2,6-디-tert-부틸벤조퀴논

Based on an experimental log Kow of 4.42(1), the Koc of 2,6-di-t-butyl-p-benzoquinone is estimated as approximately 6100 using a regression-derived equation(2,SRC). According to a suggested classification scheme(3), this estimated Koc value suggests that 2,6-di-t-butyl-p-benzoquinone will be immobile in soil(SRC). Sewage which had been through secondary treatment was subjected to rapid infiltration; the concentration of 2,6-di-t-butyl-p-benzoquinone in the initial sewage was from 0.022-0.037 ug/L and ranged from barely detected to 0.005 ug/L in the groundwater below the rapid infiltration beds(4). It was believed that the loss of this compound was due to adsorption as the sewage had already been through secondary treatment(4). In an unconfined aquifer, however, 2,6-di-t-butyl-p-benzoquinone was shown to have been transported for a considerable distance(between 1940-1983, estimated 2710 m)(1,5).

VOLATILE POLLUTANTS, INCLUDING 2,6-DI-T-BUTYL-P-BENZOQUINONE, WERE PRODUCED FROM SEVERAL RUBBER GOODS MANUFACTURING PROCESSES & ANALYZED BY GAS CHROMATOGRAPHY/MASS SPECTROMETRY. THEIR CUMULATIVE CONCN RANGED FROM 25-27,000 UG/CU M.

2,6-Di-t-butyl-p-benzoquinone's production and subsequent use as an oxidant and polymerization catalyst(1), may result in its release to the environment through various waste streams(SRC). 2,6-Di-t-butyl-p-benzoquinone is also an environmental product of the oxidation of 2,6-di-t-butyl phenol, a common antioxidant additive(2,3).

2,6-Di-t-butyl-p-benzoquinone (at 0.3 ug/l) had a half-life in Rhine River water of 3.4 days; measurements were made at Lobith and 24.5 hours later at Gorinchem(1). Degradation of this compound was believed due to aerobic and anaerobic biodegradation(1); however, adsorption to suspended solids and organic matter in the water column was not measured(1,SRC). 2,6-di-t-butyl-p-benzoquinone (at 2 ug/L) initially present in Rhine River water was not detected once the water was passed through a bank filtration process(2). It was not specified whether the loss of this compound was due to biodegradation or adsorption(2,SRC).

2,6-Di-t-butyl-p-benzoquinone was present in Pawtuxet River sediment located downstream of a plant which produced antioxidants (at concentrations of 1 ppm to 80 ppm(1). 2,6-Di-t-butyl-p-benzoquinone was present in sediment (0.1-40 ppm) located downstream from a specialty chemicals manufacturing plant(2).

An estimated BCF value of 1400 was calculated for 2,6-di-t-butyl-p-benzoquinone, using a measured log Kow of 4.42(1) and a recommended regression-derived equation(2,SRC). This BCF value suggests that 2,6-di-t-butyl-p-benzoquinone will bioconcentrate in aquatic organisms(2,SRC).This compound was detected in fish in the Great Lakes(3) suggesting that bioconcentration may occur(SRC).

The Henry's Law constant for 2,6-di-t-butyl-p-benzoquinone is estimated as 1.6X10-8 atm-cu m/mole(SRC) using a fragment constant estimation method(1). This indicates that 2,6-di-t-butyl-p-benzoquinone will essentially not volatilize from water surfaces(2,SRC).