Table 5.

Sorption and desorption cycles using CAM-D2EHPA sorbent.

Cycles	Pb(II)			Ni(II)
Number of Cycles	pHe	Sorption (%)	Desorption (%)	pHe	Sorption (%)	Desorption (%)
1	2.5	97.8	94.0	2.5	83.2	99.1
2	2.6	97.8	92.5	2.6	74.8	99.5
3	2.5	97.6	88.8	2.5	74.8	99.6
4	2.6	97.7	97.5	2.7	80.7	93.7
5	2.6	97.9	89.3	2.6	76.5	92.6
6	2.6	97.7	94.1	2.6	74.7	95.0
7	2.6	97.7	89.0	2.6	76.3	93.8
8	2.6	98.3	87.0	2.6	74.9	96.5
9	2.6	98.3	81.4	2.6	77.2	94.7
10	2.6	98.5	88.0	2.6	77.2	95.7