Cited by 63Adsorption and biosorption for pollutant removalEnvironmental remediation with nanomaterialsHeavy metals in environment

Lead competition alters the zinc adsorption mechanism on animal-derived biochar

Xue, Cong, Zhu, Ling, Lei, Sicong, Liu, Mengping, Hong, Chengyi, Che, Lei, Wang, Junliang, Qiu, Yuping·2020·Science of The Total Environment

Abstract

In this study, the adsorption behaviors and mechanisms of Pb(II) and Zn(II) by animal-derived biochar (ADB) in single and binary metal systems were comparatively investigated. ADB contains considerable amounts of Ca/P components and is mainly composed of hydroxyapatite (HAP), which plays an important role in the adsorption of Pb(II) and Zn(II). The maximum adsorption capacities of Pb(II) and Zn(II) on ADB were in the order of Zn(II)-single (3.23 mmol g-1) > Pb(II)-single (2.74 mmol g-1) ≈ Pb(II)-binary (2.71 mmol g-1) > Zn(II)-binary (2.31 mmol g-1). In the single metal system, approximately 99.9% of the adsorbed Pb(II) existed as Pb 5(PO 4)3 Cl, while the dominant adsorption mechanism of Zn(II) was cation exchange, followed by precipitation, accounting for 78.0%-80.6% and 19.4%-21.5% of the adsorption capacity, respectively. These findings were verified by X-ray diffraction refinement, X-ray photoelectron spectroscopy, metal speciation modeling, and Ca(II) exchange experiment. In the binary metal system, the proportion and form of Pb(II) precipitate remained unchanged. However, the binding of Zn(II) to ADB was completely dependent on the cation exchange with Ca(II), and no remarkable Zn(II) precipitation was observed. Phosphate released from HAP preferentially precipitated with Pb(II) than with Zn(II) when they coexisted. Consequently, Pb(II) competition may alter the Zn(II) adsorption mechanism on ADB. Nonetheless, ADB could serve as an efficient biochar for the simultaneous immobilization of Pb(II) and Zn(II) via different mechanisms.

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Crossref · 10.1016/j.scitotenv.2019.136395

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Authors
Xue, C., Zhu, L., Lei, S., Liu, M., Hong, C., Che, L., Wang, J., & Qiu, Y.
Affiliations
  • Tongji University (CN)
  • Huzhou Normal University (CN)
  • Zhejiang University of Technology (CN)
Corresponding author
Qiu, Yuping
Venue
Science of The Total Environment
Publisher
Elsevier BV
Published
2020-04
Volume
713
Pages
136395
ISSN
0048-9697 (ISSN-L)
OpenAlex
W2996775889
Cited by
63
References
44
Citations by year
2026: 9 · 2025: 6 · 2024: 10 · 2023: 7 · 2022: 15 · 2021: 12 · 2020: 4
FWCI
2.91
Type
journal article
Language
en
Open access
closed
Locations
  • The Science of The Total Environment (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Natural Science Foundation of China (21677108)
  • National Key Research and Development Program of China (2018YFC1800602)
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 › Pollution › Heavy metals in environment
Keywords
lead adsorption, zinc adsorption, metal competition, hydroxyapatite, cation exchange, phosphate precipitation, metal speciation, heavy metal immobilization
MeSH terms
Adsorption, Animals, Charcoal, Lead, Zinc

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