Trace Elements Analysis in Drinking Water of Meghalaya by Using Graphite Furnace-Atomic Absorption Spectroscopy and in relation to Environmental and Health Issues
Table 3
Concentrations of trace elements in ppm found in (raw) untreated and treated water.
Elements
Untreated water
Treated water
EKH
WKH
JH
EKH
WKH
JH
Li
ND
ND
0.01 ± 0.007
ND
ND
0.01 ± 0.002
Na
142 ± 2.60
140 ± 5.15
125 ± 5.06
143 ± 4.36
145 ± 6.33
139 ± 8.53
Cr
0.05 ± 0.004
0.03 ± 0.001
0.02 ± 0.009
0.02 ± 0.002
0.01 ± 0.009
0.02 ± 0.002
Mn
0.03 ± 0.006
0.02 ± 0.003
0.04 ± 0.008
0.04 ± 0.002
0.04 ± 0.008
0.03 ± 0.006
Fe
0.29 ± 0.003
0.10 ± 0.001
0.16 ± 0.001
0.18 ± 0.003
0.09 ± 0.001
0.12 ± 0.001
Co
0.08 ± 0.004
0.05 ± 0.002
0.05 ± 0.007
0.02 ± 0.003
0.03 ± 0.007
0.03 ± 0.007
Ni
0.07 ± 0.006
0.04 ± 0.004
0.06 ± 0.007
0.02 ± 0.006
0.01 ± 0.008
0.03 ± 0.004
Cu
0.02 ± 0.002
0.01 ± 0.004
0.02 ± 0.006
0.10 ± 0.005
0.30 ± 0.004
0.12 ± 0.008
Zn
0.43 ± 0.02
0.12 ± 0.008
0.16 ± 0.07
0.14 ± 0.003
0.12 ± 0.007
0.30 ± 0.002
As
ND
ND
ND
ND
ND
ND
Se
1.53 ± 0.08
1.66 ± 0.02
1.95 ± 0.03
0.44 ± 0.06
0.54 ± 0.002
1.25 ± 0.05
Rb
ND
ND
ND
ND
ND
ND
Mo
0.07 ± 0.006
0.08 ± 0.004
0.08 ± 0.001
0.02 ± 0.009
0.04 ± 0.002
0.01 ± 0.007
Ag
ND
ND
ND
ND
ND
ND
Cd
0.02 ± 0.004
ND
ND
0.02 ± 0.004
0.08 ± 0.008
0.06 ± 0.002
Au
ND
ND
ND
ND
ND
ND
Pb
0.12 ± 0.003
0.10 ± 0.009
0.06 ± 0.006
0.04 ± 0.004
0.02 ± 0.007
0.04 ± 0.006
Ca
1.74 ± 0.02
0.24 ± 0.04
0.26 ± 0.04
10.34 ± 0.53
11.71 ± 0.10
8.52 ± 0.14
Mg
2.25 ± 0.06
1.40 ± 0.09
1.87 ± 0.03
5.76 ± 0.82
1.50 ± 0.06
1.20 ± 0.02
K
4.30 ± 0.13
1.20 ± 0.09
2.57 ± 0.03
6.39 ± 0.10
1.42 ± 0.03
1.92 ± 0.30
Results are mean ± SD of 25 observations each; ND: not detectable; EKH: East Khasi Hills; WKH: West Khasi Hills; JH: Jaintia Hills.
