Photochemical behavior of dissolved organic matter in environmental surface waters: A review DOI Creative Commons
Yichen Xu, Yutong Zhang,

Longlong Qiu

et al.

Eco-Environment & Health, Journal Year: 2024, Volume and Issue: 3(4), P. 529 - 542

Published: July 3, 2024

As an important group of widespread organic substances in aquatic ecosystems, dissolved matter (DOM) plays essential role carbon recycling and transformation processes. The photochemical behavior DOM is one the main ways it participates these processes, attracts extensive attention. However, due to a variety sources water conditions, including both freshwater seawater environments, properties exhibit great differences. Nowadays, large number studies have focused on generation process reactive species (RS) from sunlit DOM, while little effort has been made so far provide comprehensive summary especially fresh saline ecosystems. In this review, we analyzed research hotspot photochemistry over last 30 years, summarizing photoreactive natural environments containing (both seawater) listing factors affecting rate, yield, RS photoproduction. Compared with freshwater, unique characteristics such as high pH value, ionic strength, halide ions, which affect photogeneration RS, photoconversion process, well reaction pathways various environmental substances. general, DOM-induced surface impacts toxic effects pollutants can even contribute significantly Earth's cycle, would potential implications for human ecological health.

Language: Английский

Monitoring dissolved organic matter in wastewater and drinking water treatments using spectroscopic analysis and ultra-high resolution mass spectrometry DOI

Weixin Shi,

Wan-E Zhuang,

Jin Hur

et al.

Water Research, Journal Year: 2020, Volume and Issue: 188, P. 116406 - 116406

Published: Sept. 9, 2020

Language: Английский

Citations

213
Singlet Oxygen Quantum Yields in Environmental Waters DOI Creative Commons
Rachele Ossola,

Oskar Martin Jönsson,

Kyle J. Moor

et al.

Chemical Reviews, Journal Year: 2021, Volume and Issue: 121(7), P. 4100 - 4146

Published: March 8, 2021

Singlet oxygen (1O2) is a reactive species produced in sunlit waters via energy transfer from the triplet states of natural sensitizers. There has been an increasing interest measuring apparent 1O2 quantum yields (ΦΔ) aquatic and atmospheric organic matter samples, driven part by fact that this parameter can be used for environmental fate modeling contaminants to advance our understanding dissolved photophysics. However, lack reproducibility across research groups publications remains challenge significantly limits usability literature data. In first review, we critically evaluate experimental techniques have determine ΦΔ values matter, identify quantify sources errors potentially explain large variability literature, provide general recommendations future studies. second part, qualitative overview known trends as function type, isolation extraction procedures, bulk water chemistry parameters, molecular spectroscopic features, chemical treatments, wavelength, season, location. This review supplemented with comprehensive database samples.

Language: Английский

Citations

193
Visible-light-assisted peroxymonosulfate activation by metal-free bifunctional oxygen-doped graphitic carbon nitride for enhanced degradation of imidacloprid: Role of non-photochemical and photocatalytic activation pathway DOI
Jie Tan, Zhifeng Li, Jie Li

et al.

Journal of Hazardous Materials, Journal Year: 2021, Volume and Issue: 423, P. 127048 - 127048

Published: Aug. 29, 2021

Language: Английский

Citations

111
Comparing Photoactivities of Dissolved Organic Matter Released from Rice Straw-Pyrolyzed Biochar and Composted Rice Straw DOI

Yafang Liu,

Minli Wang,

Shujun Yin

et al.

Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(4), P. 2803 - 2815

Published: Jan. 28, 2022

Here, we systematically compared the photoactivity and photobleaching behavior between dissolved black carbon (DBC) from rice straw biochar leached organic (LDOC) compost using complementary techniques. The Fourier transform-ion cyclotron resonance mass spectrometry (FT-ICR MS) analysis showed that DBC was dominated by polycyclic aromatic (55.1%) tannin-like molecules (24.1%), while LDOC lignin-like (58.9%) (19.7%). Under simulated sunlight conditions, had much higher apparent quantum yields for 3DOM* 1O2 but lower •OH than LDOC. After a 168 h irradiation, total number of formulas identified FT-ICR MS decreased 40.1% with concurrent increases in O/C H/C ratios also decreases double bond equivalence minus oxygen (DBE – O) average molecular weight gel permeation chromatography. However, despite large UVA254 DOC, only 12.0% nearly unchanged ratio, DBE O values, distribution, benzenepolycarboxylic condensation (BACon) index regardless percentage condensed (ConAC %). Compared LDOC, photolysis less oxidative destructive mainly via breakup small portion highly rings, probably accompanied photodecarboxylation.

Language: Английский

Citations

74
Dissolved Organic Matter Photoreactivity Is Determined by Its Optical Properties, Redox Activity, and Molecular Composition DOI
Stephanie M. Berg, Kristine H. Wammer, Christina K. Remucal

et al.

