To add or not to add: The use of quenching agents for the analysis of disinfection by-products in water samples

Kristiana, Ina; Lethorn, Arron; Joll, Cynthia; Heitz, Anna

doi:10.1016/j.watres.2014.04.006

Cited by 133 publications

(75 citation statements)

References 14 publications

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“…2f and 3f). Other studies reporting instability of haloacetonitriles in chlorinated water can be found in the literature (Hansen et al, 2013a;Kristiana et al, 2014). In the present study it was found that dichloroacetonitrile was formed directly by UV (UV 1d / Cl 2 vs.…”

Section: Effect Of Uv On Miscellaneous Dbpssupporting

confidence: 66%

Secondary formation of disinfection by-products by UV treatment of swimming pool water

Spiliotopoulou

Hansen

Andersen

2015

Science of The Total Environment

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Section: Effect Of Uv On Miscellaneous Dbpssupporting

confidence: 66%

Secondary formation of disinfection by-products by UV treatment of swimming pool water

Spiliotopoulou

Hansen

Andersen

2015

Science of The Total Environment

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“…The chlorination was performed in quintuplicates with three samples used for DBP analysis and two for the determination of residual chlorine. Samples for DBP analyses were also dosed with ammonium chloride solution (50 mg/L) to quench free chlorine which does neither affect the already formed DBP [24] nor increase the N-DBP formation [25]. The samples were analyzed the same day.…”

Section: Chlorinationmentioning

confidence: 99%

Effect of ozonation of swimming pool water on formation of volatile disinfection by-products – A laboratory study

Hansen

Spiliotopoulou²,

Cheema

et al. 2016

Chemical Engineering Journal

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Ozonation experiments were performed using unchlorinated tap water used for filling municipal swimming pools, actual pool water and pool water polluted by addition of fresh tap water and artificial body fluid to evaluate ozone kinetics and water quality effects on formation of volatile disinfection byproducts during subsequent chlorination. The ozone reaction was observed to behave according to first order kinetics. For tap water half-life was 4 min whilst polluted and unpolluted pool water exhibited half-life of 8 and 11 min, respectively. When ozonation dosage was repeated half-life of ozone was approximated 17-19 min in all samples. Subsequent chlorination revealed ozone removed reactivity of dissolved organic carbon toward chlorine for tap and polluted pool water, decreasing formation rate of trihalomethanes (TTHM). In pool water higher rates of TTHM formation was observed after the initial ozone dosage, however this decreased with subsequent treatments. For tap and polluted pool water, ozone reacted directly with the pollutants resulting in a short ozone half-life, removing reactivity towards chlorine oxidation and preventing TTHM production. Conversely for pool water samples, due to the long half-life of ozone, the molecule decomposed to hydroxyl radicals. These in turn reacted with aqueous organic matter increasing chlorine reactivity and rates of TTHM formation. Formation of other non-regulated volatile byproducts (e.g. dichloracetonitrile, trichlorpropanone and trichloronitromethane) was observed to increase in pool water with ozone treatment. Thus, ozonation dosage regimes should be designed such that ozone mostly oxidizes fresh pollutants before chlorine is able to react with it.

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“…Chlorination was performed in quadruplicate, with three samples used for DBP analysis and one for the determination of residual chlorine. Samples for DBP analysis were dosed with an ammonium chloride solution (50 mg/L), to quench free chlorine, which neither affects the already formed DBP (Kristiana et al, 2014) nor increases N-DBP formation (Hua et al, 2014). The samples were extracted and analysed for DBPs the same day.…”

Section: Chlorinationmentioning

confidence: 99%

Effect of medium-pressure UV-lamp treatment on disinfection by-products in chlorinated seawater swimming pool waters

Cheema

Manasfi

Kaarsholm

et al. 2017

Science of The Total Environment

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To add or not to add: The use of quenching agents for the analysis of disinfection by-products in water samples

Cited by 133 publications

References 14 publications

Secondary formation of disinfection by-products by UV treatment of swimming pool water

Secondary formation of disinfection by-products by UV treatment of swimming pool water

Effect of ozonation of swimming pool water on formation of volatile disinfection by-products – A laboratory study

Effect of medium-pressure UV-lamp treatment on disinfection by-products in chlorinated seawater swimming pool waters

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