Adsorption and Release of Ibuprofen from Silica-Carbon Composites based on Rice Husks (Oryza Sativa) and Banana Peels (Musa Acuminata) 

Wara Dyah Pita Rengga1,#,Email

Nadya Alfa Cahaya Imani1,#

Nanik Wijayati2,#

Tohiran Tohiran1,#

Widya Hary Cahyati3,#

Doni Saputra1,#

1Chemical Engineering Department, Faculty of Engineering, Universitas Negeri Semarang, Sekaran Campus, Gunungpati, Semarang 50229, Indonesia
2Chemistry Department, Faculty of Science and Mathematics, Universitas Negeri Semarang, Sekaran Campus, Gunungpati, Semarang 50229, Indonesia
3Public Health Department, Faculty of Sport Science, Universitas Negeri Semarang, Sekaran Campus, Gunungpati, Semarang 50229, Indonesia
#These authors contributed equally to this work

Abstract

This study combines silica and carbon into a composite as a controlled drug carrier for ibuprofen. The silica source came from rice husks and carbon from the kepok banana peel because both materials are biomass waste, easy to obtain, and abundant. The synthesis of silica-carbon composites was carried out by a pyrolysis process combining the two materials with some variations of mass ratio between rice husk and banana peel charcoal (1:1, 3:1, 5:1), pyrolysis temperature (500, 600, 700 oC), and pyrolysis time (1,5; 2,0; 2,5 hours). The silica-carbon composites were subjected to the ibuprofen adsorption test with the impregnation method at different concentrations (100, 500, 1000, 1500, 2000 mg/L) and the ibuprofen release test using Phosphate Buffer Saline (PBS) solution. The results showed that the silica-carbon composite sample with the largest adsorption capacity of ibuprofen was R5S7W2,5, which was synthesized at a mass ratio of 5:1 for rice husks and banana peels, pyrolysis temperature at 700 oC, and pyrolysis time of 150 minutes. The most well-fitted equilibrium model to use is Freundlich (R2 mean 0.961), with a maximum ibuprofen adsorption capacity of 176.778 mg/g, relative adsorption constant of 19.430 L/g, an adsorption heat constant of 25.768 J/mol, and adsorption energy constant of 0.046 mol2/kJ2

Adsorption and Release of Ibuprofen from Silica-Carbon Composites based on Rice Husks (Oryza Sativa) and Banana Peels (Musa Acuminata)