic and greenhouse gas compound chloroform in drinking water reservoirs

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389030%3A_____%2F16%3A00461919" target="_blank" >RIV/61389030:_____/16:00461919 - isvavai.cz</a>

Alternative codes found

RIV/00216275:25310/16:39914196

Result on the web

<a href="http://dx.doi.org/10.1016/j.chemosphere.2016.05.017" target="_blank" >http://dx.doi.org/10.1016/j.chemosphere.2016.05.017</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.chemosphere.2016.05.017" target="_blank" >10.1016/j.chemosphere.2016.05.017</a>

Result language

angličtina

Original language name

The natural chlorine cycle - Formation of the carcinogenic and greenhouse gas compound chloroform in drinking water reservoirs

Original language description

Chlorine cycle in natural ecosystems involves formation of low and high molecular weight organic compounds of living organisms, soil organic matter and atmospherically deposited chloride. Chloroform (CHCl3) and adsorbable organohalogens (AOX) are part of the chlorine cycle. We attempted to characterize the dynamical changes in the levels of total organic carbon (TOC), AOX, chlorine and CHCl3 in a drinking water reservoir and in its tributaries, mainly at its spring, and attempt to relate the presence of AOX and CHCl3 with meteorological, chemical or biological factors. nnWater temperature and pH influence the formation and accumulation of CHCl3 and affect the conditions for biological processes, which are demonstrated by the correlation between CHCl3 and Sigma AOX/Cl- ratio, and also by CHCl3/Sigma AOX, CHCl3/AOX(LMW), CHCl3/Sigma TOC, CHCl3/TOCLMW and CHCl3/Cl- ratios in different microecosystems (e.g. old spruce forest, stagnant acidic water, humid and warm conditions with high biological activity). These processes start with the biotransformation of AOX from TOC, continue via degradation of AOX to smaller molecules and further chlorination, and finish with the formation of small chlorinated molecules, and their subsequent volatilization and mineralization. The determined concentrations of chloroform result from a dynamic equilibrium between its formation and degradation in the water; in the Hamry water reservoir, this results in a total amount of 0.1-0.7 kg chloroform and 5.2-15.4 t chloride. The formation of chloroform is affected by Cl- concentration, by concentrations and ratios of biogenic substrates (TOC and AOX), and by the ratios of the substrates and the product (feedback control by chloroform itself).

Czech name

—

Czech description

—

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

EF - Botany

OECD FORD branch

—

Project

<a href="/en/project/GA13-11101S" target="_blank" >GA13-11101S: Following elusive low molecular weight organochlorine compounds of natural and anthropogenically affected ecosystems</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Chemosphere

ISSN

0045-6535

e-ISSN

—

Volume of the periodical

157

Issue of the periodical within the volume

AUG

Country of publishing house

GB - UNITED KINGDOM

Number of pages

10

Pages from-to

190-199

UT code for WoS article

000378452400024

EID of the result in the Scopus database

—