Environmental Engineering Reference
In-Depth Information
Table 2
Statistical parameters of total heavy metal content (mg/kg) in urban soils of Iassy city
(n = 64) situated lengthways of the main streets as compared to normal content (NC), maximum
allowable limits (MAL) and alarm threshold (AT) for a less sensible
Cd
Co
Cr
Cu
Mn
Ni
Pb
Zn
Parameter
a
mg/kg
xmin
0.1
10
15
8
340
23
47
73
xmax
3.9
37
63
42
693
74
432
215
x
1.7
26
31
23
521
42
152
112
s
0.6
9
10
9
164
12
61
52
xg
1.5
21
30
20
509
40
143
109
Me
1.4
22
28
21
517
37
138
101
NC
b
0.3
5
30
20
500
20
15
50
MAL
c
3.0
50
100
100
50
100
300
AT
d
5.0
100
300
250
2,000
200
250
700
a
idem Table
1
.
b
idem Table
1
.
c
idem Table
1
.
d
idem Table
1
.
Table 3
Statistical parameters of total heavy metal content (mg/kg) in urban soils of Baia
Mare city (n = 73) situated lengthways of the main streets as compared to normal content
(NC), maximum allowable limits (MAL) and alarm threshold (AT) for a less sensible
Cd
Co
Cr
Cu
Mn
Ni
Pb
Zn
Parameter
a
mg/kg
xmin
0.3
11
10
22
449
16
131
139
xmax
3.9
107
30
329
880
46
3510
2115
x
1.6
23
20
157
520
27
794
589
s
0.5
16
5
93
163
8
611
517
xg
1.4
22
19
146
497
25
729
507
Me
1.3
20
18
139
501
23
707
483
NC
b
0.3
5
30
20
500
20
15
50
MAL
c
3.0
50
100
100
50
100
300
AT
d
5.0
100
300
250
2,000
200
250
700
a
idem Table
1
.
b
idem Table
1
.
c
idem Table
1
.
d
idem Table
1
.
the maximum allowable limits (MAL), with some variation at the half interval
between the normal content and MAL value, more precisely (
Tables 1
and
2
).
The medium lead content exceeds by 1.5 and 1.2 times, respectively, the MAL
value for Iassy and Bucharest urban soils. The medium lead content in Baia Mare
urban soils (Table
3
) exceed by 3.2 times the alert threshold value. This high content
is caused by the cumulative pollutant effect of traffic and industrial emissions of the
nonferrous ore processing industry. Analyses of maximum values for the eight
chemical elements in Baia Mare soils have revealed that Co, Cu, Pb and Zn exceed
the alert threshold for a sensitive use of land.
