Assessing the potential of using biochar in mine rehabilitation under elevated atmospheric CO2 concentration

Yaling Zhang; Carl Menke; Barbara Drigo; Shahla Hosseini Bai; Ian Anderson; Zhihong Xu; Hong Chen; Manyun Zhang

doi:10.1007/s11368-017-1765-6

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Assessing the potential of using biochar in mine rehabilitation under elevated atmospheric CO2 concentration

Journal article

Peer reviewed

Assessing the potential of using biochar in mine rehabilitation under elevated atmospheric CO2 concentration

Yaling Zhang, Carl Menke, Barbara Drigo, Shahla Hosseini Bai, Ian Anderson, Zhihong Xu, Hong Chen and Manyun Zhang

Journal of Soils and Sediments, Vol.17(10), pp.2410-2419

2017

DOI: https://doi.org/10.1007/s11368-017-1765-6

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Abstract

biochar

elevated CO2

mine rehabilitation

δ13C and δ15N

C and N nutrient cycles

Purpose Re-establishment of soil nitrogen (N) capital is a priority in mine rehabilitation. We aimed to evaluate the effects of biochar addition on improving mine spoil N pools and the influence of elevated CO2 concentration on mine rehabilitation. Materials and methods We assessed the effects of pinewood biochar, produced at three temperatures (650, 750 and 850 °C, referred as B650, B750 and B850, respectively), on mine spoil total N concentrations with five different plant species, including a tree species (Eucalyptus crebra), N-fixing shrubs (Acacia floribunda and Allocasuarina littoralis) and C3 and C4 grasses (Austrodanthonia tenuior and Themeda australis) incubated at ambient (400 μL L-1 ) and elevated (700 μL L-1 ) atmospheric CO2 concentrations, as well as the effects of elevated CO2 on mine rehabilitation. Results and discussion Soil total N significantly improved following biochar incorporation under all plant species (P < 0.05) except for T. Australis. E. crebra had the highest soil total N (0.197%, 0.198% and 0.212% for B650, B750 and B850, respectively). Different from the negligible influence of elevated CO2 on soil properties under the grasses and the Nfixing shrubs, elevated CO2 significantly increased soil water and hot water extractable organic C (WEOC and HWEOC, respectively) and decreased total C under E. crebra, indicating that the nutrient demands were not met. Conclusions Biochar addition showed the potential in mine rehabilitation in terms of improving soil N pool, especially with E. crebra. However, it would be more difficulty to rehabilitate mine spoils in future with the rising atmospheric CO2 concentration.

Details

Title: Assessing the potential of using biochar in mine rehabilitation under elevated atmospheric CO2 concentration
Authors: Yaling Zhang (Author) - Griffith University
Carl Menke (Author) - Griffith University
Barbara Drigo (Author) - University of South Australia
Shahla Hosseini Bai (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Ian Anderson (Author) - University of Western Sydney
Zhihong Xu (Author) - Griffith University
Hong Chen (Author) - Chinese Academy of Sciences, China
Manyun Zhang (Author) - Griffith University
Publication details: Journal of Soils and Sediments, Vol.17(10), pp.2410-2419
Publisher: Springer
Date published: 2017
DOI: 10.1007/s11368-017-1765-6
ISSN: 1439-0108
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99450533402621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Environmental Sciences; Soil Science

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