Abstract
As a result of industrial development water pollution has become a major issue. Providing clean water of sufficient quality and quantity is essential. According to literature, 100 000 different dyes are used worldwide in the printing, food and textile industries. Remazol Brilliant Violet-5R belongs to the group of azo dyes used in the textile industry. The purpose of this paper is to study the removal of anionic dye RBV-5R using calcined eggshell. We investigated the effect of initial dye concentration (20-100 mg/L RBV-5R), biomass amount, contact time, temperature, and pH on the adsorption process. We calculated the amounts of adsorbed material in equilibrium and the efficiency of the adsorption process. Various studies were performed on the adsorption process and the adsorbent morphology (EDX, SEM, FTIR, Raman), as well as isotherm (Langmuir, Freundlich, Temkin and Dubinin-Radushkevich), kinetic and diffusion models were used to characterize the process. Calcined eggshell was also characterized by thermogravimetric, BET surface methods. Based on the results obtained, it can be said that the calcined eggshell can be used effectively to remove the dye from the aqueous solution.
Highlights
Water is the source of life, our existence, and our civilization depends to a great extent on the presence of good quality water.[1]
We investigated the effect of initial dye concentration (20–100 mg/L RBV-5R), biomass amount, contact time, temperature, and pH on the adsorption process
The aim of this study is to investigate the removal of Remazol Brilliant Violet-5R dye from aqueous solutions using calcined chicken (Gallus Gallus domesticus) eggshell household waste as biosorbent
Summary
Water is the source of life, our existence, and our civilization depends to a great extent on the presence of good quality water.[1]. The population of Cape Town can use 50 liters of water per day. In Brazil’s most populous city (São Paulo), water was pumped out of sludge in 2015, since it was enough only for 20 days for the population.[4,5,6] Humanity has used materials since ancient times that are capable of staining other materials, initially working with natural colors of animal and vegetable origin. Reactive dyes are typically anionic in nature, highly soluble in water, and resistant to light.[7] RBV5R is often used as a starting material in the manufacturing process of polymer dyes.[8] In residual industrial wastewater, reactive dyes are highly toxic, characterized by a high
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