Figure 3: Twenty-four-hour average, maximum and minimum 17α-TBOH and hydroxy-17α-TBOH concentrations. | Nature Communications

Figure 3: Twenty-four-hour average, maximum and minimum 17α-TBOH and hydroxy-17α-TBOH concentrations.

From: Coupled reversion and stream-hyporheic exchange processes increase environmental persistence of trenbolone metabolites

Figure 3

Twenty-four-hour average concentrations (dashed lines) and ranges (shaded regions) for 17α-TBOH and hydroxy-17α-TBOH in the stream-hyporheic system through a typical 24-hour cycle at dynamic steady state. Vertical dashed lines indicate distances for 12 and 24 h of downstream advection in the stream channel. Labels indicate (1) advection of input concentration in-stream during period of darkness; (2) rapid photolysis of 17α-TBOH advected during night time period, decay is not exponential because the forward reaction rate is time-variable with solar loading; (3) rapid photolysis of 17α-TBOH input during daylight period; (4) 99% removal of 17α-TBOH achieved after 25.9 h; (5) equilibrium of photolysis and reversion, linear decay due to partitioning of 10% of forward reaction of 17α-TBOH to non-revertible products; and (6) hyporheic zone has only a source function downstream of 38 km.

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