Effect of heavy metals on the biodegradation of dibenzofuran in liquid medium

Studies of action of heavy metals on caffeine degradation by immobilised <i>Leifsonia sp.</i> strain SIU

“…However, the growth of these organisms is inhibited at high concentrations of the toxic compounds which turn to be very toxic, thus limiting the effectiveness of the caffeine biodegradation. This result is in accordance with the result obtained by Hong et al, (2007) where heavy metal has a slightly inhibitory effect on dibenzofuran. These toxic compounds also exert their toxic effects by inhibiting caffeine-degrading enzymes or other metabolic enzymes needed for growth (Nies, 1999).…”

Versatility of Streptomyces sp. M7 to bioremediate soils co-contaminated with Cr(VI) and lindane

“…However, upon optimizer response, higher temperature conditions promote contaminants removal when one of them was at high initial concentration, which could be related to non-biological activity. Several studies indicate that the presence of metals in a contaminated site affects microbial population development, causing growth rate decreasing and inhibition of degradative metabolism (Lin et al, 2006;Hong et al, 2007;Moreira et al, 2013).…”

Aerobic biotransformation of decabromodiphenyl ether (PBDE-209) by Pseudomonas aeruginosa

“…Possible explanations for this result were (i) P. aeruginosa in this research was isolated from the electronic wastes surrounded area and was therefore more tolerant of heavy metal. Moreover, some heavy metals, such as Cd 2+ , when their concentrations were low, could promote the growth and activity of the bacteria (Hong et al, 2007), thus increasing the utilization rate of PBDE-209 by P. aeruginosa. (ii) Functional enzyme for the degradation of PBDE-209 was synthesized at low concentration of Cd 2+ .…”