Fig. 7From: Tosyl-carrageenan/alginate composite adsorbent for removal of Pb2+ ions from aqueous solutionsa pH Effect on the adsorption [0.15 g adsorbent dosage, 100 mL Pb2+ ions; 50 mg/L, and contact time 120 min, room temperature]. b Determination of zero-point chargeBack to article page