Performance of eggshells powder as an adsorbent for adsorption of hexavalent chromium and cadmium from wastewater
Document Type
Article
Publication Date
11-13-2020
Abstract
This study explores the kinetic and equilibrium performance of eggshell as an adsorbent for hexavalent chromium and cadmium ion removal from wastewater. The experimental removal of the two metal ions was performed batch-wise and the influence of variables like initial metal loading, pH, contact time, and adsorbent dose. Fourier-transform infrared spectroscopy spectra reveals that chromium and cadmium ion interact with carbonyl, carboxylic, hydroxyl functional groups in eggshell. The best pH is 6, and the adsorption capacity improves with increasing initial concentration of adsorbate, pH, contact time and adsorbent dosage for chromium and cadmium ion. Pseudo-second-order kinetics is the most suitable model for the removal of chromium and cadmium ion, while the equilibrium agrees with Freundlich isotherms. These outcomes reveal that eggshell is a promising cheap adsorbent for adsorption of toxic heavy metals like chromium and cadmium ion from aqueous solution.
Keywords
Eggshell, Adsorption, Kinetics, Hexavalent chromium, Divalent cadmium
Divisions
sch_che
Funders
Deanship of Scientific Research (DSR), King Abdulaziz University, Jeddah
Publication Title
SN Applied Sciences
Volume
2
Issue
12
Publisher
Springer International Publishing Ag
Publisher Location
GEWERBESTRASSE 11, CHAM, CH-6330, SWITZERLAND