Institute for Medical Research and Occupational Health
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.Ispitivani su regativni i pozitivni učinci kloriranja i aeracije vode u sumpornoj termalnoj vodi u bazenima za refiabilltaclju. Znatno poboljšanje mikrobiološke kvalitete vode zbog kloriranja vode dovelo je do negativnih fizikalno-kemijskih promjena vode. Zbog aeracije gubi se sumporovodik i izlučuje koloidni sumpor (mliječna mutnoća), a zbog kloriranja javlja se žuckasta, crvenkasta do smeđa obojenost ovisno o dozi klora, a također nestaju sulfidi. Kloriranje termalne sumporne vode ne bi trebalo provoditi jer se iz vode eliminiraju terapijski aktivni spojevi i dolazi do organoleptičkih promjena na koje se pacijenti žale
