The biodegradation kinetics of BTE-oX and MTBE, mixed all together, in the presence of 905mg/L VSS of BTEX-acclimated biomass was evaluated. Effects of soil and Tergitol NP-10 in aqueous samples on substrate biodegradation rates were also evaluated. Biodegradation kinetics was evaluated for 36 hours, every 6 hours. MTBE biodegradation followed a first-order one-phase kinetic model in all samples, whereas benzene, toluene and ethylbenzene biodegradation followed a first-order two-phase kinetic model in all samples. O-xylene biodegradation followed a first-order two-phase kinetic model in the presence of biomass only. Interestingly, o-xylene biodegradation was able to switch to a first-order one-phase kinetic model when either soil or soil and Tergitol NP-10 were added. The presence of soil in aqueous samples retarded benzene, toluene and ethylbenzene removal rates. O-xylene and MTBE removal rates were enhanced by soil. The addition of Tergitol NP-10 to aqueous samples containing soil had a positive effect on substrate removal rate in all samples. Substrate percent removals ranged 77–99.8% for benzene, toluene and ethylbenzene. O-xylene and MTBE percent removals ranged 50.1–65.3% and 9.9–43.0%, respectively.
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Research Article|
October 01 2005
Effect of soil and a nonionic surfactant on BTE-oX and MTBE biodegradation kinetics
K. Acuna-Askar;
*Laboratorio de Biorremediacion Ambiental, Facultad de Medicina, UANL, Madero Pte y Dr. Aguirre, 64460 Monterrey, N.L., Mexico, (E-mail: [email protected])
E-mail: [email protected]
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M.V. Gracia-Lozano;
M.V. Gracia-Lozano
*Laboratorio de Biorremediacion Ambiental, Facultad de Medicina, UANL, Madero Pte y Dr. Aguirre, 64460 Monterrey, N.L., Mexico, (E-mail: [email protected])
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J.F. Villarreal-Chiu;
J.F. Villarreal-Chiu
*Laboratorio de Biorremediacion Ambiental, Facultad de Medicina, UANL, Madero Pte y Dr. Aguirre, 64460 Monterrey, N.L., Mexico, (E-mail: [email protected])
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J.G. Marmolejo;
J.G. Marmolejo
**Laboratorio de Micologia y Patologia Forestal, Facultad de Ciencias Forestales, UANL, Carretera Nacional Km. 145, 67700 Linares, N.L., Mexico, (E-mail: [email protected])
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M.T. Garza-Gonzalez;
M.T. Garza-Gonzalez
***Facultad de Ciencias Quimicas, UANL, Pedro de Alba s/n, Cd. Universitaria, 66400 San Nicolas de los Garza, N.L., Mexico, (E-mail: [email protected])
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B. Chavez-Gomez
B. Chavez-Gomez
****Instituto Mexicano del Petroleo, Eje Central Lazaro Cardenas 152, Delegacion Gustavo A. Madero, 07730 Mexico, (E-mail: [email protected])
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Water Sci Technol (2005) 52 (8): 107–115.
Citation
K. Acuna-Askar, M.V. Gracia-Lozano, J.F. Villarreal-Chiu, J.G. Marmolejo, M.T. Garza-Gonzalez, B. Chavez-Gomez; Effect of soil and a nonionic surfactant on BTE-oX and MTBE biodegradation kinetics. Water Sci Technol 1 October 2005; 52 (8): 107–115. doi: https://doi.org/10.2166/wst.2005.0237
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