kth.sePublications
Change search
Link to record
Permanent link

Direct link
Publications (10 of 10) Show all publications
Abdel-Magied, A. F., Abdelhamid, H. N., Ashour, R. M., Fu, L., Dowaidar, M., Xia, W. & Forsberg, K. (2022). Magnetic Metal-Organic Frameworks for Efficient Removal of Cadmium(II), and Lead(II) from Aqueous Solution. Journal of Environmental Chemical Engineering, 107467-107467, Article ID 107467.
Open this publication in new window or tab >>Magnetic Metal-Organic Frameworks for Efficient Removal of Cadmium(II), and Lead(II) from Aqueous Solution
Show others...
2022 (English)In: Journal of Environmental Chemical Engineering, ISSN 2213-3437, p. 107467-107467, article id 107467Article in journal (Refereed) Published
Abstract [en]

Efficient and convenient methods for the removal of toxic heavy metal ions especially Cd(II) and Pb(II) from aqueous solutions is of great importance due to their serious threat to public health and the ecological system. In this study, two magnetic metal-organic frameworks (namily: Fe3O4@ZIF-8, and Fe3O4@UiO-66–NH2) were synthesized, fully characterized, and applied for the adsorption of Cd(II) and Pb(II) from aqueous solutions. The adsorption efficiencies for the prepared nanocomposites are strongly dependent on the pH of the aqueous solution. The maximum adsorption capacities of Fe3O4@UiO-66–NH2, and Fe3O4@ZIF-8 at pH 6.0 were calculated to be 714.3 mg·g 1, and 370 mg·g 1 for Cd(II), respectively, and 833.3 mg·g 1, and 666.7 mg·g 1 for Pb(II), respectively. The adsorption process follows a pseudo-second-order model and fit the Langmuir isotherm model. Moreover, the thermodynamic studies revealed that the adsorption process is endothermic, and spontaneous in nature. A plausible adsorption mechanism was discussed in detail. The magnetic adsorbents: Fe3O4@ZIF-8, and Fe3O4@UiO-66–NH2 showed excellent reusability, maintaining the same efficiency for at least four consecutive cycles. These results reveal the potential use of magnetic Fe3O4@ZIF-8, and Fe3O4@UiO-66–NH2 as efficient adsorbents in removing Cd(II) and Pb(II) from aqueous solutions.

Place, publisher, year, edition, pages
Elsevier BV, 2022
National Category
Chemical Engineering
Identifiers
urn:nbn:se:kth:diva-309290 (URN)10.1016/j.jece.2022.107467 (DOI)000790504400002 ()2-s2.0-85127604432 (Scopus ID)
Note

QC 20220315

Available from: 2022-02-24 Created: 2022-02-24 Last updated: 2022-12-15Bibliographically approved
Ashour, R. M., Abdel-Magied, A. F., Wu, Q., Olsson, R. & Forsberg, K. (2020). Green Synthesis of Metal-Organic Framework Bacterial Cellulose Nanocomposites for Separation Applications. Polymers, 12(5), Article ID 1104.
Open this publication in new window or tab >>Green Synthesis of Metal-Organic Framework Bacterial Cellulose Nanocomposites for Separation Applications
Show others...
2020 (English)In: Polymers, E-ISSN 2073-4360, Vol. 12, no 5, article id 1104Article in journal (Refereed) Published
Abstract [en]

Metal organic frameworks (MOFs) are porous crystalline materials that can be designed to act as selective adsorbents. Due to their high porosity they can possess very high adsorption capacities. However, overcoming the brittleness of these crystalline materials is a challenge for many industrial applications. In order to make use of MOFs for large-scale liquid phase separation processes they can be immobilized on solid supports. For this purpose, nanocellulose can be considered as a promising supporting material due to its high flexibility and biocompatibility. In this study a novel flexible nanocellulose MOF composite material was synthesised in aqueous media by a novel and straightforward in situ one-pot green method. The material consisted of MOF particles of the type MIL-100(Fe) (from Material Institute de Lavoisier, containing Fe(III) 1,3,5-benzenetricarboxylate) immobilized onto bacterial cellulose (BC) nanofibers. The novel nanocomposite material was applied to efficiently separate arsenic and Rhodamine B from aqueous solution, achieving adsorption capacities of 4.81, and 2.77 mg g‒1, respectively. The adsorption process could be well modelled by the nonlinear pseudo-second-order fitting.

