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박진희 (Jin Hee Park)
University of South Australia, University Boulevard, University of Queensland
조회 439  인쇄하기 주소복사 트위터 공유 페이스북 공유 
Biochar reduces the bioavailability and phytotoxicity of heavy metals
Jin Hee Park1 2 3, Girish Kumar Choppala1 2, Nanthi Sirangie Bolan1 2,*, Jae Woo Chung4, Thammared Chuasavathi1 2

1 Centre for Environmental Risk Assessment and Remediation, Building X, University of South Australia, University Boulevard, Mawson Lakes, SA, 5095, Australia  
2 Cooperative Research Centre for Contamination Assessment and Remediation of the Environment, Adelaide, SA, 5095, Australia  
3 Centre for Mined Land Rehabilitation, University of Queensland, St Lucia, QLD, 4072, Australia  
4 Department of Environmental Engineering, Gyeongnam National University of Science and Technology, Dongjin-ro 33, Jinju, Gyeongnam, 660-758, Republic of Korea 

*Corresponding author

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.

Methods
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.

Results
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.

Conclusions
The results clearly showed that biochar application was effective in metal immobilization, thereby reducing the bioavailability and phytotoxicity of heavy metals.

Keywords : Chicken manure-derived biochar, Green waste-derived biochar, Heavy metal, Immobilization, Bioavailability 
논문정보
- 형식: Research article
- 게재일: 2011년 11월 (BRIC 등록일 2016-03-23)
- 연구진: 국외연구진
- 분야: Plant Science, Physiology, Ecology
- 피인용횟수: 120회 이상 인용된 논문
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Springer Nature
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