Adsorption of Pb (II) Ions by Lemma minor, Potamogeton crispus and Chara vulgaris: Kinetic Modelling

Year 2009, Volume: 3 Issue: 2, 85 - 91, 01.07.2009

Osman Gulnaz

Abstract

In this stud y, adsorption of Pb (II) ions b y aquatic macroph te 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, 8 8.4 and 64 mgg-1 for L. minor, P. crispus an d C. vulgaris, r espectively. Ads orption 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 func tional groups, which incl ude carboxy l (-COOH), phosphate (-PO4), amide (-NH2), and hydroxide (-OH) groups. These functional groups are able to react with heavy metal ions in aqueous solution

Keywords

Lemma minor, Potamogeton crispu s, Chara vulgaris, Adsorption, Kinetic models, Lead ions To whom correspondence should be directed