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Article ; Online: Role of ion exchange membranes and capacitive electrodes in membrane capacitive deionization (MCDI) for CO

Legrand, L / Shu, Q / Tedesco, M / Dykstra, J E / Hamelers, H V M

Journal of colloid and interface science

2019 Volume 564, Page(s) 478–490

Abstract: Recently we showed that membrane capacitive deionization (MCDI) can be used to capture ... ...

Abstract	Recently we showed that membrane capacitive deionization (MCDI) can be used to capture CO
Language	English
Publishing date	2019-12-12
Publishing country	United States
Document type	Journal Article
ZDB-ID	241597-5
ISSN	1095-7103 ; 0021-9797
ISSN (online)	1095-7103
ISSN	0021-9797
DOI	10.1016/j.jcis.2019.12.039
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Solvent-Free CO

Legrand, L / Schaetzle, O / de Kler, R C F / Hamelers, H V M

Environmental science & technology

2018 Volume 52, Issue 16, Page(s) 9478–9485

Abstract: Capture of ... ...

Abstract	Capture of CO
MeSH term(s)	Adsorption ; Carbon Dioxide ; Electrodes ; Ions ; Water Purification
Chemical Substances	Ions ; Carbon Dioxide (142M471B3J)
Language	English
Publishing date	2018-08-10
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	1520-5851
ISSN (online)	1520-5851
DOI	10.1021/acs.est.8b00980
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Electrical energy from CO2 emissions by direct gas feeding in capacitive cells

Legrand, L. / Schaetzle, O. / Tedesco, M. / Hamelers, H.V.M.

Electrochimica Acta

2019 Volume 319

Abstract: ... CO2 and air gas directly into a capacitive cell. Hamelers et al. previously showed, that the available ...

Abstract	This work demonstrates the possibility to harvest electrical power from CO2 emissions by feeding CO2 and air gas directly into a capacitive cell. Hamelers et al. previously showed, that the available mixing energy of CO2 emitted into the air can be converted into electricity, but at high energy costs for gas-sparging in the process. In the present work, electrical power is generated by feeding the gas directly into the capacitive cell. We investigated three different cell designs (namely, “conventional”, “flow-by(wire)”, and “flow-by(flat)”), by changing both electrode and cell geometry. The flow-by(flat), inspired from fuel cell design, showed the best performance thanks to a high membrane potential (≈190 mV), which is the highest value so far reported from CO2 and air. A maximum membrane permselectivity between CO2 and air of 90% was obtained, i.e., almost double of values reported in previous studies. On the contrary, the “conventional” cell design gave poor performance due to non-optimal gas flow in the cell. We highlight the importance of water management and internal electrical resistance, to indicate directions for future developments of the technology.
Keywords	CO ; Capacitive cell ; Capacitive deionization ; Membrane potential ; Mixing energy
Subject code	621
Language	English
Publishing country	nl
Document type	Article ; Online
ZDB-ID	1483548-4
ISSN	0013-4686
ISSN	0013-4686
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Role of ion exchange membranes and capacitive electrodes in membrane capacitive deionization (MCDI) for CO2 capture

Legrand, L. / Shu, Q. / Tedesco, M. / Dykstra, J.E. / Hamelers, H.V.M.

Journal of Colloid and Interface Science

2020 Volume 564

Abstract: Recently we showed that membrane capacitive deionization (MCDI) can be used to capture CO2, but we found that the performance decreases with decreasing current density. In the present study, we investigate the effect of electrodes and ion exchange ... ...

