Versatility of Streptomyces sp. M7 to bioremediate soils co-contaminated with Cr(VI) and lindane

Ecotoxicology and Environmental Safety
JuanDaniel AparicioMarta A Polti

Abstract

The aim of this work was to study the impact of environmental factors on the bioremediation of Cr(VI) and lindane contaminated soil, by an actinobacterium, Streptomyces sp. M7, in order to optimize the process. Soil samples were contaminated with 25 µg kg(-1) of lindane and 50 mg kg(-1) of Cr(VI) and inoculated with Streptomyces sp. M7. The lowest inoculum concentration which simultaneously produced highest removal of Cr(VI) and lindane was 1 g kg(-1). The influence of physical and chemical parameters was assessed using a full factorial design. The factors and levels tested were: Temperature: 25, 30, 35°C; Humidity: 10%, 20%, 30%; Initial Cr(VI) concentration: 20, 50, 80 mg kg(-1); Initial lindane concentration: 10, 25, 40 µg kg(-1). Streptomyces sp. M7 exhibited strong versatility, showing the ability to bioremediate co-contaminated soil samples at several physicochemical conditions. Streptomyces sp. M7 inoculum size was optimized. Also, it was fitted a model to study this process, and it was possible to predict the system performance, knowing the initial conditions. Moreover, optimum temperature and humidity conditions for the bioremediation of soil with different concentrations of Cr(VI) and lindane were determined. Lettuce ...Continue Reading

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Citations

Jun 26, 2017·Ecotoxicology and Environmental Safety·Amjad AliZengqiang Zhang
Sep 25, 2017·Journal of Basic Microbiology·María Z Simon SolaAnalia Alvarez
Jul 14, 2019·Environmental Science and Pollution Research International·Chao ZhangLanzhou Chen
May 3, 2019·Applied Microbiology and Biotechnology·Pedro E SineliJosé Sebastián Dávila Costa
Apr 16, 2020·Frontiers in Microbiology·Wenping ZhangShaohua Chen
Jan 26, 2021·3 Biotech·Stefanie B Costa-GutierrezMarta A Polti
Oct 16, 2021·Critical Reviews in Microbiology·José Sebastián Dávila CostaCintia Mariana Romero
Aug 18, 2020·Ecotoxicology and Environmental Safety·Marcela Alejandra SadañoskiLaura Lidia Villalba

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