Biodegradation of dimethylsilanediol in soils.

Applied and Environmental Microbiology
C L SabourinJ L Spivack

Abstract

The biodegradation potential of [14C]dimethylsilanediol, the monomer unit of polydimethylsiloxane, in soils was investigated. Dimethylsilanediol was found to be biodegraded in all of the tested soils, as monitored by the production of 14CO2. When 2-propanol was added to the soil as a carbon source in addition to [14C]dimethylsilanediol, the production of 14CO2 increased. A method for the selection of primary substrates that support cometabolic degradation of a target compound was developed. By this method, the activity observed in the soils was successfully transferred to liquid culture. A fungus, Fusarium oxysporum Schlechtendahl, and a bacterium, an Arthrobacter species, were isolated from two different soils, and both microorganisms were able to cometabolize [14C]dimethylsilanediol to 14CO2 in liquid culture. In addition, the Arthrobacter sp. that was isolated grew on dimethylsulfone, and we believe that this is the first reported instance of a microorganism using dimethylsulfone as its primary carbon source. Previous evidence has shown that polydimethylsiloxane is hydrolyzed in soil to the monomer, dimethylsilanediol. Now, biodegradation of dimethylsilanediol in soil has been demonstrated.

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Citations

Nov 11, 2015·Biometals : an International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine·Daniel A DiasOliver A H Jones
May 1, 1999·Applied and Environmental Microbiology·R GrümpingR Hensel
Sep 7, 2018·Environmental Science and Pollution Research International·Maocai ShenGuangming Zeng
Jun 18, 1998·Journal of Inorganic Biochemistry·C Stevens
Jul 9, 2021·ACS Central Science·Nicholas S SaraiFrances H Arnold
Dec 17, 2008·Environmental Science & Technology·Sudeep C Popat, Marc A Deshusses
Dec 17, 2014·Chemical Reviews·Christoph Rücker, Klaus Kümmerer
Jan 27, 2015·ACS Applied Materials & Interfaces·Luca CeseracciuIlker S Bayer

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