Low-cost hemp biomaterials for nickel ions removal from aqueous solutions
This study investigates an alternative use of hemp-based materials either in hemp fiber (HF) or shive (HS) form as biosorbents for the removal of Ni(II) from aqueous solutions. The hemp materials were used either in raw form or after chemical modification with sodium hydroxide and citric acid in ord...
Ausführliche Beschreibung
Autor*in: |
Kyzas, George Z. [verfasserIn] |
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E-Artikel |
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Sprache: |
Englisch |
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2015transfer abstract |
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10 |
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Übergeordnetes Werk: |
Enthalten in: Application of a fuzzy-logic based model for risk assessment in additive manufacturing R&D projects - Moreno-Cabezali, Belen Maria ELSEVIER, 2020, an international journal devoted to fundamental aspects of structure, interactions and dynamic processes in simple, molecular and complex liquids, New York, NY [u.a.] |
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Übergeordnetes Werk: |
volume:209 ; year:2015 ; pages:209-218 ; extent:10 |
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DOI / URN: |
10.1016/j.molliq.2015.05.060 |
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ELV018262058 |
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520 | |a This study investigates an alternative use of hemp-based materials either in hemp fiber (HF) or shive (HS) form as biosorbents for the removal of Ni(II) from aqueous solutions. The hemp materials were used either in raw form or after chemical modification with sodium hydroxide and citric acid in order to remove any impurities and add extra carboxyl groups (which improve the adsorption), respectively. A series of adsorption experiments was carried out to determine the effect of (i) solution pH on Ni(II) adsorption, (ii) contact time (kinetics fitted to linear pseudo-first, -second order equations and Elovich model), and (iii) initial ion concentration (fitting to Langmuir, Freundlich and Langmuir–Freundlich equations). Furthermore, a complete characterization study (FTIR, XRD, SEM/EDAX, crystallinity, and cellulose content) demonstrated the surface morphology of the prepared hemp-materials along with some possible adsorption interactions between them and ions. The regeneration of materials was confirmed running desorption experiments (effect of solution pH on desorption) finding also the optimum desorption contact time (kinetics fitted to non-linear pseudo-first and -second order equations). Ten sequential reuse cycles (at the optimum conditions found after adsorption and desorption experiments) revealed the reuse potential of the low-cost hemp-based materials. | ||
520 | |a This study investigates an alternative use of hemp-based materials either in hemp fiber (HF) or shive (HS) form as biosorbents for the removal of Ni(II) from aqueous solutions. The hemp materials were used either in raw form or after chemical modification with sodium hydroxide and citric acid in order to remove any impurities and add extra carboxyl groups (which improve the adsorption), respectively. A series of adsorption experiments was carried out to determine the effect of (i) solution pH on Ni(II) adsorption, (ii) contact time (kinetics fitted to linear pseudo-first, -second order equations and Elovich model), and (iii) initial ion concentration (fitting to Langmuir, Freundlich and Langmuir–Freundlich equations). Furthermore, a complete characterization study (FTIR, XRD, SEM/EDAX, crystallinity, and cellulose content) demonstrated the surface morphology of the prepared hemp-materials along with some possible adsorption interactions between them and ions. The regeneration of materials was confirmed running desorption experiments (effect of solution pH on desorption) finding also the optimum desorption contact time (kinetics fitted to non-linear pseudo-first and -second order equations). Ten sequential reuse cycles (at the optimum conditions found after adsorption and desorption experiments) revealed the reuse potential of the low-cost hemp-based materials. | ||
700 | 1 | |a Terzopoulou, Zoi |4 oth | |
700 | 1 | |a Nikolaidis, Vasileios |4 oth | |
700 | 1 | |a Alexopoulou, Efthimia |4 oth | |
700 | 1 | |a Bikiaris, Dimitrios N. |4 oth | |
773 | 0 | 8 | |i Enthalten in |n Elsevier |a Moreno-Cabezali, Belen Maria ELSEVIER |t Application of a fuzzy-logic based model for risk assessment in additive manufacturing R&D projects |d 2020 |d an international journal devoted to fundamental aspects of structure, interactions and dynamic processes in simple, molecular and complex liquids |g New York, NY [u.a.] |w (DE-627)ELV004280490 |
