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Enhanced In Situ Bioremediation of Phenol in Bioestimulated Unsaturated and Saturated Sand‐Bed Columns
Author(s) -
AntizarLadislao Blanca,
Galil Noah I.
Publication year - 2006
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143006x115417
Subject(s) - phenol , biodegradation , bioremediation , chemistry , biomass (ecology) , environmental chemistry , contamination , organic chemistry , ecology , biology
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.