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. 2016 Apr 22;11:217. doi: 10.1186/s11671-016-1434-5

Table 1.

Average value of concentration of contents in oil-based wastewater samples used in this study

Ions (mg/L)
Total	Cations				Anions		Oil (mg/L)
Total	Ca²⁺	K⁺	Mg²⁺	Na⁺	Cl⁻	SO₄ ²⁻
23860.7	191.3	63.6	42.2	11350.9	10304.2	1908.5	812.9