Abstract	Recently we showed that membrane capacitive deionization (MCDI) can be used to capture CO2, but we found that the performance decreases with decreasing current density. In the present study, we investigate the effect of electrodes and ion exchange membranes by performing experiments with two membranes (CO2-MCDI), with one membrane (cation or anion exchange membrane), and without membranes (CO2-CDI). We find that the anion exchange membrane is essential to keep high CO2 absorption efficiencies (Λa=nCO2(g)/ncharge), while the absorption efficiency of the CO2-CDI cell was lower than expected (Λa≈0.5 for CO2-MCDI against Λa≈0.18 for CO2-CDI). Moreover, we theoretically investigate ion adsorption mechanisms in the electrodes by comparing experimental data of a CO2-CDI cell with theoretical results of the classic amphoteric-Donnan model developed for conventional CDI. By comparing the experimental results with the amph-D model, we find that the model overestimates the absorption efficiency in CO2-CDI experiments. To understand this discrepancy, we investigate the effects of other phenomena, i.e., (i) low ion concentration, (ii) passive CO2 absorption, and (iii) the effect of acid-base reactions on the chemical surface charge.
Keywords	Carbon electrodes ; Donnan model ; Electrochemical carbon capture ; MCDI
Subject code	612
Language	English
Publishing country	nl
Document type	Article ; Online
ZDB-ID	241597-5
ISSN	1095-7103 ; 0021-9797
ISSN (online)	1095-7103
ISSN	0021-9797
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Modeling permeate pH in RO membranes by the extended Donnan steric partitioning pore model

Zhang, L / Hamelers, H.V.M / Biesheuvel, P.M

Journal of membrane science. 2020 Nov. 01, v. 613

2020

Abstract: We investigate permeate pH across an RO membrane by modeling transport of ions including protons and hydroxide ions using the extended Donnan steric partitioning pore model (ext-DSP model). We show that membrane charge density plays an important role in ... ...

Abstract	We investigate permeate pH across an RO membrane by modeling transport of ions including protons and hydroxide ions using the extended Donnan steric partitioning pore model (ext-DSP model). We show that membrane charge density plays an important role in determining permeate pH, while the effect of flow rate and salt concentration are less significant. Depending on the polarity of the membrane charge, permeate pH may be lower or higher than feed pH, which indicates the necessity of a reliable membrane charging model. A general multi-site Langmuir charging model is formulated to characterize the membrane charging mechanism and constrain the model parameters. Besides, a simple formula of permeate pH based on the trans-membrane electrostatic potential difference is shown to be a good approximation to the full model prediction.
Keywords	artificial membranes ; ions ; models ; pH ; prediction ; protons ; salt concentration
Language	English
Dates of publication	2020-1101
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	194516-6
ISSN	0376-7388
ISSN	0376-7388
DOI	10.1016/j.memsci.2020.118511
Database	NAL-Catalogue (AGRICOLA)

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Article: Role of ion exchange membranes and capacitive electrodes in membrane capacitive deionization (MCDI) for CO2 capture

Legrand, L / Shu, Q / Tedesco, M / Dykstra, J.E / Hamelers, H.V.M

Journal of colloid and interface science. 2020 Mar. 22, v. 564

2020

Abstract	Recently we showed that membrane capacitive deionization (MCDI) can be used to capture CO2, but we found that the performance decreases with decreasing current density. In the present study, we investigate the effect of electrodes and ion exchange membranes by performing experiments with two membranes (CO2-MCDI), with one membrane (cation or anion exchange membrane), and without membranes (CO2-CDI). We find that the anion exchange membrane is essential to keep high CO2 absorption efficiencies (Λa=nCO2(g)/ncharge), while the absorption efficiency of the CO2-CDI cell was lower than expected (Λa≈0.5 for CO2-MCDI against Λa≈0.18 for CO2-CDI). Moreover, we theoretically investigate ion adsorption mechanisms in the electrodes by comparing experimental data of a CO2-CDI cell with theoretical results of the classic amphoteric-Donnan model developed for conventional CDI. By comparing the experimental results with the amph-D model, we find that the model overestimates the absorption efficiency in CO2-CDI experiments. To understand this discrepancy, we investigate the effects of other phenomena, i.e., (i) low ion concentration, (ii) passive CO2 absorption, and (iii) the effect of acid-base reactions on the chemical surface charge.
Keywords	absorption ; adsorption ; anion-exchange membranes ; carbon dioxide ; cations ; deionization ; electrodes ; models
Language	English
Dates of publication	2020-0322
Size	p. 478-490.
Publishing place	Elsevier Inc.
Document type	Article
ZDB-ID	241597-5
ISSN	1095-7103 ; 0021-9797
ISSN (online)	1095-7103
ISSN	0021-9797
DOI	10.1016/j.jcis.2019.12.039
Database	NAL-Catalogue (AGRICOLA)

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Article: Nanocapsules: a novel lipid formulation platform for platinum-based anti-cancer drugs.

