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Environmental fate & pathways

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The adsorption of 14C-2,6-DTBP (which is structurally similar to 2,4-DTBP) was tested in batch equilibrium studies using three sediment types (EPA-5, EPA-8, and EPA15). 14C-2,6-DTBP was shown to be stable during the 112 hour equilibration period, as determined by high performance liquid chromatographic (HPLC) analysis of the adsorption supernatant from a test replicate. The results indicated that the adsorption characteristics were similar among the three sediment types tested. The adsorption constants based upon the organic carbon content ranged from 2570 to 6960. There was little apparent correlation of adsorption constant with sediment texture, organic matter, cation exchange capacity or pH.

Using the Mackay Fugacity Based Environmental Equilibrium Partitioning Model Level III v 2.70, 2,4-di-tert-butylphenol can be expected to distributed as follows in the environment: -

  • Fraction of emission directed to air = 0.00696%
  • Fraction of emission directed to water = 2.48%
  • Fraction of emission directed to soil = 72.1%
  • Fraction of emission directed to sediment = 25.4%