Characterization of hard- and softwood biochars pyrolyzed at high temperature

Jiang, Shasha, Nguyen, Tuan A. H., Rudolph, Victor, Yang, Hong, Zhang, Dongke, Ok, Yong Sik and Huang, Longbin (2016) Characterization of hard- and softwood biochars pyrolyzed at high temperature. Environmental Geochemistry and Health, 39 2: 1-13. doi:10.1007/s10653-016-9873-6


Author Jiang, Shasha
Nguyen, Tuan A. H.
Rudolph, Victor
Yang, Hong
Zhang, Dongke
Ok, Yong Sik
Huang, Longbin
Title Characterization of hard- and softwood biochars pyrolyzed at high temperature
Journal name Environmental Geochemistry and Health   Check publisher's open access policy
ISSN 1573-2983
0269-4042
Publication date 2016-09-12
Sub-type Article (original research)
DOI 10.1007/s10653-016-9873-6
Open Access Status Not yet assessed
Volume 39
Issue 2
Start page 1
End page 13
Total pages 13
Place of publication Dordrecht, Netherlands
Publisher Springer Netherlands
Language eng
Subject 2305 Environmental Engineering
2304 Environmental Chemistry
2312 Water Science and Technology
2300 Environmental Science
1906 Geochemistry and Petrology
Abstract A wide range of waste biomass/waste wood feedstocks abundantly available at mine sites provide the opportunity to produce biochars for cost-effective improvement of mine tailings and contaminated land at metal mines. In the present study, soft- and hardwood biochars derived from pine and jarrah woods at high temperature (700 °C) were characterized for their physiochemical properties including chemical components, electrical conductivity, pH, zeta potential, cation-exchange capacity (CEC), alkalinity, BET surface area and surface morphology. Evaluating and comparing these characteristics with available data from the literature have affirmed the strong dictation of precursor type on the physiochemical properties of the biochars. The pine and jarrah wood feedstocks are mainly different in their proportions of cellulose, hemicellulose and lignin, resulting in biochars with heterogeneous physiochemical properties. The hardwood jarrah biochar exhibits much higher microporosity, alkalinity and electrostatic capacity than the softwood pine. Correlation analysis and principal component analysis also show a good correlation between CEC–BET–alkalinity, and alkalinity–ash content. These comprehensive characterization and analysis results on biochars’ properties from feedstocks of hardwood (from forest land clearance at mine construction) and waste pine wood (from mining operations) will provide a good guide for tailoring biochar functionalities for remediating metal mine tailings. The relatively inert high-temperature biochars can be stored for a long term at mine closure after decades of operations.
Keyword BET surface area
Biochar physicochemical characteristics
CEC–BET–alkalinity
Wood feedstocks
Wood-derived biochar
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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