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(a) Effect of time on desorption capacity of algal biomass: dose = 0.1 g/L, EDTA concentration = 0.1 mol/L) (b) Percentage efficiency of five eluents 0.1N of each (HCl, NaOH, HNO3, H2SO4, and EDTA) (c) Five Sorption/Desorption cycles: Ci = 100 mg/L, dose = 0.1 g/L, 0.1 N EDTA.
