Acid-factionalized biomass material for methylene blue dye removal: a comprehensive adsorption and mechanism study

• Published in: Journal of Taibah University for Science Vol. 14; no. 1; pp. 305 - 313
• Main Authors: Jawad, Ali H., Abdulhameed, Ahmed Saud, Mastuli, Mohd Sufri
• Format: Journal Article
• Language: English
• Published: Taylor & Francis 01-01-2020; Taylor & Francis Group
• Subjects: adsorption mechanism; chemical activation; Coconut shell; methylene blue dye; sulphuric acid
• ISSN: 1658-3655; 1658-3655
• DOI: 10.1080/16583655.2020.1736767

Coconut (Cocos nucifera) shell was chemically treated with sulfuric acid (H2SO4) to produce acid- factionalized biosorbent for methylene blue (MB) dye removal from aqueous environment. Various analytical techniques were utilized to investigate the surface area, surface morphology, crystallinity, elemental composition, and functional group of the sulfuric acid-treated coconut shell (SATCS). The adsorption parameters such as adsorbent dosage (0.02-0.20 g), solution pH (3-10), contact time (0-360 min), and initial MB dye concentration (25-200 mg/L) were studied. The adsorption results were illustrated by pseudo-second order kinetic and Freundlich isotherm models. It was found that SATCS has a maximum adsorption capacity (q
max
) of 50.6 mg/g at 303 K. The adsorption mechanism of MB dye on the SATCS surface can be assigned to the various types of interactions such as electrostatic attractions, H-bonding interaction, and π-π interaction. This work shows SATCS as promising acid- factionalized biosorbent for removal MB dye.