Volatilization and sorption of dimethylsilanediol in soil

Abstract

Abstract-Our previous studies showed that dimethylsilanediol (DMSD) was the main hydrolysis product of silicone (polydimethylsiloxane) polymer in soil. In the present study, volatilization of 14 C-DMSD from soil (1 mg kg Ϫ1 ) was investigated in open tubes, with weekly remoistening. Losses of 14 C from Londo sandy clay loam and Pipestone sand were about 3.6 and 7.7% wk Ϫ1 , respectively, and were attributed mostly to volatilization. For select samples, DMSD was trapped and identified as the volatilized compound. From 12 soils of variable properties, losses ranged from 1.4 to 6.4% wk Ϫ1

Mineralization of dimethylsilanediol by microorganisms isolated from soil

“…This gives an estimated K d for DMSD of 0.2 L/kg. Similarly, a previous estimate of the K d of DMSD (on a different soil) was reported as 0.1 L/kg [14].…”

Fate and Effects of Silicone Polymer During the Composting Process

“…Dimethylsilanediol, (CH,),Si(OH), = DMSD, the primary hydrolysis product of PDMS, has been shown to biodegrade (Lehmann et al 1994b;Sabourin et al 1996; Lehmann et ai. 1998), and to volatilize (Lehmann and Miller 1996) readily from the soil. These processes led to a loss of silicone from sludge amended soils in both greenhouse and field (Fendinger et nl.…”

A Student Team in a University of Michigan Biomedical Engineering Design Course Constructs a Microfluidic Bioreactor for Studies of Zebrafish Development

“…This PDMS device, which will be described more fully in a detailed techniques paper (Shen et al ., unpublished observations) and which is relatively nontoxic to the environment even in its breakdown products,47 immobilizes an embryo in a funnel within a membrane, separating fish water that contains growth factors in an underlying microchannel from fish water surrounding the rest of the embryo in a microfluidic chip in a Petri dish where oxygenation and temperature can also be controlled.…”