Cited by 91Adsorption and biosorption for pollutant removalThermochemical Biomass Conversion ProcessesPhosphorus and nutrient management

Coeffect of pyrolysis temperature and potassium phosphate impregnation on characteristics, stability, and adsorption mechanism of phosphorus-enriched biochar

Zhang, Han, Liao, Wei, Zhou, Xiaoming, Shao, Jingai, Chen, Yingquan, Zhang, Shihong, Chen, Hanping·2022·Bioresource Technology

Abstract

Potassium phosphate (K 3 PO 4 )-impregnated bamboo was pyrolyzed at temperatures ranging from 350 to 950 °C to explore the coeffect of pyrolysis temperature and K 3 PO 4 impregnation on biochar's characteristics and adsorption behavior. The degree of aromatization and graphitization in phosphorus-enriched biochars (PRBCs) rose as temperature increased, whereas H/C and O/C ratios, pH value, and O-containing group content decreased. The pre-aging impact of K 3 PO 4 impregnation results in increased stability and adsorption performance of PRBCs. Adsorption mechanism of PRBCs to heavy metal varies from pyrolysis temperature. Micropores dominate medium-temperature PRBCs (prepared at 550 ∼ 750 °C), possessing the highest P-containing group content (116 % that of PRBC-350) and maximal adsorption capacity (greater than289 mg/g). The medium-temperature PRBCs adsorb Cd (II) via the role of O-containing groups, PO 4 3- , and P 2 O 7 4- , mainly by reactions of organic complexation, precipitation and inorganic complexation, respectively. 550 °C is the optimal pyrolysis temperature for both energy saving and heavy metal adsorption.

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Crossref · 10.1016/j.biortech.2021.126273

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Authors
Zhang, H., Liao, W., Zhou, X., Shao, J., Chen, Y., Zhang, S., & Chen, H.
Affiliations
State Key Laboratory of Coal Combustion (CN)
Corresponding author
Zhang, Shihong
Venue
Bioresource Technology
Publisher
Elsevier BV
Published
2022-01
Volume
344
Issue
Pt B
Pages
126273
ISSN
0960-8524 (ISSN-L)
OpenAlex
W3208035224
Cited by
91
References
44
Citations by year
2026: 14 · 2025: 20 · 2024: 26 · 2023: 19 · 2022: 12
FWCI
4.25
Type
journal article
Language
en
Open access
closed
Locations
  • Bioresource Technology (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Natural Science Foundation of China (51976075)
Topics
  • Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
  • Physical Sciences › Engineering › Biomedical Engineering › Thermochemical Biomass Conversion Processes
  • Physical Sciences › Environmental Science › Waste Management and Disposal › Phosphorus and nutrient management
Keywords
pyrolysis temperature, heavy metal adsorption, cadmium adsorption, adsorption mechanism, biochar stability, micropores, organic complexation, precipitation chemistry
MeSH terms
Pyrolysis, Adsorption, Charcoal, Phosphates, Phosphorus, Temperature, Potassium Compounds

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