Adsorption of Pb (II) Ions by Lemma minor, Potamogeton crispus and Chara vulgaris: Kinetic Modelling
Keywords:
Lemma minor, Potamogeton crispus, Chara vulgaris, Adsorption, Kinetic models, Lead ions To whom correspondence should be directed,Abstract
In this study, adsorption of Pb (II) ions by aquatic macrophte Lemma minor, Potamogeton crispus and Chara vulgaris. The effects of pH, initial metal concentration on adsorption were determined. The optimum adsorption pH was determined to be 4 for L. minor and P. crispus and pH 5 for C. vulgaris. Maximum adsorption capacities of adsorbents
were determined to be 93.4, 88.4 and 64 mgg-1 for L. minor, P. crispus and C. vulgaris, respectively. Adsorption efficiency was observed in the order of L. minor P. crispus C. vulgaris for removal of Pb (II) ions. The adsorption kinetics were also found to be well-described by the pseudo second-order and intra-particle diffusion models. L. minor, P. crispus and C. vulgaris have different functional groups, which include carboxyl (-COOH), phosphate (-PO4), amide (-NH2), and hydroxide (-OH) groups. These functional groups are able to react with heavy metal ions in aqueous solution.
