Journal of Chemistry / 2015 / Article / Tab 1 / Research Article
Chemical Characteristics and Quality Assessment of Groundwater of Exploited Aquifers in Beijiao Water Source of Yinchuan, China: A Case Study for Drinking, Irrigation, and Industrial Purposes Table 1 Statistics of groundwater quality parameters.
Parameter Aquifer Unit Min Max Median Mean CV Acceptable limits pH Unconfined — 7.27 8.08 7.87 7.78 0.03 6.5–8.5 Confined — 7.89 8.24 8.21 8.15 0.01 TDS Unconfined mg/L 255 1980 740 864.91 0.47 1000 Confined mg/L 224 267 246 246.57 0.05 -NUnconfined mg/L 0.046 0.34 0.06 0.08 0.75 0.2 Confined mg/L 0.116 0.362 0.21 0.22 0.31 TA Unconfined mg/L 149 701 336 334.78 0.36 — Confined mg/L 188 251 203.5 206.29 0.08 TH Unconfined mg/L 210 1089 531 512.35 0.39 450 Confined mg/L 179 222 194 197.50 0.07 CODMn Unconfined mg/L ND 2.1 1 1.03 0.44 3 Confined mg/L ND 1 0.65 0.67 0.25 -NUnconfined mg/L ND 0.211 ND — — 0.02 Confined mg/L ND ND ND ND 0 Na+ Unconfined mg/L 42.6 371 157 178.8 0.47 200 Confined mg/L 26.7 61.5 32.4 34.37 0.26 K+ Unconfined mg/L 4.29 42.1 7.01 10.24 0.84 — Confined mg/L 3.13 8.94 5.48 5.73 0.38 Mg2+ Unconfined mg/L 27.2 213 71.8 79.54 0.52 150 Confined mg/L 24.2 29.5 26.2 26.47 0.06 Ca2+ Unconfined mg/L 39.9 163 87.8 88.03 0.35 200 Confined mg/L 32.7 69.3 38.5 41.89 0.21 F− Unconfined mg/L 0.14 1.82 0.38 0.57 0.84 1 Confined mg/L 0.27 0.43 0.34 0.34 0.14 Cl− Unconfined mg/L 62.5 335 147 177.35 0.45 250 Confined mg/L 55.5 75.7 64.85 64.48 0.09 -NUnconfined mg/L 1.99 26.2 6.53 8.51 0.94 20 Confined mg/L 0.87 2.63 1.22 1.45 0.40 Unconfined mg/L 47.6 466 279 264.45 0.49 250 Confined mg/L 30.5 47.8 36.5 37.64 0.13 Fe Unconfined mg/L ND 0.101 0.003 <0.012 — — Confined mg/L 0.078 0.25 0.183 0.15 0.33 Mn Unconfined mg/L ND 0.737 0.002 <0.050 — — Confined mg/L 0.036 0.077 0.065 0.06 0.17 Se Unconfined mg/L ND 1.76 × 10−3 2.43 × 10−4 — — 0.01 Confined mg/L ND 6.00 × 10−3 ND — — Hg Unconfined mg/L 1.60 × 10−5 1.85 × 10−4 3.70 × 10−5 6.38 × 10−5 0.77 0.001 Confined mg/L 2.50 × 10−5 1.84 × 10−4 9.30 × 10−5 9.64 × 10−5 0.51 As Unconfined mg/L 1.74 × 10−4 1.35 × 10−3 5.63 × 10−4 5.99 × 10−4 0.45 0.05 Confined mg/L 1.51 × 10−4 1.28 × 10−3 2.83 × 10−4 3.89 × 10−4 0.77 TC Unconfined mpn/L ND 2005 222 — — 3 Confined mpn/L ND 150 ND — — TBC Unconfined cfu/mL 0 102 20 30.8 1.1 100 Confined cfu/mL 0 12 0 1.14 2.82
CV: coefficient of variation; ND: not detected.