TY - JOUR
T1 - Impact of solids on biphasic biodegradation of phenanthrene in the presence of hydroxypropyl-β-cyclodextrin (HPCD)
AU - Zhang, Zhenyi
AU - Inoue, Chihiro
AU - Li, Guanghe
N1 - Funding Information:
Acknowledgements This work was supported by the National Natural Science Foundation of China (Grant No. 40730738) and China Scholarship Council.
PY - 2010
Y1 - 2010
N2 - The consequence of polycyclic aromatic hydrocarbons (PAHs) in the environment is of great concern. The hydrophobic properties of PAHs significantly impact phase distribution causing limited bioavailability. Enhanced biodegradation has been extensively carried out by surfactants and the redeployment effect was recognized. However, the quantitative relationship concerning the impact of solids was rarely reported. A batch of biphasic tests were carried out by introducing Mycobacterium vanbaalenii PYR-1 and hydroxypropyl-β-cyclodextrin (HPCD) into a mixture of phenanthrene solution and various glass beads (GB37-63, GB105-125, and GB350-500). The comparative results demonstrated that HPCD had little effect on microbial growth and was not degradable by bacterium. A model was proposed to describe the biodegradation process. The regression results indicated that the partition coefficient kd (1.234, 0.726 and 0.448 L·g-1) and the degradation rate k (0 mmol·L-1: 0.055, 0.094, and 0.112; 20 mmol·L-1: 0.126, 0.141, and 0.156; 40 mmol·L-1: 0.141, 0.156 and 0.184 d-1) were positively and negatively correlated with the calculated total surface area (TSA) of solids, respectively. Degradation enhanced in the presence of HPCD, and the enhancing factor f was calculated (20 mmol·L-1: 15.16, 40.01, and 145.5; 40 mmol·L-1: 13.29, 37.97, and 138.4), indicating that the impact of solids was significant for the enhancement of biodegradation.
AB - The consequence of polycyclic aromatic hydrocarbons (PAHs) in the environment is of great concern. The hydrophobic properties of PAHs significantly impact phase distribution causing limited bioavailability. Enhanced biodegradation has been extensively carried out by surfactants and the redeployment effect was recognized. However, the quantitative relationship concerning the impact of solids was rarely reported. A batch of biphasic tests were carried out by introducing Mycobacterium vanbaalenii PYR-1 and hydroxypropyl-β-cyclodextrin (HPCD) into a mixture of phenanthrene solution and various glass beads (GB37-63, GB105-125, and GB350-500). The comparative results demonstrated that HPCD had little effect on microbial growth and was not degradable by bacterium. A model was proposed to describe the biodegradation process. The regression results indicated that the partition coefficient kd (1.234, 0.726 and 0.448 L·g-1) and the degradation rate k (0 mmol·L-1: 0.055, 0.094, and 0.112; 20 mmol·L-1: 0.126, 0.141, and 0.156; 40 mmol·L-1: 0.141, 0.156 and 0.184 d-1) were positively and negatively correlated with the calculated total surface area (TSA) of solids, respectively. Degradation enhanced in the presence of HPCD, and the enhancing factor f was calculated (20 mmol·L-1: 15.16, 40.01, and 145.5; 40 mmol·L-1: 13.29, 37.97, and 138.4), indicating that the impact of solids was significant for the enhancement of biodegradation.
KW - biphasic biodegradation
KW - hydroxypropyl-β-cyclodextrin (HPCD)
KW - polycyclic aromatic hydrocarbons (PAHs)
UR - http://www.scopus.com/inward/record.url?scp=77956482587&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77956482587&partnerID=8YFLogxK
U2 - 10.1007/s11783-010-0232-z
DO - 10.1007/s11783-010-0232-z
M3 - Article
AN - SCOPUS:77956482587
VL - 4
SP - 329
EP - 333
JO - Frontiers of Environmental Science and Engineering
JF - Frontiers of Environmental Science and Engineering
SN - 2095-2201
IS - 3
ER -