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Hughes DL, Afsar A, Laventine DM, Shaw EJ, Harwood LM, Hodson ME. Metal removal from soil leachates using DTPA-functionalised maghemite nanoparticles, a potential soil washing technology. Chemosphere 2018; 209:480-488. [PMID: 29940531 DOI: 10.1016/j.chemosphere.2018.06.121] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 06/14/2018] [Accepted: 06/18/2018] [Indexed: 06/08/2023]
Abstract
There is significant current interest in the application of magnetic (magnetite or maghemite) nanoparticles functionalised with chelating agents for the environmental remediation of metal contaminated waters and solutions. Whilst there is a body of knowledge about the potential remediation efficacy of such engineered nanoparticles from studies involving synthetic solutions of single metals, there is relatively little data involving mixed-metal solutions and virtually no studies about nanoparticle performance in chemically complex environmental solutions representing those to which a scaled-up nanoremediation process might eventually be applied. Therefore, we investigated the ability of diethylenetriaminepentaacetic acid (DTPA)-functionalised, silica-coated maghemite nanoparticles to extract potentially toxic (Cd, Co, Cu) and "non-toxic" (Ca, Mg) metals from solution (initial [metal] = 10 mg L-1; pH range: 2-8) and to extract a wider range of elements (As, Ca, Cd, Co, Cr, Cu, Mg, Na, Pb, Zn) from leachate obtained from 10 different contaminated soils with variable initial pH, (semi-)metal and dissolved organic carbon (DOC) concentrations. The functionalised nanoparticles could extract the potentially toxic metals with high efficiency (in general >70%) from single metal solutions and with efficiencies that were either unaffected or reduced from the soil leachates. Kd values remained high (>500 L kg-1), even for the soil leachate extractions. Our findings show that DOC and relatively high concentrations of non-toxic elements do not necessarily reduce the efficiency of metal contaminant removal by DTPA-functionalised magnetic nanoparticles and thus demonstrate the remediation potential of such particles when added to chemically complex soil-derived contaminated solutions.
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Affiliation(s)
- D L Hughes
- Soil Research Centre, Department of Geography and Environmental Science, School of Archaeology, Geography and Environmental Science, University of Reading, Whiteknights, Reading, RG6 6DW, UK
| | - A Afsar
- Department of Chemistry, University of Reading, Whiteknights, Reading, RG6 6AD, UK
| | - D M Laventine
- Department of Chemistry, University of Reading, Whiteknights, Reading, RG6 6AD, UK
| | - E J Shaw
- Soil Research Centre, Department of Geography and Environmental Science, School of Archaeology, Geography and Environmental Science, University of Reading, Whiteknights, Reading, RG6 6DW, UK
| | - L M Harwood
- Department of Chemistry, University of Reading, Whiteknights, Reading, RG6 6AD, UK
| | - M E Hodson
- Soil Research Centre, Department of Geography and Environmental Science, School of Archaeology, Geography and Environmental Science, University of Reading, Whiteknights, Reading, RG6 6DW, UK; Environment Department, University of York, York, YO10 5NG, UK.
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Hughes DL, Afsar A, Harwood LM, Jiang T, Laventine DM, Shaw LJ, Hodson ME. Adsorption of Pb and Zn from binary metal solutions and in the presence of dissolved organic carbon by DTPA-functionalised, silica-coated magnetic nanoparticles. Chemosphere 2017; 183:519-527. [PMID: 28570895 DOI: 10.1016/j.chemosphere.2017.05.146] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 05/17/2017] [Accepted: 05/24/2017] [Indexed: 05/28/2023]
Abstract
The ability of diethylenetriaminepentaacetic acid (DTPA)-functionalised, silica-coated magnetic nanoparticles to adsorb Pb and Zn from single and bi-metallic metal solutions and from solutions containing dissolved organic carbon was assessed. In all experiments 10 mL solutions containing 10 mg of nanoparticles were used. For single metal solutions (10 mg L-1 Pb or Zn) at pH 2 to 8, extraction efficiencies were typically >70%. In bi-metallic experiments, examining the effect of a background of either Zn or Pb (0.025 mmol L-1) on the adsorption of variable concentrations (0-0.045 mmol L-1) of the other metal (Pb or Zn, respectively) adsorption was well modelled by linear isotherms (R2 > 0.60; p ≤ 0.001) and Pb was preferentially adsorbed relative to Zn. In dissolved organic carbon experiments, the presence of fulvic acid (0, 2.1 and 21 mg DOC L-1) reduced Pb and Zn adsorption from 0.01, 0.1 and 1.0 mmol L-1 solutions. However, even at 21 mg DOC L-1 fulvic acid, extraction efficiencies from 0.01 to 0.1 mmol L-1 solutions remained >80% (Pb) and >50% (Zn). Decreases in extraction efficiency were significant between initial metal concentrations of 0.1 and 1.0 mmol L-1 indicating that at metal loadings between c. 100 mg kg-1 and 300 mg kg-1 occupancy of adsorption sites began to limit further adsorption. The nanoparticles have the potential to perform effectively as metal adsorbents in systems containing more than one metal and dissolved organic carbon at a range of pH values.