Place, publisher, year, edition, pages
MDPI AG, 2020
Keywords
bacterial cellulose; metal organic framework; nanocomposite; adsorption
National Category
Chemical Engineering
Identifiers
urn:nbn:se:kth:diva-273401 (URN)10.3390/polym12051104 (DOI)000541431100109 ()32413965 (PubMedID)2-s2.0-85085969153 (Scopus ID)
Note

QC 20200624

Available from: 2020-05-16 Created: 2020-05-16 Last updated: 2024-03-18Bibliographically approved
Abdel-Magied, A. F., Nasser Abdelhamid, H., Ashour, R. M., Zou, X. & Forsberg, K. (2019). Hierarchical porous zeolitic imidazolate framework nanoparticles for efficient adsorption of rare-earth elements. Microporous and Mesoporous Materials, 278, 175-184
Open this publication in new window or tab >>Hierarchical porous zeolitic imidazolate framework nanoparticles for efficient adsorption of rare-earth elements
Show others...
2019 (English)In: Microporous and Mesoporous Materials, ISSN 1387-1811, E-ISSN 1873-3093, Vol. 278, p. 175-184Article in journal (Refereed) Published
Abstract [en]

Hierarchical porous zeolitic imidazolate frameworks nanoparticles (ZIF-8 NPs) were synthesized at room temperature via a template-free approach under dynamic conditions (stirring) using water as a solvent. The ZIF-8 NPs were evaluated as adsorbents for rare earth elements (La3+, Sm3+ and Dy3+). Adsorption equilibrium was reached after 7h and high adsorption capacities were obtained for dysprosium and samarium (430.4 and 281.1 mg g(-1), respectively) and moderate adsorption capacity for lanthanum (28.8 mg g(-1)) at a pH of 7.0. The high adsorption capacitiese, as well as the high stability of ZIF-8 NPs, make the hierarchical ZIF-8 materials as an efficient adsorbent for the recovery of La3+, Sm3+ and Dy3+ from aqueous solution.

Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
Metal‒Organic frameworks, Zeolitic imidazolate frameworks, Adsorption, Rare earth elements, Hierarchical porous ZIF-8
National Category
Chemical Engineering
Identifiers
urn:nbn:se:kth:diva-239161 (URN)10.1016/j.micromeso.2018.11.022 (DOI)000459841900021 ()2-s2.0-85057153247 (Scopus ID)
Note

QC 20191004

Available from: 2018-11-16 Created: 2018-11-16 Last updated: 2022-12-15Bibliographically approved
Ashour, R., Samouhos, M., Polido Legaria, E., Svärd, M., Högblom, J., Forsberg, K., . . . Rasmuson, Å. C. (2018). DTPA-Functionalized Silica Nano- and Microparticles for Adsorption and Chromatographic Separation of Rare Earth Elements. ACS Sustainable Chemistry and Engineering, 6(5), 6889-6900
Open this publication in new window or tab >>DTPA-Functionalized Silica Nano- and Microparticles for Adsorption and Chromatographic Separation of Rare Earth Elements
Show others...
2018 (English)In: ACS Sustainable Chemistry and Engineering, E-ISSN 2168-0485, Vol. 6, no 5, p. 6889-6900Article in journal (Refereed) Published
Abstract [en]

Silica nanoparticles and porous microparticles have been successfully functionalized with a monolayer of DTPA-derived ligands. The ligand grafting is chemically robust and does not appreciably influence the morphology or the structure of the material. The produced particles exhibit quick kinetics and high capacity for REE adsorption. The feasibility of using the DTPA-functionalized microparticles for chromatographic separation of rare earth elements has been investigated for different sample concentrations, elution modes, eluent concentrations, eluent flow rates, and column temperatures. Good separation of the La(III), Ce(III), Pr(III), Nd(III), and Dy(III) ions was achieved using HNO3 as eluent using a linear concentration gradient from 0 to 0.15 M over 55 min. The long-term performance of the functionalized column has been verified, with very little deterioration recorded over more than 50 experiments. The results of this study demonstrate the potential for using DTPA-functionalized silica particles in a chromatographic process for separating these valuable elements from waste sources, as an environmentally preferable alternative to standard solvent-intensive processes.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2018
Keywords
Chelation ion chromatography; Diethylenetriaminepentaacetic acid; Hybrid nanoadsorbent; Rare earth elements; Separation
National Category
Chemical Engineering Materials Chemistry
Identifiers
urn:nbn:se:kth:diva-226580 (URN)10.1021/acssuschemeng.8b00725 (DOI)000431927500131 ()2-s2.0-85046140915 (Scopus ID)
Funder
Swedish Foundation for Strategic Research , IRT 11-0026EU, FP7, Seventh Framework Programme, 309373
Note

