Environmentally persistent free radicals mediated removal of Cr(VI) from highly saline water by corn straw biochars
Abstract
Heavy metal ions coexisting with salts in the contaminant water are difficult to remove due to the interference of salts. Herein, biochars were pyrolyzed by corn straw at different temperatures, aiming to remove Cr(VI) in the presence of salts. Results show that biochars had surprisingly selective adsorption of Cr(VI). X-ray photoelectron and X-ray absorption near edge spectra revealed that Cr(VI) was reduced to Cr(III). All the adsorption was conducted at pH ∼ 7, which differed from the previous studies that Cr(VI) could only be reduced at pH 2-4. Environmental persistent free radicals (EPFRs) on biochars were found to play the role in reducing Cr(VI) in neutral solutions, which was confirmed by electron spin resonance and free radical quenching. The biochar with EPFRs reveals a highly selective removal of Cr(VI), which has implications for the remediation of contaminated water. This work provides a new insight into biochar's properties and potential environmental applications.
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
EPFRs consumption on corn straw biochar reduces Cr(VI) in solution and is accompanied by formation of quinone groups, suggesting a reversible electron donor-acceptor scenario of different RAMs on biochars.
“Zhao et al. demonstrated similar EPFRs consumption on corn straw biochar to reduce Cr(VI) in solution as accompanied by the formation of quinone groups, suggesting the reversible electron donor-acceptor scenario of different RAMs on biochars.94”
From Sustainable remediation with an electroactive biochar system: mechanisms and perspectives (2020) · cites this paper as [94]
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
The citation lists haven’t been fetched yet
References 45 · Cited by 191
Research works printed but not linked: 1
- [1][1]Ashkenazy, R., Gottlieb, L., Yannai, S., 1997. Characterization of acetone-washed yeast biomass functional groups involved in lead biosorption. Biotechnol. Bioeng. 55(1), 1-10. -
- Authors
- Zhao, N., Yin, Z., Liu, F., Zhang, M., Lv, Y., Hao, Z., Pan, G., & Zhang, J.
- Affiliations
- Sun Yat-sen University (CN)
- Chinese Academy of Sciences (CN)
- China Agricultural University (CN)
- Corresponding author
- Zhang, Meiyi
- Zhang, Jing
- Venue
- Bioresource Technology
- Publisher
- Elsevier BV
- Published
- 2018-07
- Volume
- 260
- Pages
- 294-301
- ISSN
- 0960-8524 (ISSN-L)
- OpenAlex
- W2795022169
- Cited by
- 191
- References
- 45
- Citations by year
- 2026: 14 · 2025: 20 · 2024: 29 · 2023: 26 · 2022: 21 · 2021: 27 · 2020: 30 · 2019: 18 · 2018: 5
- FWCI
- 8.75
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- Bioresource Technology (publishedVersion)
- PubMed (publishedVersion)
- Nottingham Trent University's Institutional Repository (Nottingham Trent Repository) (acceptedVersion)
- Funders
- Chinese Academy of Sciences
- National Basic Research Program of China (2016YFA0203101, 2017YFA0207204)
- Topics
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Engineering › Biomedical Engineering › Environmental remediation with nanomaterials
- Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Chromium effects and bioremediation
- Keywords
- hexavalent chromium removal, hexavalent chromium reduction, corn straw biochar, saline water, heavy metal adsorption, selective adsorption, biochar pyrolysis temperature, Cr(III) formation, water remediation
- MeSH terms
- Saline Waters, Adsorption, Charcoal, Chromium, Zea mays, Free Radicals, Hydrogen-Ion Concentration, Water Pollutants, Chemical
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
