Research Article

Biosorption of Cr(III) and Pb(II) by Schoenoplectus californicus and Insights into the Binding Mechanism

Table 2

Percentage of removal of Cr(III) and Pb(II) with biosorbent (5 g L−1) and without biosorbent at pH and at different initial metal concentrations (agitation time: 24 h; temperature: 25°C; BS: biosorbent; : initial concentration).

Chromium (III)Lead (III)
pH 5pH 7pH 5pH 7
With BSWithout BSWith BSWithout BSWith BSWithout BSWith BSWithout BS

0.1 mM79,7 ± 0,437,1 ± 1,959,6 ± 2,087,0 ± 0,465,1 ± 1,731,3 ± 1,683,0 ± 1,589,1 ± 2,5
0.5 mM79,4 ± 0,527,7 ± 1,482,5 ± 2,399,7 ± 0,386,3 ± 2,17,7 ± 0,466,4 ± 4,643,5 ± 5,0
1.5 mM59,4 ± 3,531,2 ± 1,695,4 ± 1,599,9 ± 0,092,2 ± 0,83,0 ± 0,293,4 ± 0,223,5 ± 0,6