Formation and Stabilization of Combustion-Generated, Environmentally Persistent Radicals on Ni(II)O Supported on a Silica Surface
Open accessAbstract
Previous studies have indicated environmentally persistent free radicals (EPFRs) are formed when hydroxyl- and chlorine-substituted aromatics chemisorbed on Cu(II)O and Fe(III)(2)O(3) surfaces and were stabilized through their interactions with the surface metal cation. The current study reports our laboratory investigation on the formation and stabilization of EPFRs on a Ni(II)O surface. The EPFRs were produced by the chemisorption of adsorbates on the supported metal oxide surface and transfer of an electron from the adsorbate to the metal center, resulting in reduction of the metal cation. Depending on the temperature and the nature of the adsorbate, more than one type of organic radical was formed. A phenoxyl-type radical, with g-value between 2.0029 and 2.0044, and a semiquinone-type radical, with g-value from 2.0050 to as high as 2.0081, were observed. The half-lives on Ni(II)O were long and ranged from 1.5 to 5.2 days, which were similar to what were observed on Fe(III)(2)O(3). The yields of the EPFRs formed on Ni(II)O were ~8× higher than on Cu(II)O and ~50× higher than on Fe(III)(2)O(3).
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Yield and categories of EPFRs on biochar are mainly dominated by the temperature condition corresponding to decomposition of the radical precursor.
“Overall, the yield and categories of EPFRs on biochar are mainly dominated by the temperature condition corresponding to the decomposition of radical precursor.89,97”
From Sustainable remediation with an electroactive biochar system: mechanisms and perspectives (2020) · cites this paper as [97]
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References 34 · Cited by 144
- Authors
- Vejerano, E., Lomnicki, S. M., & Dellinger, B.
- Affiliations
- Louisiana State University (US)
- Louisiana State University, Chemistry Department, 232 Choppin Hall, Baton Rouge, Louisiana 70803, United States
- ORCID
- Vejerano, Eric
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2012-08-17
- Volume
- 46
- Issue
- 17
- Pages
- 9406-9411
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- PMC
- PMC3597086
- OpenAlex
- W1993226975
- Cited by
- 144
- References
- 34
- Citations by year
- 2026: 9 · 2025: 14 · 2024: 15 · 2023: 16 · 2022: 14 · 2021: 14 · 2020: 12 · 2019: 12 · 2018: 7 · 2017: 8 · 2016: 6 · 2015: 4 · 2014: 7 · 2013: 6
- FWCI
- 3.77
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Environmental Science & Technology (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Civil War Book Review (submittedVersion)
- Funders
- Institute of Environmental Science and Research
- National Institutes of Health
- National Institute of Environmental Health Sciences (P42ES013648)
- Topics
- Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Toxic Organic Pollutants Impact
- Physical Sciences › Environmental Science › Water Science and Technology › Advanced oxidation water treatment
- Physical Sciences › Environmental Science › Water Science and Technology › Environmental and Analytical Chemistry Studies
- Keywords
- environmentally persistent free radicals, nickel oxide, chemisorption, phenoxyl radicals, semiquinone, g-value, metal oxide adsorbents
- MeSH terms
- Adsorption, Air Pollutants, Free Radicals, Hydrocarbons, Aromatic, Nickel, Silicon Dioxide, Surface Properties, Temperature
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