Removal of Lead and Iron from polluted water by adsorption on peanut shell adsorbent | ||
| Aswan University Journal of Environmental Studies | ||
| Article 7, Volume 6, Issue 2, June 2025, Pages 197-219 PDF (953.06 K) | ||
| Document Type: Original Research | ||
| DOI: 10.21608/aujes.2025.380878.1345 | ||
| Authors | ||
| Aya Mohamed Naguib* 1; Mohamed Nageeb Rashed2; Kassem A. S Mohammed3; Noura Sh. A Hagaggi4 | ||
| 1Natural resources- institute of african researches and studies - Aswan university - Aswan - Egypt | ||
| 2Chemistry Department, Faculty Of Science, Aswan University - Aswan - Egypt | ||
| 3Natural Resources Department, Institute of African and Nile States Researches and Studies, Aswan University - Aswan - Egypt | ||
| 4Botany Department, Faculty of science, Aswan University, Aswan, Egypt | ||
| Abstract | ||
| Due to their non-biodegradable and tendency to bioaccumulate, heavy metals pose a significant danger to aquatic ecosystems. The purpose of this study is preparation of peanutshell biosorbent and investigation of the efficacy of this adsorbent in the heavy metals ( Pb and Fe ) removal of from polluted water. The peanut shell adsorbent was prepared by 1- physical activation by calcination at 300ᵒC , 500ᵒC and 800ᵒC, 2- chemical activation by 1M HCl, H3PO4 and NaOH , and 3- physical activation followed by chemical activation. The adsorption test results for Pb and Fe showed that the adsorbent prepared by calcination at 800°C followed by chemical treatment with 1M NaOH showed higher Pb and Fe removal than with the other activators. The selected adsorbent was analyzed using XRD , SEM, EDX , BET, and FTIR. High removal efficiency of Pb ions adsorption were50 mg/l metal concentration, pH 5, solution temperature 323ᵒk, contact time 30 min, and 0.5g adsorbent dose, while that for Fe removal it was observed at 50 mg/l metal concentration, pH 5, temperature 303ᵒk, contact time 90 min, and 0.1 g of adsorbent. Adsorption of Pb and Fe ions were found to be well fit to Langmuir and Freundlich isotherms, and the pseudo second order kinetic model for both heavy metals . Pb and Fe adsorption on the prepared adsorbent was endothermic and spontaneous process . The resulted absorbent was successfully applied for the removal of Pb and Fe ions from water of Lake Nasser and Lake Nubia. | ||
| Keywords | ||
| heavy metals; adsorbent; peanutshells; pollution | ||
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