Trade-offs in disinfection byproduct formation associated with precursor preoxidation for control of N-nitrosodimethylamine formation.

Chloramines in drinking water may form N-nitrosodimethylamine (NDMA). Various primary disinfectants can deactivate NDMA precursors prior to chloramination. However, they promote the formation of other byproducts. This study compared the reduction in NDMA formation due to chlorine, ozone, chlorine dioxide, and UV over oxidant exposures relevant to Giardia control coupled with postchloramination under conditions relevant to drinking water practice. Ten waters impacted by treated wastewater, poly(diallyldimethylammonium chloride) (polyDADMAC) polymer, or anion exchange resin were examined. Ozone reduced NDMA formation by 50% at exposures as low as 0.4 mg×min/L. A similar reduction in NDMA formation by chlorination required ∼60 mg×min/L exposure. However, for some waters, chlorination actually increased NDMA formation at lower exposures. Chlorine dioxide typically had limited efficacy regarding NDMA precursor destruction; moreover, it increased NDMA formation in some cases. UV decreased NDMA formation by ∼30% at fluences >500 mJ/cm(2), levels relevant to advanced oxidation. For the selected pretreatment oxidant exposures, concentrations of regulated trihalomethanes, haloacetic acids, bromate, and chlorite typically remained below current regulatory levels. Chloropicrin and trichloroacetaldehyde formation were increased by preozonation or medium pressure UV followed by postchloramination. Among preoxidants, ozone achieved the greatest reduction in NDMA formation at the lowest oxidant exposure associated with each disinfectant. Accordingly, preozonation may inhibit NDMA formation with minimal risk of promotion of other byproducts. Bromide >500 μg/L generally increased NDMA formation during chloramination. Higher temperatures increased NDMA precursor destruction by preoxidants but also increased NDMA formation during postchloramination. The net effect of these opposing trends on NDMA formation was water-specific.

[1]  W. Mitch,et al.  Halonitroalkanes, halonitriles, haloamides, and N-nitrosamines: a critical review of nitrogenous disinfection byproduct formation pathways. , 2012, Environmental science & technology.

[2]  Boris Mizaikoff,et al.  PolyDADMAC and dimethylamine as precursors of N-nitrosodimethylamine during ozonation: reaction kinetics and mechanisms. , 2011, Environmental science & technology.

[3]  K. Linden,et al.  Impact of UV disinfection combined with chlorination/chloramination on the formation of halonitromethanes and haloacetonitriles in drinking water. , 2011, Environmental science & technology.

[4]  D. Sedlak,et al.  The Chlorine Dilemma , 2011, Science.

[5]  William A Arnold,et al.  Kinetics and mechanisms of N-nitrosodimethylamine formation upon ozonation of N,N-dimethylsulfamide-containing waters: bromide catalysis. , 2010, Environmental science & technology.

[6]  K. Linden,et al.  Effect of UV treatment on DBP formation , 2010 .

[7]  S. Walse,et al.  Quaternary amines as nitrosamine precursors: a role for consumer products? , 2010, Environmental science & technology.

[8]  Baiyang Chen,et al.  Occurrence of disinfection byproducts in United States wastewater treatment plant effluents. , 2009, Environmental science & technology.

[9]  Martin Krauss,et al.  Occurrence and removal of N-nitrosamines in wastewater treatment plants. , 2009, Water research.

[10]  P. Westerhoff,et al.  Nitrogen enriched dissolved organic matter (DOM) isolates and their affinity to form emerging disinfection by-products. , 2009, Water science and technology : a journal of the International Association on Water Pollution Research.

[11]  Baiyang Chen,et al.  Impact of wastewater treatment processes on organic carbon, organic nitrogen, and DBP precursors in effuent organic matter. , 2009, Environmental science & technology.

[12]  Boris Mizaikoff,et al.  Degradation of amine-based water treatment polymers during chloramination as N-nitrosodimethylamine (NDMA) precursors. , 2009, Environmental science & technology.

[13]  P. Westerhoff,et al.  Nitrosamine, dimethylnitramine, and chloropicrin formation during strong base anion-exchange treatment. , 2009, Environmental science & technology.

[14]  S. Kunikane,et al.  Formation of N-nitrosodimethylamine (NDMA) by ozonation of dyes and related compounds. , 2008, Chemosphere.

