1
|
Li B, Xu C, Yu D, Qi Z, Wang Y, Peng Y. Enhanced phosphate remediation of contaminated natural water by magnetic zeolitic imidazolate framework-8@engineering nanomaterials (ZIF8@ENMs). J Colloid Interface Sci 2022; 613:71-83. [PMID: 35032778 DOI: 10.1016/j.jcis.2022.01.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 12/22/2021] [Accepted: 01/01/2022] [Indexed: 10/19/2022]
Abstract
The efficient enrichment and reutilization of phosphate from natural water still remains a daunting challenge to satisfy the increasingly stringent phosphate discharge criteria. In response to this problem, the presented study successfully synthesizes a series of magnetic zeolitic imidazolate framework-8@engineering nanomaterials (ZIF8@ENMs) via a two-step hydrothermal and coprecipitation method by facilely growing ZIF8 and/or Fe3O4 on various functional ENMs. Structure morphology, chemical composition and hysteresis curve characterizations demonstrate the successful formation of magnetic Fe3O4-ZIF8@ENM. Amongst the prepared magnetic ZIF8@ENMs hybrids, the Fe3O4-ZIF8@ENMs possessing massive hydroxyl groups is demonstrated to harvest the maximum adsorption capacity of 441.7 mg g-1 under neutral condition. Such-acquired adsorption capacity evidently surpass state-of-the-art adsorbents. Systematic assessment of the chemical condition effects on phosphate removal, revealing its conspicuous merits of robust pH independence (94.63-98.20%), high selectivity pinpointing phosphate within complex cations, ease-of-separation and satisfactory recycle. The outstanding performance of magnetic ZIF8@ENMs are mainly derived from the formed strong ZnOP, FeOP and electrostatic interactions between phosphate and adsorbents. Along this line, designing magnetic MOFs-based hybrids towards phosphate are anticipated to be promising avenues for advanced treatment of phosphate-like contaminants and efficient recycle in practical applications.
Collapse
Affiliation(s)
- Beibei Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Conglei Xu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Danning Yu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Ziyuan Qi
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China
| | - Yifei Wang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China.
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China
| |
Collapse
|
2
|
Yang Z, Wu G, Li Q, Ai H, Yao X, Ji H. Immobilization of β-CD on a Hyper-Crosslinked Polymer for the Enhanced Removal of Amines from Aqueous Solutions. Polymers (Basel) 2020; 12:polym12071620. [PMID: 32708194 PMCID: PMC7408518 DOI: 10.3390/polym12071620] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 07/15/2020] [Accepted: 07/16/2020] [Indexed: 12/02/2022] Open
Abstract
In this paper, we adopted a simple and efficient strategy to prepare a β-cyclodextrin (β-CD)-modified hyper-crosslinked polymer (CDM-HCP). The structures and physicochemical properties of the as-synthesized polymer were also evaluated. It was applied to the removal of anilines from aqueous solutions. The introduction of β-CD into the hyper-crosslinked polymer significantly enhanced adsorption properties for the removal of various amines. The adsorption kinetics agreed with the pseudo-second-order mode very well. The adsorption isotherm data of p-methylaniline (p-MA) and p-aminobenzoic acid (p-ABC) were in agreement with the Langmuir isotherm, whereas aniline and p-chloroaniline (p-CA) were fitted best with the Freundlich model. The maximum adsorption capacities (qmax) determined by adsorption isotherms were 148.97 mg/g for aniline, 198.45 mg/g for p-MA, 293.71 mg/g for p-CA, and 622.91 mg/g for p-ABC, respectively. It had higher adsorption capacities than those of some commercial polymeric resins, such as XAD-4, PA66, and AB-8. The interaction mechanism was investigated by FTIR, XPS, and the ONIOM2 method. A CDM-HCP can be regenerated efficiently and used repeatedly, indicating its potential technological applications in removing organic pollutants from actual industrial effluents.
Collapse
Affiliation(s)
- Zujin Yang
- School of Chemical Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, China; (G.W.); (Q.L.)
