Pengaruh Konsentrasi NaOH terhadap Isolasi dan Karakteristik FTIR Selulosa dari Sabut Kelapa The Effect of NaOH Concentration on the Isolation and FTIR Characteristics of Cellulose from Coconut Coir

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Page Numbers: 2895-2905
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Published: Sep 24, 2026
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Authors:
Sesti Wulandari1*, Sri Benti Etika2
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Sesti Wulandari
Universitas Negeri Padang
Sri Benti Etika
Universitas Negeri Padang

Abstract

Coconut coir is a lignocellulosic waste with potential as a source of cellulose for use as an adsorbent component. This study aimed to isolate cellulose from coconut coir and determine a suitable NaOH concentration for delignification based on yield and infrared spectral characteristics. Isolation involved prehydrolysis, delignification using 5%, 6%, and 7% NaOH, and bleaching. The yield of the isolated cellulose was calculated, and the cellulose was characterized using Fourier transform infrared spectroscopy (FTIR). The yields obtained with 5%, 6%, and 7% NaOH were 18.492%, 18.13%, and 17.3%, respectively. After treatment, the aromatic lignin C=C band at 1519.55 cm⁻¹ and the band at 1246.18 cm⁻¹ observed before treatment were no longer identified, whereas the O–H, C–H, and C–O/C–O–C groups remained identifiable. With 7% NaOH, a band at 899.09 cm⁻¹ associated with the β-glycosidic bonds of cellulose was also observed. Based on the observed FTIR characteristics, 7% NaOH was selected as the optimum concentration under the conditions of this study, despite producing the lowest yield. The isolated cellulose has potential for development as an adsorbent component for the treatment of dyes and heavy metals.

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How to Cite
Wulandari, S., & Etika, S. B. (2026). Pengaruh Konsentrasi NaOH terhadap Isolasi dan Karakteristik FTIR Selulosa dari Sabut Kelapa. MASALIQ, 6(5), 2895-2905. https://doi.org/10.58578/masaliq.v6i5.12155

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