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Temperature and pH effect on lindane removal by Streptomyces sp. M7 in soil extract
Author(s) -
Benimeli C. S.,
González A. J.,
Chaile A. P.,
Amoroso M. J.
Publication year - 2007
Publication title -
journal of basic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0233-111X
DOI - 10.1002/jobm.200700242
Subject(s) - lindane , streptomyces , pesticide , incubation , microorganism , chemistry , hexachlorocyclohexane , environmental remediation , bacteria , food science , environmental chemistry , microbiology and biotechnology , biology , contamination , agronomy , biochemistry , ecology , genetics
This work was conduced to study the removal of γ‐hexachlorocyclohexane (lindane) in a soil extract liquid medium (SE) by Streptomyces sp. M7 and to determine the influence of pH and temperature on bacterial growth and pesticide removal in this medium. When Streptomyces sp. M7 was cultured in SE supplemented with lindane 100 μg l –1 at different initial pH, the maximum growth was observed at pH 7 and the microorganism was not able to grow at pH 5 and 9; the highest pesticide removal (70.4%) by Streptomyces sp. M7 was noted at an initial pH of 7 at 4 weeks of incubation. The maximum removal (70% approximately) was observed when the microorganism was incubated in SE at 30 °C; although the optimal temperature for Streptomyces sp. M7 growth, with and without lindane, was 25 °C, and for the pesticide removal was 30 °C. The results of this study suggest that this actinomycete strain appears as an effective alternative in the remediation of lindane polluted sites. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)