Hamelers, Irene H L / de Kroon, Anton I P M

Journal of liposome research

2007 Volume 17, Issue 3-4, Page(s) 183–189

Abstract: Platinum-based anti-cancer agents have been used for many years to treat many different types of cancer. However, the efficacy of these drugs is limited by serious side effects. One of the strategies to reduce the side effects is encapsulation of the ... ...

Abstract	Platinum-based anti-cancer agents have been used for many years to treat many different types of cancer. However, the efficacy of these drugs is limited by serious side effects. One of the strategies to reduce the side effects is encapsulation of the drug in a lipid formulation. Recently, we discovered a novel method for the efficient encapsulation of cisplatin in a lipid formulation. The method is unique in that it does not generate conventional liposomes but nanocapsules: small aggregates of solid cisplatin covered by a lipid bilayer. Also carboplatin, a cisplatin-derived anti-cancer drug with different chemical properties, can be efficiently encapsulated by a similar method. The encapsulation in nanocapsules dramatically improves the in vitro cytotoxicity of the platinum drugs. Our results hold the promise that the nanocapsule technology could prove successful in the efficient encapsulation of many other (platinum-based) drugs, and thereby improve their therapeutic index and profile in vivo.
MeSH term(s)	Antineoplastic Agents/chemistry ; Carboplatin/chemistry ; Chemistry, Pharmaceutical ; Cisplatin/chemistry ; Humans ; Lipids/chemistry ; Nanocapsules
Chemical Substances	Antineoplastic Agents ; Lipids ; Nanocapsules ; Carboplatin (BG3F62OND5) ; Cisplatin (Q20Q21Q62J)
Language	English
Publishing date	2007-11-15
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	645173-1
ISSN	0898-2104
ISSN	0898-2104
DOI	10.1080/08982100701530290
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Article ; Online: Solvent-Free CO2 Capture Using Membrane Capacitive Deionization

Legrand, L. / Schaetzle, O. / De Kler, R.C.F. / Hamelers, H.V.M.

Environmental Science and Technology

2018 Volume 52, Issue 16

Abstract: Capture of CO2, originating from both fossil fuels, such as coal combustion, and from renewables, such as biogas, appears to be one of the greatest technological challenges of this century. In this study, we show that membrane capacitive deionization ( ... ...

Abstract	Capture of CO2, originating from both fossil fuels, such as coal combustion, and from renewables, such as biogas, appears to be one of the greatest technological challenges of this century. In this study, we show that membrane capacitive deionization (MCDI) can be used to capture CO2 as bicarbonate and carbonate ions produced from the reaction of CO2 with water. This novel approach allows capturing CO2 at room temperature and atmospheric pressure without the use of chemicals. In this process, the adsorption and desorption of bicarbonate ions from the deionized water solution drive the CO2(g) absorption-desorption from the gas phase. In this work, the effects of the current density and the CO2 partial pressure were studied. We found that between 55 and 75% of the electrical charge of the capacitive electrodes can be directly used to absorb CO2 gas. The energy requirement of such a system was found to be ∼40 kJ mol-1 at 15% CO2 and could be further improved by reducing the ohmic and non-ohmic energy losses of the MCDI cell.
Keywords	Life Science
Subject code	660
Language	English
Publishing country	nl
Document type	Article ; Online
ISSN	0013-936X
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Energy-Efficient Ammonia Recovery in an Up-Scaled Hydrogen Gas Recycling Electrochemical System

Kuntke, Philipp / Rodrigues, Mariana / Sleutels, Tom / Saakes, Michel / Hamelers, Hubertus V.M. / Buisman, Cees J.N.