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(16), P. 6703 - 6711

Published: April 11, 2023

Predicting the formation of photochemically produced reactive intermediates (PPRI) during irradiation dissolved organic matter (DOM) has remained challenging given complex nature this material and differences in PPRI mechanisms. We investigate role DOM composition photoreactivity using 48 samples that span range freshwater systems wastewater. relate quantum yields for excited triplet-state (fTMP), singlet oxygen (Φ1O2), hydroxylating species (Φ•OH) to determined spectroscopy, Fourier-transform ion cyclotron resonance mass spectrometry, electron-donating capacity (EDC). fTMP Φ1O2 follow similar trends are correlated with bulk properties derived from UV–vis spectra EDC. In contrast, no individual property can be used predict Φ•OH. At molecular level, subset is positively both Φ•OH EDC distinct formulas related Φ1O2, demonstrating •OH 1O2 formed different fractions. Multiple linear regressions each parameters multiple techniques, complementary methods ideal characterizing because technique only a DOM.

Language: Английский

Citations

52
Spatiotemporal response of dissolved organic matter diversity to natural and anthropogenic forces along the whole mainstream of the Yangtze River DOI Creative Commons
Shuaidong Li, Lize Meng, Chu Zhao

et al.

Water Research, Journal Year: 2023, Volume and Issue: 234, P. 119812 - 119812

Published: March 1, 2023

Language: Английский

Citations

47
Prediction of Photochemical Properties of Dissolved Organic Matter Using Machine Learning DOI

Zhiyang Liao,

Jinrong Lu,

Kunting Xie

et al.

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(46), P. 17971 - 17980

Published: April 8, 2023

Apparent quantum yields (Φ) of photochemically produced reactive intermediates (PPRIs) formed by dissolved organic matter (DOM) are vital to element cycles and contaminant fates in surface water. Simultaneous determination ΦPPRI values from numerous water samples through existing experimental methods is time consuming ineffective. Herein, machine learning models were developed with a systematic data set including 1329 points predict the three ΦPPRIs (Φ3DOM*, Φ1O2, Φ·OH) based on DOM spectral parameters, conditions, calculation parameters. The best predictive performances for Φ3DOM*, Φ·OH achieved using CatBoost model, which outperformed traditional linear regression models. significances wavelength range parameters predictions revealed, suggesting that lower molecular weight, aromatic content, more autochthonous portion possessed higher ΦPPRIs. Chain constructed adding predicted Φ3DOM* as new feature into Φ1O2 models, consequently improved performance but worsened prediction likely due complex formation pathways ·OH. Overall, this study offered robust across interlaboratory differences provided insights relationship between PPRIs properties.

Language: Английский

Citations

46
Molecular-level exploration of properties of dissolved organic matter in natural and engineered water systems: A critical review of FTICR-MS application DOI

Mingqi Ruan,

Fengchang Wu,

Fuhong Sun

et al.

Critical Reviews in Environmental Science and Technology, Journal Year: 2023, Volume and Issue: 53(16), P. 1534 - 1562

Published: Jan. 2, 2023

Dissolved organic matter (DOM) contains complex molecular compounds that dominate its heterogeneous dynamics and behaviors in aquatic environments. Fourier transform ion cyclotron resonance mass spectrometry (FTICR-MS) with ultra-high resolution has proven to be effective characterizing DOM. However, a systematic summary of molecular-level compositions DOM natural engineered water systems remains insufficient. This study provides critical review characterization by FTICR-MS, emphasis on composition diversity, chemical properties, transformation, the systems. First, FTICR-MS strategies for are introduced data interpretation collaborative analysis complementary datasets (e.g. spectroscopic data). Second, characteristics, including spatiotemporal distribution, photochemical activity, microbial modification, interface adsorption environments were comprehensively summarized based current findings. Third, changes caused different treatment methods reviewed highlight variation, reaction, transformation focusing results. Finally, we limitations, biases, future directions extended studies natural/engineered-derived behavior. application favorable understanding chemistry

Language: Английский

Citations

43
Insight into the characterization of dissolved organic matter in shallow lakes with different trophic states and their net photo-generation capacity of reactive oxygen species DOI
Xiaolu Li, Zhen Hu,

Minli Guo

et al.

Water Research, Journal Year: 2025, Volume and Issue: unknown, P. 123204 - 123204

Published: Jan. 1, 2025

Language: Английский

Citations

2
Molecular-Level Transformation of Dissolved Organic Matter during Oxidation by Ozone and Hydroxyl Radical DOI
Christina K. Remucal,

Elisabeth Salhi,

Nicolas Walpen

et al.

Environmental Science & Technology, Journal Year: 2020, Volume and Issue: 54(16), P. 10351 - 10360

Published: July 22, 2020

Ozonation of drinking and wastewater relies on ozone (O3) hydroxyl radical (•OH) as oxidants. Both oxidants react with dissolved organic matter (DOM) alter its composition, but the selectivity two mechanisms reactivity DOM moieties are largely unknown. The reactions O3 •OH isolates were studied by varying specific doses (0.1–1.3 mg-O3/mg-C) at pH 7. Additionally, conditions that favor (i.e., addition an scavenger) or 11) investigated. decreases aromaticity, apparent molecular weight, electron donating capacity (EDC) large changes observed when is main oxidant (e.g., EDC 63–77% for 1.3 mg-O3/mg-C). highly aromatic, reduced formulas detected using high-resolution mass spectrometry (O:C = 0.48 ± 0.12; H:C 1.06 0.23), while also oxidizes more saturated (H:C 1.64 0.26). Established between model compounds one to oxygen atoms) atom decarboxylation) produce oxidized > 1.0). This study provides molecular-level evidence within DOM.

Language: Английский

Citations

128