Key factors determining biochar sorption capacity for metal contaminants: a literature synthesis
Evert Thomas , Nils Borchard , Christian Sarmiento , Rachel Atkinson , Brenton Ladd
Biochar ›› 2020, Vol. 2 ›› Issue (2) : 151 -163.
Key factors determining biochar sorption capacity for metal contaminants: a literature synthesis
| • | Sorption properties of biochar for heavy metals was assessed through a literature review using random forest and multi-objective optimization analyses |
| • | Feedstock was the most important variable determining sorption capacity and affinity, with best results obtained for nutrient-dense feedstocks (animal biowaste, sludge, and manure) |
| • | The best performing biochar had lower C and higher N and O content, as well as lower C/N and higher O/C and H/C ratios, higher pore volumes, and higher pH. |
| • | Post-pyrolysis chemical treatment of biochar increased sorption properties more effectively than washing and magnetization. |
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