Adsorptive removal of acridine orange dye by green tea/copper-activated carbon nanoparticles (Gt/Cu-AC np)

Abstract

Abstract Textile production is the rapidly growing industry in present days with dying as one of the most prominent operations involved. Dumping untreated wastewater from dye houses contaminate the local water bodies. Thus, dye removal is of great importance and recent applications using Green tea/Copper-Activated Carbon nano materials showed high dye adsorption ability. This work deals with the removal of acridine orange dye by using depleted green tea leaves and activated carbon, both in the form of nano sized particles combinedly as Green tea/Copper-Activated Carbon nanoparticles (Gt/Cu-AC np). These particles are characterized using SEM, XRD and FTIR analysis. The Experimental study for Adsorption of Acridine Orange Dye is carried out in batch process and concentration measurement is done by indirect measurement mode using UV Spectrophotometer at a wavelength of 400 nm range. Various parameters such as agitation time, agitation speed, Dosage of adsorbent (Gt/Cu-AC np), Initial concentration, and pH of acridine orange dye solution vs %Removal of acridine orange dye in solution is studied using plots, while maintaining other parameters constant when dealing with one. Using these plots different parameters are optimised to obtain 98% dye removal. Kinetics for acridine orange dye removal is studied and it is observed that the data best fits into pseudo second order kinetics. Adsorption Isotherm studies are carried out using Langmuir, Freundlich, and Temkin Adsorption isotherms, and it is observed that the experimental data follows a more likely Freundlich Adsorption Isotherm model with maximum adsorption capacity of 95.43 mg of Acridine orange adsorbed per gram of Green tea/Copper-Activated Carbon nanoparticles. (Gt/Cu-AC np).