ACS Sustainable Chemistry and Engineering

2018 Volume 6, Issue 6

Abstract: ... to 0.04 m2 to treat up to 11.5 L/day (∼46 gN/day) of synthetic urine. The system was operated stably ... h/kgN) at 50 A/m2 (prototype) to 23.4 kJ/gN (6.5 kW h/kgN) at 100 A/m2 (this work). At 100 A/m2 ...

Abstract	Nutrient and energy recovery is becoming more important for a sustainable future. Recently, we developed a hydrogen gas recycling electrochemical system (HRES) which combines a cation exchange membrane (CEM) and a gas-permeable hydrophobic membrane for ammonia recovery. This allowed for energy-efficient ammonia recovery, since hydrogen gas produced at the cathode was oxidized at the anode. Here, we successfully up-scaled and optimized this HRES for ammonia recovery. The electrode surface area was increased to 0.04 m2 to treat up to 11.5 L/day (∼46 gN/day) of synthetic urine. The system was operated stably for 108 days at current densities of 20, 50, and 100 A/m2. Compared to our previous prototype, this new cell design reduced the anode overpotential and ionic losses, while the use of an additional membrane reduced the ion transport losses. Overall, this reduced the required energy input from 56.3 kJ/gN (15.6 kW h/kgN) at 50 A/m2 (prototype) to 23.4 kJ/gN (6.5 kW h/kgN) at 100 A/m2 (this work). At 100 A/m2, an average recovery of 58% and a TAN (total ammonia nitrogen) removal rate of 598 gN/(m2 day) were obtained across the CEM. The TAN recovery was limited by TAN transport from the feed to concentrate compartment.
Keywords	Ammonia recovery ; Electrochemical system ; Hydrogen recycling ; Up-scaling
Subject code	660
Language	English
Publishing country	nl
Document type	Article ; Online
ISSN	2168-0485
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Interactions between estrogen and insulin-like growth factor signaling pathways in human breast tumor cells.

Hamelers, I H L / Steenbergh, P H

Endocrine-related cancer

2003 Volume 10, Issue 2, Page(s) 331–345

Abstract: Estrogens and insulin-like growth factors (IGFs) act as mitogens promoting cell proliferation in normal breast tissue as well as in breast carcinomas. Both hormones have been shown to play a role in the development of breast cancer and were found to ... ...

Abstract	Estrogens and insulin-like growth factors (IGFs) act as mitogens promoting cell proliferation in normal breast tissue as well as in breast carcinomas. Both hormones have been shown to play a role in the development of breast cancer and were found to activate multiple signaling pathways leading to proliferation of human breast cancer cell lines in vitro. Originally, it was considered that these agents manifest their mitogenic actions through separate pathways, but a growing body of evidence suggests that the IGF- and estrogen-mediated signaling pathways are intertwined. 17beta-Estradiol (E2) has been shown to enhance IGF signaling at multiple levels. E2 treatment of breast cancer cells alters expression of nearly all of the IGF family members including IGF-I, IGF-II, IGF-binding proteins, IGF type I receptor (IGF-RI), and insulin receptor substrate 1. The ligand-bound estrogen receptor has been reported to bind to and to activate the IGF-RI directly. Vice versa, IGF signaling has been reported to enhance estrogen receptor activation in human breast cancer cells by inducing phosphorylation of the estrogen receptor. Finally, several groups have described synergistic effects of the combination of E2 and IGF-I on S phase entry in breast tumor cell lines. Here, we review recent, often contradictory, reports describing the effects of E2 and IGFs on the proliferation of breast tumor cells, with special emphasis on the synergistic effects of the two hormones.
MeSH term(s)	Breast Neoplasms/metabolism ; Cell Division ; Estradiol/metabolism ; Female ; Humans ; Signal Transduction ; Somatomedins/metabolism ; Tumor Cells, Cultured
Chemical Substances	Somatomedins ; Estradiol (4TI98Z838E)
Language	English
Publishing date	2003-04-15
Publishing country	England
Document type	Journal Article ; Review
ZDB-ID	1218450-0
ISSN	1479-6821 ; 1351-0088
ISSN (online)	1479-6821
ISSN	1351-0088
DOI	10.1677/erc.0.0100331
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