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Enhanced Removal of BTEX, TCE, and cis-DCE Mixture using Pseudomonas sp. Immobilized in Scrap Tires
Qihong Lu1; Renata Alves de Toledo1; Fei Xie1; Junhui Li1,2; Hojae Shim1
2014
Conference Name2nd International Conference on Contaminated Land, Ecological Assessment and Remediation
Source PublicationCLEAR 2014 Proceeding
Conference DateOct 5-8th, 2014
Conference PlaceChuncheon, Korea
Abstract

Scrap tires and Pseudomonas sp. isolated from a gasoline contaminated soil were used for the enhanced removal of a mixture of BTEX (benzene, toluene, ethylbenzene, and xylenes), cis-1,2-dichloroethylene (cis-DCE), and trichloroethylene (TCE) from aqueous solutions. Adsorption of these volatile organic compounds (VOCs) onto tires was greatly affected by contact time and the maximum adsorption was reached within 1 day. The Freundlich isotherm model best fitted the experimental data, based on its relatively high values of correlation coefficients (0.886-0.990). The constant 1/n was determined by the slopes of each plot, and the obtained values for BTEX compounds (0.19-0.49) and cis-DCE / TCE (2.41 / 1.32) suggested favourable and unfavourable removals, respectively. The adsorptive capacity (Kf) was obtained from the intercepts (23.12 - 2.24 x 10-4 mg g-1) and the adsorption affinity followed the order of toluene> benzene> m,p-xylene> o-xylene> ethylbenzene> TCE> cis-DCE. The scrap tires also showed a good capacity of enhancing the bioremoval process through immobilization (attachment) of microorganisms. For the BTEX removal, up to 95% of benzene, toluene, ethylbenzene, and xylenes were removed after 5 days when 80 mg g-1 tires together with microorganisms were employed. TCE and cis-DCE were also removed 75 and 60%. Results show that the scrap tire is a good candidate to enhance the removal of such VOCs as BTEX, cis-DCE, and TCE from liquids, due to its remarkable adsorption properties as well as the capability to attach microorganisms.

KeywordAdsorption Btex Cis-dce Immobilization Scrap Tire Tce Aerobic Bioremoval
Language英語English
Document TypeConference paper
CollectionFaculty of Science and Technology
DEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING
Affiliation1.Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau SAR, China
2.College of Natural Resources and Environmental Science, South China Agricultural University, Guangzhou, China
First Author AffilicationFaculty of Science and Technology
Recommended Citation
GB/T 7714
Qihong Lu,Renata Alves de Toledo,Fei Xie,et al. Enhanced Removal of BTEX, TCE, and cis-DCE Mixture using Pseudomonas sp. Immobilized in Scrap Tires[C], 2014.
APA Qihong Lu., Renata Alves de Toledo., Fei Xie., Junhui Li., & Hojae Shim (2014). Enhanced Removal of BTEX, TCE, and cis-DCE Mixture using Pseudomonas sp. Immobilized in Scrap Tires. CLEAR 2014 Proceeding.
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