QC 20180509

Available from: 2018-04-21 Created: 2018-04-21 Last updated: 2024-03-18Bibliographically approved
El-Sayed, R., Ye, F., Asem, H., Ashour, R., Zheng, W., Muhammed, M. & Hassan, M. (2017). Importance of the surface chemistry of nanoparticles on peroxidase-like activity. Biochemical and Biophysical Research Communications - BBRC, 491(1), 15-18
Open this publication in new window or tab >>Importance of the surface chemistry of nanoparticles on peroxidase-like activity
Show others...
2017 (English)In: Biochemical and Biophysical Research Communications - BBRC, ISSN 0006-291X, E-ISSN 1090-2104, Vol. 491, no 1, p. 15-18Article in journal (Refereed) Published
Abstract [en]

We report the studies on origin of peroxidase-like activity for gold nanoparticles, as well as the impact from morphology and surface charge of nanoparticles. For this purpose, we have synthesized hollow gold nanospheres (HAuNS) and gold nanorods (AuNR) with different morphology and surface chemistry to investigate their influence on the catalytic activity. We found that citrate-capped HAuNS show catalyzing efficiency in oxidation reaction of 3,3′,5,5′-tetramethylbenzidine (TMB) by hydrogen peroxide (H2O2) and it is superior to that of cetyltrimethylammonium bromide (CTAB)-capped AuNR. The kinetics of catalytic activities from HAuNS and AuNR were respectively studied under varied temperatures. The results indicated that surface chemistry rather than morphology of nanoparticles plays an important role in the catalytic reaction of substrate. Furthermore, influencing factors such as pH, amount of nanoparticle and H2O2 concentration were also investigated on HAuNS-catalyzed system. The great impact of nanoparticle surface properties on catalytic reactions makes a paradigm in constructing nanozymes as peroxidase mimic for sensing application.

Place, publisher, year, edition, pages
Elsevier, 2017
Keywords
Enzyme mimic, Gold nanorods, Hollow gold nanospheres, Peroxidase activity, Surface chemistry
National Category
Materials Chemistry
Identifiers
urn:nbn:se:kth:diva-212231 (URN)10.1016/j.bbrc.2017.07.014 (DOI)000408518700003 ()28687493 (PubMedID)2-s2.0-85023636388 (Scopus ID)
Funder
Swedish Cancer Society, CAN 2014/759
Note

QC 20170821

Available from: 2017-08-21 Created: 2017-08-21 Last updated: 2024-03-18Bibliographically approved
Ashour, R. (2017). Rare Earth Ions Adsorption on Graphene Oxide Nanosheets. Solvent extraction and ion exchange
Open this publication in new window or tab >>Rare Earth Ions Adsorption on Graphene Oxide Nanosheets
2017 (English)In: Solvent extraction and ion exchange, ISSN 0736-6299, E-ISSN 1532-2262Article in journal (Refereed) [Artistic work] Published
Place, publisher, year, edition, pages
Taylor & Francis, 2017
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-200634 (URN)
Note

QCR 20170131

Available from: 2017-01-30 Created: 2017-01-30 Last updated: 2024-03-18Bibliographically approved
Ashour, R. M., Abdelhamid, H. N., Abdel-Magied, A. F., Abdel-Khalek, A. A., Ali, M. M., Uheida, A., . . . Dutta, J. (2017). Rare Earth Ions Adsorption onto Graphene Oxide Nanosheets. Solvent extraction and ion exchange, 35(2), 91-103
Open this publication in new window or tab >>Rare Earth Ions Adsorption onto Graphene Oxide Nanosheets
Show others...
2017 (English)In: Solvent extraction and ion exchange, ISSN 0736-6299, E-ISSN 1532-2262, Vol. 35, no 2, p. 91-103Article in journal (Refereed) Published
Abstract [en]

Graphene oxide (GO) was synthesized and used as a coagulant of rare earth elements (REEs) from aqueous solution. Stability and adsorption capacities were exhibited for target REEs such as La(III), Nd(III), Gd(III), and Y(III). The parameters influencing the adsorption capacity of the target species including contact time, pH, initial concentration, and temperature were optimized. The adsorption kinetics and thermodynamics were studied. The method showed quantitative recovery (99%) upon desorption using HNO3 acid (0.1 M) after a short contact time (15 min).

