Metal
|
Pond 1
|
Pond 2
|
Pond 3
|
Pond 4
|
Pond 5
|
Pond 6
|
Pond 7
|
Pond 8
|
Pond 9
|
Pond 10
|
NESREA limit
|
---|
Cu
|
0.01 ± 0.00
|
0.01 ± 0.02
|
0.01 ± 0.00
|
0.01 ± 0.00
|
0.04 ± 0.01
|
0.01 ± 0.00
|
0.01 ± 0.00
|
0.09 ± 0.01
|
0.06 ± 0.01
|
0.01 ± 0.00
|
0.001
|
Zn
|
0.19 ± 0.04
|
0.22 ± 0.02
|
0.48 ± 0.04
|
0.15 ± 0.01
|
4.58 ± 0.03
|
0.89 ± 0.06
|
2.31 ± 0.05
|
1.96 ± 0.01
|
1.07 ± 0.03
|
2.82 ± 0.04
|
0.01
|
Pb
|
0.01 ± 0.00
|
0.01 ± 0.00
|
0.01 ± 0.00
|
0.02 ± 0.00
|
0.07 ± 0.01
|
0.19 ± 0.02
|
0.26 ± 0.02
|
0.19 ± 0.00
|
0.29 ± 0.02
|
0.29 ± 0.02
|
0.01
|
Ni
|
ND
|
ND
|
ND
|
ND
|
0.47 ± 0.03
|
0.80 ± 0.01
|
0.22 ± 0.00
|
0.28 ± 0.03
|
0.17 ± 0.02
|
0.39 ± 0.01
|
0.01
|
Cr
|
0.35 ± 0.00
|
0.87 ± 0.03
|
1.36 ± 0.11
|
1.14 ± 0.04
|
1.43 ± 0.02
|
1.14 ± 0.05
|
2.11 ± 0.13
|
2.63 ± 0.03
|
2.57 ± 0.00
|
1.79 ± 0.03
|
0.001 (Cr6+)
|
- Note: Each value is a mean of three replicate samplings. Ponds 1–5: ponds with history of antibiotic usage; Ponds 6–10: ponds without history of antibiotic usage
- Cu copper, Zn zinc, Pb lead, Ni nickel, Cr chromium, ND Not detected, NESREA National Environmental Standards and Regulations Enforcement Agency