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Affiliation(s)
- D L Hughes
- Soil Research Centre, Department of Geography and Environmental Science, University of Reading, RG6 6DW, UK
| | - A Afsar
- Department of Chemistry, University of Reading, RG6 6AD, UK
| | - L M Harwood
- Department of Chemistry, University of Reading, RG6 6AD, UK
| | - T Jiang
- Soil Research Centre, Department of Geography and Environmental Science, University of Reading, RG6 6DW, UK
| | - D M Laventine
- Department of Chemistry, University of Reading, RG6 6AD, UK
| | - L J Shaw
- Soil Research Centre, Department of Geography and Environmental Science, University of Reading, RG6 6DW, UK
| | - M E Hodson
- Soil Research Centre, Department of Geography and Environmental Science, University of Reading, RG6 6DW, UK; Environment Department, University of York, York, YO10 5NG, UK.
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Aboagye EO, Aigbirhio FI, Allen P, Arent R, Arrowsmith RL, Banci G, Bagley MC, Bailey CD, Blake T, Bunt AJ, Bushby N, Carroll L, Cons BD, Cortezon F, Dilworth JR, Dorff PN, Eggleston IM, Ellames G, Elmore CS, Ernst G, Estrela P, Faithfull J, Ge H, Geach NJ, Hall J, Harding J, Harwood LM, Hickey MJ, Heys JR, Hogg C, Hudson MJ, James T, Kerr WJ, Killick D, Kingston LP, Kociok-Köhn G, Landvatter S, Lewis F, Lockley WJS, Marken F, Mudd RJ, Pascu SI, Pheko T, Powell ME, Reid M, Riss PJ, Ruhl T, Rustidge DC, Schenk DJ, Schofield C, Schweiger L, Sharma P, Smith D, Tuttle CTT, Testa A, Tyson JA, Tyrrell RM, Urbanek R, Wilkinson DJ, Willis CL, Zanda M. Abstracts of the 22nd International Isotope Society (UK Group) Symposium: synthesis and applications of labelled compounds 2013. J Labelled Comp Radiopharm 2014. [DOI: 10.1002/jlcr.3173] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- E. O. Aboagye
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - F. I. Aigbirhio
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - P. Allen
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - R. Arent
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - R. L. Arrowsmith
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - G. Banci
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - M. C. Bagley
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - C. D. Bailey
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - T. Blake
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - A. J. Bunt
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - N. Bushby
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - L. Carroll
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - B. D. Cons
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - F. Cortezon
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - J. R. Dilworth
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - P. N. Dorff
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - I. M. Eggleston
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - G. Ellames
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - C. S. Elmore
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - G. Ernst
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - P. Estrela
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - J. Faithfull
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - H. Ge
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - N. J. Geach
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - J. Hall
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - J. Harding
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - L. M. Harwood
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - M. J. Hickey
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - J. R. Heys
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - C. Hogg
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - M. J. Hudson
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - T. James
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - W. J. Kerr
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - D. Killick
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - L. P. Kingston
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - G. Kociok-Köhn
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - S. Landvatter
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - F. Lewis
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - W. J. S. Lockley
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - F. Marken
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - R. J. Mudd
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - S. I. Pascu
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - T. Pheko
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - M. E. Powell
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - M Reid
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - P. J. Riss
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - T. Ruhl
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - D. C. Rustidge
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - D. J. Schenk
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - C. Schofield
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - L. Schweiger
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - P. Sharma
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - D. Smith
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - C. T. T. Tuttle
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - A. Testa
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - J. A. Tyson
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - R. M. Tyrrell
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - R. Urbanek
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - D. J. Wilkinson
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - C. L. Willis
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
| | - M. Zanda
- Department of Chemistry, Faculty of Engineering and Physical Sciences; University of Surrey; Guildford Surrey GU2 7XH UK
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Abstract
The effects of several novel monosaccharides upon thymidine incorporation into both normal and tumour cells were investigated. The monosaccharide 2-deoxy-3-[1-(R)-(ethoxycarbonyl)ethyl]- alpha-D-allo-pyranose had the most inhibitory effect on proliferation, with the (S)-enantiomer having less inhibitory effects. The chiral centre at carbon-7 was found to be an important part of the molecule, as 2-deoxy-3-[methoxycarbonyl methyl]-alpha-D-allo-pyranose had greatly decreased anti-proliferative properties in comparison with the parent compound. In addition, the 2-deoxy structure at carbon-2 was also found to be important, as 3-[1-(S)-(ethoxycarbonyl)ethyl]-alpha-D-allo-hexopyranose had greatly decreased inhibitory properties in comparison with the parent compound. The results indicate that these novel monosaccharides possess potent anti-proliferative properties, related to their chiral carbon-7 and 2-deoxy carbon-2 structure and suggest that further substitutions of the functional group at carbon-7 may improve these properties and possibly produce inhibitor selectivity for tumour cells in preference to normal cells.
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Affiliation(s)
- A Colquhoun
- Department of Biochemistry, University of Oxford, U.K
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