TY - JOUR
T1 - Effects of pyrene and fluoranthene on the degradation characteristics of phenanthrene in the cometabolism process by Sphingomonas sp. strain PheB4 isolated from mangrove sediments
AU - Zhong, Yin
AU - Zou, Shichun
AU - Lin, Li
AU - Luan, Tiangang
AU - Qiu, Rongliang
AU - Tam, Nora F.Y.
N1 - Funding Information:
We thank Y.S. Wong, Lilian Vrijmoed, Paul Shin, and S.G. Cheung for their advice and assistance. The financial support from National Natural Science Foundation of China (NSFC, Nos. 20977116 and U0633002 ), Natural Scientific Foundation of Guangdong Province (No. 9451064004002394 ), Guangdong Provincial Key Laboratory Environmental Pollution Control and Remediation Technology (No. 2006K0010 ), and from the Research Grants Council of the Hong Kong Special Administrative Region (Project Nos. CityU 1406/06M and 9041170 ) are gratefully acknowledged. The Administrative Bureau of Guangdong Neilingding Futian National Nature Reserve is also acknowledged.
PY - 2010/11
Y1 - 2010/11
N2 - Cometabolism has been suggested as an attractive approach to enhance the degradation rates of high-molecular-weight polycyclic aromatic hydrocarbons (PAHs). However, the effects of these recalcitrant PAHs on the degradation characteristics of low-molecular-weight PAHs are largely unknown. This study was conducted to investigate the effects of pyrene (PYR) and fluoranthene (FLA) on the degradation characteristics of phenanthrene (PHE) in the cometabolism process by Sphingomonas sp. strain PheB4 isolated from mangrove sediments. Based on the kinetics and characteristics of PHE metabolites, it was proposed that the transformation of hydroxylated PHE into 1-hydroxy-2-naphthoic acid was a rate-limiting step in the degradation of PHE by strain PheB4. Compared to a single addition of PYR or FLA, the presence of a mixture of PYR and FLA decreased the degradation rate of PHE to a larger extent, which was likely because it could inhibit the production of 1-hydroxy-2-naphthoic acid more effectively.
AB - Cometabolism has been suggested as an attractive approach to enhance the degradation rates of high-molecular-weight polycyclic aromatic hydrocarbons (PAHs). However, the effects of these recalcitrant PAHs on the degradation characteristics of low-molecular-weight PAHs are largely unknown. This study was conducted to investigate the effects of pyrene (PYR) and fluoranthene (FLA) on the degradation characteristics of phenanthrene (PHE) in the cometabolism process by Sphingomonas sp. strain PheB4 isolated from mangrove sediments. Based on the kinetics and characteristics of PHE metabolites, it was proposed that the transformation of hydroxylated PHE into 1-hydroxy-2-naphthoic acid was a rate-limiting step in the degradation of PHE by strain PheB4. Compared to a single addition of PYR or FLA, the presence of a mixture of PYR and FLA decreased the degradation rate of PHE to a larger extent, which was likely because it could inhibit the production of 1-hydroxy-2-naphthoic acid more effectively.
KW - 1-Hydroxy-2-naphthoic acid
KW - Biodegradation
KW - Kinetics
KW - Metabolite
KW - Phenanthrene
UR - http://www.scopus.com/inward/record.url?scp=78049288502&partnerID=8YFLogxK
U2 - 10.1016/j.marpolbul.2010.07.017
DO - 10.1016/j.marpolbul.2010.07.017
M3 - Article
C2 - 20708757
AN - SCOPUS:78049288502
SN - 0025-326X
VL - 60
SP - 2043
EP - 2049
JO - Marine Pollution Bulletin
JF - Marine Pollution Bulletin
IS - 11
ER -