Influence of Aged Biochar Modified by Cd2+ on Soil Properties and Microbial Community
1
Guangdong Industrial Contaminated Site Remediation Technology and Equipment Engineering Research Center, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
2
Department of Ecology, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
3
Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
4
Department of Agricultural Chemistry, National Taiwan University, Taipei 10617, Taiwan
*
Author to whom correspondence should be addressed.
Sustainability 2020, 12(12), 4868; https://doi.org/10.3390/su12124868
Received: 13 May 2020
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Revised: 9 June 2020
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Accepted: 10 June 2020
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Published: 15 June 2020
(This article belongs to the Section Environmental Sustainability and Applications)
Biochar is a promising addition for cadmium-contaminated soil in-situ remediation, but its surface properties change after aging, cadmium adsorption is not well-documented, and subsequent environmental effects are still unknown. In this study, wood-derived (Eucalyptus saligna Sm.) biochar was pre-treated to simulate aging and the cadmium sorption process. We then analyzed the resulting physicochemical characteristics. We conducted comparative incubation studies on three age stages of biochar under cadmium adsorption or no cadmium adsorption and then measured soil properties and microbial communities after incubation. Biochar addition raised soil organic carbon (SOC), and aging significantly increased C/N ratios. Aged biochar promoted higher microbial abundance. Aged biochar treatments possessed different microflora with more gram-positive bacteria, significantly altering gram-positive/gram-negative bacteria ratios. Aging significantly increased the oxygen-containing functional groups (OCFGs) and surface area (SA) of biochar. Thus, aged biochar adsorbed more cadmium. Cadmium-binding biochar increased the proportion of gram-negative bacteria and decreased the proportions of gram-positive bacteria and fungi. Similar patterns in phospholipid fatty acids (PLFAs) across adsorption treatments indicated that changes in microbial communities due to the effects of cadmium were confined. The results reveal that biochar aging altered microbial community structure and function more than cadmium binding.
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Keywords:
biochar aging; cadmium adsorption; soil property; microbial community
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MDPI and ACS Style
Li, K.; Yin, G.; Xu, Q.; Yan, J.; Hseu, Z.-Y.; Zhu, L.; Lin, Q. Influence of Aged Biochar Modified by Cd2+ on Soil Properties and Microbial Community. Sustainability 2020, 12, 4868. https://doi.org/10.3390/su12124868
AMA Style
Li K, Yin G, Xu Q, Yan J, Hseu Z-Y, Zhu L, Lin Q. Influence of Aged Biochar Modified by Cd2+ on Soil Properties and Microbial Community. Sustainability. 2020; 12(12):4868. https://doi.org/10.3390/su12124868
Chicago/Turabian StyleLi, Kun, Guangcai Yin, Qiuyuan Xu, Junhua Yan, Zeng-Yei Hseu, Liwei Zhu, and Qintie Lin. 2020. "Influence of Aged Biochar Modified by Cd2+ on Soil Properties and Microbial Community" Sustainability 12, no. 12: 4868. https://doi.org/10.3390/su12124868
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