- Title
- Thermal stability of biochar and its effects on cadmium sorption capacity
- Creator
- Qi, Fangjie; Yan, Yubo; Lamb, Dane; Naidu, Ravi; Bolan, Nanthi S.; Liu, Yanju; Ok, Yong Sik; Donne, Scott W.; Semple, Kirk T.
- Relation
- Bioresource Technology Vol. 246, Issue December, p. 48-56
- Publisher Link
- http://dx.doi.org/10.1016/j.biortech.2017.07.033
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2017
- Description
- 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.
- Subject
- biochar; stability; composition; cadmium; sorption
- Identifier
- http://hdl.handle.net/1959.13/1395445
- Identifier
- uon:33876
- Identifier
- ISSN:0960-8524
- Rights
- © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
- Language
- eng
- Full Text
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