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UV photolysis of nitrate: effects of natural organic matter and dissolved inorganic carbon and implications for UV water disinfection

Article Abstract:

Studies show that ultraviolet light (UV), which has been proven in the use of disinfecting wastewater, may also be an effective use against human pathogens such as Giardia and Cryptosporidium, thus making it a possible technology to use for disinfecting drinking water and to reduce the amount of chlorine used in order to lower disinfection byproducts levels in water. One of the concerns with using UV for water treatment is if the nitrite formed from nitrite photolysis could be a health hazard. A study that was conducted on the impact of nitrate formation during UV photolysis on water-quality showed that concentrations remained below the U.S. maximum contaminant level of 1 ppm and should not pose any health threats.

Government regulation, Administration of Air and Water Resource and Solid Waste Management Programs, Safe Drinking Water, Water Purification, Health aspects, Standards, Methods, Ultraviolet radiation, Coccidia, Cryptosporidium, Drinking water, Giardia

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Identification of new ozone disinfection byproducts in drinking water

Article Abstract:

The number of water treatment plants using ozone as a disinfectant is rising in the US, yet knowledge of the safety of ozone use in comparison with chlorine is minimal. This study used spectral identification techniques to examine the by-products of ozone-treated water.

Management, Gases industry, Industrial gases industry

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Identification of new drinking water disinfection byproducts formed in the presence of bromide

Article Abstract:

Ozone has long been used in Europe as a water treatment disinfectant, and preference for its use over chlorine is increasing in the US. This study identifies disinfectant byproducts that accompany bromine, such as bromate, a chemical found in ozonated water that causes cancer in laboratory animals.

All Other Basic Inorganic Chemical Manufacturing, Pollutants produced & recycled, Industrial inorganic chemicals, not elsewhere classified, Bromine, Technical

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