Disparate effects of DOM extracted from coastal seawaters and freshwaters on photodegradation of 2,4-Dihydroxybenzophenone

Wang, Jieqiong; Chen, Jingwen; Qiao, Xianliang; Zhang, Yanan; Uddin, Misbah; Guo, Zhongyu

doi:10.1016/j.watres.2018.12.045

Cited by 66 publications

(25 citation statements)

References 62 publications

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“…The quantum yields of 3 DOM * ( 3DOM * ) from SRFA and SRNOM were determined to be (4.66 ± 0.10) × 10 −3 and (4.07 ± 0.16) × 10 −3 , respectively ( Table 1 ), which is in the same order of magnitude as reported in a previous study ( Wang et al, 2019 ). After UV irradiation, the 3DOM * of SRFA and SRNOM decreased to be (3.84 ± 0.06) × 10 −3 and (3.79 ± 0.10) × 10 −3 , respectively ( Fig.…”

Section: Effect Of Uv/chlorine Treatment On 3 Dom * Generation From Srfa and Srnomsupporting

confidence: 77%

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

Zhou

Cheng

et al. 2021

Water Research

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Dissolved organic matter (DOM) is a ubiquitous component in effluents, DOM discharged with an effluent can affect the composition and properties of natural DOM in the receiving waters. As the photophysical and photochemical properties of effluent DOM can be changed by wastewater treatment processes, the effect of UV/chlorine treatment on the photophysical and photochemical properties of DOM was investigated using Suwannee River fulvic acid (SRFA) and Suwannee River natural organic matter (SRNOM) as representatives. Results showed that the absorbance of the two DOM was significantly decreased. The evolution trends of three representative photophysical parameters upon increase of chlorine dosages were observed. Also, a decrease in DOM aromaticity, molecular weight and electron-donating capacity was observed upon increasing chlorine dosage. Quantum yields of excited triplet state of DOM ( 3 DOM * ), singlet oxygen ( 1 O 2 ) and hydroxyl radicals ( •OH) first decreases and then increased in the UV/chlorine systems upon increasing chlorine dosages due to the different reaction pathways of the two DOM. Moreover, 3 DOM * can not only be regarded as a "controller" of other reactive intermediates, but also effectively promote the photodegradation of bezafibrate, which is classified as a persistent organic contaminant. This study gives deep insights into effects of UV/chlorine on the photophysical and photochemical properties of DOM, and is helpful for understanding the dynamic roles of DOM in the photodegradation of micropollutants.

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Section: Effect Of Uv/chlorine Treatment On 3 Dom * Generation From Srfa and Srnomsupporting

confidence: 77%

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

Zhou

Cheng

et al. 2021

Water Research

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“…Compared with the DOM extracted from freshwater, the value of SUVA254 in this study was admittedly lower, indicated autochthonous-dominated DOM origin (Wang et al, 2019). E2/E3 as a surrogate of the relative molecular weight of humic solutes was calculated to evaluate the relative size of DOM molecules (Helms et al, 2008;Wang et al, 2019). The value of E2/E3 for SDOM was higher than the humic substance fractions as reported before (Peuravuori and Pihlaja, 1997;Lou et al, 2006;, which indicated its lower average molecular weight.…”

Section: Absorption Spectra Analysismentioning

confidence: 45%

The Binding Characteristics of Sediment-Derived Dissolved Organic Matter with Ceftazidime: A Microstructural and Spectroscopic Correlation Study

Cai¹,

Qi²,

Xiao-li³

et al. 2021

Preprint

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This research focused on the characterization of sediment-derived DOM (SDOM) extracted from sediment of Yellow River and the binding behaviors of ceftazidime (CAZ) with the presence of SDOM. The morphology, surface composition and structure of SDOM and the complexation between SDOM and CAZ in terms of component features, binding capacity and sequence were studied by multiple approaches. Results showed that SDOM was in situ autochthonous-dominated with a low weight-average molecular weight and aromaticity. The multiple morphological characteristics, high surface oxygen contents (53.49%) and more aliphatic of SDOM were further confirmed. Studies on SDOM-CAZ interaction suggested that the functional groups and chemical compositions of SDOM were susceptible to CAZ. In more detail, the aromatic protons and aliphatic protons of CAZ impacted significantly and the binding between CAZ and SDOM might relate to noncovalent. The protein-like fractions were considered to primary participant and the aromatics and amides as mainly active sites interaction with CAZ. These findings have significant implications on the environmental fate of cephalosporin antibiotics and that of sediment-derived DOM.

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“…根据产生方式, S-DOM以微生物源为主导 [65] . 对于微生物源占比高的S-DOM, 其Φ PPRIs 也比淡水陆源 DOM高 [65] , 而PPRIs的稳态浓度却比淡水陆源DOM低, 这主要由于S-DOM经历了长时间的光漂白作用, 导致图 3 根据仪器表征结果推断的不同来源DOM的结构模型 [68,69] .…”

Section: 不同来源Dom对omps光降解的影响机理unclassified

“…根据产生方式, S-DOM以微生物源为主导 [65] . 对于微生物源占比高的S-DOM, 其Φ PPRIs 也比淡水陆源 DOM高 [65] , 而PPRIs的稳态浓度却比淡水陆源DOM低, 这主要由于S-DOM经历了长时间的光漂白作用, 导致图 3 根据仪器表征结果推断的不同来源DOM的结构模型 [68,69] . (a) 风化褐煤(leonardite)腐殖酸; (b) 富羧基的脂肪族分子; (c) 木质素衍生物 Figure 3 Molecular structural models proposed for DOM derived from different sources based on instrumental characterization [68,69] .…”

Section: 不同来源Dom对omps光降解的影响机理unclassified

Effects of dissolved organic matter on photochemicaltransformation of organic micropollutants in natural waters

Guo¹,

Chen²,

Zhang³

et al. 2020

Chin. Sci. Bull.

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Disparate effects of DOM extracted from coastal seawaters and freshwaters on photodegradation of 2,4-Dihydroxybenzophenone

Cited by 66 publications

References 62 publications

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

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

The Binding Characteristics of Sediment-Derived Dissolved Organic Matter with Ceftazidime: A Microstructural and Spectroscopic Correlation Study

Effects of dissolved organic matter on photochemicaltransformation of organic micropollutants in natural waters

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