MALAYSIAN JOURNAL OF CHEMISTRY (MJChem)

MJChem is double-blind peer reviewed journal published by the Malaysian Institute of Chemistry (Institut Kimia Malaysia) E-ISSN: 2550-1658

Utilisation of Cationic Surfactant Modified Grated Coconut Residue for the Removal of Reactive Orange 16 Dye from Aqueous Solutions: A Fixed-Bed Column Study

Nor Syahirah Saidin
Universiti Teknologi MARA
Megat Ahmad Kamal Megat Hanafiah
Universiti Teknologi MARA Pahang
Is Fatimah
Universitas Islam Indonesia
Shahab Faisal Shaharuddin
Sentienx Sdn Bhd
Shariff Ibrahim
Universiti Teknologi MARA

DOI: https://doi.org/10.55373/mjchem.v24i2.150

Keywords: Adsorption; cetylpyridinium chloride; grated coconut; fixed-bed column; Yoon-Nelson model

Abstract

The use of shredded coconut residue as a new low-cost adsorbent for the removal of Reactive Orange 16 (RO16) dye was investigated. A continuous adsorption technique on a fixed-bed column was used to remove RO16 using an adsorbent produced from grated coconut residue that had been chemically treated with the cationic surfactant cetylpyridinium chloride (CPC). The raw grated coconut (RGC) and surfactant modified grated coconut (SMGC) were characterised by Fourier Transform Infrared (FTIR) spectrophotometry and Field Emission Scanning Electron Microscopy (FESEM). The FTIR spectra demonstrated CPC adherence to the SMGC, with two distinct peaks originating from CPC appearing at 2921 and 2853 cm-1. The FESEM image indicated that SMGC had an irregular and uneven surface. The column breakthrough investigation revealed that column characteristics such as adsorbent bed height and inlet dye flow rate impacted the results. Although breakthrough time increased with bed height, it was discovered that a higher initial dye input concentration and a quicker flow rate resulted in a shorter breakthrough time. The adsorption data were fitted to the Yoon-Nelson mathematical model for predicting breakthrough curves and timings. The findings of the Yoon-Nelson model for the 50% breakthrough time varied from 5.25 to 35.45 min. The results of this model agreed with the experimental data as the correlation coefficients, R2, for all three parameters were > 0.99. SMGC was thus found to be an efficient adsorbent for removing RO16 from aqueous solution.

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Published 15 June 2022


Issue Vol 24 No 2 (2022): Malaysian Journal of Chemistry

Section