Adsorption of Toxic Methyl Violet 2B Dye from Aqueous Solution Using Artocarpus heterophyllus (Jackfruit) Seed as an Adsorbent
Muhammad Khairud Dahri
Chemical Sciences Programme, Universiti Brunei Darussalam, Jalan Tungku Link, Bandar Seri Begawan, BE 1410, Brunei
Muhammad Raziq Rahimi Kooh
Chemical Sciences Programme, Universiti Brunei Darussalam, Jalan Tungku Link, Bandar Seri Begawan, BE 1410, Brunei
Linda B. L. Lim *
Chemical Sciences Programme, Universiti Brunei Darussalam, Jalan Tungku Link, Bandar Seri Begawan, BE 1410, Brunei
*Author to whom correspondence should be addressed.
Abstract
The potential of Artocarpus heterophyllus (jackfruit) seed (JS) as an adsorbent to remove methyl violet 2B (MV) dye was investigated using batch experiment method. Surface morphology and functional groups of JS were analyzed in order to characterize the adsorbent. The adsorption experiments were carried out by varying the pH, dye concentration, contact time, ionic strength and temperature. Adsorption isotherm, kinetics and thermodynamics were also studied to further understand the adsorption process. Isotherm data was described using three isotherm models of which the Langmuir model best represent the experimental data with maximum adsorption capacity of 126.7 mg g-1. Pseudo 2nd order described the adsorption mechanism and intraparticle diffusion was not the rate limiting step. Regeneration studies showed that JS was able to maintain good adsorption of MV dye even after a few cycles.
Keywords: Artocarpus heterophyllus (jackfruit) seed, methyl violet dye, water remediation, electrostatic interaction, adsorption