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Table 2 Composition of natural waters and Marcellus Shale water (mg/L)

From: How long do natural waters “remember” release incidents of Marcellus Shale waters: a first order approximation using reactive transport modeling

Species S aquifer [38, 43] SG aquifer [18, 44] River [45] Marcellus Shale water [46]
pH 7.40 7.44 7.37 6.90
Br 2.02 × 10−2 2. 00 × 10−2 1.29 × 10−2 1.87 × 102
Cl 7.99 × 100 5.89 × 100 8.20 × 100 2.92 × 104
SO4 9.98 × 10−1 1.39 × 101 1.54 × 101 6.60 × 100
Al 2.00 × 10−1
Ba 1.20 × 10−1 1.60 × 10−1 2.14 × 10−1 1.01 × 103
Cd 4.98 × 10−2
Ca 4.24 × 101 3.62 × 101 1.57 × 101 1.59 × 103
Cu 2.50 × 10−1
Fe 1.00 × 10−1 5.00 × 10−2 5.99 × 10−2 3.44 × 101
Pb 1.00 × 10−2 1.00 × 10−2 1.00 × 10−2 3.00 × 10−2
Mg 1.64 × 100 6.98 × 100 3.07 × 100 1.50 × 102
Mn 6.00 × 10−3 6.00 × 10−3 1.02 × 100
K 2.80 × 100 1.27 × 100 9.01 × 10−1 6.40 × 102
Na 1.85 × 101 1.09 × 101 8.37 × 100 1.32 × 104
Sr 2.90 × 10−1 2.82 × 10−1 3.90 × 102
Zn 4.00 × 10−5 4.00 × 10−5 1.78 × 101 1.70 × 10−1
Alkalinity as \( {\text{HCO}}_{3}^{ - } \) 1.77 × 102 a 1.49 × 102 a 9.88 × 101 2.45 × 102 b
  1. Water chemistry data are among the range of reported literature
  2. aAlkalinity (as \( {\text{HCO}}_{3}^{ - } \)) was calculated based on equilibrium with calcite using CRUNCHFLOW and is in the range of reported value of 51–366 mg/L for sandstone aquifer water and of 85–195 mg/L for sand and gravel aquifer water
  3. bAlkalinity is directly from literature. Charges are balanced in all natural waters