Non-Hydroxyl Radical Species Production during Dark Air Oxidation of Alluvial Soils DOI

Elora Bourbon,

Frédéric Averseng, P. Bonville

и другие.

ACS Earth and Space Chemistry, Год журнала: 2024, Номер 8(9), С. 1757 - 1770

Опубликована: Авг. 24, 2024

Natural environments subjected to hydrologically driven redox fluctuations are regarded as propitious contaminant degradation since they favor the cyclic oxygenation of Fe(II) minerals, which produces oxygen reactive species (ROS), such hydroxyl radical, OH•. However, identity these may vary a function physicochemical conditions and remains matter research. Here, using spin-trapping electron paramagnetic resonance (EPR) with 5,5-dimethyl-1-pyrroline N-oxide (DMPO) spin trap, we show that non-hydroxyl is produced in significant amounts upon air-oxidation alluvial soil suspensions (Seine River Basin, France). Indeed, among DMPO–OH•, DMPO–CO2•–, DMPO–alkyl• adducts observed, latter dramatically increases addition ethanol or, lesser extent, tert-butanol, especially phosphate buffer. This result reveals dominant species, interpret Fe(IV) it known oxidize alcohols alkyl• radicals favored by ligands. With buffer ethanol, production correlates initial reduced-state iron pool samples, determined Fe K-edge X-ray absorption spectroscopy (XAS). phyllosilicates, Fe(0) one core and, vivianite, found be most significantly oxidized phases oxygenation, pyrite appears less reactive. Hence, differing from OH•, forms presence soil-sourced phosphate. Our results therefore call further directly identify this putative investigate its ability degrade organic contaminants natural environments.

Язык: Английский

From Bulk to Nano: Formation, Features, and Functions of Nano-Black Carbon in Biogeochemical Processes DOI
Fei Lian, Baoshan Xing

Environmental Science & Technology, Год журнала: 2024, Номер 58(36), С. 15910 - 15925

Опубликована: Авг. 27, 2024

Globally increasing wildfires and widespread applications of biochar have led to a growing amount black carbon (BC) entering terrestrial ecosystems. The significance BC in sequestration, environmental remediation, the agricultural industry has long been recognized. However, formation, features, functions nanosized BC, which is one most active fractions continuum during global climate change, are poorly understood. This review highlights surface reactivity (sorption, redox, heteroaggregation), biotic, abiotic transformations nano-BC, its major differences compared other engineered nanomaterials. Potential nano-BC including suspending agent, soil amendment, nanofertilizer elucidated based on unique properties functions. Future studies suggested develop more reliable detection techniques provide multidimensional information samples, explore critical role promoting planetary health from perspective, extend multifield with lower footprint but higher efficiency.

Язык: Английский

Процитировано

9

The Effect of Redox Fluctuation on Carbon Mineralization in Riparian Soil: An Analysis of the Hotspot Zone of Reactive Oxygen Species Production DOI
Fuhao Liu, Yuanyuan Ding, Jing Liu

и другие.

Water Research, Год журнала: 2024, Номер 265, С. 122294 - 122294

Опубликована: Авг. 18, 2024

Язык: Английский

Процитировано

7

Enhancing the production of reactive oxygen species in the rhizosphere to promote contaminants degradation in sediments by electrically strengthening microbial extracellular electron transfer DOI
Xuepeng Wang, Qilin Yu,

Yijing Gong

и другие.

Journal of Hazardous Materials, Год журнала: 2024, Номер 479, С. 135644 - 135644

Опубликована: Авг. 24, 2024

Язык: Английский

Процитировано

5

Phosphate-Induced Acidic Microenvironment for Improved Contaminant Removal during FeS Oxygenation DOI
Rong-Rong Ding,

Junsheng Song,

Guangyu Bi

и другие.

