Arsenic Removal from Aqueous Solutions by Salvadora persica Stem Ash

Table 1

The ranges of experimental parameters.

pH	Adsorbent dosage (g/L)	Salvadora persica stem ash (°C)	Arsenic concentration, 𝜇g/L	Contact time, min
2, 3, 4, 5, 6, 7, 8, 9, 10, 11	0.5, 1.5, 2.5, 3.5, 5, 6	300, 500	50, 100, 150, 200, 400, 500	20, 40, 60, 80, 100, 120, 180, 240