Tables for Chapter 3 -Sorption of hydrophobic organic compounds

 

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