taken in ZK2, and represented 1.29, 1.86, 1.42 times of the standard values for
TDS, Cl
− and Na
+ respectively, indicating serious groundwater contamination.
• Metals
Except for Be, Cd, Cr
6+ and As, all metals (Al, Cr, Ni, Cu, Zn, Ba, Pb, Fe, Mn)
were all detected. According to the Quality Standards for Groundwater (GB/
T14848–2017) and WHO drinking water standards, Al, Ni, Ba, Fe and Mn existed
in excess, and their concentrations ranged 0.0689–0.29 mg/L (with an average of
0.17 mg/L), 0.00308–0.0325 mg/L (with an average of 0.01 mg/L), 0.0467–
0.948 mg/L (with an average of 0.384 mg/L), 0.02–1.12 mg/L (with an average of
Table 5.22 Groundwater monitoring results of monitoring wells in the Luanshiwan Landfill
during the wet season (mg/L)
Test items
Sample No.
1#
2#
Surface water
2-1
3#-1 3#-2 Roadside
water 4-1
Chromaticity
80
160
160
16
80
160
Flavor level (before
boiled)
3
3
3
2
2
3
Flavor level (after
boiled)
3
4
3
3
3
3
pH (dimensionless)
6.99
7.38
8.05
7.63
7.36
6.96
Conductivity (ls/cm) 158
7.27 Â 103 7.70 Â 103
409
411
235
Residue
708
2.02 Â 103 2.02 Â 103
290
370
841
Total hardness
(mmol/L)
0.53
3.58
3.78
0.58
0.64
0.47
CODcr
46
640
677
147
52
33
BOD5
6.8
67.7
75.8
16.4
4.6
3.6
Suspended solids
440
472
156
132
248
492
Ammonia nitrogen
0.495 82.2
143
120
1.70
1.48
Total phosphorus
0.09
0.96
0.93
0.07
0.06
0.08
Sulfate
5.95
7.47
8.22
0.812 0.841 4.40
Chloride
1.31
574
572
30.9
29.9
7.36
Nitrite (nitrogen)
ND
ND
ND
ND
ND
ND
Arsenic (lg/L)
2.8
45.0
23.2
2.4
1.4
2.0
Antimony (lg/L)
ND
6.4
10.0
ND
ND
3.9
Copper
ND
ND
ND
ND
ND
ND
Zinc
0.06
ND
ND
ND
ND
ND
Nickel
ND
ND
ND
ND
ND
ND
Chromium
ND
ND
0.07
ND
ND
ND
Cadmium (lg/L)
ND
ND
ND
ND
ND
ND
Note “ND” means that the test value is lower than the detection limit
5.1 Central China
129