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10.1016/j.molliq.2015.05.060 doi GBVA2015004000025.pica (DE-627)ELV018262058 (ELSEVIER)S0167-7322(15)30132-X DE-627 ger DE-627 rakwb eng 540 540 DE-600 004 VZ 85.35 bkl 54.80 bkl Kyzas, George Z. verfasserin aut Low-cost hemp biomaterials for nickel ions removal from aqueous solutions 2015transfer abstract 10 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier This study investigates an alternative use of hemp-based materials either in hemp fiber (HF) or shive (HS) form as biosorbents for the removal of Ni(II) from aqueous solutions. The hemp materials were used either in raw form or after chemical modification with sodium hydroxide and citric acid in order to remove any impurities and add extra carboxyl groups (which improve the adsorption), respectively. A series of adsorption experiments was carried out to determine the effect of (i) solution pH on Ni(II) adsorption, (ii) contact time (kinetics fitted to linear pseudo-first, -second order equations and Elovich model), and (iii) initial ion concentration (fitting to Langmuir, Freundlich and Langmuir–Freundlich equations). Furthermore, a complete characterization study (FTIR, XRD, SEM/EDAX, crystallinity, and cellulose content) demonstrated the surface morphology of the prepared hemp-materials along with some possible adsorption interactions between them and ions. The regeneration of materials was confirmed running desorption experiments (effect of solution pH on desorption) finding also the optimum desorption contact time (kinetics fitted to non-linear pseudo-first and -second order equations). Ten sequential reuse cycles (at the optimum conditions found after adsorption and desorption experiments) revealed the reuse potential of the low-cost hemp-based materials. This study investigates an alternative use of hemp-based materials either in hemp fiber (HF) or shive (HS) form as biosorbents for the removal of Ni(II) from aqueous solutions. The hemp materials were used either in raw form or after chemical modification with sodium hydroxide and citric acid in order to remove any impurities and add extra carboxyl groups (which improve the adsorption), respectively. A series of adsorption experiments was carried out to determine the effect of (i) solution pH on Ni(II) adsorption, (ii) contact time (kinetics fitted to linear pseudo-first, -second order equations and Elovich model), and (iii) initial ion concentration (fitting to Langmuir, Freundlich and Langmuir–Freundlich equations). Furthermore, a complete characterization study (FTIR, XRD, SEM/EDAX, crystallinity, and cellulose content) demonstrated the surface morphology of the prepared hemp-materials along with some possible adsorption interactions between them and ions. The regeneration of materials was confirmed running desorption experiments (effect of solution pH on desorption) finding also the optimum desorption contact time (kinetics fitted to non-linear pseudo-first and -second order equations). Ten sequential reuse cycles (at the optimum conditions found after adsorption and desorption experiments) revealed the reuse potential of the low-cost hemp-based materials. Terzopoulou, Zoi oth Nikolaidis, Vasileios oth Alexopoulou, Efthimia oth Bikiaris, Dimitrios N. oth Enthalten in Elsevier Moreno-Cabezali, Belen Maria ELSEVIER Application of a fuzzy-logic based model for risk assessment in additive manufacturing R&D projects 2020 an international journal devoted to fundamental aspects of structure, interactions and dynamic processes in simple, molecular and complex liquids New York, NY [u.a.] (DE-627)ELV004280490 volume:209 year:2015 pages:209-218 extent:10 https://doi.org/10.1016/j.molliq.2015.05.060 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 85.35 Fertigung VZ 54.80 Angewandte Informatik VZ AR 209 2015 209-218 10 045F 540 |
spelling |
10.1016/j.molliq.2015.05.060 doi GBVA2015004000025.pica (DE-627)ELV018262058 (ELSEVIER)S0167-7322(15)30132-X DE-627 ger DE-627 rakwb eng 540 540 DE-600 004 VZ 85.35 bkl 54.80 bkl Kyzas, George Z. verfasserin aut Low-cost hemp biomaterials for nickel ions removal from aqueous solutions 2015transfer abstract 10 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier This study investigates an alternative use of hemp-based materials either in hemp fiber (HF) or shive (HS) form as biosorbents for the removal of Ni(II) from aqueous solutions. The hemp materials were used either in raw form or after chemical modification with sodium hydroxide and citric acid in order to remove any impurities and add extra carboxyl groups (which improve the adsorption), respectively. A series of adsorption experiments was carried out to determine the effect of (i) solution pH on Ni(II) adsorption, (ii) contact time (kinetics fitted to linear pseudo-first, -second order equations and Elovich model), and (iii) initial ion concentration (fitting to Langmuir, Freundlich and Langmuir–Freundlich equations). Furthermore, a complete characterization study (FTIR, XRD, SEM/EDAX, crystallinity, and cellulose content) demonstrated the surface morphology of the prepared hemp-materials along with some possible adsorption interactions between them and ions. The regeneration of materials was confirmed running desorption experiments (effect of solution pH on desorption) finding also the optimum desorption contact time (kinetics fitted to non-linear pseudo-first and -second order equations). Ten sequential reuse cycles (at the optimum conditions found after adsorption and desorption experiments) revealed the reuse potential of the low-cost hemp-based materials. This study investigates an alternative use of hemp-based materials either in hemp fiber (HF) or shive (HS) form as biosorbents for the removal of Ni(II) from aqueous solutions. The hemp materials were used either in raw form or after chemical modification with sodium hydroxide and citric acid in order to remove any impurities and add extra carboxyl groups (which improve the adsorption), respectively. A series of adsorption experiments was carried out to determine the effect of (i) solution pH on Ni(II) adsorption, (ii) contact time (kinetics fitted to linear pseudo-first, -second order equations and Elovich model), and (iii) initial ion concentration (fitting to Langmuir, Freundlich and Langmuir–Freundlich equations). Furthermore, a complete characterization study (FTIR, XRD, SEM/EDAX, crystallinity, and cellulose content) demonstrated the surface morphology of the prepared hemp-materials along with some possible adsorption interactions between them and ions. The regeneration of materials was confirmed running desorption experiments (effect of solution pH on desorption) finding also the optimum desorption contact time (kinetics fitted to non-linear pseudo-first and -second order equations). Ten sequential reuse cycles (at the optimum conditions found after adsorption and desorption experiments) revealed the reuse potential of the low-cost hemp-based materials. Terzopoulou, Zoi oth Nikolaidis, Vasileios oth Alexopoulou, Efthimia oth Bikiaris, Dimitrios N. oth Enthalten in Elsevier Moreno-Cabezali, Belen Maria ELSEVIER Application of a fuzzy-logic based model for risk assessment in additive manufacturing R&D projects 2020 an international journal devoted to fundamental aspects of structure, interactions and dynamic processes in simple, molecular and complex liquids New York, NY [u.a.] (DE-627)ELV004280490 volume:209 year:2015 pages:209-218 extent:10 https://doi.org/10.1016/j.molliq.2015.05.060 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 85.35 Fertigung VZ 54.80 Angewandte Informatik VZ AR 209 2015 209-218 10 045F 540 |
allfields_unstemmed |
10.1016/j.molliq.2015.05.060 doi GBVA2015004000025.pica (DE-627)ELV018262058 (ELSEVIER)S0167-7322(15)30132-X DE-627 ger DE-627 rakwb eng 540 540 DE-600 004 VZ 85.35 bkl 54.80 bkl Kyzas, George Z. verfasserin aut Low-cost hemp biomaterials for nickel ions removal from aqueous solutions 2015transfer abstract 10 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier This study investigates an alternative use of hemp-based materials either in hemp fiber (HF) or shive (HS) form as biosorbents for the removal of Ni(II) from aqueous solutions. The hemp materials were used either in raw form or after chemical modification with sodium hydroxide and citric acid in order to remove any impurities and add extra carboxyl groups (which improve the adsorption), respectively. A series of adsorption experiments was carried out to determine the effect of (i) solution pH on Ni(II) adsorption, (ii) contact time (kinetics fitted to linear pseudo-first, -second order equations and Elovich model), and (iii) initial ion concentration (fitting to Langmuir, Freundlich and Langmuir–Freundlich equations). Furthermore, a complete characterization study (FTIR, XRD, SEM/EDAX, crystallinity, and cellulose content) demonstrated the surface morphology of the prepared hemp-materials along with some possible adsorption interactions between them and ions. The regeneration of materials was confirmed running desorption experiments (effect of solution pH on desorption) finding also the optimum desorption contact time (kinetics fitted to non-linear pseudo-first and -second order equations). Ten sequential reuse cycles (at the optimum conditions found after adsorption and desorption experiments) revealed the reuse potential of the low-cost hemp-based materials. This study investigates an alternative use of hemp-based materials either in hemp fiber (HF) or shive (HS) form as biosorbents for the removal of Ni(II) from aqueous solutions. The hemp materials were used either in raw form or after chemical modification with sodium hydroxide and citric acid in order to remove