Sonication Enhanced Removal of Nickel and Cobalt Ions from Polluted Water Using an Iron Based Sorbent

Table 3

The removal efficiency of nickel and cobalt ions in solutions containing both ions by applying sonication in optimum times.

Entry	Initial concentration of Ni^2+ (mg/L)	Initial concentration of Co^2+(mg/L)	Optimum sonication time (min)	Removed Ni^2+(mg/L)	Removed Co^2+(mg/L)
1	50	5	30	25	5
2	50	15	30	30	10
3	50	25	30	30	14
4	50	35	30	30	13
5	50	50	30	31	14
6	50	75	30	32	13