scholarly journals Optical Properties and Photochemical Production of Hydroxyl Radical and Singlet Oxygen after Ozonation of Dissolved Organic Matter

2021 ◽  
Author(s):  
Frank Leresche ◽  
Jeremy Torres ◽  
Tyler Kurtz ◽  
Urs von Gunten ◽  
Fernando Rosario
Keyword(s):  
Organic Matter ◽  
Optical Properties ◽  
Dissolved Organic Matter ◽  
Hydroxyl Radical ◽  
Singlet Oxygen ◽  
Light Absorption ◽  
Absorption Properties ◽  
Photochemical Production ◽  
Photochemical Properties

This study focuses on the effects of ozonation on the optical and photochemical properties of dissolved organic matter (DOM). Upon ozonation, a decrease in light absorption properties of DOM was...

Assessing the Source of the Photochemical Formation of Hydroxylating Species from Dissolved Organic Matter Using Model Sensitizers

2021 ◽  
Author(s):  
Kylie Couch ◽  
Frank Leresche ◽  
Claire Farmer ◽  
Garrett McKay ◽  
Fernando Rosario
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Singlet Oxygen ◽  
Natural Waters ◽  
Photochemical Formation ◽  
Photochemical Production

Dissolved organic matter (DOM) is ubiquitous in natural waters and can facilitate the chemi-cal transformation of many contaminants through the photochemical production of reactive inter-mediates, such as singlet oxygen (1O2),...

scholarly journals Spectral bio-optical properties of water of Atlantic sector of Antarctic

2020 ◽  
Vol 5 (4) ◽  
pp. 69-78
Author(s):  
N. A. Moiseeva ◽  
T. Ya. Churilova ◽  
T. V. Efimova ◽  
V. A. Artemiev ◽  
E. Yu. Skorokhod
Keyword(s):  
Organic Matter ◽  
Optical Properties ◽  
Dissolved Organic Matter ◽  
Absorption Coefficient ◽  
Chlorophyll A ◽  
Light Absorption ◽  
Colored Dissolved Organic Matter ◽  
Atlantic Sector ◽  
Light Absorption Coefficient ◽  
The Relationship

Studies of variability of spectral bio-optical properties of water of Atlantic sector of Antarctic were carried out during the 79th cruise of the RV “Akademik Mstislav Keldysh” (11.01.2020–04.02.2020). Chlorophyll a and phaeopigment concentration varied in the layer studied from 0.1 to 1.8 mg·m−3, except for two stations with content reaching 2.2 and 4.4 mg·m−3. The relationship was revealed between light absorption coefficient by phytoplankton and chlorophyll a concentration at a wavelength, corresponding to spectrum maxima: aph(438) = 0.044 × Ca1.2, r2 = 0.84 (n = 117); aph(678) = 0.021 × Ca1.1, r2 = 0.89 (n = 117). Spectral distribution of light absorption coefficient by non-algal particles and colored dissolved organic matter was described by exponential function. Absorption parameterization coefficients were retrieved: (1) light absorption coefficient by non-algal particles (0.001–0.027 m−1) and by colored dissolved organic matter (0.016–0.19 m−1) at a wavelength of 438 nm; (2) spectral slope coefficients of these components (0.005–0.016 and 0.009–0.022 nm−1, respectively).

Emerging investigator series: critical review of photophysical models for the optical and photochemical properties of dissolved organic matter

2020 ◽  
Vol 22 (5) ◽  
pp. 1139-1165 ◽  
Author(s):  
Garrett McKay
Keyword(s):  
Organic Matter ◽  
Optical Properties ◽  
Dissolved Organic Matter ◽  
Critical Review ◽  
Photochemical Properties

Photophysical models for dissolved organic matter optical properties and photochemistry are critically reviewed.

scholarly journals Effect of UV/chlorine treatment on photophysical and photochemical properties of dissolved organic matter

2021 ◽  
Vol 192 ◽  
pp. 116857
Author(s):  
Yangjian Zhou ◽  
Fangyuan Cheng ◽  
Dongyang He ◽  
Ya-nan Zhang ◽  
Jiao Qu ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Photochemical Properties
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