any impurities and add extra carboxyl groups (which improve the adsorption), respectively. A series of adsorption experiments was carried out to determine the effect of (i) solution pH on Ni(II) adsorption, (ii) contact time (kinetics fitted to linear pseudo-first, -second order equations and Elovich model), and (iii) initial ion concentration (fitting to Langmuir, Freundlich and Langmuir–Freundlich equations). Furthermore, a complete characterization study (FTIR, XRD, SEM/EDAX, crystallinity, and cellulose content) demonstrated the surface morphology of the prepared hemp-materials along with some possible adsorption interactions between them and ions. The regeneration of materials was confirmed running desorption experiments (effect of solution pH on desorption) finding also the optimum desorption contact time (kinetics fitted to non-linear pseudo-first and -second order equations). Ten sequential reuse cycles (at the optimum conditions found after adsorption and desorption experiments) revealed the reuse potential of the low-cost hemp-based materials. Terzopoulou, Zoi oth Nikolaidis, Vasileios oth Alexopoulou, Efthimia oth Bikiaris, Dimitrios N. oth Enthalten in Elsevier Moreno-Cabezali, Belen Maria ELSEVIER Application of a fuzzy-logic based model for risk assessment in additive manufacturing R&D projects 2020 an international journal devoted to fundamental aspects of structure, interactions and dynamic processes in simple, molecular and complex liquids New York, NY [u.a.] (DE-627)ELV004280490 volume:209 year:2015 pages:209-218 extent:10 https://doi.org/10.1016/j.molliq.2015.05.060 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 85.35 Fertigung VZ 54.80 Angewandte Informatik VZ AR 209 2015 209-218 10 045F 540 |
allfieldsGer |
10.1016/j.molliq.2015.05.060 doi GBVA2015004000025.pica (DE-627)ELV018262058 (ELSEVIER)S0167-7322(15)30132-X DE-627 ger DE-627 rakwb eng 540 540 DE-600 004 VZ 85.35 bkl 54.80 bkl Kyzas, George Z. verfasserin aut Low-cost hemp biomaterials for nickel ions removal from aqueous solutions 2015transfer abstract 10 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier This study investigates an alternative use of hemp-based materials either in hemp fiber (HF) or shive (HS) form as biosorbents for the removal of Ni(II) from aqueous solutions. The hemp materials were used either in raw form or after chemical modification with sodium hydroxide and citric acid in order to remove any impurities and add extra carboxyl groups (which improve the adsorption), respectively. A series of adsorption experiments was carried out to determine the effect of (i) solution pH on Ni(II) adsorption, (ii) contact time (kinetics fitted to linear pseudo-first, -second order equations and Elovich model), and (iii) initial ion concentration (fitting to Langmuir, Freundlich and Langmuir–Freundlich equations). Furthermore, a complete characterization study (FTIR, XRD, SEM/EDAX, crystallinity, and cellulose content) demonstrated the surface morphology of the prepared hemp-materials along with some possible adsorption interactions between them and ions. The regeneration of materials was confirmed running desorption experiments (effect of solution pH on desorption) finding also the optimum desorption contact time (kinetics fitted to non-linear pseudo-first and -second order equations). Ten sequential reuse cycles (at the optimum conditions found after adsorption and desorption experiments) revealed the reuse potential of the low-cost hemp-based materials. This study investigates an alternative use of hemp-based materials either in hemp fiber (HF) or shive (HS) form as biosorbents for the removal of Ni(II) from aqueous solutions. The hemp materials were used either in raw form or after chemical modification with sodium hydroxide and citric acid in order to remove any impurities and add extra carboxyl groups (which improve the adsorption), respectively. A series of adsorption experiments was carried out to determine the effect of (i) solution pH on Ni(II) adsorption, (ii) contact time (kinetics fitted to linear pseudo-first, -second order equations and Elovich model), and (iii) initial ion concentration (fitting to Langmuir, Freundlich and Langmuir–Freundlich equations). Furthermore, a complete characterization study (FTIR, XRD, SEM/EDAX, crystallinity, and cellulose content) demonstrated the surface morphology of the prepared hemp-materials along with some possible adsorption interactions between them and ions. The regeneration of materials was confirmed running desorption experiments (effect of solution pH on desorption) finding also the optimum desorption contact time (kinetics fitted to non-linear pseudo-first and -second order equations). Ten sequential reuse cycles (at the optimum conditions found after adsorption and desorption experiments) revealed the reuse potential of the low-cost hemp-based materials. Terzopoulou, Zoi oth Nikolaidis, Vasileios oth Alexopoulou, Efthimia oth Bikiaris, Dimitrios N. oth Enthalten in Elsevier Moreno-Cabezali, Belen Maria ELSEVIER Application of a fuzzy-logic based model for risk assessment in additive manufacturing R&D projects 2020 an international journal devoted to fundamental aspects of structure, interactions and dynamic processes in simple, molecular and complex liquids New York, NY [u.a.] (DE-627)ELV004280490 volume:209 year:2015 pages:209-218 extent:10 https://doi.org/10.1016/j.molliq.2015.05.060 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 85.35 Fertigung VZ 54.80 Angewandte Informatik VZ AR 209 2015 209-218 10 045F 540 |
