Study on the Mechanism of Pb(Ⅱ) and Cu(Ⅱ) Biosorptionby Two Brown Algae

Abstract:

The ability to remove lead and copper from aqueous solution by brown algae Laminaria japonica and Undaria pinnatifida were investigated in this study.Results were drawn as follows:Pretreatment with Ca(NO3)2,the absorption capacity of two algae for Cu(Ⅱ) decreased by 28%,for Pb(Ⅱ) decreased by 10%.The contribution of functional groups in the biosorption process was confirmed by chemical modification of the groups.The functional group of carboxyl was mainly responsible for the adsorption of two algae investigated here towards Pb2+.The co-anion affect the absorption capacity.When copper chloride was used,higher qmax and k2 were observed as compared to the nitrates and the sulfate at the same pH.