(a) Changes in the Spirogyra and Cladophora spp. algae powder removal solution Pb(II) or Cu(II) reaction time. The pH value of the solution was set as 5.0. (b) With
different pH values, Spirogyra and Cladophora spp. powder removes Pb(II) or Cu(II) heavy metal solutions from water. The dosage of algae powder was 1.0 g L1. (c) Results of
Spirogyra and Cladophora spp. adsorption under various concentrations of heavy metal solution, with a pH value of 5.0. (d) Effects of various algae dosages on adsorption of
heavy metal solutions, with heavy metal concentrations of 100 mg L1 and pH value of 5.0.