Original scientific paper

Changes of some sulphuric thermal water characteristics due to chlorination

Ankica Senta ; "Andrija Štampar" School of Public Health, Medical Faculty University of Zagreb, Zagreb, Croatia
Mirna Zebec ; "Andrija Štampar" School of Public Health, Medical Faculty University of Zagreb, Zagreb, Croatia
Tomislav Jakovčić ; "Andrija Štampar" School of Public Health, Medical Faculty University of Zagreb, Zagreb, Croatia

Abstract

Positive and negative effects of water chlorination and aeration were examined in samples of sulphuric thermal water from rehabilitation pools. Although chlorination considerably improved the microbiological quality of the water, it caused various negative physical and chemical changes. Aeration caused loss ot hydrogen sulphide and production of colloidal sulphur (milky turbidity), whereas chlorination developed a yellowish-reddish-brown colouring depending on chlorine dosage, and also provoked the disappearance of sulphides. It is concluded that sulphuric thermal water should not be chlorinated because of elimination, through chlorination, of therapeutically active compounds causing organoleptic changes that are subject to complaints from patients.

Keywords

change of colour; chlorine dosage; free available chlorine; pool water; rehabilitation; sulphuric compounds; turbidity; water aeration

Hrčak ID:

144666

URI

https://hrcak.srce.hr/144666

Publication date:

2.4.1997.

Article data in other languages: croatian

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