- School of Chemical Engineering, Huizhou Research Institute of Sun Yat-Sen University, Huizhou 516216, China
- Correspondence: (Z.Y.); (H.J.)
| | - Guifang Wu
- School of Chemical Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, China; (G.W.); (Q.L.)
| | - Qiuru Li
- School of Chemical Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, China; (G.W.); (Q.L.)
| | - Hongxia Ai
- Fine Chemical Industry Research Institute, The Key Laboratory of Low-carbon Chemistry & Energy Conservation of Guangdong Province, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China;
| | - Xingdong Yao
- The Key laboratory of Forest Chemistry & Engineering of Guangxi, Guangxi University for Nationalities, Nanning 210000, China;
| | - Hongbing Ji
- School of Chemical Engineering, Huizhou Research Institute of Sun Yat-Sen University, Huizhou 516216, China
- Fine Chemical Industry Research Institute, The Key Laboratory of Low-carbon Chemistry & Energy Conservation of Guangdong Province, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China;
- School of Chemical Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, China
- Correspondence: (Z.Y.); (H.J.)
| |
Collapse
|
3
|
Donaldson FP, Ashenafi EL, Nyman MC. Time and pH-dependent uptake of benzidine by XAD-4 hydrophobic resin. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.123669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
4
|
Gangemi CMA, Iudici M, Spitaleri L, Randazzo R, Gaeta M, D’Urso A, Gulino A, Purrello R, Fragalà ME. Polyethersulfone Mats Functionalized with Porphyrin for Removal of Para-nitroaniline from Aqueous Solution. Molecules 2019; 24:molecules24183344. [PMID: 31540076 PMCID: PMC6766941 DOI: 10.3390/molecules24183344] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 09/09/2019] [Accepted: 09/10/2019] [Indexed: 02/07/2023] Open
Abstract
The dispersion of para-nitroaniline (p-NA) in water poses a threat to the environment and human health. Therefore, the development of functional adsorbents to remove this harmful compound is crucial to the implementation of wastewater purification strategies, and electrospun mats represent a versatile and cost-effective class of materials that are useful for this application. In the present study, we tested the ability of some polyethersulfone (PES) nanofibers containing adsorbed porphyrin molecules to remove p-NA from water. The functional mats in this study were obtained by two different approaches based on fiber impregnation or doping. In particular, meso-tetraphenyl porphyrin (H2TPP) or zinc(II) meso-tetraphenyl porphyrin (ZnTPP) were immobilized on the surface of PES fiber mats by dip-coating or added to the PES electrospun solution to obtain porphyrin-doped PES mats. The presence of porphyrins on the fiber surfaces was confirmed by UV–Vis spectroscopy, fluorescence measurements, and XPS analysis. p-NA removal from water solutions was spectrophotometrically detected and evaluated.
Collapse
Affiliation(s)
- Chiara Maria Antonietta Gangemi
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, Viale A. Doria, 6-95100 Catania, Italy; (C.M.A.G.); (M.I.); (L.S.); (R.R.); (M.G.); (A.G.); (R.P.)
| | - Mario Iudici
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, Viale A. Doria, 6-95100 Catania, Italy; (C.M.A.G.); (M.I.); (L.S.); (R.R.); (M.G.); (A.G.); (R.P.)
| | - Luca Spitaleri
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, Viale A. Doria, 6-95100 Catania, Italy; (C.M.A.G.); (M.I.); (L.S.); (R.R.); (M.G.); (A.G.); (R.P.)
- INSTM UdR of Catania, Viale A. Doria, 6-95125 Catania, Italy
| | - Rosalba Randazzo
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, Viale A. Doria, 6-95100 Catania, Italy; (C.M.A.G.); (M.I.); (L.S.); (R.R.); (M.G.); (A.G.); (R.P.)
| | - Massimiliano Gaeta
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, Viale A. Doria, 6-95100 Catania, Italy; (C.M.A.G.); (M.I.); (L.S.); (R.R.); (M.G.); (A.G.); (R.P.)
| | - Alessandro D’Urso
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, Viale A. Doria, 6-95100 Catania, Italy; (C.M.A.G.); (M.I.); (L.S.); (R.R.); (M.G.); (A.G.); (R.P.)
| | - Antonino Gulino
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, Viale A. Doria, 6-95100 Catania, Italy; (C.M.A.G.); (M.I.); (L.S.); (R.R.); (M.G.); (A.G.); (R.P.)
- INSTM UdR of Catania, Viale A. Doria, 6-95125 Catania, Italy
| | - Roberto Purrello
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, Viale A. Doria, 6-95100 Catania, Italy; (C.M.A.G.); (M.I.); (L.S.); (R.R.); (M.G.); (A.G.); (R.P.)
| | - Maria Elena Fragalà
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, Viale A. Doria, 6-95100 Catania, Italy; (C.M.A.G.); (M.I.); (L.S.); (R.R.); (M.G.); (A.G.); (R.P.)