Place, publisher, year, edition, pages
Taylor & Francis, 2017
Keywords
Adsorption, desorption, rare earth, graphene oxide
National Category
Physical Chemistry
Identifiers
urn:nbn:se:kth:diva-207923 (URN)10.1080/07366299.2017.1287509 (DOI)000400509800002 ()2-s2.0-85014556348 (Scopus ID)
Note

QC 20170529

Available from: 2017-05-29 Created: 2017-05-29 Last updated: 2024-03-18Bibliographically approved
Ashour, R. M., El-sayed, R., Abdel-Magied, A. F., Abdel-khalek, A. A., Ali, M. M., Forsberg, K., . . . Dutta, J. (2017). Selective separation of rare earth ions from aqueous solution using functionalized magnetite nanoparticles: kinetic and thermodynamic studies. Chemical Engineering Journal, 327, 286-296
Open this publication in new window or tab >>Selective separation of rare earth ions from aqueous solution using functionalized magnetite nanoparticles: kinetic and thermodynamic studies
Show others...
2017 (English)In: Chemical Engineering Journal, ISSN 1385-8947, E-ISSN 1873-3212, Vol. 327, p. 286-296Article in journal (Refereed) Published
Abstract [en]

Separation of rare earth ions (RE3+) from aqueous solution is a tricky problem due to their physico-chemical similarities of properties. In this study, we investigate the influence of the functionalized ligands on the adsorption efficiency and selective adsorption of La3+, Nd3+, Gd3+ and Y3+ from aqueous solution using Magnetite (Fe3O4) nanoparticles (NPs) functionalized with citric acid (CA@Fe3O4 NPs) or L-cysteine (Cys@Fe3O4 NPs). The microstructure, thermal behavior and surface functionalization of the synthesized nanoparticles were studied. The general adsorption capacity of Cys@Fe3O4 NPs was found to be high (98 mg g−1) in comparison to CA@Fe3O4 NPs (52 mg g−1) at neutral pH 7.0. The adsorption kinetic studies revealed that the adsorption of RE3+ ions follows a pseudo second-order model and the adsorption equilibrium data fits well to the Langmuir isotherm. Thermodynamic studies imply that the adsorption process was endothermic and spontaneous in nature. Controlled desorption within 30 min of the adsorbed RE3+ ions from both Cys@Fe3O4 NPs and CA@Fe3O4 NPs was achieved with 0.5 M HNO3. Furthermore, Cys@Fe3O4 NPs exhibited a higher separation factor (SF) in the separation of Gd3+/La3+, Gd3+/Nd3+, Gd3+/Y3+ ions compared to CA@Fe3O4 NPs.

Place, publisher, year, edition, pages
Elsevier, 2017
Keywords
Adsorption, Citric acid, Functionalization, L-cysteine, Magnetic nanoparticles, Rare earths
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-212210 (URN)10.1016/j.cej.2017.06.101 (DOI)000408663800031 ()2-s2.0-85026552653 (Scopus ID)
Note

QC 20170821

Available from: 2017-08-21 Created: 2017-08-21 Last updated: 2024-03-15Bibliographically approved
Ashour, R. M., Abdel-Magied, A. F., Abdel-khalek, A. A., Helaly, O. & Ali, M. (2016). Preparation and Characterization of Magnetic Iron Oxide Nanoparticles Functionalized by L- cysteine: Adsorption and Desorption Behavior for Rare Earth Metal Ions”. Journal of Environmental Chemical Engineering, 4, 3114-3121
Open this publication in new window or tab >>Preparation and Characterization of Magnetic Iron Oxide Nanoparticles Functionalized by L- cysteine: Adsorption and Desorption Behavior for Rare Earth Metal Ions”
Show others...
2016 (English)In: Journal of Environmental Chemical Engineering, E-ISSN 2213-3437, Vol. 4, p. 3114-3121Article in journal (Refereed) [Artistic work] Published
Abstract [en]