allfieldsSound |
10.1016/j.molliq.2015.05.060 doi GBVA2015004000025.pica (DE-627)ELV018262058 (ELSEVIER)S0167-7322(15)30132-X DE-627 ger DE-627 rakwb eng 540 540 DE-600 004 VZ 85.35 bkl 54.80 bkl Kyzas, George Z. verfasserin aut Low-cost hemp biomaterials for nickel ions removal from aqueous solutions 2015transfer abstract 10 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier This study investigates an alternative use of hemp-based materials either in hemp fiber (HF) or shive (HS) form as biosorbents for the removal of Ni(II) from aqueous solutions. The hemp materials were used either in raw form or after chemical modification with sodium hydroxide and citric acid in order to remove any impurities and add extra carboxyl groups (which improve the adsorption), respectively. A series of adsorption experiments was carried out to determine the effect of (i) solution pH on Ni(II) adsorption, (ii) contact time (kinetics fitted to linear pseudo-first, -second order equations and Elovich model), and (iii) initial ion concentration (fitting to Langmuir, Freundlich and Langmuir–Freundlich equations). Furthermore, a complete characterization study (FTIR, XRD, SEM/EDAX, crystallinity, and cellulose content) demonstrated the surface morphology of the prepared hemp-materials along with some possible adsorption interactions between them and ions. The regeneration of materials was confirmed running desorption experiments (effect of solution pH on desorption) finding also the optimum desorption contact time (kinetics fitted to non-linear pseudo-first and -second order equations). Ten sequential reuse cycles (at the optimum conditions found after adsorption and desorption experiments) revealed the reuse potential of the low-cost hemp-based materials. This study investigates an alternative use of hemp-based materials either in hemp fiber (HF) or shive (HS) form as biosorbents for the removal of Ni(II) from aqueous solutions. The hemp materials were used either in raw form or after chemical modification with sodium hydroxide and citric acid in order to remove any impurities and add extra carboxyl groups (which improve the adsorption), respectively. A series of adsorption experiments was carried out to determine the effect of (i) solution pH on Ni(II) adsorption, (ii) contact time (kinetics fitted to linear pseudo-first, -second order equations and Elovich model), and (iii) initial ion concentration (fitting to Langmuir, Freundlich and Langmuir–Freundlich equations). Furthermore, a complete characterization study (FTIR, XRD, SEM/EDAX, crystallinity, and cellulose content) demonstrated the surface morphology of the prepared hemp-materials along with some possible adsorption interactions between them and ions. The regeneration of materials was confirmed running desorption experiments (effect of solution pH on desorption) finding also the optimum desorption contact time (kinetics fitted to non-linear pseudo-first and -second order equations). Ten sequential reuse cycles (at the optimum conditions found after adsorption and desorption experiments) revealed the reuse potential of the low-cost hemp-based materials. Terzopoulou, Zoi oth Nikolaidis, Vasileios oth Alexopoulou, Efthimia oth Bikiaris, Dimitrios N. oth Enthalten in Elsevier Moreno-Cabezali, Belen Maria ELSEVIER Application of a fuzzy-logic based model for risk assessment in additive manufacturing R&D projects 2020 an international journal devoted to fundamental aspects of structure, interactions and dynamic processes in simple, molecular and complex liquids New York, NY [u.a.] (DE-627)ELV004280490 volume:209 year:2015 pages:209-218 extent:10 https://doi.org/10.1016/j.molliq.2015.05.060 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 85.35 Fertigung VZ 54.80 Angewandte Informatik VZ AR 209 2015 209-218 10 045F 540 |
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Enthalten in Application of a fuzzy-logic based model for risk assessment in additive manufacturing R&D projects New York, NY [u.a.] volume:209 year:2015 pages:209-218 extent:10 |
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Kyzas, George Z. @@aut@@ Terzopoulou, Zoi @@oth@@ Nikolaidis, Vasileios @@oth@@ Alexopoulou, Efthimia @@oth@@ Bikiaris, Dimitrios N. @@oth@@ |
