Ultraviolet Light in Water and Wastewater Sanitation - Chapter 2 ppt

... of uridine in the UV range. 0 (J/m 2 ) 300 (J/m 2 ) 3000 (J/m 2 ) 0 500 20 2.5 20 7.5 21 2.5 21 7.5 22 2.5 22 7.5 23 2.5 23 7.5 24 2.5 λ nm 24 7.5 25 2.5 25 7.5 26 2.5 26 7.5 27 2.5 27 7.5 28 2.5 28 7.5 29 2.5 1000 1500 20 00 25 00 3000 I/mol.cm © ... 12% Right Left 0 .2 0.4 0.6 +37.5 −37.5 cm +25 .0 25 .0+ 12. 5 − 12. 5 Intensity, in W/m 2 at 1 m 10 5 5 2...

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... K O 2 H 2 O O 2 H 2 O H 2 O H 2 O H 2 O CO 2 H 2 O CO 2 H 2 O CO 2 0 0 0 .2 0.4 0.6 0.8 1.0 1 .2 1.4 1.6 1.8 2. 0 2. 2 2. 4 2. 6 2. 8 3.0 3 .2 λ (nm) 0.05 0.10 0.15 0 .20 0 .25 W cm 2 µm −1 © 20 02 by ... Yield 2. 4 .2 Medium- and High-Pressure Mercury Lamp Technologies 2. 4 .2. 1 General 2. 4 .2. 2 Emission of UV Light 2. 4 .2. 3 Voltage Input...

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... λλ λλ nm S( λλ λλ ) 21 0 0. 02 215 0.06 22 0 0. 12 225 0.18 23 0 0 .26 23 5 0.36 24 0 0.47 24 5 0.61 25 0 0.75 25 5 0.88 26 0 0.97 26 5 1.00 27 0 0.93 27 5 0.83 28 0 0. 72 285 0.58 29 0 0.45 29 5 0.31 300 0.18 305 ... bromate ion in water. 20 0 21 0 22 0 23 0 24 0 25 0 26 0 27 0 28 0 29 0 0 0.1 0 .2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 300 Absorption nm © 20 02 by...

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... I o ( λλ λλ ) 20 0 0. 02 1 0. 02 205 0.033 1.85 0.061 21 0 0.055 2. 45 0.13 21 5 0.089 3.15 0 .28 22 0 0.133 3.4 0.45 22 5 0 .20 6 3.35 0.69 23 0 0.3 3.15 0.95 23 5 0.47 2. 75 1 .29 24 0 0.76 2. 1 1.6 24 5 0.89 0.95 0.85 25 0 ... 1 3.45 3.45 25 5 0.98 5 .25 5.15 26 0 0.944 7.0 6.60 26 5 0.83 3.45 2. 86 27 0 0.63 2. 1 1. 32 275 0.47 1.55 0.73 28 0 0. 32 2.5 0.8 28 5 0...

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... propanols— 2- ( 2- hydroxypropoxy )-1 -propanol, 1-( 2- ethoxypropoxy ) -2 -propanol, 1-( 2- methoxypropoxy )-1 -propanol—at parts per billion levels appear unchanged at the preceding UV irradiation doses. Toxicity to fish of UV-treated ... PRELIMINARY CONCLUSIONS ON WASTEWATER DISINFECTION WITH ULTRAVIOLET 1. UV light technologies certainly are a valuable alternative for...

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... Environ. Technol., 12, 21 , 1991. NWRI, Ultraviolet Disinfection Guidelines for Drinking Water and Water Reuse, National Water Research Institute, Fountain Valley, CA, Dec. 20 00. Okatomo, K. ... Engineering, 91, 106, 1 42, 1911. Cortelyou, J.R. et al., Appl. Microbiol., 2, 22 7, 1954. Denis, M., Minon, G., and Masschelein, W.J., Ozone: Sci. Eng., 14,...

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... and Engineering and International Water Quality . He has collaborated in the peer reviewing process of many scientific and engineering jour- nals such as Ozone Science and Engineering ... Yield in the Gas Phase 9.1.5 .2 The Ozone Quantum Yield in Water 9 .2 Kinetics of the UV/H 2 O 2 System 9 .2. 1 Determination of Kinetic Parameters 9 .2. 1.1 The Abso...

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... 0. 42 Iodine 0.54 0 .26 Oxygen 0.40 0.19 OO O O 32 3 2 +•→•+ −− OFe FeO O 3 2 22 +→+ ++ NO H O e NO H 22 3 22 −−−+ +−→+ OH e OHO 322 22 ++→+ +− OHOe O OH E v o 32 2 21 24++→+ = −− . 20 04 ... O+→+++ −+ 22 2 2 BrO H O Br H O −− +→+ 22 2 BrO Br Br BrO −− +•→+• 22 22 BrO H O BrO BrO H•+ →++ −−+ BrO HO BrO OH 22 −− +•→•+ 2 224 BrO Br O•→ Br...

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... reactions (C Ab = 0) and Ha 1 > 1: (4.58) 4 .2. 2 .2 Irreversible Second-Order Reactions For the kinetics of the second-order gas–liquid reaction (4. 32) , the case of instan- taneous kinetic regime ... equalizing Equation (4 .23 ) and Equation (4 .24 ), the ratio between concen- trations of A in the bulk of the liquid and at the interface, C Ab /C A * , can be obtained. Then,...

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... HOT BB OHS S H H O T = + () ∑ 2 22 22 22 22 εφ φε r r k k R UV HOM H O HO BBH = 2 22 22 εφ φε 20 04 CRC Press LLC 9 .2 KINETICS OF THE UV/H 2 O 2 SYSTEM Baxendale and Willson 18 first studied ... from water and wastewater, 1. Kinetics of decomposition by ozonation, Ind. Eng. Chem. Res., 39, 22 14 22 20, 20 00. 36. Chang, P.B.L. and Young, T., Kinetics of methyl ter...

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