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Table 4 Chemical analysis of CSG water

From: Novel pre-treatment of zeolite materials for the removal of sodium ions: potential materials for coal seam gas co-produced wastewater

  Na+ Ca2+ Mg2+ Cl \( {\text{HCO}}_{3}^{ - } \) SAR \( \left( {{\text{mEq/mEq}}^{1/2} } \right) \) EC \( ({\text{dS/cm}}) \) pH
\( \bar{X} \)         
 (mg/L) 1156.4 28.3 5.6 1993 618.1 104 6.02 8.34
 (mEq/L) 50.3 0.35 0.12 56.2 10.1
σ         
 (mg/L) 241.6 38.5 2.8 759.9 140.7 20 1.48 0.58
 (mEq/L) 10.5 0.4 0.06 21.4 2.3