Multimetal biosorption in a column using Sargassum biomass

摘要: Removal of Cu, Cd and Zn from multicomponent mixtures by biosorption was studied in equilibrium systems a flow-through column packed with Sargassum algal biosorbent pre-saturated potassium. The elution order Zn, Cu the their concentration overshoots at exit, were due to differing affinities biosorbent. Low-affinity broke through faster than sharp favorable breakthrough curve pretreatment biomass K which features lowest affinity all ionic species examined. K-form gives most effective utilization bed. An overshoot exit observed explained sequential ion exchange between during operation same effect for both when present feed solution. sorbing onto K-Sargassum biomass. A followed one that lasted until later complete. In this system, caused mainly its ions While concentrations close together, time interval breakthroughs much longer This behavior is based on magnitude relative K-biomass determined batch experiments. coefficients were: KZn/K=1.96, KCd/K=3.70 KCu/K=16.51.