Microbial Factors Rather Than Bioavailability Limit the Rate and Extent of PAH Biodegradation in Aged Crude Oil Contaminated Model Soils

Phytoremediation of Alkylated Polycyclic Aromatic Hydrocarbons in a Crude Oil-Contaminated Soil

“…Sufficient substrates in the phenanthrenes-anthracenes group may have delayed the degradation of larger, more complex molecules, as microbes maximize their C metabolism efficiency by preferentially using less resistant compounds (Carmichael and Pfaender, 1997). Reduction of biodegradable 2-and 3-ring PAH compounds could also reduce the potential for co-metabolism of the recalcitrant 4-ring PAHs (Huesemann et al, 2002). The two-and three-ring compounds were degraded to very low levels suggesting bioavailability was not a limiting factor for biodegradation.…”

Bioremediation of the Diesel-Contaminated Soil of the Brazilian Antarctic Station

“…e recalcitrance of hydrocarbons in cold soils may be due characteristics as: low temperatures (Haider, 1999), lack of nal electron acceptors (especially oxygen) (Johnsen et al, 2005), low nutrient concentrations or availability (especially N and P) (Aislabie et al, 2006), or the absence of microorganisms capable of using hydrocarbons as C source (Johnsen et al, 2005;Huesemann et al, 2002). Two of the …”

Biorremediação de solos contaminados com hidrocarbonetos aromáticos policíclicos

“…A baixa taxa de degradação de um contaminante no solo pode ser resultado do número reduzido ou inexistente de microrganismos com habilidade de degradação do composto (HUESEMANN et al, 2002). Isto é particularmente importante quando o solo recebe um xenobiótico e não há populações microbianas capazes de degradar eficientemente este composto.…”