Chemical Modifications of Cassava Peel as Adsorbent Material for Metals Ions from Wastewater

Table 2

Mean concentration of elements of the adsorbents.

Adsorbent	K	Ca	Mg	Cu	Zn	Mn	Fe	Cd	Pb	Cr
	g kg^−1			mg kg^−1
M. in natura	24.10	35.03	6.83	14.33	32.00	123.33	335.66	>0.005	13.00	>0.01
M. H2O2	7.84	5.68	1.27	10.60	32.20	121.50	333.70	>0.005	10.40	>0.01
M. H2SO4	5.78	3.41	0.43	4.30	20.40	115.70	330.90	>0.005	5.10	>0.01
M. NaOH	11.22	6.52	1.49	4.80	32.60	122.00	331.60	>0.005	11.50	>0.01

QL (quantification limit): K = 0.01; Ca = 0.005; Mg = 0.005; Cu = 0.005; Fe = 0.01; Mn = 0.01; Zn = 0.005; Cd = 0.005; Pb = 0.01; Cr = 0.01 (mg kg⁻¹).