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Triazine surface water

Figure 13.10 LC-LC chromatogram of a surface water sample spiked at 2 p.g 1 with ati azine, and its metabolites (registered at 220 nm). Conditions volume of sample injected, 2 ml clean-up time, 2.60 min ti ansfer time, 4.2 min The blank was subtracted. Peak identification is as follows 1, DIA 2, HA 3, DEA 4, atrazine. Reprinted from Journal of Chromatography, A 778, F. Hernandez et al, New method for the rapid detemiination of triazine herbicides and some of thek main metabolites in water by using coupled-column liquid cliromatography and large volume injection , pp. 171-181, copyright 1997, with permission from Elsevier Science. Figure 13.10 LC-LC chromatogram of a surface water sample spiked at 2 p.g 1 with ati azine, and its metabolites (registered at 220 nm). Conditions volume of sample injected, 2 ml clean-up time, 2.60 min ti ansfer time, 4.2 min The blank was subtracted. Peak identification is as follows 1, DIA 2, HA 3, DEA 4, atrazine. Reprinted from Journal of Chromatography, A 778, F. Hernandez et al, New method for the rapid detemiination of triazine herbicides and some of thek main metabolites in water by using coupled-column liquid cliromatography and large volume injection , pp. 171-181, copyright 1997, with permission from Elsevier Science.
Y. Pico, A. J. H. Eouter, J. J. Vreuls and U. A. Th Brinkman, On-line tr-ace-level enrichment gas cliromatography of triazine herbicides, organophosphoms pesticides and organosulfur compounds from drinking and surface waters . Analyst 119 2025-2031 (1994). [Pg.376]

The primary ozonation by-products of atrazine (15 mg/L) in natural surface water and synthetic water were deethylatrazine, deisopropylatrazine, 2-chloro-4,6-diamino-s-triazine, a deisopropylatrazine amide (4-acetamido-4-amino-6-chloro-5-triazine), 2-amino-4-hydroxy-6-isopropylamino-5-triazine, and an unknown compound. The types of compounds formed were pH dependent. At high pH, low alkalinity, or in the presence of hydrogen peroxide, hydroxyl radicals formed from ozone yielded 5-triazine hydroxy analogs via hydrolysis of the Cl-Cl bond. At low pH and low alkalinity, which minimized the production of hydroxy radicals, dealkylated atrazine and an amide were the primary byproducts formed (Adams and Randtke, 1992). [Pg.1553]

P6 Atrazine (2-chloro-4-[ethylamino]-6-[isopropylamino]-l,3,5-triazine) is one of the most commonly used herbicides in North America and is frequently detected in ground and surface waters. This research investigated possible covalent modihcations of hemoglobin following in vivo exposures to atrazine in Sprague Dawley (SD) rats and in vitro incubations with diaminochlorotriazine. (From Dooley et ah, 2006)... [Pg.250]

Typically, only 0.01-10% of the mass of pesticide compounds applied to fields is detected in streams [91]. The remaining 90-99% of pesticides adsorb to soil, percolate into groundwater, or volatilize [79]. The major degradates of the most heavily used herbicides found in surface water have not been studied widely. Many chemical properties of pesticides affect the amounts transported to streams. In general, acetanilide herbicides are more soluble in water, and thus more mobile than are the triazines [92], The solubilities of sulfonated degradates of acetanilides (ethane sulfonic acid, or ESA), can be 10 times the solubility of the parent compound [93]. The greater mobilities of the degradates of the acetanilides (amide family) can explain these com-... [Pg.182]

Lawruk, T., C. Hottenstein, J. Fleeker, F. Rubio, and D. Herzog (1996). Factors influencing the specificity and sensitivity of triazine immunoassays. In Herbicide Metabolites in Surface Water and Groundwater. ACS Symposium Series 630. Washington, DC American Chemical Society, pp. 43-52. [Pg.267]

Triazine herbicides absorb sunlight weakly at wavelengths >290 nanometers (nm), thus, dissipation of the triazine herbicides in the atmosphere and in surface waters via photodegradation occurs mainly by indirect photolysis or photosensitized reactions. [Pg.329]

