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|
SDStot
|
SDSads
|
Δ(SDSads)
|
DFOBads
|
Δ(DFOBads)
|
Δ(DFOBads)/Δ(SDSads)
|
|---|
|
(μM)
|
--------------------------- (μmol/m2) -----------------------------
| |
|---|
|
0
|
0.000
|
---
|
0.047
|
---
|
---
|
|
50
|
0.054
|
0.054
|
0.077
|
0.030
|
0.56
|
|
100
|
0.107
|
0.054
|
0.091
|
0.014
|
0.25
|
|
200
|
0.214
|
0.107
|
0.105
|
0.014
|
0.13
|
|
400
|
0.439
|
0.224
|
0.142
|
0.037
|
0.17
|
|
600
|
0.781
|
0.342
|
0.171
|
0.029
|
0.08
|
- The goethite concentration was 7 g/L and the total DFOB concentration was 80 μM.
- The SDS adsorption data were taken from [21] and were measured in the absence of DFOB. Δ(SDSads) and Δ(DFOBads) denote the additional SDS and DFOB adsorbed relative to the next lower SDStot concentration. The ratio Δ(DFOBads)/Δ(SDSads) is an estimate for the additional amount of DFOB adsorbed due to additional adsorption of SDS to the goethite surface.
