Table A3. Concentration (g/L) of cadmium sorbed
Table A4. Concentration (g/L) of lead sorbed by
by well casings.
well casings.
Contact time, hours
Contact time, hours
Treatment
1
8
24
72
Treatment
1
8
24
72
CONTROL
20.4
20.0
20.3
20.4
CONTROL
50.7
48.9
49.9
50.2
CONTROL
20.0
19.8
19.7
20.1
CONTROL
48.4
49.5
51.0
51.3
CONTROL
20.0
20.1
20.1
20.2
CONTROL
50.1
51.6
50.1
49.2
X
20.1a
20.0a
20.1a
20.2a
X
49.7a
50.0a
50.3a
50.2a
% RSD
0.94
0.85
1.45
0.74
% RSD
2.43
2.88
1.15
2.05
PVC
18.6
17.2
16.3
15.3
PVC
43.4
36.3
30.8
26.2
PVC
19.5
18.0
17.0
16.5
PVC
45.8
33.4
30.0
28.9
PVC
18.2
16.8
16.6
15.9
PVC
45.1
35.5
30.9
28.7
X
18.8b
17.3d
16.6c
15.9c
X
44.8b
35.1b,c
30.6c
27.9c
% RSD
3.46
3.29
2.22
3.65
% RSD
2.72
4.25
1.57
5.37
PTFE
20.5
19.1
19.8
20.1
PTFE
48.2
48.1
45.5
46.6
PTFE
19.4
19.6
17.5
19.7
PTFE
49.0
45.4
48.3
45.8
PTFE
18.7
18.3
18.4
20.4
PTFE
49.0
48.8
48.7
47.2
X
19.6a,b
19.0b,c
18.6b
20.0a
X
48.72a
47.5a
47.5b
46.5b
% RSD
4.60
3.37
6.14
1.90
% RSD
1.01
3.81
3.66
1.59
FEP
20.2
18.8
19.1
20.1
FEP
49.9
47.7
48.0
46.8
FEP
18.7
19.6
18.0
19.6
FEP
48.2
47.9
46.9
47.2
FEP
20.5
18.9
20.1
19.7
FEP
47.2
47.5
45.0
46.2
X
19.8a,b
19.1a,b
19.1a,b
19.8a,b
X
48.4a
47.7a
46.6b
46.7b
% RSD
4.85
2.15
5.61
1.31
% RSD
2.87
0.36
3.24
1.03
FRE
19.5
18.1
17.0
18.6
FRE
44.6
31.6
28.6
22.0
FRE
19.2
18.9
17.6
18.8
FRE
43.8
33.3
27.7
23.4
FRE
18.9
17.5
19.0
19.7
FRE
44.2
32.9
27.4
21.9
X
19.2a,b
18.2a,b
17.9b,c
19.1b
X
44.2b
32.6c
27.9d
22.4d
% RSD
1.67
3.91
5.77
2.83
% RSD
0.95
2.70
2.18
3.71
FRP
19.2
18.8
18.1
19.1
FRP
45.8
33.4
30.1
23.8
FRP
18.3
19.8
18.0
18.2
FRP
44.4
37.7
27.2
23.8
FRP
20.2
19.2
18.1
19.7
FRP
45.0
35.1
31.8
30.2
X
19.3a,b
19.3a,b
18.1b
19.0b
X
45.1b
35.4b
29.7c,d
26.0c
% RSD
4.93
2.49
0.44
4.01
% RSD
1.55
6.16
7.85
14.25
Values with the same letter for the same time were not signifi-
Values with the same letter for the same time were not signifi-
cantly different.
cantly different.
15
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