Agriculture Reference
In-Depth Information
less than 5%. In 2007 survey, percentage of OCDD is in the range of 40.81 to 90.97 with an
average of 58.51, and the average ratio of PCDFs to PCDDs is 0.40. In 2010, the average
percentage of OCDD distribution is 43.51 and the mean ratio is 0.72. That means the
proportion of OCDD decreases and the ratio of PCDFs to PCDDs increases, and this change
might be caused by PCDD/Fs source from combustion or other thermal processes.
2007 S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 SB
TeCDD 7.40 0.24 2.15 2.08 0.86 5.18 2.82 4.81 2.12 1.44 1.61 3.00
PeCDD 3.19 0.12 0.77 1.00 0.18 2.58 2.59 2.41 0.64 ND 2.49 3.61
HxCDD 2.02 0.39 1.23 3.42 0.72 3.82 3.80 2.15 2.46 2.51 1.23 3.86
HpCDD 7.49 2.14 5.07 7.60 3.55 7.07 7.74 5.44 4.93 5.25 7.41 6.38
OCDD 41.0 91.0 79.3 48.7 88.3 42.2 41.3 58.0 59.4 59.2 56.6 40.8
TeCDF 17.2 1.76 4.30 9.80 2.82 16.2 9.51 14.5 6.02 8.09 5.87 13.8
PeCDF 6.23 0.79 1.55 8.12 1.00 6.13 7.41 3.34 7.43 6.11 6.57 4.69
HxCDF 7.37 1.31 3.01 9.13 1.28 7.85 9.35 4.26 7.22 8.94 7.28 10.2
HpCDF 6.95 1.16 1.39 8.04 0.89 5.99 10.24 2.99 6.31 5.21 6.31 7.52
OCDF
1.15 1.13 1.24 2.10 0.44 2.98 5.26 2.17 3.46 3.21 4.68 6.14
Table 2. PCDD/Fs homologue distribution in soil of 2007, %.
2008 S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 SB
TeCDD 0.80 0.26 1.76 0.83 0.20 2.31 1.97 2.59 1.92 3.10 1.26 2.02
PeCDD 0.74 0.29 0.78 0.85 0.31 2.94 1.60 2.64 2.31 2.45 1.51 2.24
HxCDD 1.14 0.27 2.63 2.09 0.67 4.58 2.55 2.81 3.43 4.44 1.69 6.78
HpCDD 1.17 1.55 5.43 3.49 3.44 5.16 3.08 4.60 4.17 5.59 3.22 4.42
OCDD 58.4 73.8 56.3 36.1 91.6 32.6 18.5 43.6 40.8 28.9 26.8 43.3
TeCDF 6.70 1.87 10.2 4.94 1.37 13.0 15.7 11.4 8.92 14.2 6.19 17.7
PeCDF 6.28 1.33 8.40 5.89 0.77 13.8 14.8 12.3 6.45 7.42 4.68 11.4
HxCDF 5.78 1.47 8.00 5.27 0.66 12.11 14.3 8.16 7.68 12.3 4.64 5.48
HpCDF 2.87 1.43 4.33 5.22 0.60 7.21 7.77 4.56 7.27 11.4 6.05 3.96
OCDF 16.1 17.7 2.22 35.4 0.35 6.33 19.8 7.38 17.1 10.3 44.0 2.72
Table 3. PCDD/Fs homologue distribution in soil of 2008, %.
2009
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
SB
TeCDD
3.06
0.36
1.14
3.40
0.68
3.09
3.10
3.49
1.77
2.82
3.05
2.57
PeCDD
3.41
0.45
1.42
3.21
0.68
5.00
4.42
3.37
1.86
3.62
3.40
2.70
HxCDD
4.51
0.63
2.37
5.81
1.04
4.30
5.17
2.92
3.68
3.74
4.02
3.90
HpCDD
4.42
2.02
5.24
5.23
3.69
5.17
5.67
5.10
4.35
6.16
5.63
4.66
OCDD
41.9
88.2
70.0
25.8
84.2
33.1
37.7
55.8
52.9
40.5
39.1
44.4
TeCDF
14.4
2.53
5.53
20.7
3.29
13.1
11.0
9.50
11.7
10.6
19.5
11.8
PeCDF
9.36
1.71
5.14
10.5
2.16
8.18
9.65
9.91
8.89
7.28
7.65
11.6
HxCDF
10.3
1.68
4.37
11.9
1.87
9.67
11.6
4.71
6.88
11.0
8.08
8.00
HpCDF
6.50
1.15
3.13
8.84
1.55
8.52
7.09
3.27
4.76
9.22
6.09
5.93
OCDF
2.23
1.23
1.71
4.52
0.83
9.86
4.57
1.98
3.16
5.15
3.46
4.40
Table 4. PCDD/Fs homologue distribution in soil of 2009, %.