Although the downward transport of triazines by water is the most important route in evaluating the potential for presence in groundwater, other modes of transport away from the site of application should also be taken into consideration. These include plant uptake, upward transport to the soil surface by water, transport in surface runoff water and sediment, volatilization from the soil surface, spray drift during application, and movement on wind-eroded particles. This chapter will cover triazine transport across the soil surface and through the soil profile. [Pg.356]

Soil research studies show that there is a wide range in the amounts of triazine surface runoff. Of the research runoff studies summarized in Table 24.1, 57% had losses of <2% of applied chemical, and 77% had losses of <4%. Less than 7% of the studies had estimated losses of >10% of the applied chemical. The cumulative effects of many small runoff events have been modeled or estimated for a variety of surface water bodies (Pereira and Rostad, 1990 Albanis 1992 Pereira and Hostettler, 1993 Schottler et al., 1994). [Pg.356]

Du Preez, L.H., P.J. Jansen van Rensburg, A.M. Jooste, J.A. Carr, J.P. Giesy, T.S. Gross, R.J. Kendall, E.E. Smith, G. Van Der Kraak, and K.R. Solomon (2005a). Seasonal exposures to triazine and other pesticides in surface waters in the western Highveld corn-production region in South Africa. Environ. Pollut., 135 131-141. [Pg.436]

Solomon, K.R. and M.J. Chappel (1998). Triazine herbicides Ecological risk assessment in surface waters. In L.G. Ballantine, J.E. McFarland, and D.S. Hackett, eds., Triazine Herbicide Risk Assessment. ACS Symp. Series 683, Washington, DC, USA American Chemical Society, pp. 357-368. [Pg.438]

The United States Geological Survey (USGS) has provided extensive reviews on the distribution, trends, and governing factors on pesticides in groundwater and in surface water (Barbash and Resek, 1996 Larson et al, 1997 USGS, 2006). These reviews included data on several triazines and chlorotriazine metabolites and are helpful in understanding the environmental fate of triazines within the hydrologic cycle in the Midwestern United States. [Pg.440]

A Decade of Measuring, Monitoring, and Studying the Fate and Transport of Triazine Herbicides and their Degradation Products in Groundwater, Surface Water, Reservoirs, and Precipitation by the US Geological Survey... [Pg.451]

A number of major studies to analyze triazine herbicides and their degradation products (i.e., metabolites) in water have been carried out by the United States Geological Survey (USGS), Water Resources Division, in the Toxic Substances Hydrology Program. These studies investigated four major water resources - groundwater, surface water, reservoirs, and precipitation. [Pg.451]

Table 30.3 Percent detections of triazine herbicides and degradation products in surface water of the midwestern United States during 1989-1990 ... Table 30.3 Percent detections of triazine herbicides and degradation products in surface water of the midwestern United States during 1989-1990 ...
This section discusses the occurrence of the degradation products of atrazine, cyanazine, simazine, propazine, prom-etryn, and prometon, as well as their degradation pathways from soil into surface water. More detailed discussion of triazine degradation can be found in several other chapters of this book. [Pg.466]

An important finding of USGS research was the occurrence of triazine herbicides in surface water. In a study by Thurman et al. (1991, 1994) measurable amounts of atrazine, the most frequently detected herbicide, occurred in 91% of the pre-planting samples, 98% of the post-planting samples, and 76% of the harvest samples. The atrazine degradation product DEA was found in many of the samples that contained atrazine. The frequency of detection or apparent order of stability of the herbicides and their degradation products is as follows atrazine, DEA, DIA, and cyanazine. This stability order is based on results of field-dissipation studies on atrazine and cyanazine (Meyer, 1994 Mills and Thurman, 1994). [Pg.466]


See other pages where Triazine surface water is mentioned: [Pg.52]    [Pg.415]    [Pg.428]    [Pg.440]    [Pg.741]    [Pg.196]    [Pg.370]    [Pg.76]    [Pg.541]    [Pg.551]    [Pg.152]    [Pg.171]    [Pg.61]    [Pg.244]    [Pg.245]    [Pg.255]    [Pg.260]    [Pg.279]    [Pg.280]    [Pg.282]    [Pg.282]    [Pg.349]    [Pg.356]    [Pg.356]    [Pg.367]    [Pg.369]    [Pg.445]    [Pg.452]    [Pg.453]    [Pg.470]    [Pg.472]    [Pg.474]   
See also in sourсe #XX -- [ Pg.2 , Pg.198 ]




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