Enhanced capacity of fluoride scavenging from contaminated water by nano-architectural reorientation of cerium-incorporated hydrous iron oxide with graphene oxide
- 34 Downloads
An in situ wet chemical deposition method has been applied for the successful surface modification of Ce (IV)-incorporated hydrous Fe(III) oxide (CIHFO) with a hydrophilic graphene precursor, graphene oxide (GO). The surface area of as-prepared composite (GO-CIHFO) has enhanced (189.57 m2 g−1) compared with that of pristine CIHFO (140.711 m2 g−1) and has irregular surface morphology consisting of microcrystals (~ 2–3 nm) and mesoporous (3.5486 nm) structure. The GO-CIHFO composite shows enhanced fluoride scavenging capacity (136.24 mg F g−1) than GO (3 mg F g−1) and pristine CIHFO (32.62 mg F g−1) at pH 7.0. Also, in acidic pH range and at 323 K temperature, the Langmuir capacity of as-prepared composite is 190.61 mg F g−1. It has been observed that fluoride removal by GO–CIHFO occurs from solutions obeying pseudo-second-order kinetics and multilayer adsorption process. The film/boundary layer diffusion process is also the rate-determining step. The nature of the adsorption reaction is reasonably spontaneous and endothermic in thermodynamic sense. It was observed that 1.2 g.L−1 of GO-CIHFO dosage can effectively optimise the fluoride level of natural groundwater samples (9.05 mg L−1) to the desirable permissible limit. Reactivation of used material up to a level of 73.77% with a solution of alkaline pH has proposed reusability of nanocomposites ensuring sustainability of the proposed material as fluoride scavenger in future.
KeywordsIron–cerium oxide Graphene oxide Fluoride Field validation Reusable
The authors are grateful to the Department of Geology and also to the Department of Chemistry including the Authority of Presidency University, Kolkata, India, for providing the laboratory facility for carry out this work. The author (K. M.) is grateful to the Department of Science and Technology (DST), Govt. of India, for providing the financial support in the form of a Woman Scientist-B (DST/Disha/SoRF-PM/064/2013/C dated 14/09/2015). P.S. is thankful to Presidency University for the financial support through a FRPDF grant.
- Alagumuthu G, Rajan M (2008) Monitoring of fluoride concentration in ground water of Kadayam block of Tirunelveli district, India. Rasayan J Chem 1:920–928Google Scholar
- Basu T, Ghosh UC (2013) Nano-structured iron(III)–cerium(IV) mixed oxide: Synthesis, characterization and arsenic sorption kinetics in the presence of co-existing ions aiming to apply for high arsenic groundwater treatment. Appl Surf Sci 283:471–481. https://doi.org/10.1016/j.apsusc.2013.06.132 CrossRefGoogle Scholar
- Briggs D (ed) (1978) Handbook of x-ray and ultraviolet photoelectron spectroscopy. Heyden, London [usw.], RheineGoogle Scholar
- Dubinin MM, Radushkevich LV (1947) The Equation of the Characteristic Curve of Activated Charcoal. Proc Acad Sci USSR Phys Chem Sect 55:331–337Google Scholar
- Freundlich HMF (1906) Over the Adsorption in Solution. Z Phys Chem 57:385–470Google Scholar
- Mohan S, Kumar V, Singh DK, Hasan SH (2016a) Synthesis and characterization of rGO/ZrO 2 nanocomposite for enhanced removal of fluoride from water: kinetics, isotherm, and thermodynamic modeling and its adsorption mechanism. RSC Adv 6:87523–87538. https://doi.org/10.1039/C6RA15460C CrossRefGoogle Scholar
- Mohan S, Kumar V, Singh DK, Hasan SH (2016b) Synthesis and characterization of rGO/ZrO 2 nanocomposite for enhanced removal of fluoride from water: kinetics, isotherm, and thermodynamic modeling and its adsorption mechanism. RSC Adv 6:87523–87538. https://doi.org/10.1039/C6RA15460C CrossRefGoogle Scholar
- Podder MS, Majumder CB (2016) Application of granular activated carbon/MnFe2O4 composite immobilized on C. glutamicum MTCC 2745 to remove As(III) and As(V): Kinetic, mechanistic and thermodynamic studies. Spectrochim Acta A Mol Biomol Spectrosc 153:298–314. https://doi.org/10.1016/j.saa.2015.08.022 CrossRefGoogle Scholar
- Zhang K, Wu S, Wang X, He J, Sun B, Jia Y, Luo T, Meng F, Jin Z, Lin D, Shen W, Kong L, Liu J (2015) Wide pH range for fluoride removal from water by MHS-MgO/MgCO3 adsorbent: Kinetic, thermodynamic and mechanism studies. J Colloid Interface Sci 446:194–202. https://doi.org/10.1016/j.jcis.2015.01.049 CrossRefGoogle Scholar