Treatment, drinking water

The same questions about the safety of organic flocculants have been raised ia other countries. The most drastic response has occurred ia Japan (7,77) and Swit2edand (77) where the use of any synthetic polymers for drinking water treatment is not permitted. Alum and PAC are the principal chemicals used ia Japan (7). Chitin, a biopolymer derived from marine animals, has been used ia Japan (80,81). Maximum allowed polymer doses have been set ia Prance and Germany (77). [Pg.37]

Trihalomethanes. Wherever chlorine is used as a disinfectant in drinking-water treatment, trihalomethanes (THMs) generaUy are present in the finished water. The THMs usuaUy formed are trichloromethane (chloroform), bromodichloromethane, dibromochloromethane, and tribromomethane (bromoform). There are four main techniques for the analysis of THMs headspace, Hquid— Hquid extraction (Ue), adsorption—elution (purge—trap), and direct aqueous injection. The final step in each technique involves separation by gas—Hquid chromatography with a 2 mm ID coUed glass column containing 10 wt % squalene on chromosorb-W-AW (149—177 p.m (80—100 mesh)) with detection generaUy by electron capture. [Pg.233]

AST Standard 60for Drinking Water Treatment Chemicals, ANSl/NSF 60-1988. [Pg.492]

NSF International Certification Criteria for Drinking Water Treatment Units Various papers on adsorption and other technologies for drinking and wastewater applications, http //nsf.org/consumer/dwtuconsumer.html... [Pg.333]

ZENONEnvironmental Inc. Contains information on membrane technology and equipment descriptions and support services for drinking water treatment applications, http //www.zenonenv.com/zenon drinking water.html... [Pg.333]

USEPA. Technologies for Upgrading Existing or Designing New Drinking Water Treatment Facilities, EPA/625/4- 89/023, Office of Drinking Water, Cincinnati, OH, March 1990. [Pg.58]

And even a fraction, ideally all, of those that survive are removed and/or inactivated in the drinking water treatment facilities or by cooking the contaminated food. [Pg.153]

Huerta-Fontela M, Galceran MT, Ventura E (2008) Stimulatory drugs of abuse in surface waters and their removal in a conventional drinking water treatment plant. Environ Sci Technol 42(18) 6809-6816... [Pg.223]

Acero JL, K Stemmier, U van Gunten (2000) Degradation kinetics of atrazine and its degradation products with ozone and OH radicals a predictive tool for drinking water treatment. Environ Sci Technol 34 591-597. [Pg.38]

The emphasis that the FQPA placed on the assessment of pesticide residues in drinking water, for example, led to the collection and analysis of data on the effects of drinking water treatment processes on pesticide residues. These data were presented to the FIFRA Science Advisory Board to highlight the variability in the effects of treatment on different kinds of pesticides and the products formed and the variability of treatment processes employed at different locations and at different collection time intervals at an individual location. These complexities led to the current proposal... [Pg.614]

Groundwater Pump-and-Treat and Drinking Water Treatment. 1030... [Pg.986]

GROUNDWATER PUMP-AND-TREAT AND DRINKING WATER TREATMENT... [Pg.1030]

Treatment performance data for ongoing projects are shown in Tables 24.18 and 24.19, for pump-and-treat and drinking water treatment projects, respectively. Both types of projects treated groundwater with relatively high initial MTBE concentrations (>100,000 pg/L). The available data show that 10 of 11 drinking water treatment projects achieved treated MTBE concentrations of <50 pg/L, while the results for pump-and-treat were more widely distributed. [Pg.1032]

MTBE Performance Summary for 12 Ongoing Drinking Water Treatment Systems... [Pg.1032]

Aboveground Treatment Technologies Used at 70 Groundwater Pump-and-Treat Remediation and Drinking Water Treatment Projects... [Pg.1040]

Hexachloroethane may also be released to air during combustion and incineration of chlorinated wastes, from hazardous waste sites, and in small amounts during chlorination of sewage effluent prior to discharge and chlorination of raw water during drinking water treatment (Gordon et al. 1991 Howard 1989). [Pg.124]

Drinking water treatment, reverse osmosis in, 21 647. See also Water treatment Drip carburizing, case hardening by, 16 210... [Pg.290]

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