Environmental Science & Technology, Год журнала: 2024, Номер 58(44), С. 19883 - 19892

Опубликована: Окт. 23, 2024

The coexistence of mackinawite (FeS) and phosphate is widely observed in natural systems. However, the underlying mechanism regarding how influences environmental behavior FeS, especially during FeS oxygenation aquatic systems, remains its fancy. This study for first time reported that presence phosphate, even at a low concentration 0.3 mM, significantly promoted FeS-mediated O

Язык: Английский

Процитировано

4

Novel oxidant-free VUV/Fe2+/oxalate process for high-efficiency removal of norfloxacin: Oxidation performance and synergistic mechanism DOI
Chuang Wang, Xiaohui Wang, Jinying Du

и другие.

Chemical Engineering Journal, Год журнала: 2024, Номер unknown, С. 157779 - 157779

Опубликована: Ноя. 1, 2024

Язык: Английский

Процитировано

4

Critical Roles of Low-Molecular-Weight Organic Acid in Enhancing Hydroxyl Radical Production by Ferrous Oxidation on γ-Al2O3 Mineral Surface DOI
Nihong Wen, Jinsong Liu, Wenxiu Qin

и другие.

Water Research, Год журнала: 2024, Номер 261, С. 122052 - 122052

Опубликована: Июль 5, 2024

Язык: Английский

Процитировано

3

Overlooked Roles and Transformation of Carbon-Centered Radicals Produced from Natural Organic Matter in a Thermally Activated Persulfate System DOI

Hengyi Fu,

Wenxiao Zheng,

Weijian Duan

и другие.

Environmental Science & Technology, Год журнала: 2024, Номер 58(33), С. 14949 - 14960

Опубликована: Авг. 10, 2024

The presence and induced secondary reactions of natural organic matter (NOM) significantly affect the remediation efficacy in situ chemical oxidation (ISCO) systems. However, it remains unclear how this process relates to radicals generated from between NOM oxidants. study, for first time, reported vital roles transformation pathways carbon-centered (CCR

Язык: Английский

Процитировано

3

Quasi-complexation reaction triggered by O2 activation of activated carbon: An overlooked mechanism and its applications DOI
Yan Wang, Wenhui An, Yuexing Wang

и другие.

Journal of environmental chemical engineering, Год журнала: 2025, Номер unknown, С. 116717 - 116717

Опубликована: Апрель 1, 2025

Язык: Английский

Процитировано

0

New Pathway Mediated by Humic Acid Facilitates Long-Distance Hydroxyl Radical Production during Crystalline Iron Mineral Oxygenation DOI
Wenbo Wu,

Hengyi Fu,

Huanxin Ma

и другие.

Environmental Science & Technology, Год журнала: 2025, Номер unknown

Опубликована: Май 29, 2025

Hydroxyl radicals (•OH) are extensively produced from crystalline iron minerals under redox oscillation, during which their oxidizing impact on pollutant dynamics is often limited by low transportation. While natural organic matter exists as a ubiquitous mediator, how it regulates the distance scale of •OH production in heterogeneous system remains poorly understood. This study, for first time, reports an unrecognized route mediated humic acid (HA) extending spatial range oxygenation reduced hematite (rHem). The results showed that HA facilitated redistribution surface to solution, posing inverse impacts oxidation efficacies pollutants with varying accessibilities. It was difficult explain enhanced free using electron shuttling quinones or dissolved Fe-HA complexes. Comprehensive evidence demonstrated adsorbed preferentially consumed surface-bound trigger solid-to-liquid propagation carbon-centered (CCR•), dominantly promoting formation secondary far surface. Reactive-transport simulation and situ fluorescence visualized interfacial centimeter-scale long-range CCR•. Fourier transform ion cyclotron resonance mass spectrometry verified role decarboxylation CCR• generation. These findings offer new insights into environmental fate cycling engineered systems, including those matter.

Язык: Английский

Процитировано

0

Accelerated removal of polycyclic aromatic hydrocarbon by amorphous boron- or citric acid-co-Fe(III) activated sodium percarbonate process: In aqueous solution and soil slurry DOI

Xianxian Sheng,

Tianliang Wang,

Guilu Zeng

и другие.

Journal of Water Process Engineering, Год журнала: 2025, Номер 75, С. 108053 - 108053

Опубликована: Июнь 1, 2025

Язык: Английский

Процитировано

0