[15]  R. L. Valentine,et al.  The influence of the pre-oxidation of natural organic matter on the formation of N-nitrosodimethylamine (NDMA). , 2008, Environmental science & technology.

[16]  Robert C Andrews,et al.  Formation of N-nitrosamines from eleven disinfection treatments of seven different surface waters. , 2008, Environmental science & technology.

[17]  W. Mitch,et al.  Degradation of tertiary alkylamines during chlorination/chloramination: implications for formation of aldehydes, nitriles, halonitroalkanes, and nitrosamines. , 2008, Environmental science & technology.

[18]  Carsten K Schmidt,et al.  N,N-dimethylsulfamide as precursor for N-nitrosodimethylamine (NDMA) formation upon ozonation and its fate during drinking water treatment. , 2008, Environmental science & technology.

[19]  B. Kasprzyk-Hordern,et al.  N-nitrosodimethylamine (NDMA) formation during ozonation of dimethylamine-containing waters. , 2008, Water research.

[20]  W. Mitch,et al.  Enhanced nitrogenous disinfection byproduct formation near the breakpoint: implications for nitrification control. , 2007, Environmental science & technology.

[21]  Jeyong Yoon,et al.  Oxidation of N-nitrosodimethylamine (NDMA) precursors with ozone and chlorine dioxide: kinetics and effect on NDMA formation potential. , 2007, Environmental science & technology.

[22]  S. Hrudey,et al.  Breakpoint chlorination and free-chlorine contact time: implications for drinking water N-nitrosodimethylamine concentrations. , 2007, Water research.

[23]  W. Mitch,et al.  Nitrosamine formation pathway revisited: the importance of chloramine speciation and dissolved oxygen. , 2006, Environmental science & technology.

[24]  W. Mitch,et al.  Occurrence and fate of nitrosamines and nitrosamine precursors in wastewater-impacted surface waters using boron as a conservative tracer. , 2006, Environmental science & technology.

[25]  David L Sedlak,et al.  Characterization and fate of N-nitrosodimethylamine precursors in municipal wastewater treatment plants. , 2004, Environmental science & technology.

[26]  R. L. Valentine,et al.  N-nitrosodimethylamine formation by free-chlorine-enhanced nitrosation of dimethylamine. , 2003, Environmental science & technology.

[27]  R. Rhodes Trussell,et al.  N-Nitrosodimethylamine (NDMA) as a Drinking Water Contaminant: A Review , 2003 .

[28]  U. Gunten.  Ozonation of drinking water: part II. Disinfection and by-product formation in presence of bromide, iodide or chlorine. , 2003 .

[29]  David L. Sedlak,et al.  Precursors of N-Nitrosodimethylamine in Natural Waters , 2003 .

[30]  Mark D Sobsey,et al.  UV disinfection of Giardia lamblia cysts in water. , 2002, Environmental science & technology.

[31]  David L Sedlak,et al.  Formation of N-nitrosodimethylamine (NDMA) from dimethylamine during chlorination. , 2002, Environmental science & technology.

[32]  R. L. Valentine,et al.  Formation of N-nitrosodimethylamine (NDMA) from reaction of monochloramine: a new disinfection by-product. , 2002, Water research.

[33]  R. Trussell,et al.  NDMA Formation in Water and Wastewater , 2001 .

[34]  David A. Reckhow,et al.  CHLORINATION BY-PRODUCTS IN DRINKING WATERS - FROM FORMATION POTENTIALS TO FINISHED WATER CONCENTRATIONS , 1990 .

[35]  J. Hoigné,et al.  The formation of trichloronitromethane (chloropicrin) and chloroform in a combined ozonation/chlorination treatment of drinking water , 1988 .

[36]  J. D. Berg,et al.  A Review of Chlorine Dioxide in Drinking Water Treatment (PDF) , 1986 .

[37]  Susan A Andrews,et al.  Demonstration of 20 pharmaceuticals and personal care products (PPCPs) as nitrosamine precursors during chloramine disinfection. , 2011, Water research.

[38]  K. O'Halloran,et al.  Use of Lissamine Green B as a spectrophotometric reagent for the determination of low residuals of chlorine dioxide , 1991 .

[39]  J. Hoigne,et al.  Determination of ozone in water by the indigo method , 1981 .