- INSTM UdR of Catania, Viale A. Doria, 6-95125 Catania, Italy
- Correspondence: ; Tel.: +390957385149
| |
Collapse
|
5
|
Koyuncu H, Kul AR. Removal of aniline from aqueous solution by activated kaolinite: Kinetic, equilibrium and thermodynamic studies. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.02.057] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
6
|
Archana V, Meera S. Begum K, Anantharaman N. Studies on removal of phenol using ionic liquid immobilized polymeric micro-capsules. ARAB J CHEM 2016. [DOI: 10.1016/j.arabjc.2013.03.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
|
7
|
Pereira L, Mondal PK, Alves M. Aromatic Amines Sources, Environmental Impact and Remediation. POLLUTANTS IN BUILDINGS, WATER AND LIVING ORGANISMS 2015. [DOI: 10.1007/978-3-319-19276-5_7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
8
|
Santos MPS, Rodrigues AE. Adsorption Equilibrium and Fixed Bed Adsorption of Aniline onto Polymeric Resin and Activated Carbons. SEP SCI TECHNOL 2014. [DOI: 10.1080/01496395.2013.852226] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
9
|
Yang X, Guan Q, Li W. Effect of template in MCM-41 on the adsorption of aniline from aqueous solution. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2011; 92:2939-2943. [PMID: 21813231 DOI: 10.1016/j.jenvman.2011.07.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2010] [Revised: 06/24/2011] [Accepted: 07/08/2011] [Indexed: 05/31/2023]
Abstract
The effect of the surfactant template cetyltrimethylammonium bromide (CTAB) in MCM-41 on the adsorption of aniline was investigated. Various MCM-41 samples were prepared by controlling template removal using an extraction method. The samples were then used as adsorbents for the removal of aniline from aqueous solution. The results showed that the MCM-41 samples with the template partially removed (denoted as C-MCM-41) exhibited better adsorption performance than MCM-41 with the template completely removed (denoted as MCM-41). The reason for this difference may be that the C-MCM-41 samples had stronger hydrophobic properties and selectivity for aniline because of the presence of the template. The porosity and cationic sites generated by the template play an important role in the adsorption process. The optimal adsorbent with moderate template was achieved by changing the ratio of extractant; it has the potential for promising applications in the field of water pollution control.
Collapse
Affiliation(s)
- Xinxin Yang
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, China
| | | | | |
Collapse
|
10
|
Adsorption behavior of phenolic compounds onto polymeric adsorbents modified with 2-carboxybenzoyl groups. CHINESE JOURNAL OF POLYMER SCIENCE 2010. [DOI: 10.1007/s10118-010-8249-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
11
|
Guo L, Li G, Liu J, Yin P, Li Q. Adsorption of Aniline on Cross-Linked Starch Sulfate from Aqueous Solution. Ind Eng Chem Res 2009. [DOI: 10.1021/ie9010782] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lei Guo
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Guiying Li
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Junshen Liu
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Ping Yin
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Qian Li
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| |
Collapse
|
12
|
Viswanathan N, Meenakshi S. Role of metal ion incorporation in ion exchange resin on the selectivity of fluoride. JOURNAL OF HAZARDOUS MATERIALS 2009; 162:920-930. [PMID: 18619734 DOI: 10.1016/j.jhazmat.2008.05.118] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2007] [Revised: 05/24/2008] [Accepted: 05/26/2008] [Indexed: 05/26/2023]
Abstract
Indion FR 10 resin has sulphonic acid functional group (H(+) form) possesses appreciable defluoridation capacity (DC) and its DC has been enhanced by chemical modification into Na(+) and Al(3+) forms by loading respective metal ions in H(+) form of resin. The DCs of Na(+) and Al(3+) forms were found to be 445 and 478 mg F(-)/kg, respectively, whereas the DC of H(+) form is 265 mg F(-)/kg at 10 mg/L initial fluoride concentration. The nature and morphology of sorbents are characterized using FTIR and SEM analysis. The fluoride sorption was explained using the Freundlich, Langmuir and Redlich-Peterson isotherms and kinetic models. The calculated thermodynamic parameters such as DeltaG degrees, DeltaH degrees, DeltaS degrees and sticking probability (S(*)) explains the nature of sorption. Comparison was also made by the elution capacity of these resins in order to select a cost effective material. A field trial was carried out to test the suitability of the resins with fluoride water collected from a nearby fluoride-endemic area.
Collapse
|
13
|
Zhang L, Li A, Wang J, Lu Y, Zhou Y. A novel aminated polymeric adsorbent for removing refractory dissolved organic matter from landfill leachate treatment plant. J Environ Sci (China) 2009; 21:1089-1095. [PMID: 19862922 DOI: 10.1016/s1001-0742(08)62386-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Refractory dissolved organic matter (DOM) from landfill leachate treatment plant was with high dissolved organic carbon (DOC) content. An aminated polymeric adsorbent NDA-8 with tertiary amino groups and sufficient mesopore was synthesized, which exhibited high adsorption capacity to the DOM (raw water after coagulation). Resin NDA-8 performed better in the uptake of the DOM than resin DAX-8 and A100. Electrostatic attraction was considered as the decisive interaction between the adsorbent and adsorbate. Special attention was paid to the correlation between porous structure and adsorption capacity. The mesopore of NDA-8 played a crucial role during uptake of the DOM. In general, resin in chloride form performed a higher removal rate of DOC. According to the column adsorption test, total adsorption capacity of NDA-8 was calculated to 52.28 mg DOC/mL wet resin. 0.2 mol/L sodium hydroxide solution could regenerate the adsorbent efficiently.
