Occurrence, Source, and Mobilization of Iron, Manganese, and Arsenic Pollution in Shallow Aquifer
Table 1
Statistical analyses of the groundwater data in the premonsoon (PRM) and postmonsoon (POM) seasons, 2020.
Turb.
pH
EC
TH
Fe
Mn
As
HCO3-
SO42-
NO3-
DO
DOC
log10pCO2
Premonsoon (PRM),
Min.
1.93
6.65
366
122
1.09
0.86
0
271.5
2.91
0.80
0.68
0.61
-2.458
Max.
19.56
7.80
1035
562
14.7
6.08
0.02
703
45.7
14.3
4.35
13.60
-0.884
Mean
6.26
7.02
669.6
362.2
9.63
3.44
0.008
418.6
16.46
4.14
2.13
4.46
-1.952
SD (±)
4.37
0.22
172.5
93.52
3.60
1.50
0.006
110.8
9.29
3.81
1.00
3.27
0.260
Skewness
1.57
2.10
0.36
-0.07
-0.55
0.05
0.11
1.36
1.19
1.11
0.49
0.39
-0.933
Postmonsoon (POM),
Min.
2.29
7.0
662
225
1.59
0.96
0
248.5
2.95
0.80
0.81
0.60
-3.514
Max.
26.09
8.91
1708
615
17.2
6.58
0.02
817
41.7
18.3
4.02
13.71
-1.260
Mean
7.85
7.83
956.8
404.7
10.7
3.76
0.008
448.8
15.14
3.7
2.07
5.71
-2.272
SD (±)
5.06
0.40
206.1
94.03
3.56
1.54
0.006
124.5
9.25
3.64
0.95
3.22
0.450
Skewness
1.66
0.02
1.31
0.59
-0.46
-0.07
0.11
0.61
1.33
2.01
0.31
0.38
-0.009
Note: (a) = number of samples, Turb. = turbidity; EC = electrical conductivity, TH = total hardness; DO = dissolved oxygen; DOC = dissolved organic carbon. (b) The unit of all parameters is in mg/L except pH, turbidity in NTU, and EC in μS/cm.