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low-cost hemp biomaterials for nickel ions removal from aqueous solutions |
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Low-cost hemp biomaterials for nickel ions removal from aqueous solutions |
abstract |
This study investigates an alternative use of hemp-based materials either in hemp fiber (HF) or shive (HS) form as biosorbents for the removal of Ni(II) from aqueous solutions. The hemp materials were used either in raw form or after chemical modification with sodium hydroxide and citric acid in order to remove any impurities and add extra carboxyl groups (which improve the adsorption), respectively. A series of adsorption experiments was carried out to determine the effect of (i) solution pH on Ni(II) adsorption, (ii) contact time (kinetics fitted to linear pseudo-first, -second order equations and Elovich model), and (iii) initial ion concentration (fitting to Langmuir, Freundlich and Langmuir–Freundlich equations). Furthermore, a complete characterization study (FTIR, XRD, SEM/EDAX, crystallinity, and cellulose content) demonstrated the surface morphology of the prepared hemp-materials along with some possible adsorption interactions between them and ions. The regeneration of materials was confirmed running desorption experiments (effect of solution pH on desorption) finding also the optimum desorption contact time (kinetics fitted to non-linear pseudo-first and -second order equations). Ten sequential reuse cycles (at the optimum conditions found after adsorption and desorption experiments) revealed the reuse potential of the low-cost hemp-based materials. |
abstractGer |
This study investigates an alternative use of hemp-based materials either in hemp fiber (HF) or shive (HS) form as biosorbents for the removal of Ni(II) from aqueous solutions. The hemp materials were used either in raw form or after chemical modification with sodium hydroxide and citric acid in order to remove any impurities and add extra carboxyl groups (which improve the adsorption), respectively. A series of adsorption experiments was carried out to determine the effect of (i) solution pH on Ni(II) adsorption, (ii) contact time (kinetics fitted to linear pseudo-first, -second order equations and Elovich model), and (iii) initial ion concentration (fitting to Langmuir, Freundlich and Langmuir–Freundlich equations). Furthermore, a complete characterization study (FTIR, XRD, SEM/EDAX, crystallinity, and cellulose content) demonstrated the surface morphology of the prepared hemp-materials along with some possible adsorption interactions between them and ions. The regeneration of materials was confirmed running desorption experiments (effect of solution pH on desorption) finding also the optimum desorption contact time (kinetics fitted to non-linear pseudo-first and -second order equations). Ten sequential reuse cycles (at the optimum conditions found after adsorption and desorption experiments) revealed the reuse potential of the low-cost hemp-based materials. |
abstract_unstemmed |
This study investigates an alternative use of hemp-based materials either in hemp fiber (HF) or shive (HS) form as biosorbents for the removal of Ni(II) from aqueous solutions. The hemp materials were used either in raw form or after chemical modification with sodium hydroxide and citric acid in order to remove any impurities and add extra carboxyl groups (which improve the adsorption), respectively. A series of adsorption experiments was carried out to determine the effect of (i) solution pH on Ni(II) adsorption, (ii) contact time (kinetics fitted to linear pseudo-first, -second order equations and Elovich model), and (iii) initial ion concentration (fitting to Langmuir, Freundlich and Langmuir–Freundlich equations). Furthermore, a complete characterization study (FTIR, XRD, SEM/EDAX, crystallinity, and cellulose content) demonstrated the surface morphology of the prepared hemp-materials along with some possible adsorption interactions between them and ions. The regeneration of materials was confirmed running desorption experiments (effect of solution pH on desorption) finding also the optimum desorption contact time (kinetics fitted to non-linear pseudo-first and -second order equations). Ten sequential reuse cycles (at the optimum conditions found after adsorption and desorption experiments) revealed the reuse potential of the low-cost hemp-based materials. |
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Low-cost hemp biomaterials for nickel ions removal from aqueous solutions |
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Terzopoulou, Zoi Nikolaidis, Vasileios Alexopoulou, Efthimia Bikiaris, Dimitrios N. |
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