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Liu, S.M. et al.

Liu, Lin, Chi,

The effects of benzoate, cyclohex-1-ene carboxylate, and cyclohexane carboxylate on biotransformation of o-phthalate in sediment slurries under sulfate-reducing conditions.

It was found in this study that while addition of the predicted intermediate product benzoate did not, addition of cyclohex-1-ene or cyclohexane carboxylate did inhibit the biotransformation of o-phthalate in sulfate-reducing o-phthalate-adapted sediment slurries under a CO2/H2 atmosphere. Biotransformation rates of benzoate were slightly higher than those of o-phthalate in sediment slurries amended with o-phthalate plus benzoate. By using the most probable number ( MPN) method to determine the number of o-phthalate transformers, similar growth dynamics of o-phthalate transformers were observed in sediment slurries amended with or without benzoate. The number of benzoate transformers (1x10(9)cellsg-1 of sediment) remained the same in sediment slurries repeatedly amended with a mixture of o-phthalate and benzoate after their transformation. o-Phthalate transformers decreased about three orders (1x10(9) to 1x10(6)cellsg-1 of sediment) of magnitude after biotransformation of o-phthalate, and remained at the low number thereafter until re-amendment with o-phthalate. o-Phthalate transformers increased to 1x10(8)cellsg-1 of sediment just prior to the onset of biotransformation of the o-phthalate.[1]

References

The effects of benzoate, cyclohex-1-ene carboxylate, and cyclohexane carboxylate on biotransformation of o-phthalate in sediment slurries under sulfate-reducing conditions. Liu, S.M., Lin, Y.L., Chi, W.C. Chemosphere (2005) [Pubmed]

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