Identification and Behaviour of Iodinated Haloform Medicinal Odor

Bruchet, A.; N’Guyen, K.; Mallevialle, J.; Anselme, C.

doi:10.1007/978-94-011-3356-2_41

Cited by 19 publications

(12 citation statements)

References 3 publications

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“…These involved iodinated THMs, which have been detected in various parts of the world, including Australia (Hansson et al 1987), France (Bruchet et al 1989) and Spain (Cancho et al 2000), where they have been associated with medicinal odour problems. Some of the early research on …”

Section: The Formation and Occurrence Of Emerging Disinfection By-promentioning

confidence: 99%

“…Surveys in the USA and Canada in the 1990s and 2000s provided data for assessing the formation, occurrence and control of emerging DBPs that are not currently regulated in the USA. These involved iodinated THMs, which have been detected in various parts of the world, including Australia (Hansson et al 1987), France (Bruchet et al 1989) and Spain (Cancho et al 2000), where they have been associated with medicinal odour problems. Some of the early research on…”

Section: The Formation and Occurrence Of Emerging Disinfection By-productsmentioning

confidence: 99%

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The formation and control of emerging disinfection by-products of health concern

Krasner¹

2009

Phil. Trans. R. Soc. A.

248

132

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When drinking water treatment plants disinfect water, a wide range of disinfection by-products (DBPs) of health and regulatory concern are formed. Recent studies have identified emerging DBPs (e.g. iodinated trihalomethanes (THMs) and acids, haloacetonitriles, halonitromethanes (HNMs), haloacetaldehydes, nitrosamines) that may be more toxic than some of the regulated ones (e.g. chlorine- and bromine-containing THMs and haloacetic acids). Some of these emerging DBPs are associated with impaired drinking water supplies (e.g. impacted by treated wastewater, algae, iodide). In some cases, alternative primary or secondary disinfectants to chlorine (e.g. chloramines, chlorine dioxide, ozone, ultraviolet) that minimize the formation of some of the regulated DBPs may increase the formation of some of the emerging by-products. However, optimization of the various treatment processes and disinfection scenarios can allow plants to control to varying degrees the formation of regulated and emerging DBPs. For example, pre-disinfection with chlorine, chlorine dioxide or ozone can destroy precursors for N -nitrosodimethylamine, which is a chloramine by-product, whereas pre-oxidation with chlorine or ozone can oxidize iodide to iodate and minimize iodinated DBP formation during post-chloramination. Although pre-ozonation may increase the formation of trihaloacetaldehydes or selected HNMs during post-chlorination or chloramination, biofiltration may reduce the formation potential of these by-products.

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Section: The Formation and Occurrence Of Emerging Disinfection By-promentioning

confidence: 99%

Section: The Formation and Occurrence Of Emerging Disinfection By-productsmentioning

confidence: 99%

The formation and control of emerging disinfection by-products of health concern

Krasner¹

2009

Phil. Trans. R. Soc. A.

248

132

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“…Iodine is ubiquitous in natural waters in the form of iodide (I – ), iodate (IO 3 – ), and iodoorganic compounds. These iodine species can be transformed into each other, which is affected by the environmental conditions such as microbial activities , or chemical redox reactions. − It has been reported that oxidative treatment of iodide-containing waters can lead to the formation of iodinated disinfection byproducts (I-DBPs). − In the past decades, I-DBPs have drawn increasing concerns due to their much higher toxicity than their brominated and chlorinated analogues. − In addition, some I-DBPs such as iodoform (CHI 3 ) and dichloroiodomethane can also cause taste and odor problems in drinking waters. − …”

Section: Introductionmentioning

confidence: 99%

Transformation of Iodide by Carbon Nanotube Activated Peroxydisulfate and Formation of Iodoorganic Compounds in the Presence of Natural Organic Matter

Guan

Jiang

Luo

et al. 2016

Environ. Sci. Technol.

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In this study, we interestingly found that peroxydisulfate (PDS) could be activated by a commercial multiwalled carbon nanotube (CNT) material via a nonradical pathway. Iodide (I) was quickly and almost completely oxidized to hypoiodous acid (HOI) in the PDS/CNT system over the pH range of 5-9, but the further transformation to iodate (IO) was negligible. A kinetic model was proposed, which involved the formation of reactive PDS-CNT complexes, and then their decomposition into sulfate anion (SO) via inner electron transfer within the complexes or by competitively reacting with I. Several influencing factors (e.g., PDS and CNT dosages, and solution pH) on I oxidation kinetics by this system were evaluated. Humic acid (HA) decreased the oxidation kinetics of I, probably resulting from its inhibitory effect on the interaction between PDS and CNT to form the reactive complexes. Moreover, adsordable organic iodine compounds (AOI) as well as specific iodoform and iodoacetic acid were appreciably produced in the PDS/CNT/I system with HA. These results demonstrate the potential risk of producing toxic iodinated organic compounds in the novel PDS/CNT oxidation process developed very recently, which should be taken into consideration before its practical application in water treatment.

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“…The characteristic medicinal odors which appear quite frequently in chlorinated finished drinking waters have been shown to be associated with the formation of iodinated trihalomethanes (THMs) ( , ). Hansson et al () mentioned that an iodoform concentration of 5 μg/L is sufficient to yield a medicinal taste.…”

Section: A Introductionmentioning

confidence: 99%

Chlorination and Formation of Organoiodinated Compounds: The Important Role of Ammonia

Leitner

Vessella

Doré

et al. 1998

Environ. Sci. Technol.

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This study has been undertaken to determine the conditions of formation of organoiodinated compounds responsible for medicinal tastes and odors frequently observed after chlorination of waters containing iodides. It has been shown that iodoform was formed in the presence of chloramines, in a region where the formation of the most classical chlorinated and brominated THMs is usually unfavored. Reactions would take place between monochloramine, organic matter, and iodides to yield iodoform. These interactions are favored when iodide ions are replaced by iodine. Oxidation by iodine alone in the presence of ammonia and without monochloramine does not explain the yield of the iodinated THMs observed. However, nitrogenated molecules such as amines and amino acids would take part during chlorination in the production of organoiodinated compounds to a small extent.

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Identification and Behaviour of Iodinated Haloform Medicinal Odor

Cited by 19 publications

References 3 publications

The formation and control of emerging disinfection by-products of health concern

The formation and control of emerging disinfection by-products of health concern

Transformation of Iodide by Carbon Nanotube Activated Peroxydisulfate and Formation of Iodoorganic Compounds in the Presence of Natural Organic Matter

Chlorination and Formation of Organoiodinated Compounds: The Important Role of Ammonia

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