Abstract
This work describes the development and testing of activated carbon (AC) made from orange peels, which is effective at removing methyl red (MR) from aqueous solutions, and thus provides a solution to this problem. Adsorbents made in the laboratory can be characterized by their bulk density, particle size, surface area, and proximate analysis. The surface area of the prepared adsorbent was 512.2 m(2)g(-1). Standard procedures such as XRD, SEM, and FTIR analysis are also used to characterize prepared orange peel AC. Adsorbent dosage (0.25-1.25 g/L), MR concentration (100-400 mg/L), temperature (40-60 degrees C), contact time (10-60 min), and pH (3-11) were all examined in this experiment. At an amount of adsorbent of 1 g/L adsorbent, MR concentration of 100 mg/L, and a pH of 11, maximum adsorption has been observed. In order to analyze the results, adsorption models such as the Langmuir and Freundlich were applied. At 60 degrees C, the adsorption isotherm was found to fit the Langmuir model with 111.11 mg/g. The linear regression correlation coefficient, the R-2 value is 0.999. Analytical results showed that MR could be effectively removed by using AC made from waste orange peels as an adsorbent. HIGHLIGHTS
Orange peel activated carbon (AC) prepared from waste orange peels by carbonization and chemical activation method. Potential use of prepared orange peels AC for MR dye removal. Absorption process of orange peels AC fits Langmuir and Freundlich isotherms. Adsorption of MR on orange peels AC and commercial AC was compared. Adsorption of MR dye using orange peels AC is an efficient approach.