Temperature and pH effect on lindane removal by Streptomyces sp. M7 in soil extract

C.S. BENIMELI; A.J. GONZALEZ; A.P. CHAILE; M.J. AMOROSO

JOURNAL OF BASIC MICROBIOLOGY

WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Lugar: Jena, Alemania; Año: 2007 vol. 47 p. 468 - 473

0233-111X

This work was conduced to study the removal of g-hexachlorocyclohexane (lindane) in a soil extract liquid medium (SE) by Streptomyces M7 and to determine the influence of pH and temperature on bacterial growth and pesticide removal in this medium. When Streptomyces M7 was cultured in SE supplemented with lindane 100 mg 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 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 optimum temperature for Streptomyces M7 growth, with and without lindane, was 25 C, the optimal temperature 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 polluted sites and water contaminated with lindane.