Cited by 282Adsorption and biosorption for pollutant removalHeavy metals in environmentEnvironmental remediation with nanomaterials

Surface characteristics of crop-residue-derived black carbon and lead(II) adsorption

Qiu, Yuping, Cheng, Haiyan, Xu, Chao, Sheng, G. Daniel·2008·Water Research

Abstract

Previous studies demonstrated that black carbon (BC) in soils arising from the burning of crop residues is a highly effective adsorbent for organic contaminants. This work evaluated the adsorptive ability of BC for heavy metals in relation to the BC surface characteristics. Two BC samples, rice carbon (RC) and wheat carbon (WC) isolated from the burning residues of rice straw and wheat straw, respectively, were characterized for their surface properties with reference to a commercial activated carbon (AC). While RC and WC had lower surface areas than AC, the two BC samples possessed higher surface acidities and thus lower pH of the isoelectric points (pH IEP) than AC as indicated by titration, FTIR, and zeta potential measurements. The Pb(II) adsorption by RC and WC was higher than that by AC and increased significantly with increasing pH, suggesting the electrostatic interactions between positive Pb(II) species and negatively charged functional groups on RC and WC as the primary adsorptive forces. A reduction in the total positive charge of Pb(II) species with increasing pH as computed by MINTEQA2 suggested that the deprotonation of surface functional groups of RC and WC was the controlling factor of the adsorption. The Pb(II) adsorption decreased with increasing ionic strength, due to the screening role of Na+ in neutralizing the negative charge of RC and WC. This study demonstrated that BC may be an important adsorbent of heavy metals in soil and that the adsorption may be significantly influenced by environmental conditions.

Integrity signals

Registry

Crossref · 10.1016/j.watres.2007.07.051

Cites

33 of 33 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Qiu, Y., Cheng, H., Xu, C., & Sheng, G. D.
Affiliations
  • Zhejiang University of Technology (CN)
  • East China Normal University (CN)
Corresponding author
Qiu, Yuping
Venue
Water Research
Publisher
Elsevier BV
Published
2008-02
Volume
42
Issue
3
Pages
567-574
ISSN
0043-1354 (ISSN-L)
OpenAlex
W2064730258
Cited by
282
References
33
Citations by year
2026: 5 · 2025: 14 · 2024: 14 · 2023: 13 · 2022: 11 · 2021: 23 · 2020: 19 · 2019: 14 · 2018: 18 · 2017: 18 · 2016: 16 · 2015: 16 · 2014: 27 · 2013: 23 · 2012: 8
FWCI
10.74
Type
journal article
Language
en
Open access
closed
Locations
  • Water Research (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
  • Physical Sciences › Environmental Science › Pollution › Heavy metals in environment
  • Physical Sciences › Engineering › Biomedical Engineering › Environmental remediation with nanomaterials
Keywords
black carbon, crop residue burning, lead adsorption, heavy metal adsorption, rice straw, wheat straw, surface acidity, isoelectric point, surface functional groups, electrostatic interactions, ionic strength effects, soil adsorbents, activated carbon comparison
MeSH terms
Adsorption, Agriculture, Carbon, Hydrogen-Ion Concentration, Lead, Oryza, Soil Pollutants, Surface Properties, Triticum, Spectroscopy, Fourier Transform Infrared, Crops, Agricultural

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