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A new adsorbent (egg-shell treated oil palm fronds (EG-OPF)) prepared from wastes was evaluated for methylene blue (MB) removal. Optimization among three significant variables (initial concentration (X 1 ), initial pH (X 2 ), and adsorbent dosage (X 3 )) were executed using response surface methodology (RSM). The most excellent performance was marked at X 1 = 291.7 mg/L, X 2 = pH 5, and X 3 = 1.82 g/L, with MB removal of 80.26 %. The kinetic study was fitted perfectly with the pseudo-second-order model (R 2 > 0.990), indicating the chemisorption process. The isotherm study was found to follow the Langmuir isotherm model (R 2 = 0.999), with maximal adsorption magnitude of 714.3 mg/g, implying the monolayer adsorption on a homogenous adsorbent surface. The reusability study affirmed the feasibility of EG-OPF in MB removal, credited to its excellent performance during reusability studies. The present study successfully discovered a new low-cost adsorbent (EG-OPF) for MB removal. Copyright © 2019 BCREC Group. All rights reserved

Egg-shell Treated Oil Palm Fronds (EG-OPF) as Low-Cost Adsorbent for Methylene Blue Removal