Collapse
Affiliation(s)
- Long Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, China.
| | | | | | | | | |
Collapse
|
14
|
ADSORPTION MECHANISM OF TOXIC ORGANIC COMPOUNDS IN CHEMICAL WASTEWATER BY POLYMERIC ADSORBENTS. ACTA POLYM SIN 2008. [DOI: 10.3724/sp.j.1105.2008.00651] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
15
|
|
16
|
Thamtharai P, Rangsunvigit P, Malakul P, Scamehorn JF. Surfactant‐Enhanced Regeneration of Polymeric Resin in a Vapor‐Phase Application. SEP SCI TECHNOL 2007. [DOI: 10.1080/01496390701588976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
17
|
Zheng K, Pan B, Zhang Q, Han Y, Zhang W, Pan B, Xu Z, Zhang Q, Du W, Zhang Q. Enhanced removal of p-chloroaniline from aqueous solution by a carboxylated polymeric sorbent. JOURNAL OF HAZARDOUS MATERIALS 2007; 143:462-8. [PMID: 17049737 DOI: 10.1016/j.jhazmat.2006.09.052] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2006] [Revised: 09/17/2006] [Accepted: 09/18/2006] [Indexed: 05/12/2023]
Abstract
In the present study a carboxylated styrene-divinylbenzene (St-DVB) polymeric sorbent (CSPS) was prepared for enhanced removal of p-chloroaniline from aqueous solution. A commercial styrene-divinylbenzene polymeric sorbent Amberlite XAD-4 was selected as the reference sorbent to evaluate the performance of CSPS. Characterization of CSPS was determined by infrared spectroscopy and pore size distribution. A p-chloroaniline sorption enhancement on CSPS at capacity about twice of Amberlite XAD-4 was observed, which was mainly attributed to the carboxyl group added on the polymeric matrix. Different pH-dependent sorption property of p-chloroaniline onto XAD-4 and CSPS was observed partly due to the role of carboxyl group. Sorption isotherm of p-chloroaniline on CSPS could be represented by Freundlich model reasonably, and that on XAD-4 was more suitable for Langmuir model. Kinetic studies demonstrated that the uptake of p-chloroaniline on CSPS and XAD-4 followed the pseudo-second order model. Moreover, breakthrough curves on CSPS further demonstrated its better performance towards p-chloroaniline removal from aqueous solution. Complete regeneration of the spent sorbent CSPS was achieved by dilute hydrochloric acid for its repeated use, implying its potential application in associated chemical wastewater treatments.
Collapse
Affiliation(s)
- Kai Zheng
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210093, PR China
| | | | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Meenakshi S, Viswanathan N. Identification of selective ion-exchange resin for fluoride sorption. J Colloid Interface Sci 2007; 308:438-50. [PMID: 17258756 DOI: 10.1016/j.jcis.2006.12.032] [Citation(s) in RCA: 347] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2006] [Revised: 12/07/2006] [Accepted: 12/08/2006] [Indexed: 11/26/2022]
Abstract
The defluoridation capacity (DC) of a chelating resin, namely Indion FR 10 (IND), and Ceralite IRA 400 (CER), an anion-exchange resin, were compared under various equilibrating conditions for the identification of selective sorbent. The results showed that chelating resin is more selective than an anion-exchange resin for fluoride removal. The fluoride sorption was reasonably explained using Freundlich and Langmuir isotherms. The surface morphology of resins before and after fluoride sorption was observed using scanning electron microscopy (SEM). Fourier transform infrared spectroscopy (FTIR) was used for the determination of functional groups responsible for fluoride sorption. Various thermodynamic parameters such as DeltaG0, DeltaH0, DeltaS0, and Ea have been calculated to understand the nature of sorption. The sorption kinetic mechanism was studied with reaction-based and diffusion-based models. The sorption process was found to be controlled by pseudo-second-order and particle diffusion models. The performance of the resins studied has been tested with field samples collected from a fluoride-endemic area.
Collapse
Affiliation(s)
- S Meenakshi
- Department of Chemistry, Gandhigram Rural University, Gandhigram 624 302, Tamil Nadu, India.
| | | |
Collapse
|