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- W2334972614 abstract "Ultraviolet (UV) irradiation is rapidly gaining acceptance as a broad spectrum, low maintenance, and cost effective method of disinfection. One limit to widespread adoption of UV disinfection systems is the formation of inorganic precipitates on the quartz jackets surrounding UV lamps. Surface fouling is problematic because it absorbs UV irradiation, reducing the dose applied to the water treated, and is most significant in waters with high concentrations of dissolved metals. One suspected precursor to lamp jacket fouling is aqueous phosphate. Phosphates are often added to drinking water to aid in sequestering dissolved metals and prevent distribution network corrosion, but orthophosphate and condensed phosphates may have the potential to speed lamp jacket fouling by combining with dissolved metals and precipitating onto lamp jacket surfaces. A low-pressure high-output (LPHO), mercury amalgam UV disinfection system was used in conjunction with water known to have a high fouling potential to better understand the relationship between water chemistry and fouling dynamics. A pilot-scale UV reactor was operated and fouling was quantified and compared to fouling observed during an experimental run with phosphate-dosed water. Significant decreases in radiation intensity and greater metal surface accumulation suggest that phosphate treatment of drinking water has the potential to worsen lamp jacket fouling in locations with high levels of hardness, and highlight the need for adequate pilot studies representing the entire spectrum of possible water compositions and treatment conditions prior to UV disinfection system implementation." @default.
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- W2334972614 date "2004-06-25" @default.
- W2334972614 modified "2023-10-18" @default.
- W2334972614 title "Fouling of Quartz Surfaces in Potable Water Ultraviolet Disinfection Systems: Effect of Phosphate Addition" @default.
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- W2334972614 doi "https://doi.org/10.1061/40737(2004)343" @default.
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