Hrvatske vode, Vol. 31 No. 124, 2023.
Professional paper
Trihalomethanes in pool water during implementation of the combined disinfection method (UV irradiation and chlorinatione)
Melani Sigler Zekanović
; Sveučilište u Rijeci Medicinski fakultet Braće Branchetta 20, Rijeka, Hrvatska
*
Ivana Gobin
; Sveučilište u Rijeci Medicinski fakultet Braće Branchetta 20, Rijeka, Hrvatska
Dijana Tomić Linšak
; Sveučilište u Rijeci Medicinski fakultet Braće Branchetta 20, Rijeka, Hrvatska
* Corresponding author.
Abstract
Pool water must meet certain physical, chemical and microbiological condition in order to achieve health safety. Disinfection plays an important role in order to maintain the quality of pool water, and is the main method for removal and correction of microbiological and chemical dangers. The most frequent method during pool water conditioning is a disinfection with chlorine products, whereby one must be mindful of harmful by-products concentrations. Therefore, the approach combining the chlorination method with the use of ultraviolet lamps is often applied. During a one-year research was conducted into the double disinfection technology (UV irradiation/chlorination) for pool water. The concentrations of selected chemical parameters (free chlorine, trihalomethanes, etc.) in fresh water indoor pool were monitored. In addition to a chemical parameters analysis, the monitoring of the average number of bathers and the dynamics and quantity of exchanged water were monitored as well. In the observation period, a total of 12 water samples were analysed. Increased concentrations of trihalomethane (THM) and free chlorine were measured in the period of single disinfection method, although their values did not exceed Maximum Permissible Limit values. The analysis results indicate that changes in THM concentrations depend on the method of implemented disinfection and the number of bathers, but show no dependence on the quantity of exchanged water. The results show that it is necessary to establish a continuous control of harmful by-products of disinfection and an adequate implementation of corrective measures for health protection of pool users.
Keywords
pool water, corrective measures, disinfection by-products, trihalomethanes
Hrčak ID:
315627
URI
Publication date:
29.6.2023.
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