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Title: Effect of biochars pyrolyzed in N-2 and CO2, and feedstock on microbial community in metal(loid)s contaminated soils
Authors: Igalavithana, AD
Kim, KH
Jung, JM
Heo, HS
Kwon, EE
Tack, FMG
Tsang, DCW 
Jeon, YJ
Ok, YS
Keywords: Bacterial diversity
Community structure
Engineered biochar
Potentially toxic element
Issue Date: 2019
Publisher: Pergamon Press
Source: Environment international, May 2019, v. 126, p. 791-801 How to cite?
Journal: Environment international 
Abstract: Little is known about the effects of applying amendments on soil for immobilizing metal(loid)s on the soil microbial community. Alterations in the microbial community were examined after incubation of treated contaminated soils. One soil was contaminated with Pb and As, a second soil with Cd and Zn. Red pepper stalk (RPS) and biochars produced from RPS in either N-2 atmosphere (RPSN) or CO2 atmosphere (RPSC) were applied at a rate of 2.5% to the two soils and incubated for 30 days. Bacterial communities of control and treated soils were characterized by sequencing 16S rRNA genes using the Illumina MiSeq sequencing. In both soils, bacterial richness increased in the amended soils, though somewhat differently between the treatments. Evenness values decreased significantly, and the final overall diversities were reduced. The neutralization of pH, reduced available concentrations of Pb or Cd, and supplementation of available carbon and surface area could be possible factors affecting the community changes. Biochar amendments caused the soil bacterial communities to become more similar than those in the not amended soils. The bacterial community structures at the phylum and genus levels showed that amendment addition might restore the normal bacterial community of soils, and cause soil bacterial communities in contaminated soils to normalize and stabilize.
ISSN: 0160-4120
DOI: 10.1016/j.envint.2019.02.061
Rights: © 2019 Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (
The following publication Igalavithana, A. D., Kim, K. H., Jung, J. M., Heo, H. S., Kwon, E. E., Tack, F. M., ... & Ok, Y. S. (2019). Effect of biochars pyrolyzed in N2 and CO2, and feedstock on microbial community in metal (loid) s contaminated soils. Environment international, 126, 791-801 is available at
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