Valorisation of Pine Cone as an Efficient Biosorbent for the Removal of Pb(II), Cd(II), Cu(II), and Cr(VI)

Figure 2

(a) Effect of the time on the metal uptake percentage of Cd(II), Cu(II), Pb(II), and Cr(VI) (), , , and adsorbent (). (b) Effect of the pH on the metal uptake percentage of Cd(II), Cu(II), Pb(II), and Cr(VI), , adsorbent , and  h ().

(a)

(b)