TY - JOUR
T1 - Bioaugmented remediation of high concentration BTEX-contaminated groundwater by permeable reactive barrier with immobilized bead
AU - Xin, Bao Ping
AU - Wu, Chih Hung
AU - Wu, Cheng Han
AU - Lin, Chi Wen
N1 - Funding Information:
The support from the National Science Council , Taiwan, ROC ( NSC 96-2221-E-224-093-MY3 ) is gratefully acknowledged. The authors wish to thank Ms. Mei-Shan Wang of our laboratory (Graduate student at National Yunlin University of Science and Technology) for data collection. Ted Knoy is also appreciated for his editorial assistance.
PY - 2013/1/5
Y1 - 2013/1/5
N2 - Ineffective biostimulation requires immediate development of new technologies for remediation of high concentration BTEX-contaminated (benzene, toluene, ethylbenzene and xylene) groundwater. In this study, bioaugmentation with Mycobacterium sp. CHXY119 and Pseudomonas sp. YATO411 immobilized bead was used to remediate BTEX-contaminated groundwater with about 100mgl-1 in total concentration. The batch test results showed that the CHXY119 and YATO411 immobilized bead completely biodegraded each BTEX compound, and the maximum biodegradation rates were 0.790mgl-1h-1 for benzene, 1.113mgl-1h-1 for toluene, 0.992mgl-1h-1 for ethylbenzene and 0.231mgl-1h-1 for p-xylene. The actual mineralization rates were 10.8% for benzene, 10.5% for toluene, 5.8% for ethylbenzene and 11.4% for p-xylene, which indicated that the bioremediation of BTEX by the immobilized bead requires a rather small oxygen supply. Degradation rates achieved by the bioaugmented permeable reactive barrier (Bio-PRB) system of the immobilized bead were 97.8% for benzene, 94.2% for toluene, 84.7% for ethylbenzene and 87.4% for p-xylene; and the toxicity of the groundwater fell by 91.2% after bioremediation by the bioaugmented PRB, which confirmed its great potential for remediating groundwater with high concentrations of contaminants.
AB - Ineffective biostimulation requires immediate development of new technologies for remediation of high concentration BTEX-contaminated (benzene, toluene, ethylbenzene and xylene) groundwater. In this study, bioaugmentation with Mycobacterium sp. CHXY119 and Pseudomonas sp. YATO411 immobilized bead was used to remediate BTEX-contaminated groundwater with about 100mgl-1 in total concentration. The batch test results showed that the CHXY119 and YATO411 immobilized bead completely biodegraded each BTEX compound, and the maximum biodegradation rates were 0.790mgl-1h-1 for benzene, 1.113mgl-1h-1 for toluene, 0.992mgl-1h-1 for ethylbenzene and 0.231mgl-1h-1 for p-xylene. The actual mineralization rates were 10.8% for benzene, 10.5% for toluene, 5.8% for ethylbenzene and 11.4% for p-xylene, which indicated that the bioremediation of BTEX by the immobilized bead requires a rather small oxygen supply. Degradation rates achieved by the bioaugmented permeable reactive barrier (Bio-PRB) system of the immobilized bead were 97.8% for benzene, 94.2% for toluene, 84.7% for ethylbenzene and 87.4% for p-xylene; and the toxicity of the groundwater fell by 91.2% after bioremediation by the bioaugmented PRB, which confirmed its great potential for remediating groundwater with high concentrations of contaminants.
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U2 - 10.1016/j.jhazmat.2012.11.007
DO - 10.1016/j.jhazmat.2012.11.007
M3 - Article
C2 - 23200621
AN - SCOPUS:84872621051
SN - 0304-3894
VL - 244-245
SP - 765
EP - 772
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
ER -