The vacuum UV photolysis of aqueous solutions of two saturated ditertiary ethers: a product and CIDNP study

1989 ◽  
Vol 48 (2-3) ◽  
pp. 219-232 ◽  
Author(s):  
Knut Hildenbrand ◽  
Heinz-Peter Schuchmann ◽  
Clemens von Sonntag
Keyword(s):  
Aqueous Solutions ◽  
Uv Photolysis ◽  
Vacuum Uv

Vacuum-UV-photolysis of aqueous solutions of citric and gallic acids

2008 ◽  
Vol 197 (2-3) ◽  
pp. 306-312 ◽  
Author(s):  
Natalia Quici ◽  
Marta I. Litter ◽  
André M. Braun ◽  
Esther Oliveros
Keyword(s):  
Aqueous Solutions ◽  
Uv Photolysis ◽  
Vacuum Uv

scholarly journals Degradation and transformation of natural organic matter accountable for disinfection byproduct formations by UV photolysis and UV/chlor(am)ine

2018 ◽  
Vol 79 (5) ◽  
pp. 929-937 ◽  
Author(s):  
Chanathip Hirun-Utok ◽  
Songkeart Phattarapattamawong
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Low Pressure ◽  
Haloacetic Acid ◽  
Uv Photolysis ◽  
Disinfection Byproduct ◽  
Proportional Relationship ◽  
Vacuum Uv ◽  
Potential Use

Abstract This research aimed to investigate the degradation of natural organic matter responsible for the formation of trihalomethane (THM), haloacetic acid (HAA) and haloacetonitrile (HAN) during ultraviolet (UV) photolysis and a co-exposure of UV with chlorine (UV/chlorine) and chloramine (UV/chloramine). Low pressure UV (LPUV) and vacuum UV (VUV) lamps were used for photolysis. VUV and LPUV irradiation changed aromatic/unsaturated structures to aliphatic ones, resulting in decreased THM and HAN formation. Following irradiation for 60 min, LPUV decreased THM and HAN by 16% ± 2% and 20% ± 6%, respectively. VUV decreased THM and HAN formation by 23% ± 3% and 20% ± 8%, respectively. HAA formation increased following photolysis. UV/chlorine treatment decreased THM, HAA and HAN. Higher chlorine doses had an inversely proportional relationship with THM and HAN formation. A chlorine dose of 4 mg·L−1 led to the greatest reductions, corresponding to 42% ± 2%, 10% ± 10% and 18% ± 6% for THM, HAA and HAN, respectively. UV/chloramine decreased the formation of THM more than UV/chlorine. With a chloramine dose of 4 mg·L−1, THM, HAA and HAN formation decreased by 74% ± 10%, 10% ± 10% and 11% ± 10%, respectively. This study showed the potential use of UV/chlor(am)ine for controlling the formation of THM, HAA and HAN.

Quantum yields for the production of O(1S), N(2D), and N2(A 3Σ+u) from the vacuum uv photolysis of N2O

1975 ◽  
Vol 62 (11) ◽  
pp. 4266-4273 ◽  
Author(s):  
G. Black ◽  
R. L. Sharpless ◽  
T. G. Slanger ◽  
D. C. Lorents
Keyword(s):  
Quantum Yields ◽  
Uv Photolysis ◽  
Vacuum Uv

Vacuum UV photolysis of n-1-hexene and 4-methyl-1-pentene

1980 ◽  
Vol 12 (3) ◽  
pp. 249-261 ◽  
Author(s):  
Hélène Deslauriers ◽  
Guy J. Collin
Keyword(s):  
Uv Photolysis ◽  
Vacuum Uv

Vacuum uv photolysis of N2O

1974 ◽  
Vol 61 (7) ◽  
pp. 2857-2859 ◽  
Author(s):  
M. J. McEwan ◽  
G. M. Lawrence ◽  
H. M. Poland
Keyword(s):  
Uv Photolysis ◽  
Vacuum Uv

UV photolysis of aqueous solutions of aliphatic peptides. An ESR and spin-trapping study

1980 ◽  
Vol 84 (25) ◽  
pp. 3378-3384 ◽  
Author(s):  
Yves F. Lion ◽  
Mikinori Kuwabara ◽  
Peter Riesz
Keyword(s):  
Aqueous Solutions ◽  
Spin Trapping ◽  
Uv Photolysis
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