Biochar reduces the bioavailability and phytotoxicity of heavy metals

Park, Jin Hee, Choppala, Girish Kumar, Bolan, Nanthi Sirangie, Chung, Jae Woo and Chuasavathi, Thammared (2011) Biochar reduces the bioavailability and phytotoxicity of heavy metals. Plant and Soil, 348 1-2: 439-451. doi:10.1007/s11104-011-0948-y

Author Park, Jin Hee
Choppala, Girish Kumar
Bolan, Nanthi Sirangie
Chung, Jae Woo
Chuasavathi, Thammared
Title Biochar reduces the bioavailability and phytotoxicity of heavy metals
Journal name Plant and Soil   Check publisher's open access policy
ISSN 0032-079X
Publication date 2011-11
Sub-type Article (original research)
DOI 10.1007/s11104-011-0948-y
Volume 348
Issue 1-2
Start page 439
End page 451
Total pages 13
Place of publication Springer Netherlands
Publisher Dordrecht, Netherlands
Collection year 2012
Language eng
Formatted abstract
Background and aims
Biochar has attracted research interest due to its ability to increase the soil carbon pool and improve crop productivity. The objective of this study was to evaluate the metal immobilizing impact of chicken manure- and green waste-derived biochars, and their effectiveness in promoting plant growth.

The immobilization and phytoavailability of Cd, Cu and Pb was examined using naturally contaminated shooting range and spiked soils. Biochar samples prepared from chicken manure and green waste were used as soil amendments.

Application of biochar significantly reduced NH4NO3 extractable Cd, Cu and Pb concentrations of soils, indicating the immobilization of these metals. Chicken manure-derived biochar increased plant dry biomass by 353 and 572% for shoot and root, respectively with 1% of biochar addition. This might be attributed to reduced toxicity of metals and increased availability of nutrients such as P and K. Both biochars significantly reduced Cd, Cu and Pb accumulation by Indian mustard (Brassica juncea), and the reduction increased with increasing amount of biochar application except Cu concentration. Metal sequential fractionation data indicated that biochar treatments substantially modified the partitioning of Cd, Cu and Pb from the easily exchangeable phase to less bioavailable organic bound fraction.

The results clearly showed that biochar application was effective in metal immobilization, thereby reducing the bioavailability and phytotoxicity of heavy metals.
Keyword Chicken manure-derived biochar
Green waste-derived biochar
Heavy metal
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Centre for Mined Land Rehabilitation Publications
Official 2012 Collection
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Citation counts: TR Web of Science Citation Count  Cited 135 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 170 times in Scopus Article | Citations
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