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Enhanced In Situ Bioremediation of Phenol in Bioestimulated Unsaturated and Saturated Sand‐Bed Columns
Biodegradation of phenol was observed in unsaturated sand‐bed columns, in which phenol concentration declined from 298 mg phenol/kg sand to less than 1 mg/kg after 21 days. In saturated sand‐bed columns, phenol concentration declined from 230 mg phenol/kg to less than 1 mg/kg after 37 days. Pseudo‐first‐order phenol biodegradation rates were in the range 0.25 days −1 (R 2 = 0.9) to 0.66 days −1 (R 2 = 0.85) and 0.08 days −1 (R 2 = 0.68) to 0.14 days −1 (R 2 = 0.84) in the unsaturated and saturated sand‐bed columns, respectively. Unsaturated columns presented a higher biomass density (21.5 mg/g) in the sand‐bed and lower biomass concentration in the aqueous phase (3.5 NTU) compared with the saturated columns (6.4 mg/g and 14.0 NTU). A high concentration of phenol releases in the sand‐bed columns resulted in an initial inhibition of microbial activity and destabilization of the attached biomass.
Enhanced In Situ Bioremediation of Phenol in Bioestimulated Unsaturated and Saturated Sand‐Bed Columns
Biodegradation of phenol was observed in unsaturated sand‐bed columns, in which phenol concentration declined from 298 mg phenol/kg sand to less than 1 mg/kg after 21 days. In saturated sand‐bed columns, phenol concentration declined from 230 mg phenol/kg to less than 1 mg/kg after 37 days. Pseudo‐first‐order phenol biodegradation rates were in the range 0.25 days −1 (R 2 = 0.9) to 0.66 days −1 (R 2 = 0.85) and 0.08 days −1 (R 2 = 0.68) to 0.14 days −1 (R 2 = 0.84) in the unsaturated and saturated sand‐bed columns, respectively. Unsaturated columns presented a higher biomass density (21.5 mg/g) in the sand‐bed and lower biomass concentration in the aqueous phase (3.5 NTU) compared with the saturated columns (6.4 mg/g and 14.0 NTU). A high concentration of phenol releases in the sand‐bed columns resulted in an initial inhibition of microbial activity and destabilization of the attached biomass.
Enhanced In Situ Bioremediation of Phenol in Bioestimulated Unsaturated and Saturated Sand‐Bed Columns
Antizar‐Ladislao, Blanca (author) / Galil, Noah I. (author)
Water Environment Research ; 78 ; 2447-2455
2006-12-01
9 pages
Article (Journal)
Electronic Resource
English
sand , phenol , bioremediation , aquifer , bioestimulation
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