Table 5 Strontium concentration in the supernatant on day 5 at different biosurfactant concentrations (0.006, 0.015, and 0.024 g/mL) and temperatures (25 °C and 60 °C) based on ICP results.

From: Eco-friendly removal of strontium from produced water of an oilfield in western Iran using biosurfactant derived from Malva sylvestris leaves

Sample

Temperature (°C)

Concentration (g/mL)

Final Sr concentration (mg/L)

Removal efficiency (%)

1

60

0.024

229

63.6%

2

0.015

314.7

50%

3

0.006

503.3

20%

4

25

0.024

277.9

55.8%

5

0.015

386.5

38.5%

6

0.006

579

8%

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