Akademik Veri Yönetim Sistemi
RESEARCH ON CHEMICAL INTERMEDIATES, cilt.49, sa.5, ss.2155-2174, 2023 (SCI-Expanded)
Turkish coffee is a widely consumed product in Turkey and many other countries. In this study, the use of polymeric bio-waste (Turkish coffee waste (TCW)) as a polymeric adsorbent for the removal of methyl orange (MO) dye from the model aqueous solution without any pretreatment was investigated. The characterization of the bio-adsorbent was carried out by scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) and Fourier transform infrared spectroscopy (FTIR) tests. A bio-adsorption optimization study was carried out by using classic batch adsorption process. In addition, the isotherms, kinetics and thermodynamic adsorption studies were performed for methyl orange. In the adsorption studies, the effects of initial dye concentration (25-50-100-150-200 mg/L), solution pH (2-4-6-8-10), adsorbent dosage (0.25-0.5-1.0-1.5-2.0-3.0 g/L) and contact time (10-20-30-40-50-60-70 min) on dye removal were investigated. The highest MO removal of 98.52% was obtained with adsorbent dosage of 1.0 g/L when the dye concentration was 100 mg/L at pH value of 3. As a result of the adsorption isotherm and kinetic studies, the bio-adsorption values from models were found to be compatible with the Langmuir isotherm model and the pseudo-second-order kinetic model. According to the obtained thermodynamic data, it was determined that the bio-adsorption process took place spontaneously and exothermically. TCW was able to remove MO dye from model aqueous solutions by high recovery and without polluting the environment. This study is important in terms of reuse of the waste materials with high adsorption capacities.