TY - JOUR
T1 - Biosurfactant-enhanced removal of total petroleum hydrocarbons from contaminated soil
AU - Lai, Chin Chi
AU - Huang, Yi Chien
AU - Wei, Yu Hong
AU - Chang, Jo Shu
N1 - Funding Information:
This study was financially supported by the Ministry of Economic Affairs of Taiwan (Grant no. 96-EC-17-A-10-10-S1-013). The authors also gratefully acknowledge the technical assistance from Prof. Sheng-Shung Cheng's lab at Department of Environmental Engineering, National Cheng Kung University, Taiwan.
PY - 2009/8/15
Y1 - 2009/8/15
N2 - A screening method was developed to evaluate the oil removal capability of biosurfactants for oil-contaminated soils collected from a heavy oil-polluted site. The ability of removing total petroleum hydrocarbon (TPH) from soil by two biosurfactants was identified and compared with that of synthetic surfactants. The results show that biosurfactants exhibited much higher TPH removal efficiency than the synthetic ones examined. By using 0.2 mass% of rhamnolipids, surfactin, Tween 80, and Triton X-100, the TPH removal for the soil contaminated with ca. 3,000 mg TPH/kg dry soil was 23%, 14%, 6%, and 4%, respectively, while removal efficiency increased to 63%, 62%, 40%, and 35%, respectively, for the soil contaminated with ca. 9000 mg TPH/kg dry soil. The TPH removal efficiency also increased with an increase in biosurfactant concentration (from 0 to 0.2 mass%) but it did not vary significantly for the contact time of 1 and 7 days.
AB - A screening method was developed to evaluate the oil removal capability of biosurfactants for oil-contaminated soils collected from a heavy oil-polluted site. The ability of removing total petroleum hydrocarbon (TPH) from soil by two biosurfactants was identified and compared with that of synthetic surfactants. The results show that biosurfactants exhibited much higher TPH removal efficiency than the synthetic ones examined. By using 0.2 mass% of rhamnolipids, surfactin, Tween 80, and Triton X-100, the TPH removal for the soil contaminated with ca. 3,000 mg TPH/kg dry soil was 23%, 14%, 6%, and 4%, respectively, while removal efficiency increased to 63%, 62%, 40%, and 35%, respectively, for the soil contaminated with ca. 9000 mg TPH/kg dry soil. The TPH removal efficiency also increased with an increase in biosurfactant concentration (from 0 to 0.2 mass%) but it did not vary significantly for the contact time of 1 and 7 days.
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U2 - 10.1016/j.jhazmat.2009.01.017
DO - 10.1016/j.jhazmat.2009.01.017
M3 - Article
C2 - 19217712
AN - SCOPUS:66149190376
SN - 0304-3894
VL - 167
SP - 609
EP - 614
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
IS - 1-3
ER -