Toxic pollutants
μg/L
Metals and inorganics
Antimony
3/3
1–3
<2
<2
1/1
<5
Arsenic
3/3
1–4
<2.3
<2
1/1
<10
Beryllium
3/3
<1–<5
<2.3
1
1/1
<10
Cadmium
3/3
3–5
<4.3
<5
1/1
19
Chromium
3/3
21–54
15
11
1/1
5
Copper
3/3
39–5,300
2,200
1,300
1/1
<10
Cyanide
3/2
<10–65
<38
1/1
10
Lead
3/3
62–1,700
640
170
1/1
<5
Mercury
3/3
<1–2
<1.3
<1
1/1
<5
Nickel
3/3
20–150
79
70
1/1
<10
Machining,
flow¼ 0.32 L/S
Selenium
3/3
<3–80
<29
5
1/1
<10
Silver
3/3
<1–7
<3.3
<2
1/1
<10
Thallium
3/3
<1–<20
<8.3
4
1/1
<2
Zinc
3/3
61–240
120
64
1/1
38
Toxic organics
Acenaphthene
3/2
<10–<10
<10
–
1/0
–
Benzene
3/2
<10–<10
<10
–
1/0
–
1,1,1-Trichloroethane
3/1
68
–
–
1/0
Chloroform
3/1
<10
–
–
1/0
2-Chlorophenol
3/1
<10–<10
<10
1/0
1,2-Diphenylhydrazine
3/2
<10
1/0
Fluoranthene
3/1
<10–<10
<10
1/0
Methylene chloride
3/2
<10–49
<23
<10
1/0
Naphthalene
3/3
<10–<10
<10
<10
1/0
(continued)
4 Electrical and Electronic Wastes Treatment
127