Soil Enzyme Activities in Waste Biochar Amended Multi-Metal Contaminated Soil; Effect of Different Pyrolysis Temperatures and Application Rates
- Authors
- Vithanage, Meththika; Bandara, Tharanga; Al-Wabel, Mohammad I.; Abduljabbar, Adel; Usman, Adel R. A.; Ahmad, Mahtab; Ok, Yong Sik
- Issue Date
- 2018
- Publisher
- TAYLOR & FRANCIS INC
- Keywords
- Catalase; phytotoxicity; polyphenol oxidase; soil amendment
- Citation
- COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS, v.49, no.5, pp.635 - 643
- Indexed
- SCIE
SCOPUS
- Journal Title
- COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS
- Volume
- 49
- Number
- 5
- Start Page
- 635
- End Page
- 643
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/81021
- DOI
- 10.1080/00103624.2018.1435795
- ISSN
- 0010-3624
- Abstract
- Woody biochars derived by pyrolyzing Gliricidia sepium at 300 degrees C and 500 degrees C and a waste byproduct of same biomass from a bioenergy industry (BC700) were tested for their effect on soil enzymes activities and available form of heavy metals in multi-metals contaminated soil. Pot experiments were conducted during 6 weeks with tomato (Lycopersicon esculentum L.) at biochar application rates, 1, 2.5, and 5% (w/w). A reduction in polyphenol oxidase with biochars produced at increasing pyrolysis temperature compared to the control whereas the maximum activity of dehydrogenase and catalase was observed in 1% BC500 and 2.5% BC300, respectively. Soil available form of Ni, Mn, and Cr were reduced by 55, 70% and 80% in 5% BC700 amended soil, respectively. The highest geometric mean of enzyme activities was observed in 2.5% BC300 treatment. Overall the application of high dosages of high temperature derived biochar masks/deteriorates soil enzyme activities but immobilizes bioavailable heavy metals and reduces toxicity.
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Collections - College of Life Sciences and Biotechnology > Division of Environmental Science and Ecological Engineering > 1. Journal Articles
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