In this work, magnetic iron oxide nanoparticles functionalized with l-cysteine (Cys-Fe3O4NPs) was synthesized and fully characterized by transmission electron microscopy (TEM), X-ray powder diffraction (XRD), Fourier transform infra-red (FTIR), thermogravimetric analysis (TGA) and zeta potential measurements. The synthesized Cys-Fe3O4NPs has been evaluated as a highly adsorbent for the adsorption of a mixture of four rare earths RE3+ ions (La3+, Nd3+, Gd3+ and Y3+) from digested monazite solutions. The influence of various factors on the adsorption efficiency such as, the contact time, sample pH, temperature, and concentration of the stripping solution were investigated. The results indicate that Cys-Fe3O4 NPs achieve high removal efficiency 96.7, 99.3, 96.5 and 87% for La3+, Nd3+, Gd3+ and Y3+ ions, respectively, at pH = 6 within 15 min, and the adsorbent affinity for metal ions was found to be in order of Nd3+ > La3+ > Gd3+ > Y3+ ions. Using the Langmuir model, a maximum adsorption capacity of La3+, Nd3+, Gd3+ and Y3+ at room temperature was found to be 71.5, 145.5, 64.5 and 13.6 mg g−1, respectively. The Langmuir isotherm and pseudo-second order model fitted much better than the other isotherms and kinetic models. The obtained results for the thermodynamic parameters confirmed the spontaneous and endothermic nature of the process. Moreover, the desorption was carried out with 0.1 M nitric acid solutions. In addition, Cys-Fe3O4 NPs can be used as a highly efficient adsorbent for the adsorption of La3+, Nd3+, Gd3+ and Y3+ ions from digested monazite solutions.

Keywords
Monazite; Magnetic nanoparticles; Adsorption; Rare earth elements; Desorption
National Category
Chemical Sciences
Research subject
Chemistry
Identifiers
urn:nbn:se:kth:diva-200631 (URN)10.1016/j.jece.2016.06.022 (DOI)000391698400055 ()2-s2.0-84976874629 (Scopus ID)
Note

QC 20170201

Available from: 2017-01-30 Created: 2017-01-30 Last updated: 2024-03-18Bibliographically approved
Abdel-Khalek, A. A., Ali, M. M., Ashour, R. & Abdel-Magied, A. F. (2011). Chemical Studies on Uranium Extraction from Concentrated Phosphoric Acid by Using PC88A and DBBP Mixture.. Journal of Radioanalytical and Nuclear Chemistry, 290, 353-359
Open this publication in new window or tab >>Chemical Studies on Uranium Extraction from Concentrated Phosphoric Acid by Using PC88A and DBBP Mixture.
2011 (English)In: Journal of Radioanalytical and Nuclear Chemistry, ISSN 0236-5731, E-ISSN 1588-2780, Vol. 290, p. 353-359Article in journal (Refereed) [Artistic work] Published
Abstract [en]

Liquid–liquid extraction of U (VI) from concentrated phosphoric acid by using (2-ethyl hexyl) phosphonic acid, mono (2-ethyl hexyl) ester (PC88A) and di-butyl butyl phosphonate (DBBP) has been investigated. The effect of different factors affecting the extraction process (PC88A concentration, DBBP concentration, shaking time, aqueous/organic phase ratio, phosphoric acid concentration and effect of diluents) have been investigated. The obtained data of temperature on the extraction showed that the enthalpy change is −17.15 kJ mol−1. Uranium was extracted from the strip liquor by using di (2-ethylhexyl) phosphoric acid and tri-octyl phosphine oxide mixture and finally converted to a high purity UO3 product using precipitation with hydrogen peroxide and heat treatment at 365 °C.

Place, publisher, year, edition, pages
Springer, 2011
Keywords
UraniumExtractionPhosphoric acidKinetics
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-200637 (URN)10.1007/s10967-011-1372-8 (DOI)000295418600018 ()2-s2.0-80054973473 (Scopus ID)
Note

QC 20170131

Available from: 2017-01-30 Created: 2017-01-30 Last updated: 2024-03-18Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-9390-7944

Search in DiVA

Show all publications