Remediation of Iron (II) Ions from Wastewater Using Dicalcium Phosphate Chitosan Composites | ||
| Advances in Environmental and Life Sciences | ||
| Article 2, Volume 2, Issue 1, July 2022, Pages 18-31 PDF (8.78 M) | ||
| Document Type: Original research articles | ||
| DOI: 10.21608/aels.2022.131623.1012 | ||
| Authors | ||
| Abbas Mamdoh Abbas* ; Ayman Abd El-Moemen; Mohamed Zakaria; Zienb Mohamed Anwar | ||
| Chemistry Department, Faculty of Science, Suez Canal University, 41522 Ismailia, Egypt. | ||
| Abstract | ||
| Dicalcium phosphate (DCP) is used as an adsorbent. Two dicalcium phosphate chitosan composites (DCP-CS1) and (DCP-CS2) with different ratios of chitosan were prepared and used as adsorbents for removal of Fe2+ from wastewater. Different techniques were used for characterization the adsorbent compounds in the absence and presence Fe2+ such as X-ray diffraction analysis (XRD), Fourier Transform Infra-red spectroscopy (FTIR), Scanning electron microscope together with energy dispersive X-ray (SEM with EDX). The findings revealed that DCP crystals were mineralized in the presence of CS, and this confirmed that CS has a controlling role in the morphologies of DCP. Batch studies were conducted at initial Fe2+ ions concentration range of 50-250 mg/L,100 mg of adsorbent dose, pH range centered around 4.9, and 70-minutes contact time at 25.00 ± 1.00 oC. The adsorption kinetics was well-described by the pseudo-second-order kinetic, the intraparticle diffusion model was not a rate-limiting step, and the adsorption isotherms were fitted with Langmuir and Freundlich models. The maximal adsorption capacities (qm) for (DCP), (DCP-CS1) and (DCP-CS2) were 13.38, 14.96 and 19.79 mg g-1 for Fe2+ ions removal, respectively. Based on these findings, it can be concluded that DCP/CS composites can adsorb Fe2+ ions from aqueous solutions successfully due to functional groups such as phosphate, hydroxyl, and amino groups in their structure. | ||
| Keywords | ||
| Iron ions; adsorption; Chitosan; Kinetics; Isotherms | ||
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