Occurrence of disinfection by-products in low DOC surface waters in Turkey

Ateş, Nuray; Kaplan, Sibel; Şahinkaya, Erkan; Kitiş, Mehmet; Dilek, Filiz B.; Yetış, Ülkü

doi:10.1016/j.jhazmat.2006.08.076

Cited by 86 publications

(52 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In support, the annual average dissolved organic carbon concentrations of the raw water of TDWTP and BDWTP were reported as 3.06 and 1.80 mg/L, respectively, in 2004 (Ates et al, 2007). The number of samples from BDWTP, in this study, was less than TDWTP because the plant supplied water to the system for only five months of the sampling period.…”

Section: Water Quality and Operational Parametersmentioning

confidence: 62%

“…The levels of THMs in tap water samples from Ankara and Istanbul were found to be the highest in summer, although THM formation potential of the source waters was found to be highest in winter and autumn for Ankara and Istanbul, respectively, in the laboratory at constant temperature (Ates et al, 2007). This discrepancy may have risen due to the fact that all were conducted in different years.…”

Section: Introductionmentioning

confidence: 94%

“…The formation of DBPs is affected by several factors including water temperature and pH, nature and concentration of the natural organic matter (NOM), concentration of bromide ion, disinfectant type and dose, and residence time of water in the distribution system. The concentration of NOM is the most significant parameter affecting DBP formation (Liang and Singer, 2003;Ates et al, 2007). The temperature and pH also affect the reaction rates of chlorine depletion in water, and aqueous stability of DBPs (Villanova et al, 1997;Glezer et al, 1998;Kim et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

“…Many studies on seasonal variation of THMs suggested that these compounds tend to be higher in summer since organic matter content of water source increases (Williams et al, 1998;Rodriguez et al, 2004). A recent study reported that (Ates et al, 2007) 16 of the 29 surface source waters of Turkey had the highest THM formation potential during winter, whereas six source waters had it in spring and autumn. There was no general trend for seasonal variation in formation potentials because there may be temporal and spatial variation in factors such as structure of NOM and reactivity of chlorine.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Seasonal variation in drinking water concentrations of disinfection by-products in IZMIR and associated human health risks

Baytak

Sofuoğlu

İnal

et al. 2008

Science of The Total Environment

View full text Add to dashboard Cite

Seasonal variation in concentrations of two different disinfection by-product groups, trihalomethanes (THMs) and haloacetonitriles (HANs), was investigated in tap water samples collected from five sampling points (one groundwater and four surface water sources) in İzmir, Turkey. Estimates of previously published carcinogenic and noncarcinogenic risks through oral exposure to THMs were re-evaluated using a probabilistic approach that took the seasonal concentration variation into account. Chloroform, bromoform, dibromochloromethane and dichloroacetonitrile were the most frequently detected compounds. Among these, chloroform was detected with the highest concentrations ranging from 0.03 to 98.4 µg/L. In tap water, at the groundwater supplied sampling point, brominated species, bromoform and dibromoacetonitrile, were detected at the highest levels most probably due to bromide ion intrusion from seawater. The highest total THM and total HAN concentrations were detected in spring while the lowest in summer and fall. The annual average total THM concentration measured at one of the surface water supplied sampling points exceeded the USEPA's limit of 80 µg/L. While all non-carcinogenic risks due to exposure to THMs in İzmir drinking water were negligible, carcinogenic risk levels associated with bromodichloromethane and dibromochloromethane were higher than one in million. IntroductionChlorination of drinking water leads to formation of disinfection by-products (DBPs) which may create adverse health effects on human beings. The DBPs are formed as a result of reactions between the precursor materials (natural organic matter and bromide ion) and aqueous forms of the disinfectants. The major groups of DBPs are trihalomethanes (THMs), haloacetic acids (HAAs), haloacetonitriles (HANs), and halogenated ketones (HKs). THMs include four species; chloroform (CF), bromodichloromethane (BDCM), dibromochloromethane (DBCM) and bromoform (BF). Epidemiological studies have suggested that exposure to DBPs increases the risk of bladder, colon-rectum, leukemia, stomach and rectal cancers as well as abortion, low birth weight, and birth defects (IARC, 1991;Calderon, 2000;Villanueva et al., 2004). The formation of DBPs is affected by several factors including water temperature and pH, nature and concentration of the

show abstract

Section: Water Quality and Operational Parametersmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Seasonal variation in drinking water concentrations of disinfection by-products in IZMIR and associated human health risks

Baytak

Sofuoğlu

İnal

et al. 2008

Science of The Total Environment

View full text Add to dashboard Cite

show abstract

“…in the presence of HAA), meaning that there is not a competition effect and that the capacity of the sorbent is not saturated. (Ates et al 2007;Malliarou et al, 2005).…”

Section: Haloacetic Acidsmentioning

confidence: 99%

Novel insights in Al-MCM-41 precursor as adsorbent for regulated haloacetic acids and nitrate from water

Bruzzoniti

Carlo

Sarzanini

et al. 2012

Environ Sci Pollut Res

View full text Add to dashboard Cite

The definitive version is available at:La versione definitiva è disponibile alla URL: [http://link.springer.com/article/10.1007/s11356-012-0900-6] in groundwater has raised concern over possible contamination of drinking water supplies. In addition, the formation of haloacetic acids (HAAs) as by-products during disinfection with chlorine based agents is still a relevant issue, since HAAs pose serious health hazard. In this work, we investigated the affinity of a precursor of Al-MCM-41 (a mesostructured hexagonal alumino-silicate containing the template surfactant) towards nitrate and HAAs, for its possible application in the removal of these pollutants from natural and drinking waters. Additionally, adsorption kinetics and isotherms were studied.The affinity of the adsorbent was TCAA=DBAA=DCAA>MBAA>MCAA with DCAA, DBAA and TCAA completely removed. A removal as high as 77% was achieved for 13 mg/L nitrate. The adsorption isotherms of NO 3 -The adsorbent exhibited high affinity towards HAAs in simulated drinking water even at relevant matrix concentrations, suggesting its potential application for water remediation technologies. and monochloroacetic acid can be modeled by the Freundlich equation, while their adsorption kinetics follow a pseudo-second order rate mechanism.

show abstract