Complex mechanism of sulphane odour production in water heating and suitable remedial measures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F75010330%3A_____%2F22%3A00013795" target="_blank" >RIV/75010330:_____/22:00013795 - isvavai.cz</a>

Výsledek na webu

<a href="https://iwaponline.com/ws/article/22/2/2082/83840/Complex-mechanism-of-sulphane-odour-production-in" target="_blank" >https://iwaponline.com/ws/article/22/2/2082/83840/Complex-mechanism-of-sulphane-odour-production-in</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2166/ws.2021.292" target="_blank" >10.2166/ws.2021.292</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Complex mechanism of sulphane odour production in water heating and suitable remedial measures

Popis výsledku v původním jazyce

Drinking or heated water can have a wide range of disturbing odours which have many various causes. A well known example is sulphane (hydrogen sulfide) odour, reminiscent of rotten eggs, which naturally occurs in some underground waters. Less known and hitherto unexplained is this odour arising from hot water in water heaters. As a response to complaints by consumers we investigated 14 sites and thanks to experimental work in one of these recognised a complex mechanism at work. For production of sulphane to occur in a water heater the following conditions must be met: presence of sulphate-reducing bacteria, presence of sulphates, reduction properties of water indicated by a very low nitrate content (highest value was 10 mg/L, mostly <2 mg/L), and presence of sacrificial magnesium anode. We identified four possible remedial measures, some of which are less effective or only short-term, or have an undesirable side-effect (corrosion). The most effective measure was replacement of the magnesium anode for an aluminium or zinc anode, which retains the anticorrosion protection of the heater.

Název v anglickém jazyce

Complex mechanism of sulphane odour production in water heating and suitable remedial measures

Popis výsledku anglicky

Drinking or heated water can have a wide range of disturbing odours which have many various causes. A well known example is sulphane (hydrogen sulfide) odour, reminiscent of rotten eggs, which naturally occurs in some underground waters. Less known and hitherto unexplained is this odour arising from hot water in water heaters. As a response to complaints by consumers we investigated 14 sites and thanks to experimental work in one of these recognised a complex mechanism at work. For production of sulphane to occur in a water heater the following conditions must be met: presence of sulphate-reducing bacteria, presence of sulphates, reduction properties of water indicated by a very low nitrate content (highest value was 10 mg/L, mostly <2 mg/L), and presence of sacrificial magnesium anode. We identified four possible remedial measures, some of which are less effective or only short-term, or have an undesirable side-effect (corrosion). The most effective measure was replacement of the magnesium anode for an aluminium or zinc anode, which retains the anticorrosion protection of the heater.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

30304 - Public and environmental health

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Water Supply

ISSN

1606-9749

e-ISSN

1607-0798

Svazek periodika

22

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

2082-2092

Kód UT WoS článku

000692742600001

EID výsledku v databázi Scopus

2-s2.0-85125571164