Citric(C) and Chlorosulfonic(Ch) acid modified adsorbents prepared with raphia farinifera inflorescence (RFi) were evaluated for Cu2+ and Pb2+ ions removal from aqueous solution in batch procedure. Results showed that percentage removal of Pb2+ were 89.982% for C-RFi and 90.909% for Ch-RFi while Cu2+ were 86.782% for C-RFi and 83.973% for Ch-RFi respectively. Metal ion removal decreased with increase in concentration above 10 mg. Freundlich isotherm best described the uptake of metal ions with the new adsorbents. maximum monolayer adsorption capacity (qmax) was (68.144 for C-RFi-Pb2+, 59.09 for C-RFi-Cu2+ and 50.247 for Ch-RFi-Pb2+, 65.186 Ch-RFi-Cu2+) mg/g respectively. Pseudo second order with (R2 ≥ 0.995-0.999) best described the kinetics while Alovich, Avrami and Weber-Morris models suggests that multiple mechanism was involved in the adsorption process. Negative values for △Go and positive values of △Ho indicate spontaneity and endothermic nature of adsorption process, while the positive value of △S○ indicate increase disorderliness at the solid-liquid interface during adsorption. Physiosorption predominated in all the studied process, hence, desorption efficiency examined follows the order H2O>HCl>CH3COOH

Optimization and environmental remediation of heavy metals: kinetics and thermodynamic modeling

ACS Spring Meeting 2021

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.