Alternatives to Chlorine in Swimming Pools

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Despite the significant benefits of pool chlorines in their capacity to kill hazardous bacteria, it is evident that some of the side effects can be disadvantageous. The general smell of chlorine can be overwhelmingly unpleasant, and the agent can irritate the skin and eyes. It is also has the capability to bleach some fabrics, potentially damaging clothing. Most significantly, excessive air pockets of chlorine gas that surround pools can be hazardous for peoples’ health and possibly even be carcinogenic. For these reasons, some industries have started to investigate new alternative methods to chlorine for sterilising pools. According to Smith and Monteath et al. (2006, pp. 1 - 37), ‘some of these are good alternatives, but they do not achieve the cleanliness, oxidation levels or low price that chlorine provides’.
One of the primary alternatives to chlorine in swimming pools is Bromine. Bromine is an extremely effective pool sanitiser, successfully killing harmful bacteria found in pools. The compound can only be added in one of two very specific methods – making it very expensive. As Missouri Department Of Health And Senior Services Section For Environmental Public Health, 2014 (p. 14, 15) describes; ‘For pool sanitation, bromine compounds are sold in two solid forms - a two-part system that uses a bromide salt dissolved in water and activated by addition of a separate oxidizer; and a one-part stick or tablet that contains both bromine and an oxidizer and is dispensed by an erosion-type feeder.’ Once the Bromine is in the pool, it reacts with the water to form hypobromous acid which further dissociates into hypobromite ions through the following equation;

HOBr(aq) + H2O(l) ↔ H3O+(aq) + OBr-(aq)

Figure 10: Dissociation of Hypobr...

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... to how they best maintain their pool and their requirements in terms of finance and effort.

Works Cited

Chemistry at Work. 2014. pp. 4 - 5.
Missouri Department Of Health And Senior Services Section For Environmental Public Health. 2014. Swimming Pool and Spa Water Chemistry. [e-book] Missouri: nitt.edu. p. 14, 15. Available through: nitt.edu http://www.nitt.edu/home/students/facilitiesnservices/sportscenter/swimmingpool/Swim-pool-chemistry.pdf [Accessed: 30 Mar 2014].
Poolnerd.com. 2014. poolnerd » Blog Archive » Ozone: Should You Use It In Your Pool?. [online] Available at: http://poolnerd.com/2007/02/17/ozone-should-you-use-it-in-your-pool/ [Accessed: 30 Mar 2014].
Sturgeon, J. 2014. Swimming Pools: Alternatives to Chlorine. [online] Available at: http://www.houselogic.com/home-advice/pools-spas/swimming-pools-alternatives-chlorine/#. [Accessed: 30 Mar 2014].

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