Removal of Congo Red from Aqueous Solutions Using Fly Ash Modified with Hydrochloric Acid
Ebelegi Newton Augustus, Angaye Seimokumo Samuel, Ayawei Nimibofa, Wankasi Donbebe
Current Journal of Applied Science and Technology · pp. 1–7 · Published 26 Apr 2017
10.9734/BJAST/2017/29880Abstract
The adsorption of Congo Red dye onto fly ash modified with various concentrations of Hydrochloric acid (HCFA-4,HCFA-3,HCFA-2 and HCFA-1)was studied. The effect of contact time and concentration were investigated using a batch adsorption technique. The experimental data fits well with the Freundlich isotherm due to high correlation coefficients and this may be attributed to heterogeneous distribution of active sites and multilayer adsorption, while the dynamic data is best described by the pseudo-second-order kinetic model which suggests that Congo Red adsorption onto fly ash modified with Hydrochloric acid appeared to be controlled by a chemisorption process. Fly ash modified with 2 M Hydrochloric acid HCFA-2 exhibited the highest adsorption capacity (KF=7.82) followed by HCFA-3 (KF = 0.74), HCFA (KF = 0.069) and HCFA-1 had the least adsorption capacity (KF =0.004). Adsorption of Congo Red dye onto fly ash modified with various concentration of Hydrochloric acid was spontaneous since Gibbs free energy of adsorption was negative in all cases.
Cited by 14
Ramsenthil Ramadoss, Durai Gunasekaran, Dhanasekaran Subramanian · Progress in Microalgae Research - A Path for Shaping Sustainable Futures · 2022
Ramsenthil Ramadoss, Dhanasekaran Subramaniam · Separation Science and Technology · 2018
Aseel M. Aljeboree, Asawer A. Mhammed, Shamaa Essa · Iranian Polymer Journal · 2026
Aseel M. Aljeboree, Uday Abdul-Reda Hussein, Ayad F. Alkaim · Polymer Bulletin · 2025
Related research
- Mitigation Option for GHG Emission from Wetland Rice Cultivation — shares topic coverage
- Synthesis of TiO2@ Activated Bagasse Fly Ash Nanocomposite as a Photocatalyst for Removal of Dyes and Heavy Metals from Wastewater — shares topic coverage
- Surface Modification of Fly Ash by Thermal Activation: A DR/FTIR Study — shares topic coverage
- Effects of Activation and Modification on the Microstructure and Composition of Fly Ash — shares topic coverage
- Tribological Aspects of Thermally Sprayed Red Mud-Fly Ash and Red Mud-Al Coatings on Mild Steel — shares topic coverage
Article metrics
Real usage data collected on this platform.
25
Page views
0
PDF downloads
1
Outbound clicks
14
Citations
Views over time
Views by country
Approximate, from request IP at view time — not citizenship or institution. Countries with fewer than 5 views are grouped as "Other".
Traffic sources
Referring site, by host.
Views and downloads exclude known bots/crawlers. Citations combines this platform's own DOI-resolved index with each external source's own reported total — see Cited by above for individually listed citing works. Last refreshed 0 seconds ago.