季节 | 月份 | 统计值 | Pi | Pn | ||||||
As | Cd | Cr | Cu | Pb | Zn | 范围 | 均值 | |||
冬季 | 12月 | 范围 | 0.048~0.073 | 0.012~0.014 | 0.000~0.004 | 0.001~0.001 | 0.001~0.002 | 0.003~0.005 | 0.035~0.053 | 0.046 |
均值 | 0.064 | 0.013 | 0.002 | 0.001 | 0.001 | 0.004 | ||||
1月 | 范围 | 0.037~0.048 | 0.012~0.014 | 0.000~0.006 | 0.000~0.001 | 0.001~0.003 | 0.003~0.004 | 0.027~0.035 | 0.032 | |
均值 | 0.044 | 0.012 | 0.002 | 0.001 | 0.002 | 0.003 | ||||
2月 | 范围 | 0.031~0.036 | 0.012~0.014 | 0.001~0.003 | 0.000~0.001 | 0.002~0.005 | 0.003~0.009 | 0.023~0.026 | 0.024 | |
均值 | 0.033 | 0.012 | 0.002 | 0.001 | 0.003 | 0.005 | ||||
春季 | 3月 | 范围 | 0.039~0.055 | 0.011~0.013 | 0.001~0.008 | 0.001~0.001 | 0.002~0.006 | 0.002~0.005 | 0.028~0.040 | 0.033 |
均值 | 0.046 | 0.012 | 0.003 | 0.001 | 0.003 | 0.003 | ||||
4月 | 范围 | 0.051~0.108 | 0.011~0.013 | 0.001~0.002 | 0.000~0.001 | 0.001~0.009 | 0.002~0.008 | 0.037~0.078 | 0.052 | |
均值 | 0.072 | 0.012 | 0.002 | 0.001 | 0.004 | 0.004 | ||||
5月 | 范围 | 0.100~0.127 | 0.011~0.023 | 0.000~0.003 | 0.000~0.001 | 0.001~0.006 | 0.002~0.006 | 0.072~0.091 | 0.083 | |
均值 | 0.115 | 0.013 | 0.001 | 0.001 | 0.002 | 0.004 | ||||
夏季 | 6月 | 范围 | 0.122~0.130 | 0.006~0.012 | 0.002~0.005 | 0.000~0.001 | 0.001~0.003 | 0.002~0.005 | 0.088~0.094 | 0.090 |
均值 | 0.126 | 0.007 | 0.003 | 0.001 | 0.002 | 0.004 | ||||
7月 | 范围 | 0.123~0.152 | 0.000~0.001 | 0.003~0.008 | 0.001~0.001 | 0.000~0.001 | 0.003~0.008 | 0.089~0.109 | 0.098 | |
均值 | 0.137 | 0.000 | 0.005 | 0.001 | 0.001 | 0.005 | ||||
8月 | 范围 | 0.276~0.324 | 0.000~0.001 | 0.003~0.005 | 0.001~0.008 | 0.001~0.008 | 0.001~0.008 | 0.198~0.232 | 0.222 | |
均值 | 0.310 | 0.000 | 0.004 | 0.002 | 0.002 | 0.003 |