Influence of Wood Biochar on Phenanthrene Catabolism in Soils

Environments

Uchenna Ogbonnaya¹  Ayodeji Oyelami²  Justin Matthews²  Olusoji Adebisi² 

[1] EcoSystems Environmental Management Services Ltd., 8 Rasheed Alaba Williams Street, Off Admiralty Way, Lekki Peninsula, Lagos, Nigeria;Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, UK; E-Mails:

关键词: biochar;    PAHs;    catabolism;    adaptation;   

DOI  :  10.3390/environments1010060

来源: mdpi

【 摘 要 】

The impact of increasing amendments of two particle sizes of biochar (≤2 mm and 3–7 mm), applied at 0%, 0.01%, 0.1% and 1% concentrations, on the development of indigenous phenanthrene catabolism was investigated in two soils with different soil organic matter contents. Mineralisation of ¹⁴C-phenanthrene was measured after 1, 20, 60 and 100 d soil-phenanthrene-biochar aging period. The presence of biochar in the pasture soil (low OM) resulted in a decrease in the lag phase of ¹⁴C-phenanthrene mineralisation, with higher maximum rates of mineralisation following 20 d aging. Higher extents of ¹⁴C-phenanthrene mineralisation were observed in the Kettering loam soil (high OM), which was more prominent with 0.01% biochar amendments (p < 0.05) at 61.2% and 64.9% in ≤2 mm and 3–7 mm biochar amended soils, respectively. This study illustrates the potential role for biochar to enhance microbial catabolic activity to degrade common petroleum contaminants. It however depends on contaminant concentration, aging period, and soil properties.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.