Biosorption Studies of Cd2+ and Cr6+ from Aqueous Solution Using Cola-Nut Leaves as Low-Cost Biosorbent. (21st April 2020)

• Record Type: Journal Article
• Authors: Ibrahim, Z. H.; Faruruwa, M. D.
• Other Names: Morillo José Academic Editor.
• Is Part Of: Journal of chemistry. Volume 2020(2020)
• Publication Date: 2020-04-21
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1155/2020/6042398
• Languages: English
• ISSNs: 2090-9063

Abstract

Abstract : Cola-nut leaf is an agricultural waste which was used in this research as biosorbent for the adsorption of Cd 2+ and Cr 6+ from aqueous solutions. The leaves of cola nut were modified using 0.1 M HCl. Modified cola nut leaves biosorbent showed slightly higher percentage sorption than the unmodified leaves, for both heavy metals with increasing contact time, having greater affinity for Cd 2+ . The equilibrium sorption data was attained using the batch technique with increased pH (9) and increased adsorbent dose (1 g/25 cm 3 of adsorbate) and initial metal concentration. The functional group of cola nut leaves before and after adsorption was determined using Fourier Transform Infrared Spectroscopy (FTIR). Kinetics data were best fitted to a pseudo-second-order model. Equilibrium data were better described by the Temkin isotherm model with a multilayer adsorption capacity. The study showed that leaves of cola nut are a promising biosorbent for Cd 2+ and Cr 6+ which could be utilized for industrial wastewater remediation.