Research Watch: PCB biodegradation

1998 ◽  
Vol 32 (17) ◽  
pp. 424A-424A
Keyword(s):  
Pcb Biodegradation

In Situ Anaerobic PCB Dechlorination and Aerobic PCB Biodegradation in Hudson River Sediments

2020 ◽  
pp. 27-43
Author(s):  
Daniel A. Abramowicz ◽  
John F. Brown ◽  
Mark R. Harkness ◽  
Michael K. O’Donnell
Keyword(s):  
River Sediments ◽  
Hudson River ◽  
Pcb Dechlorination ◽  
Pcb Biodegradation

Bacterial PCB biodegradation

1992 ◽  
pp. 161-174
Author(s):  
Alfred W. Boyle ◽  
Christopher J. Silvin ◽  
John P. Hassett ◽  
James P. Nakas ◽  
S. W. Tanenbaum
Keyword(s):  
Pcb Biodegradation

scholarly journals Degradation of Aroclor 1242 Dechlorination Products in Sediments by Burkholderia xenovorans LB400(ohb) and Rhodococcus sp. Strain RHA1(fcb)

2006 ◽  
Vol 72 (4) ◽  
pp. 2476-2482 ◽  
Author(s):  
Jorge L. M. Rodrigues ◽  
C. Alan Kachel ◽  
Michael R. Aiello ◽  
John F. Quensen ◽  
Olga V. Maltseva ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Polychlorinated Biphenyl ◽  
Contaminated Sediment ◽  
Burkholderia Xenovorans ◽  
Burkholderia Xenovorans Lb400 ◽  
Aroclor 1242 ◽  
Selective Plating ◽  
Cell Densities ◽  
Pcb Biodegradation ◽  
Rhodococcus Sp

ABSTRACT Burkholderia xenovorans strain LB400, which possesses the biphenyl pathway, was engineered to contain the oxygenolytic ortho dehalogenation (ohb) operon, allowing it to grow on 2-chlorobenzoate and to completely mineralize 2-chlorobiphenyl. A two-stage anaerobic/aerobic biotreatment process for Aroclor 1242-contaminated sediment was simulated, and the degradation activities and genetic stabilities of LB400(ohb) and the previously constructed strain RHA1(fcb), capable of growth on 4-chlorobenzoate, were monitored during the aerobic phase. The population dynamics of both strains were also followed by selective plating and real-time PCR, with comparable results; populations of both recombinants increased in the contaminated sediment. Inoculation at different cell densities (104 or 106 cells g−1 sediment) did not affect the extent of polychlorinated biphenyl (PCB) biodegradation. After 30 days, PCB removal rates for high and low inoculation densities were 57% and 54%, respectively, during the aerobic phase.

Biodegradation, an Environmental Solution to Some Toxic Organic Compounds

1976 ◽  
Vol 3 (2) ◽  
pp. 137-138
Author(s):  
Dickson L. S. Liu
Keyword(s):  
Multidisciplinary Approach ◽  
Environmental Science ◽  
Waste Treatment ◽  
Primary Site ◽  
Industrial Wastes ◽  
Stable Emulsion ◽  
Toxic Compounds ◽  
Treatment Processes ◽  
Fundamental Research ◽  
Pcb Biodegradation

The failure of conventional waste-treatment methods to solve problems associated with complex industrial wastes, suggests that we must re-examine our approach to this problem. Two distinct types of biodegradation, homogeneous and heterogeneous, have been recognized to occur in the environment and are distinguished according to the solubility or insolubility, respectively, of the compound involved. Unfortunately, many of the most persistent toxic compounds fall into the second or insoluble category, and conventional treatment processes are inefficient in dealing with them.Our studies have shown that the primary site of the biodegradation of these persistent compounds is at the substance–water interface and that the rate of such biodegradation can be greatly increased if the tested compound can be suspended in an aqueous phase as a fine stable emulsion. Our recent work on PCB biodegradation exemplifies the benefit of a multidisciplinary approach in solving environmental problems, and supports the need to continue fundamental research in such areas of applied environmental science.

PCB BIODEGRADATION IN AGED CONTAMINATED SOIL: INTERACTIONS BETWEEN EXOGENOUSPHANEROCHAETE CHRYSOSPORIUMAND INDIGENOUS MICROORGANISMS

2001 ◽  
Vol 36 (7) ◽  
pp. 1145-1162 ◽  
Author(s):  
J. M. Fernández-Sánchez ◽  
R. Rodríguez-Vázquez ◽  
G. Ruiz-Aguilar ◽  
P. J. J. Alvarez
Keyword(s):  
Contaminated Soil ◽  
Indigenous Microorganisms ◽  
Pcb Biodegradation

In Situ Anaerobic PCB Dechlorination and Aerobic PCB Biodegradation in Hudson River Sediments

2020 ◽  
pp. 27-43
Author(s):  
Daniel A. Abramowicz ◽  
John F. Brown ◽  
Mark R. Harkness ◽  
Michael K. O’Donnell
Keyword(s):  
River Sediments ◽  
Hudson River ◽  
Pcb Dechlorination ◽  
Pcb Biodegradation

Genetics and Biochemistry of Biphenyl and PCB Biodegradation

2019 ◽  
pp. 595-622 ◽  
Author(s):  
Loreine Agulló ◽  
Dietmar H. Pieper ◽  
Michael Seeger
Keyword(s):  
Pcb Biodegradation

scholarly journals Potentiality of Native Ascomycete Strains in Bioremediation of Highly Polychlorinated Biphenyl Contaminated Soils

2021 ◽  
Vol 9 (3) ◽  
pp. 612
Author(s):  
Joaquim Germain ◽  
Muriel Raveton ◽  
Marie-Noëlle Binet ◽  
Bello Mouhamadou
Keyword(s):  
Polychlorinated Biphenyls ◽  
Enzymatic Activity ◽  
Organic Pollutants ◽  
Contaminated Soils ◽  
Fungal Biomass ◽  
Polychlorinated Biphenyl ◽  
Gas Analysis ◽  
Polluted Soils ◽  
Mesocosm Experiments ◽  
Pcb Biodegradation

Polychlorinated biphenyls (PCBs) are organic pollutants that are harmful to environment and toxic to humans. Numerous studies, based on basidiomycete strains, have reported unsatisfactory results in the mycoremediation of PCB-contaminated soils mainly due to the non-telluric origin of these strains. The abilities of a five-Ascomycete-strain consortium in the mycoremediation of PCB-polluted soils and its performance to restore their sound functioning were investigated using mesocosm experiments associated with chromatography gas analysis and enzymatic activity assays. With the soil H containing 850 ppm PCB from which the strains had been isolated, a significant PCB depletion of 29% after three months of treatment was obtained. This led to an important decrease of PCBs from 850 to 604 ppm. With the soil L containing 36 ppm PCB, biodegradation did not occur. In both soils, the fungal biomass quantified by the ergosterol assay, did not increase at the end of the treatment. Biodegradation evidenced in the soil H resulted in a significantly improved stoichiometry of N and P acquiring enzymatic activities. This unprecedented study demonstrates that the native Ascomycetes display remarkable properties for remediation and restoration of functioning of the soil they originated from paving the way for greater consideration of these strains in mycoremediation.

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