Cited by 1,251Adsorption and biosorption for pollutant removalEnvironmental remediation with nanomaterialsHeavy metals in environment

Dairy-Manure Derived Biochar Effectively Sorbs Lead and Atrazine

Cao, Xinde, Ma, Lena, Gao, Bin, Harris, Willie·2009·Environmental Science & Technology

Abstract

Biochar (BC) produced from agricultural crop residues has proven effective in sorbing organic contaminants. This study evaluated the ability of dairy-manure derived biochar to sorb heavy metal Pb and organic contaminant atrazine. Two biochar samples were prepared by heating dairy manure at low temperature of 200 degrees C (BC200) and 350 degrees C (BC350). The untreated manure (BC25) and a commercial activated C (AC) were included as controls. Sorption of Pb by biochar followed a dual Langmuir-Langmuir model, attributing to Pb precipitation (84-87%) and surface sorption (13-16%). Chemical speciation, X-ray diffraction, and infrared spectroscopy indicated that Pb was precipitated as beta-Pb9(PO4)6 in BC25 and BC200 treatment, and as Pb3(CO3)2(OH)2 in BC350. Lead sorption by AC obeyed a single Langmuir model, attributing mainly to surface sorption probably via coordination of Pb d-electron to C==C (pi-electron) and --0--Pb bonds. The biochar was 6 times more effective in Pb sorption than AC, with BC200 being the most effective (up to 680 mmol Pb kg(-1)). The biochar also effectively sorbed atrazine where atrazine was partitioned into its organic phase, whereas atrazine uptake by AC occurred via surface sorption. When Pb and atrazine coexisted, little competition occurred between the two for sorption on biochar, while strong competition was observed on AC. Results from this study indicated that dairy manure can be converted into value-added biochar as effective sorbent for metal and/or organic contaminants.

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Crossref · 10.1021/es803092k

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Authors
Cao, X., Ma, L., Gao, B., & Harris, W.
Affiliations
Shanghai Jiao Tong University (CN)
Corresponding author
Cao, Xinde
Venue
Environmental Science & Technology
Published
2009-03-23
Volume
43
Issue
9
Pages
3285-3291
ISSN
  • 0013-936X (ISSN-L)
  • 1520-5851
OpenAlex
W2058297462
Cited by
1,251
References
31
Citations by year
2026: 50 · 2025: 54 · 2024: 52 · 2023: 75 · 2022: 94 · 2021: 99 · 2020: 116 · 2019: 105 · 2018: 103 · 2017: 125 · 2016: 74 · 2015: 72 · 2014: 75 · 2013: 55 · 2012: 45
FWCI
34.32
Type
journal article
Language
en
Open access
closed
Locations
  • Environmental Science & Technology (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Natural Science Foundation of China
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
biochar, dairy manure, lead sorption, atrazine, heavy metal contamination, organic contaminant sorption, lead phosphate precipitation, lead carbonate, activated carbon, agricultural waste valorization, sorbents
MeSH terms
Adsorption, Atrazine, Biodegradation, Environmental, Charcoal, Dairying, Environment, Kinetics, Lead, Manure, Chemical Precipitation, Regression Analysis, Temperature, X-Ray Diffraction, Spectroscopy, Fourier Transform Infrared

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