Economical and Eco-Friendly Adsorbent Derived from Coffee Waste for Efficient Adsorption of Methylene Blue: Characterization, Evaluation and Optimization Studies

Abstract

In this study, treated coffee ground wastes (CGW) was evaluated for adsorption of methylene blue (MB) from contaminated solution using contact time, initial dye concentrations, adsorbent dose, and solution temperature as operational factors. The adsorbent was treated using chemical activation with potassium carbonate (K2CO3), followed by thermomechanical treatment via an extrusion process. The characterization study of the adsorbent was conducted using Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) and X-ray fluorescence spectroscopy techniques. The adsorption equilibrium was reached after 30 min for MB and it was observed also that adsorption capacity decreased but percentage removal increased with increases in adsorbent mass. The maximum adsorption capacity of K2CO3-coffee powder was found to be 169.49 mg/g.

The Effectiveness of Coffee Waste Ground by Simple Washing on the Adsorption of Methylene Blue

“…4 showed the MB removal in contact time of 10 min. Furthermore, the adsorption was saturated in 30 min, which was similar to other observation which used natural material for adsorbent [9], [18]. The adsorption percentage for raw coffee and coffee waste ground were 90.01% and 96.98%, respectively.…”

“…Furthermore, the bands at 1635 and 1651 cm -1 showed the C=C vibration which contributed to the fatty acids, lipids, and to carbonyl stretching of lignin. The presence of bands at 1084 and 1064 cm -1 was due C-O and C-C stretching in polysaccharides i.e., cellulose and hemicellulose [9,17]. Effect of Contact Time.…”

“…Therefore, the further utilization of coffee waste is an important thing. The coffee waste, with a treatment or not, shows potential material to be a remarkable adsorbent [9]. The coffee waste is available to be simple and low-cost adsorbent in wastewater [10].…”

Treatment of textile effluent by using Burflower tree (Neolamarckia cadamba) leaf powder: Batch biosorption study

“…The rapid industrial growth has led to various dreadful impacts on the environment. Out of the world's total annual production of synthetic dyes, textile industries consume several million tonnes, constituting around 56% (Sulyman et al,2020) (Adegoke and Bello, 2015;Markandeya et al, 2017). In the textile industries, a large volume of water is required during various operations, which generates enormous amounts of wastewater containing remarkable amounts of unfixed dyes (Markandeya et al, 2017).…”