Sites/stations (n = 140) | ADD of individuals heavy metals (μg kg−1 day−1) | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
As | Hg | Pb | Cr | Ni | |||||||
Adult | Child | Adult | Child | Adult | Child | Adult | Child | Adult | Child | ||
North | 1 | 0.005 | 0.017 | ND | ND | 0.030 | 0.093 | 0.015 | 0.047 | 0.044 | 0.137 |
2 | 0.005 | 0.016 | ND | ND | 0.015 | 0.047 | 0.020 | 0.064 | 0.032 | 0.101 | |
3 | 0.004 | 0.014 | ND | ND | 0.025 | 0.079 | 0.035 | 0.109 | 0.114 | 0.360 | |
4 | 0.010 | 0.030 | ND | ND | 0.038 | 0.120 | 0.215 | 0.678 | 0.044 | 0.138 | |
5 | 0.005 | 0.017 | ND | ND | 0.017 | 0.055 | 0.097 | 0.307 | 0.056 | 0.175 | |
6 | 0.009 | 0.028 | ND | ND | 0.025 | 0.079 | 0.130 | 0.411 | 0.067 | 0.212 | |
7 | 0.007 | 0.023 | ND | ND | 0.013 | 0.041 | 0.631 | 1.988 | 0.016 | 0.051 | |
South | 8 | 0.006 | 0.019 | ND | ND | 0.013 | 0.041 | 0.013 | 0.041 | 0.028 | 0.089 |
9 | 0.003 | 0.010 | ND | ND | 0.019 | 0.059 | 0.019 | 0.060 | 0.014 | 0.044 | |
10 | 0.007 | 0.023 | ND | ND | 0.017 | 0.055 | 0.137 | 0.430 | 0.039 | 0.123 | |
11 | 0.008 | 0.024 | ND | ND | 0.014 | 0.043 | 0.294 | 0.928 | 0.007 | 0.021 | |
12 | 0.006 | 0.020 | ND | ND | 0.011 | 0.035 | 0.295 | 0.930 | 0.045 | 0.143 | |
13 | 0.005 | 0.016 | ND | ND | 0.021 | 0.066 | 0.229 | 0.721 | 0.047 | 0.147 | |
14 | 0.006 | 0.020 | ND | ND | 0.014 | 0.044 | 0.365 | 1.149 | 0.013 | 0.041 | |
East | 15 | 0.004 | 0.011 | ND | ND | 0.012 | 0.037 | 0.024 | 0.077 | 0.010 | 0.032 |
16 | 0.007 | 0.021 | ND | ND | 0.018 | 0.058 | 0.399 | 1.257 | 0.008 | 0.026 | |
17 | 0.004 | 0.014 | ND | ND | 0.013 | 0.042 | 0.830 | 2.616 | 0.061 | 0.193 | |
18 | 0.010 | 0.032 | ND | ND | 0.022 | 0.070 | 0.017 | 0.053 | 0.065 | 0.204 | |
19 | 0.008 | 0.024 | ND | ND | 0.018 | 0.056 | 0.020 | 0.064 | 0.013 | 0.039 | |
20 | 0.005 | 0.017 | ND | ND | 0.020 | 0.063 | 0.021 | 0.066 | 0.021 | 0.065 | |
21 | 0.006 | 0.018 | ND | ND | 0.027 | 0.084 | 0.149 | 0.468 | 0.031 | 0.097 | |
West | 22 | 0.006 | 0.018 | 0.007 | 0.023 | 0.019 | 0.061 | 0.086 | 0.272 | 0.061 | 0.193 |
23 | 0.014 | 0.044 | ND | ND | 0.048 | 0.150 | 0.226 | 0.713 | 0.469 | 1.479 | |
24 | 0.006 | 0.020 | ND | ND | 0.011 | 0.035 | 0.268 | 0.845 | 0.014 | 0.045 | |
25 | 0.006 | 0.020 | ND | ND | 0.022 | 0.070 | 0.011 | 0.035 | 0.109 | 0.343 | |
26 | 0.008 | 0.026 | ND | ND | 0.019 | 0.060 | 0.042 | 0.133 | 0.106 | 0.333 | |
27 | 0.009 | 0.027 | ND | ND | 0.023 | 0.072 | 0.159 | 0.501 | 0.050 | 0.158 | |
28 | 0.007 | 0.023 | ND | ND | 0.027 | 0.084 | 0.199 | 0.626 | 0.088 | 0.278 | |
Center | 29 | 0.008 | 0.026 | ND | ND | 0.018 | 0.057 | 0.146 | 0.459 | 0.053 | 0.168 |
30 | 0.007 | 0.023 | ND | ND | 0.019 | 0.061 | 0.090 | 0.284 | 0.041 | 0.129 | |
31 | 0.005 | 0.016 | ND | ND | 0.020 | 0.063 | 0.057 | 0.179 | 0.054 | 0.170 | |
32 | 0.006 | 0.018 | 0.007 | 0.023 | 0.021 | 0.065 | 0.281 | 0.886 | 0.034 | 0.107 | |
33 | 0.005 | 0.015 | ND | ND | 0.016 | 0.051 | 0.051 | 0.161 | 0.057 | 0.179 | |
34 | 0.007 | 0.023 | 0.004 | 0.011 | 0.029 | 0.091 | 0.696 | 2.194 | 0.130 | 0.408 | |
35 | 0.005 | 0.016 | ND | ND | 0.023 | 0.071 | 0.014 | 0.045 | 0.043 | 0.134 | |
Mean | 0.007 | 0.021 | 0.001 | 0.002 | 0.020 | 0.064 | 0.180 | 0.566 | 0.060 | 0.187 | |
Standard deviation | 0.002 | 0.006 | 0.002 | 0.005 | 0.007 | 0.023 | 0.199 | 0.628 | 0.077 | 0.242 |