Unrecognized Role of Organic Acid in Natural Attenuation of Pollutants by Mackinawite (FeS): The Significance of Carbon-Center Free Radicals DOI
Kai Li, Shuanglong Ma,

Chuningrui Zou

et al.

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(49), P. 20871 - 20880

Published: Nov. 29, 2023

Organic acid is prevalent in underground environments and, against the backdrop of biogeochemical cycles on Earth, holds significant importance degradation contaminants by redox-active minerals. While earlier studies role organic generation reactive oxygen species (ROS) primarily concentrated electron shuttle or ligand effects, this study delves into combined impacts decomposition and Mackinawite (FeS) oxidation contaminant transformation under dark aerobic conditions. Using bisphenol A (BPA) as a model, our findings showed that oxalic (OA) notably outperforms other acids enhancing BPA removal, attaining rate constant 0.69 h-1. Mass spectrometry characterizations, coupled with anaerobic treatments, advocate for molecule-O2 activation principal mechanism behind pollutant transformation. Comprehensive results unveiled carbon center radicals, initiated hydroxyl radical (•OH) attack, serve primary agents oxidation, accounting at least 93.6% total •OH generation. This dynamic, driven concurrent formation carbon-centered ensures steady supply electrons ROS The obtained information highlights OA natural attenuation pollutants offers innovative strategies FeS acid-coupled decontamination.

Language: Английский

Single‐Atom Catalysts Originated from Metal–Organic Frameworks for Sulfate Radical‐Based Advanced Oxidation Processes: Critical Insights into Mechanisms DOI Open Access
Yaoning Chen,

Huayue Kang,

Min Cheng

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(6)

Published: Oct. 22, 2023

Abstract The widely discussed single‐atom catalysts (SACs) are regarded as a kind of attractive material for sulfate radical‐based advanced oxidation processes (SR‐AOPs) owing to their maximum atomic utilization efficiency and outstanding stability. Currently, metal–organic frameworks (MOFs) have appeared prospective precursors building SACs due extensive chelating sites, functional adjustability, structural tunability. However, there few critical systematic reviews about the application MOF‐derived in SR‐AOPs, especially in‐depth analysis mechanisms. Therefore, this review seeks offer thorough summary development SR‐AOPs. First, unique advantages MOFs derivative thoroughly. Afterward, current synthesis strategies elaborated categorically unveil formation process single atoms coordination environments. Notably, roles different reaction sites including generation reactive species mediating electron transfer further analyzed explain mechanisms comprehensively. Thereafter, characterization techniques theoretical calculations studies also highlighted. Eventually, insights into present challenges future developments proposed, which expected enhance catalytic

Language: Английский

Citations

39
Single atom catalyst-mediated generation of reactive species in water treatment DOI
Virender K. Sharma, Xingmao Ma, Radek Zbořil

et al.

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(22), P. 7673 - 7686

Published: Jan. 1, 2023

Unique activation mechanisms of oxidants by metal single atom catalysts for water treatment were compared with conventional advanced oxidation processes.

Language: Английский

Citations

34
Cu2O/BiVO4 heterostructure controllably triggers radical and non-radical persulfate activation via light “on-off” for efficient organic contaminants degradation DOI
Chengbo Bai, Wenjin Guo, Qiong Liu

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 344, P. 123606 - 123606

Published: Dec. 17, 2023

Language: Английский

Citations

29
Enhanced stability and conductivity of montmorillonite and sucrose loaded Fe-MOFs for degradation of chlortetracycline hydrochloride via electrochemically activated persulfate DOI
Hongxin Chen, Pengran Guo,

Zixi Huang

et al.

Applied Clay Science, Journal Year: 2023, Volume and Issue: 249, P. 107231 - 107231

Published: Dec. 28, 2023

Language: Английский

Citations

28
Unrecognized Role of Organic Acid in Natural Attenuation of Pollutants by Mackinawite (FeS): The Significance of Carbon-Center Free Radicals DOI
Kai Li, Shuanglong Ma,

Chuningrui Zou

et al.

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(49), P. 20871 - 20880

Published: Nov. 29, 2023

Organic acid is prevalent in underground environments and, against the backdrop of biogeochemical cycles on Earth, holds significant importance degradation contaminants by redox-active minerals. While earlier studies role organic generation reactive oxygen species (ROS) primarily concentrated electron shuttle or ligand effects, this study delves into combined impacts decomposition and Mackinawite (FeS) oxidation contaminant transformation under dark aerobic conditions. Using bisphenol A (BPA) as a model, our findings showed that oxalic (OA) notably outperforms other acids enhancing BPA removal, attaining rate constant 0.69 h-1. Mass spectrometry characterizations, coupled with anaerobic treatments, advocate for molecule-O2 activation principal mechanism behind pollutant transformation. Comprehensive results unveiled carbon center radicals, initiated hydroxyl radical (•OH) attack, serve primary agents oxidation, accounting at least 93.6% total •OH generation. This dynamic, driven concurrent formation carbon-centered ensures steady supply electrons ROS The obtained information highlights OA natural attenuation pollutants offers innovative strategies FeS acid-coupled decontamination.

Language: Английский

Citations

27