Document Detail

Effects of medium-pressure UV lamps radiation on water quality in a chlorinated indoor swimming pool.
MedLine Citation:
PMID:  16081132     Owner:  NLM     Status:  MEDLINE    
The aim of our study was to determine the impact of medium-pressure UV lamps radiation on water quality in a chlorinated indoor swimming pool. An indoor swimming pool was equipped with two medium-pressure UV lamps. We collected eight samples of water daily over a four-weeks period and measured total and free chlorine, pH, water temperature, bacteriological parameters, total organic carbon and trihalomethanes. During the first week, which served as control, medium-pressure UV lamps were turned off. During the next three weeks, medium-pressure UV lamps were kept on 24 h per day. The third week, we reduced the level of the injected chlorine into water, and the last week we also reduced the water renewal volume by 27%. Our results showed that bacteriological parameters remained within allowable french limits. When medium-pressure UV lamps were kept on, total, free and active chlorine levels were significantly increased (P<0.001), whereas combined chlorine level were significantly decreased (P<0.001 and P<0.05, respectively). The levels of chloroform and bromodichloromethane were significantly increased when medium-pressure UV lamps were kept on (P<0.001), whereas chlorodibromomethane and bromoform levels significantly decreased (P<0.05 and P<0.001, respectively). The additional formation of chloroform and bromodichloromethane may be explained by the increase in active chlorine and by radicalizing mechanisms initiated by UV radiation.
Delphine Cassan; Béatrice Mercier; Françoise Castex; André Rambaud
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2005-08-03
Journal Detail:
Title:  Chemosphere     Volume:  62     ISSN:  0045-6535     ISO Abbreviation:  Chemosphere     Publication Date:  2006 Mar 
Date Detail:
Created Date:  2006-02-22     Completed Date:  2006-04-14     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0320657     Medline TA:  Chemosphere     Country:  England    
Other Details:
Languages:  eng     Pagination:  1507-13     Citation Subset:  IM    
UPRES 2991, Efficience et Déficience Motrices, Faculté des Sciences du Sport, Université Montpellier 1, 34090 Montpellier, France.
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MeSH Terms
Hydrocarbons, Chlorinated / analysis*,  radiation effects
Swimming Pools / standards*
Ultraviolet Rays*
Water / analysis,  standards*
Water Pollutants, Chemical / analysis*,  radiation effects
Water Purification / instrumentation,  standards*
Reg. No./Substance:
0/Hydrocarbons, Chlorinated; 0/Water Pollutants, Chemical; 7732-18-5/Water

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