Efektivitas Fotodegradasi Lignin dari Limbah Ampas Sagu (Metroxylon sagu Rottb.) Menggunakan Katalis TiOâ‚‚: The Effectiveness of the Photodegradation of Lignin from Sago (Metroxylon sagu Rottb.) Waste Using TiOâ‚‚ Catalyst

Muh. Natsir; Aden Mula  Pratiwi; Thamrin Azis; Nohong; Imran; Wa Ode  Harlis; Alimin; La Ode  Kadidae; Ruslan; C Bijang; La Ode Abd Kadir; Laily  Nurliana

doi:10.22487/kovalen.2022.v8.i3.16149

Authors

Muh. Natsir Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Halu Oleo
Aden Mula Pratiwi Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Halu Oleo
Thamrin Azis
Nohong Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Halu Oleo
Imran Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Halu Oleo
Wa Ode Harlis Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Halu Oleo
Alimin Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Halu Oleo
La Ode Kadidae Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Halu Oleo
Ruslan Department of Chemistry, Faculty of Mathematics and Natural Sciences, Tadulako University
C Bijang Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Patimura
La Ode Abd Kadir Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Halu Oleo
Laily Nurliana Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Halu Oleo

DOI:

https://doi.org/10.22487/kovalen.2022.v8.i3.16149

Abstract

Lignin degradation from sago (Metroxylon sagu Rottb.) waste has been carried out using a TiO₂ catalyst. This research aims to determine the effectiveness of lignin degradation from sago waste using a TiO₂ catalyst. Lignin from sago pulp was isolated using 10% NaOH and characterized using Fourier Transform Infra Red (FTIR) spectroscopy. The results of the characterization using FTIR show that the absorption at wave number 2937.59 cm^-1 is the -C-H stretching vibration of the alkane functional groups, the absorption at wave number 2360.87 cm^-1 is the vibration of the Câ‰¡C triple bond, the wave numbers 1795.73 cm^-1 and 1637.56 cm^-1 are associated with the stretching of the carbonyl group. The absorption at wave number 1427.32 cm^-1 is a C-H vibration connected to an unsaturated bond in an aromatic ring. Absorptions at wave number 1105.21 cm^-1, 1128.36 cm^-1, 1153.43 cm^-1 were the stretching vibration of -C-H on the guaiasil ring, and the absorption at wave number 1022.27 cm^-1 was the stretching vibration of C-O-C ether. From this spectrum, it can be seen that lignin is not completely pure because it is probably still mixed with cellulose. The results of the effectiveness test of lignin degradation using a TiO₂ catalyst with the help of UV light were able to degrade the lignin isolated by 31.43%, for 3 hours at a lignin concentration of 40 ppm.