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    Rights statement: This is the author’s version of a work that was accepted for publication in Bioresource Technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Bioresource Technology, 246, 2017 DOI: 10.1016/j.biortech.2017.07.033

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Thermal stability of biochar and its effects on cadmium sorption capacity

Research output: Contribution to journalJournal article

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  • Fangjie Qi
  • Yubo Yan
  • Dane Lamb
  • Ravi Naidu
  • Nanthi S Bolan
  • Yanju Liu
  • Yong Sik Ok
  • Scott W. Donne
  • Kirk T Semple
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<mark>Journal publication date</mark>12/2017
<mark>Journal</mark>Bioresource Technology
Volume246
Number of pages9
Pages (from-to)48-56
Publication statusPublished
Early online date8/07/17
Original languageEnglish

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.

Bibliographic note

This is the author’s version of a work that was accepted for publication in Bioresource Technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Bioresource Technology, 246, 2017 DOI: 10.1016/j.biortech.2017.07.033