Comparison of iodinated trihalomethanes formation during aqueous chlor(am)ination of different iodinated X-ray contrast media compounds in the presence of natural organic matter

Ye, Tao; Xu, Bin; Wang, Zhen; Zhang, Tianyang; Hu, Chen-Yan; Lin, Lin; Xia, Shengji; Gao, Naiyun

doi:10.1016/j.watres.2014.08.044

Cited by 53 publications

(23 citation statements)

References 28 publications

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“…ICMs are widely encountered in hospital wastewaters, municipal wastewater and drinking water at concentrations up to 100 μg/L [12][13][14][15][16][37][38][39]. (Chemical structures of those ICMs that have been used in prior studies of EC treatment are shown in Fig.…”

Section: Contrast Mediamentioning

confidence: 99%

“…Conventional processes have little success in removing ICMs due to their high hydrophilicity and resistance to biological degradation. AOPs such as UV photolysis, sonolysis, Fenton, photo-Fenton, H 2 O 2 /UV-C, TiO 2 /UV-A and O 3 /H 2 O 2 remove ICMs but these processes generate toxic iodinated by-products [14][15][16][37][38][39].…”

Section: Contrast Mediamentioning

confidence: 99%

“…Such species include, among others, N-DBPs (e.g., haloacetonitriles and haloacetamides) and I-DBPs (e.g., monoiodoacetic acid (MIAA)) [7,8]. Some TrOCs groups, notably iodine-containing contrast media (ICMs) used in medical imaging [9,10] and frequently encountered in the environment [11,12] have been shown to be precursors of I-DBPs formed via the degradation of ICMs by halo-gen-based disinfectants or reactive oxygen species (ROS) formed in advanced oxidation processes (AOPs), as well as in EC treatment that involves both oxidation and reduction [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical dehalogenation of disinfection by-products and iodine-containing contrast media: A review

Korshin

Yan

2018

Environmental Engineering Research

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This paper summarizes results of research on the electrochemical (EC) degradation of disinfection by-products (DBPs) and iodine-containing contrast media (ICMs), with the focus on EC reductive dehalogenation. The efficiency of EC dehalogenation of DBPs increases with the number of halogen atoms in an individual DBP species. EC reductive cleavage of bromine from parent DBPs is faster than that of chlorine. EC data and quantum chemical modeling indicate that the EC reduction of iodine-containing DBPs (I-DBPs) is characterized by the formation of active iodine that reacts with the organic substrate. The occurrence of ICMs has attracted attention due to their association with the generation of I-DBPs. Indirect EC oxidation of ICMs using anodes that produce reactive oxygen species can result in a complete degradation of these compounds yet I-DBPs are formed in the process. Reductive EC deiodination of ICMs is rapid and its overall rate is diffusion-controlled yet I-DBPs are also produced in this reaction. Further progress in practically feasible EC methods to remove DBPs, ICMs and other trace-level organic contaminants requires the development of novel electrocatalytic materials, elimination of mass transfer limitations via innovative design of 3D electrodes and EC reactors, and further progress in the understanding of intrinsic mechanisms of EC reactions of DBPs and TrOC at EC interfaces.

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Section: Contrast Mediamentioning

confidence: 99%

Section: Contrast Mediamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electrochemical dehalogenation of disinfection by-products and iodine-containing contrast media: A review

Korshin

Yan

2018

Environmental Engineering Research

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“…As higher is the dosage of chlorine, greater is the formation of THM and free chlorine has greater capacity to form THM than combined chlorine [20] [21] [22]. Furthermore, the World Health Organization (WHO) considers that for a satisfactory disinfection, 0.5 mg/L of free residual chlorine is enough, but adverse effects are not observed in the case of concentrations of 5 mg/L [14].…”

Section: Resultsmentioning

confidence: 99%

Levels of Trihalomethanes in Stored Water from High and Fundamental Schools: Comparison between Two Temporal Data Sets

Andreola¹,

Mannigel²,

Bido³

et al. 2018

JWARP

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Epidemiological studies have been investigating the relationship between chlorination byproducts exposure and cancer. Studies showed the incidence of colon, rectum and bladder cancer in laboratory animals when halogenated byproducts were administered to them, such as trihalomethanes. Based on this fact, in this work, two data sets of water quality parameters were analyzed with focus on total trihalomethanes (THMt). These two data sets are from two different time periods (one in 2014 and other in 2017). All the samples were collected in the same months, in both data sets. The samples were taken from its same corresponding sampling points in both periods of time. Trihalomethanes (THMs) are undesired byproducts of chlorination and its formation occurs when the chlorine used in water treatment reacts with natural organic matter, which is present in natural waters, during the disinfection process. The aim of this research was to investigate the THMs levels in storage water from the chlorination performed by the Water Treatment Station (WTS) of the Maringá-Parana-Brazil; also, to compare the results obtained with the maximum allowable values (MAVs) established by the Consolidation Resolution n.05/2017, current law of water quality in Brazil. Water samples were collected in eight high and fundamental schools of Maringá-Paraná-Brazil and analyzed through the gas chromatography method by the use of mass spectrometry detector with purge-and-trap concentrator (GC-MS) for THM. Furthermore, parameters such as pH and residual chlorine were analyzed following the methodology proposed by the Standard Methods for the Examination of Water and Wastewater. The study results to THMt show that the maximum value of 21.5 µg/L obtained is within the MAV of 100 µg/L. Chloroform was

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“…Research on the formation of iodine containing disinfection by-products (I-DBPs) in disinfected waters has recently become a new matter of scientific concern, since these compounds have been reported to be more toxic than their corresponding brominated and chlorinated analogues (Richardson et al 2007;Plewa et al 2008;Richardson et al 2008a;Attene-Ramos et al 2010;Plewa et al 2010;Pals et al 2011;Wei et al 2013a;Yang et al 2014;Richardson et al 2015;Jeong et al 2016). This DBP class forms after disinfection of source waters that contain Iˉ or different iodine sources, such as X-ray contrast media (Duirk et al 2011;Wang et al 2014;Wendel et al 2014;Ye et al 2014;Wendel et al 2016) and microbially derived organic matter (Wei et al 2013b). I-DBPs also form during iodine-based disinfection of drinking water and wastewater (Smith et al 2010;Hladik et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Formation of iodo-trihalomethanes, iodo-haloacetic acids, and haloacetaldehydes during chlorination and chloramination of iodine containing waters in laboratory controlled reactions

Postigo

Richardson

Barceló

2017

Journal of Environmental Sciences

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Comparison of iodinated trihalomethanes formation during aqueous chlor(am)ination of different iodinated X-ray contrast media compounds in the presence of natural organic matter

Cited by 53 publications

References 28 publications

Electrochemical dehalogenation of disinfection by-products and iodine-containing contrast media: A review

Electrochemical dehalogenation of disinfection by-products and iodine-containing contrast media: A review

Levels of Trihalomethanes in Stored Water from High and Fundamental Schools: Comparison between Two Temporal Data Sets

Formation of iodo-trihalomethanes, iodo-haloacetic acids, and haloacetaldehydes during chlorination and chloramination of iodine containing waters in laboratory controlled reactions

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