Competitive and Noncompetitive Batch Sorption Studies of Aqueous Cd(II) and Pb(II) Uptake onto Coffea canephora Husks, Cyperus papyrus Stems, and Musa spp. Peels

Table 1

Total levels of cations (µg/g) in the biomass studied.

Cation	C. canephora	C. papyrus	Musa spp.
Mn	11.5	34.6	11.7
Fe	4.2	1.98	1.53
Ni	0.9	0.27	0.91
Cu	18.6	1.26	2.93
Zn	5.3	10.99	17.79
Cd	0.02	0.04	0.01
Pb	0.46	0.18	1.23
Ca	1329	276	198
Mg	420	93.8	278
Na	19.5	413	17.3
K	7724	6025	9030
Al	27.5	2.5	19.3
B	27.5	2.8	14.5