Biosorption Characteristics of Cu(II) and Cd(II) Ions by Modified Alginate

• Published in: Journal of polymers and the environment 2020-12, Vol.28 (12), p.3221-3234
• Main Authors: Alp, Arıcı Tuğba, Safa, Özcan A, Özcan Adnan
• Format: Article
• Language: English
• Subjects: Acids; Alginic acid; Aqueous solutions; Binding sites; Biopolymers; Biosorption; Cadmium; Calcium; Calcium ions; Chemistry; Chemistry and Materials Science; Copper; Drinking water; Environmental Chemistry; Environmental Engineering/Biotechnology; Environmental impact; Heavy metals; Industrial Chemistry/Chemical Engineering; Materials Science; Metal ions; Original Paper; Polymer Sciences; Polymers; Scanning electron microscopy; Sodium alginate; Thiosalicylic acid
• ISSN: 1566-2543; 1572-8919
• DOI: 10.1007/s10924-020-01844-2

In this study, a novel biosorbent was prepared by the modification of sodium alginate with thiosalicylic acid in the presence of calcium ions (TS-A). TS-A was then characterized and its removal performance for Cu(II) and Cd(II) ions from the aqueous solutions was investigated. The effects of batch and column parameters on the biosorption were systematically investigated. The obtained data from the biosorption results were well fitted by the pseudo-second-order kinetic and Langmuir isotherm models. The maximum biosorption capacities of TS-A were found as 426.9 mg g −1 for Cu(II) ions and 592.9 mg g −1 for Cd(II) ions. In the column system, the saturation points of TS-A were obtained as 180 min and 150 min for Cu(II) and Cd(II) ions, respectively. In conclusion, TS-A has provided the removal of heavy metal ions with superior performance by a smart biosorption method, offering advantages such as rapid kinetic and high biosorption capacities.