Adsorptive Removal of Lead(II) ions from Aqueous Solutions Using Functionalized MOF-5 with Pyridine-2,6-dicarboxylic Acid
| dc.contributor.author | Ogundele, D.T, Adeyemi, D.A., Olayemi, V.T., Azeez, S.O., Abdul'rauf, L.B. | |
| dc.date.accessioned | 2025-10-21T13:04:05Z | |
| dc.date.available | 2025-10-21T13:04:05Z | |
| dc.date.issued | 2025-08-22 | |
| dc.description.abstract | Sulfonic acid, cyano and amine-functionalized MOF-5+ pyridine-2,6-dicarboxylic acid (PDC) were synthesized by Solvothermal method and characterized by X-ray Diffraction (XRD), Fourier Transform Infrared (FT-IR), and Scanning Electron Microscope (SEM) mapping analysis to confirm the synthesis of Metal-organic frameworks (MOFs) structures. The results of N2 adsorption/desorption isotherm data showed that the Brunauer-Emmett-Teller (BET) surface area of the synthesized MOF-5+PDC sample was 85.98 m2/g. The adsorption behaviour for Pb(II) ions revealed an excellent adsorption capacity of 42.5 – 57.25 mg/g, whereas the removal efficiency was over 80 - 90.9% when the initial concentration of Pb(II) ions was as low as 0.066 ppm. Design of Experimental was carried-out using Box-Behnken Design (BBD) based Response Surface Methodology (RSM) to optimize the adsorption reaction conditions at 10 – 100 mg/L for concentration, 4 – 10 for pH, and dosage of 0.01 – 0.05 g, in seventeen experimental procedures to achieve maximum adsorbed yield of Pb(II) ions. The results were within the range of 77.02 – 99.64 mg/g. The quadratic model was found to adequately predict the test amount adsorbed with an R2 value of 0.9054. In addition, thermodynamic analysis revealed that Pb(II) adsorption is a spontaneous endothermic process. Based on the data from the study, these amine-functionalized MOFs are a promising adsorbent for the removal of Pb(II) ions from contaminated water. | |
| dc.identifier.uri | http://www.unn.edu.ng/nigerian-research-journal-of-chemical-sciences/ | |
| dc.identifier.uri | https://kwasuspace.kwasu.edu.ng/handle/123456789/6042 | |
| dc.language.iso | en | |
| dc.publisher | University of Nigeria, Nsuka | |
| dc.relation.ispartofseries | 13; 2 | |
| dc.title | Adsorptive Removal of Lead(II) ions from Aqueous Solutions Using Functionalized MOF-5 with Pyridine-2,6-dicarboxylic Acid | |
| dc.type | Article |