ENTRAPMENT OF Aspergillus niger ON CHITOSAN BEADS AND ITS APPLICATION AS AN ADSORBENT FOR Cd (II) METAL IONS

Hasri¹, Mudasir², Nurul H. A², Roto²

¹Department of Chemistry, Faculty of Mathematics and Natural Sciences, Makassar State University, Parangtambung, Makassar, Indonesia

²Department of Chemistry, Faculty of Mathematics and Natural Sciences, Gadjah MadaUniversity, Sekip Utara, Yogyakarta, Indonesia,55281

*Corresponding author.tel/Fax : 0411-840295,email: hasriu@mail.ugm.ac.id, hasriu@yahoo.com

Abstract

Entrapment of Biomassa Aspergillus niger on Chitosan as natural adsorbent and its application for adsorption of Cd (II) metal ions in solution have been done. Entrapment process early by adding Aspegillus niger (AN) biomassa on chitosan gel  (Chi), and then it is formed  “beads” in alkali condition ( AN-CHI). FTIR was used for characterization both before and after entrapment. Adsorption of Cd(II) metal ions was done with batch method as function of pH, contact time and adsorption capacity. Concentration early 100 mgL-1 of Cd (II) metal ion is used for adsorption study. The results of research indicated that Cd metal adsorption optimum happened at pH of 7, contact time of 60 minutes with adsorpsi capacities 10mgL-1. Entrapment characterization showed that hydroxyl (-OH) and amino (- NH₂) functional groups  are believed to be responsible for the adsorption of Cd(II) ions by the adsorbent.

Keyword: Entrapment, Aspergillus niger, chitosan, adsorption, Cd(II) ion,