Thermal stability of biochar and its effects on cadmium sorption capacity

Fangjie Qi, Yubo Yan, Dane Lamb, Ravi Naidu, Nanthi S. Bolan, Yanju Liu, Yong Sik Ok, Scott W. Donne, Kirk T. Semple

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

In this study, the thermal stability of a wood shaving biochar (WS, 650 °C), a chicken litter biochar (CL, 550 °C) and an activated carbon (AC, 1100 °C) were evaluated by combustion at 375 °C for 24 h to remove the labile non-carbonized organic matter. Results showed that WS and CL biochars were not thermally stable and can lose most of the organic C during combustion. The combusted WS and CL biochars retained considerable amounts of negative charge and displayed higher sorption for Cd (from 5.46 to 68.9 mg/g for WS and from 48.5 to 60.9 mg/g for CL). The AC retained 76.5% of its original C and became more negatively chargely after combustion, but its sorption for Cd slightly decreased (from 18.5 to 14.9 mg/g). This study indicated that after potential burning in wildfires (200–500 °C), biochars could have higher sorption capacity for metals by remaining minerals.

Original languageEnglish
Pages (from-to)48-56
Number of pages9
JournalBioresource Technology
Volume246
DOIs
Publication statusPublished - 2017 Dec 1

Fingerprint

Cadmium
Sorption
Thermodynamic stability
cadmium
sorption
combustion
wildfire
activated carbon
litter
Activated carbon
Biological materials
organic matter
Wood
Minerals
metal
mineral
Metals
effect
biochar

Keywords

  • Biochar
  • Cadmium
  • Composition
  • Sorption
  • Stability

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

Cite this

Qi, F., Yan, Y., Lamb, D., Naidu, R., Bolan, N. S., Liu, Y., ... Semple, K. T. (2017). Thermal stability of biochar and its effects on cadmium sorption capacity. Bioresource Technology, 246, 48-56. https://doi.org/10.1016/j.biortech.2017.07.033

Thermal stability of biochar and its effects on cadmium sorption capacity. / Qi, Fangjie; Yan, Yubo; Lamb, Dane; Naidu, Ravi; Bolan, Nanthi S.; Liu, Yanju; Ok, Yong Sik; Donne, Scott W.; Semple, Kirk T.

In: Bioresource Technology, Vol. 246, 01.12.2017, p. 48-56.

Research output: Contribution to journalArticle

Qi, F, Yan, Y, Lamb, D, Naidu, R, Bolan, NS, Liu, Y, Ok, YS, Donne, SW & Semple, KT 2017, 'Thermal stability of biochar and its effects on cadmium sorption capacity', Bioresource Technology, vol. 246, pp. 48-56. https://doi.org/10.1016/j.biortech.2017.07.033
Qi, Fangjie ; Yan, Yubo ; Lamb, Dane ; Naidu, Ravi ; Bolan, Nanthi S. ; Liu, Yanju ; Ok, Yong Sik ; Donne, Scott W. ; Semple, Kirk T. / Thermal stability of biochar and its effects on cadmium sorption capacity. In: Bioresource Technology. 2017 ; Vol. 246. pp. 48-56.
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