Biogenic fabrication of ZnO@EC and MgO@EC using Eucalyptus leaf extract for the removal of hexavalent chromium Cr(VI) ions from water

Simple item page
dc.contributor.authorChauhan, Amit Kumar
dc.contributor.authorKataria, Navish
dc.contributor.authorGupta, Renuka
dc.contributor.authorGarg, Vinod Kumar
dc.date.accessioned2024-01-21T10:50:48Z
dc.date.accessioned2024-08-14T06:39:45Z
dc.date.available2024-01-21T10:50:48Z
dc.date.available2024-08-14T06:39:45Z
dc.date.issued2023-01-04T00:00:00
dc.description.abstractZinc and magnesium oxide nanoparticles were fabricated using green synthesis method for the sequestration of hexavalent chromium Cr(VI) from the aqueous medium. The biogenically prepared ZnO@EC and MgO@EC nanoparticles were successfully loaded on the Eucalyptus. The prepared nanomaterials were characterized using various techniques such as FESEM, TGA, XRD, EDX, FTIR, BET, and elemental mapping. FE-SEM analysis has revealed the surface morphology of ZnO nanoparticles, which were rod-like and spherical in shape, whereas MgO nanoparticles were of irregular shape. Batch mode was selected to remove the hexavalent chromium from aqueous solution using the prepared nanomaterials. The Cr(VI) adsorption was carried out under optimized conditions, viz., pH (3.0), adsorbent dose (0.05�g), contact time (150�min), temperature (25 � 2��C), and initial concentration (50�mg/L). The experimental results were compared using the different isotherm models; The observations have indicated that experimental data fit better with Freundlich (R2 = 0.99) and Langmuir (R2 = 0.99)�isotherms, respectively. The maximum adsorption capacity of ZnO@EC and MgO@EC for Cr(VI) was found to be 49.3 and 17.4�mg/g, respectively. The regeneration study of the adsorbents was conducted using different desorbing agents viz., ethanol, NaOH, and NaCl. The desorbing agent NaOH performed better and showed removal percentage of 34.24% and 20.18% for ZnO@EC and MgO@EC, respectively, after the three reusability cycles. The kinetics of reaction was assessed using the pseudo-first-order and pseudo-second-order kinetic models. The experimental data of both the nanomaterials ZnO@EC and MgO@EC obeyed pseudo-second-order model with correlation coefficient values 0.999 and 0.983, respectively. The thermodynamic study confirmed that adsorption was feasible, spontaneous, and endothermic. The adsorbents were tested for spiked real water which confirms their applicability and potential in real water systems also. The results indicated fair removal of chromium suggesting applicability of both adsorbents. � 2023, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.en_US
dc.identifier.doi10.1007/s11356-022-24967-6
dc.identifier.issn9441344
dc.identifier.urihttp://10.2.3.109/handle/32116/4020
dc.identifier.urlhttps://link.springer.com/10.1007/s11356-022-24967-6
dc.language.isoen_USen_US
dc.publisherSpringer Science and Business Media Deutschland GmbHen_US
dc.subjectAdsorptionen_US
dc.subjectEucalyptusen_US
dc.subjectHexavalent chromiumen_US
dc.subjectKineticsen_US
dc.subjectMgOen_US
dc.subjectNanocompositesen_US
dc.subjectZnOen_US
dc.titleBiogenic fabrication of ZnO@EC and MgO@EC using Eucalyptus leaf extract for the removal of hexavalent chromium Cr(VI) ions from wateren_US
dc.title.journalEnvironmental Science and Pollution Researchen_US
dc.typeArticleen_US
dc.type.accesstypeClosed Accessen_US

Files

Collections

Environmental Science And Technology - Research Publications