Chitosan-silica- polyethylene Glycol (Ch/Si/P) Solid Membrane for Removal of Cu(II), Zn(II) and Cd(II) Ions from Aqueous Solutions | Chapter 4 | Challenges and Advances in Chemical Science Vol. 1

 Chitosan is thought to be an interesting raw material for membrane production because it has functional groups of –NH2 and –OH that are easily modified. The chitosan membrane has flaws such as low mechanical properties. To compensate for these flaws, silica is added during the chitosan membrane synthesis process to improve chitosan membrane stability. Plasticizer is used in the membrane synthesis process to improve mechanical properties, maintain integrality, and avoid holes and cracks. The addition of a polyethylene glycol plasticizer is expected to significantly increase the physical and mechanical properties, as well as the hydrophilic properties, of the membrane surface, allowing metal ion remedy to easily diffuse through the chitosan-silica-PEG membrane. In this study, chitosan-silica-PEG (Ch/Si/P) membrane synthesis is performed using tetraethyl orthosilicate (TEOS) as a silica source, and the membrane is then used as an adsorbent for the ions Cu(II), Zn(II), and Cd(II) by batch method. According to research, batch adsorption to all membranes has an optimum pH for metal ions Cu(II) and Zn(II) = 6, Cd(II) = 5.5. The adsorption of the ions Cu(II), Zn(II), and Cd(II) in membranes follows the Langmuir isotherm model. In general, the ability of the Ch membrane to adsorb all adsorption metal ions increases with the addition of silica or PEG. In order, the adsorption capacity values for the ions Cu(II), Zn(II), and Cd(II) for the Ch/Si/P membrane are 262, 183, and 107 mol/g. In general, in adsorption kinetic data, the coefficient score of R2 linearity is higher in the second order of the pseudo kinetic model.

Author (S) Details

F. W. Mahatmanti
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Semarang, 50229, Indonesia.

E. Kusumastuti
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Semarang, 50229, Indonesia.

W. D. P. Rengga
Department of Chemical Engineering, Faculty of Engineering, Universitas Negeri Semarang, 50229, Indonesia.

Nuryono
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, 55281, Indonesia.

D. Siswanta
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, 55281, Indonesia.

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