Table
1. The Kd values for the whole sand, the coatings, the naked sand,
the sonicated sand but without separation of coatings and the sand without iron
compounds. Samples 1 and 5 from Port Jefferson and samples 6 and 7 from South
Setauket.
|
Kd (ml/g) |
||||
Sample |
Whole sand |
Coatings |
Naked sand |
Sonicated sand but without
separation of coatings |
Sand without iron compound |
1 |
10.7 |
1480 |
6.98 |
18.4 |
34.9 |
5 |
31.8 |
703 |
9.02 |
39.8 |
42.8 |
6 |
3.13 |
517 |
1.55 |
7.53 |
|
7 |
2.50 |
396 |
2.03 |
9.28 |
|
Table 2. Fraction of the coatings to the whole
coated sand mass. Medium-coarse coated sand from Port Jefferson (samples 1 and
5) and coarse sand from South Setauket (samples 6 and 7).
sample |
fraction of coatings |
1 |
0.027 |
5 |
0.065 |
6 |
0.008 |
7 |
0.009 |
Table
3. The estimation of the contribution of the naked sand (f naked sand
* Kd naked sand) and the coatings (f coatings
* Kd coatings) to the sorption of the whole sand from Port Jefferson
(samples 1 and 5) and South Setauket (samples 6 and 7).
sample |
Naked sand Kd (ml/g) |
Coatings Kd (ml/g) |
Total (naked
sand+coatings) Kd (ml/g) |
1 |
6.80 |
39.5 |
46.3 |
5 |
8.43 |
45.9 |
54.3 |
6 |
1.53 |
4.1 |
5.63 |
7 |
2.01 |
3.69 |
5.70 |
Table 4. Fraction of organic carbon (TOC) measured
on the whole sand, the coatings and the naked sand and estimated for the
coatings. Coated medium-coarse sand from Port Jefferson (samples 1 and 5) and
coated coarse sand from South Setauket
(samples 6 and 7).
|
Fraction of organic carbon
(foc) |
|||
Sample |
Whole sand |
Coatings |
Estimated for the coatings (equation 9) |
Calculated for the naked sand (foc(whole
sand)-foc(estimated coatings)) |
1 |
0.00027 |
0.0076 |
0.00021 |
0.00006 |
5 |
0.00025 |
0.0021 |
0.00014 |
0.00011 |
6 |
0.00020 |
0.0045 |
3.56*10-5 |
0.00016 |
7 |
0.00024 |
0.0028 |
2.6*10-5 |
0.00021 |
Table 5. Surface area measured on the whole sand,
the coatings and the surface area contribution that coatings make to the whole
coated sand form Port Jefferson (samples 1 and 5) and South Setauket (samples 6
and 7).
|
Surface area (m2/g) |
||
Sample |
Whole sand |
Coatings |
S.A. estimated whole
sand = S.A. coatings * f coatings |
1 |
2.54 |
|
|
5 |
3.20 |
|
|
6 |
1.47 |
18.8 |
0.15 |
7 |
1.03 |
|
|
Table
6. The comparison among the log Koc whole sand, log Koc
coatings, log Koc naked sand and predicted log Koc.
Samples 1 and 5 (Port Jefferson) and 6 and 7 (South Setauket).
Samples |
log Koc Whole sand |
log Koc coatings |
log Koc Naked sand |
log Koc Predicted (equation 6) low prediction |
log Koc Predicted (equation 4) intermediate prediction |
log Koc Predicted (equation 5) high prediction |
1 |
4.60 |
5.29 |
5.05 |
4.45 |
4.95 |
5.29 |
5 |
5.10 |
5.52 |
4.88 |
|||
6 |
4.19 |
5.06 |
3.98 |
|||
7 |
4.02 |
5.15 |
3.98 |
Table
7. The comparison between the experimental and the predicted Ksa
values for the whole sand. Samples 1 and 5 (Port Jefferson) and 6 and 7 (South
Setauket). Surface area and Kd for porous silica, alumnia and
kaolinite for calculation of predicted Ksa were taken from
(Schwazenbach, et al., 1993).
Samples |
Ksa (ml/m2) Experimental (equation 10) |
|
1 |
4.22 |
|
5 |
9.95 |
|
6 |
2.13 |
|
7 |
2.42 |
|
Porous silica |
0.24 |
|
g-Alumina |
0.18 |
|
Kaolinite |
4.08 |