Maßgeschneiderte Adsorbentien im Anwendungsspektrum Bio-, Medizin- und Umwelttechnik

Thiesen, Peter; Niemeyer, Bernd

doi:10.1002/cite.200500003

Cited by 9 publications

(5 citation statements)

References 49 publications

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“…Ziel ist es, sowohl die Affinität als auch die Selektivität des Adsorbens zum Zielstoff zu optimieren. Von der richtigen Auswahl der Porengröße und -struktur (sterischer Effekt) über die Funktionalisierung des Trägermaterials bis zur Immobilisierung künstlicher oder natürlicher Liganden bestehen vielfältige Steuerungsmög-lichkeiten, die nicht isoliert zu betrachten sind [42]. So beeinflussen neben den Prozessparametern auch die Art der Vielstoffgemische und die wirtschaftlichen Rahmendaten wie Energiekosten, etc.…”

Section: Zusammenfassungunclassified

Effective Separation of Gas and Fluid Phases by Means of Selective Adsorption

Rosenfeld¹,

Peper

Täffner

et al. 2011

Chemie Ingenieur Technik

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Effective Separation of Gas and Fluid Phases by Means of Selective AdsorptionAdsorption is a versatile tool for the separation of low abundant molecules from complex mixtures. The affinity and selectivity of the adsorbents are crucial parameters for the efficiency of the separation process. This work provides an overview of the basic adsorption mechanisms and illustrates their relevance for technical applications based on own experimental data in bioprocess, environmental and safety engineering. Distinctive features between the adsorption from the gas and fluid phase, respectively, the differences between small molecules and interacting biomacromolecules are presented.

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Section: Zusammenfassungunclassified

Effective Separation of Gas and Fluid Phases by Means of Selective Adsorption

Rosenfeld¹,

Peper

Täffner

et al. 2011

Chemie Ingenieur Technik

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“…Concerning the possibilities for separate recovery of Ni(II) and Co(II), the application of highly selective adsorbents is required [9][10][11][12]. These can be produced by surface modification of the adsorbents with target-directed ligands [12][13][14]. Several studies have already shown the general possibility to bind Ni(II) and Co(II) by such adsorbents in batch experiments [10,11,[14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Towards sustainable battery recycling: selective dynamic adsorption of nickel(II) and cobalt(II) in an adsorbent fixed-bed reactor at elevated temperature

Robeck,

Horn

2024

Discov Chem Eng

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Caused by the scarce resources of critical heavy metals which are in high demand, e.g., for lithium-ion batteries, processes for the recovery of such materials for recycling are of high interest. Adsorption is an effective method in order to selectively separate metal ions from aqueous solutions. Unfortunately, the prerequisites in battery recycling, like acidic pH-value and high temperature, are in general impairing the adsorption process. In this study, the competitive dynamic adsorption of nickel(II) (Ni(II)) and cobalt(II) (Co(II)) by a silica adsorbent functionalized with amino-polycarboxylate derivative ligands (designated as HSU331) under recycling process conditions, (pH = 3.5, T = 20 °C, and T = 50 °C, respectively) and varying concentrations (Ni(II):Co(II) 1:1 (5.0, and 10 mmol·L−1, respectively), Ni(II):Co(II) 3:1 and 1:3 (3.0 mmol·L−1 and 1.0 mmol·L−1 vice versa)) were investigated. A displacement desorption of Co(II) in favor of the binding of Ni(II) was observed, achieving maximum loadings of 0.95 µmolNi(II)·µmolLigand−1 (28.3 mgNi(II)·gAdsorbent−1), and 0.48 µmolCo(II)·µmolLigand−1 (14.3 mgCo(II)·gAdsorbent−1) at T = 20 °C and 1.0 µmolNi(II)·µmolLigand−1 (29.9 mgNi(II)·gAdsorbent−1) and 0.18 µmolCo(II)·µmolLigand−1 (5.38 mgCo(II)·gAdsorbent−1) at T = 50 °C, respectively. These results demonstrate a distinctly selective separation of Ni(II) in the presence of Co(II) by HSU331, achieving an even higher efficiency at elevated temperatures.

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“…Particularly, adsorption represents an advantageous elimination method for heavy metal ions in aqueous phase because of low operational costs, efficient separation at low concentrations, and an adjustable selectivity towards a specific target component [14, 18, 22, 23]. Adsorption selectivity can be achieved by surface modification of an adsorbent matrix, like porous silica gels, with target-directed ligands [24, 25]. These matrix materials offer adjustable porosities according to the selected process conditions, defined structures, and immense possibilities of specific surface functionalization [25, 26].…”

Section: Introductionmentioning

confidence: 99%

“…Adsorption selectivity can be achieved by surface modification of an adsorbent matrix, like porous silica gels, with target-directed ligands [24, 25]. These matrix materials offer adjustable porosities according to the selected process conditions, defined structures, and immense possibilities of specific surface functionalization [25, 26].…”

Section: Introductionmentioning

confidence: 99%

Recovery Process for Critical Metals: Selective Adsorption of Nickel(II) from Cobalt(II) at Acidic Condition and Elevated Temperature

Kriese

Lassen

Niemeyer

2023

Adsorption Science & Technology

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Effective and sustainable separation processes for critical metals, especially for the physicochemically similar elements nickel and cobalt in battery recycling, are of great interest in the future. Selective adsorption represents a highly potential process for this purpose. In this publication, a silica adsorbent functionalized with an amino-polycarboxylate derivate (HSU331) was investigated regarding the selective adsorption of Ni(II) in the presence of Co(II) in acidic solution (pH range at equilibrium 1.8–2.3) at elevated temperature. Comparable maximum equilibrium loadings ( q max ) for Ni(II) and Co(II) of 0.59 μmol(Ni(II)) · μmol(Ligand)-1 (18.3 mg(Ni(II)) · g(Adsorbent)-1), and 0.52 μmol(Co(II)) · μmol(Ligand)-1 (16.0 mg(Co(II)) · g(Adsorbent)-1), respectively, were achieved at T = 50°C in single-component experiments. Under competitive conditions, the Ni(II) loading remained constant at 0.60 μmol(Ni(II)) · μmol(Ligand)-1 (18.4 mg(Ni(II)) · g(Adsorbent)-1), while the Co(II) loading drastically decreased to 0.09 μmol(Co(II)) · μmol(Ligand)-1 (2.7 mg(Co(II)) · g(Adsorbent)-1) in an equimolar dual-component system. Calculated stability constants of 3 · 103 and 0.7 · 103 L · mol-1, respectively, for the formed metal ion complexes of Ni(II) and Co(II) onto the adsorbent HSU331, clarify the clear selectivity of the adsorbent towards Ni(II) in the presence of Co(II) even at elevated temperature (T = 50°C).

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Maßgeschneiderte Adsorbentien im Anwendungsspektrum Bio-, Medizin- und Umwelttechnik

Cited by 9 publications

References 49 publications

Effective Separation of Gas and Fluid Phases by Means of Selective Adsorption

Effective Separation of Gas and Fluid Phases by Means of Selective Adsorption

Towards sustainable battery recycling: selective dynamic adsorption of nickel(II) and cobalt(II) in an adsorbent fixed-bed reactor at elevated temperature

Recovery Process for Critical Metals: Selective Adsorption of Nickel(II) from Cobalt(II) at Acidic Condition and Elevated Temperature

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