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Effect of nonionic surfactants on naphthalene dissolution and biodegradation
Author(s) -
Mulder Hendrikus,
Wassink Gerben R.,
Breure Anton M.,
van Andel Johan G.,
Rulkens Wim H.
Publication year - 1998
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/(sici)1097-0290(19981120)60:4<397::aid-bit1>3.0.co;2-h
Subject(s) - biodegradation , dissolution , naphthalene , chemistry , environmental chemistry , organic chemistry
The effect of six nonionic surfactants, Igepal CA‐720, Tergitol NPX, Triton X‐100, PLE4, PLE10, and PLE23, on the dissolution rate of solid naphthalene was studied in stirred batch reactors. Results showed increased mass‐transfer rates with increased surfactant concentrations up to 10 kg m −3 . Dissolution experiments were adequatly described by a mechanistic mass‐transfer model. Partitioning of naphthalene into the micelles and the diffusion coefficients of the micelles affected the dissolution rate most significantly. Combined dissolution and biodegradation experiments with Triton X‐100 or PLE10 with naphthalene showed that the biomass‐formation rate of Pseudomonas 8909N (DSM No. 11634) increased concomitantly with the mass‐transfer rate under naphthalene‐dissolution limited conditions up to surfactant concentrations of 6 kg m −3 . © 1998 John Wiley & Sons, Inc. Biotechnol Bioeng 60: 397–407, 1998.