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  1. Article ; Online: Fe-zeolites for the adsorption and oxidative degradation of nitroaromatic compounds in water.

    Gawel, Alina / Sühnholz, Sarah / Georgi, Anett / Kopinke, Frank-Dieter / Mackenzie, Katrin

    Journal of hazardous materials

    2023  Volume 459, Page(s) 132125

    Abstract: Nitroaromatic compounds (NACs) are prominent explosives. In this context, these toxic substances were released into the environment and cause long-lasting groundwater contamination. In preparation of a possible in-situ remediation, colloidal Fe-zeolites ... ...

    Abstract Nitroaromatic compounds (NACs) are prominent explosives. In this context, these toxic substances were released into the environment and cause long-lasting groundwater contamination. In preparation of a possible in-situ remediation, colloidal Fe-zeolites were investigated for their capabilities as adsorbents and oxidation catalysts. It was shown that the Fe-zeolites FeBEA35 and FeFAU55 are potent inorganic adsorbents for NACs and simultaneously capable of activating H
    Language English
    Publishing date 2023-07-22
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1491302-1
    ISSN 1873-3336 ; 0304-3894
    ISSN (online) 1873-3336
    ISSN 0304-3894
    DOI 10.1016/j.jhazmat.2023.132125
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Electrochemical CO

    Gawel, Alina / Jaster, Theresa / Siegmund, Daniel / Holzmann, Johannes / Lohmann, Heiko / Klemm, Elias / Apfel, Ulf-Peter

    iScience

    2022  Volume 25, Issue 4, Page(s) 104011

    Abstract: For the efficient electrochemical conversion of ... ...

    Abstract For the efficient electrochemical conversion of CO
    Language English
    Publishing date 2022-03-04
    Publishing country United States
    Document type Journal Article ; Review
    ISSN 2589-0042
    ISSN (online) 2589-0042
    DOI 10.1016/j.isci.2022.104011
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Electrochemical CO

    Jaster, Theresa / Gawel, Alina / Siegmund, Daniel / Holzmann, Johannes / Lohmann, Heiko / Klemm, Elias / Apfel, Ulf-Peter

    iScience

    2022  Volume 25, Issue 4, Page(s) 104010

    Abstract: Tackling climate change is one of the undoubtedly most important challenges at the present time. This review deals mainly with the chemical aspects of the current status for converting the greenhouse gas ... ...

    Abstract Tackling climate change is one of the undoubtedly most important challenges at the present time. This review deals mainly with the chemical aspects of the current status for converting the greenhouse gas CO
    Language English
    Publishing date 2022-03-03
    Publishing country United States
    Document type Journal Article ; Review
    ISSN 2589-0042
    ISSN (online) 2589-0042
    DOI 10.1016/j.isci.2022.104010
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: In-situ treatment of herbicide-contaminated groundwater-Feasibility study for the cases atrazine and bromacil using two novel nanoremediation-type materials.

    Gawel, Alina / Seiwert, Bettina / Sühnholz, Sarah / Schmitt-Jansen, Mechthild / Mackenzie, Katrin

    Journal of hazardous materials

    2020  Volume 393, Page(s) 122470

    Abstract: Two injectable reactive and sorption-active particle types were evaluated for their applicability in permeable reaction zones for in-situ removal of herbicides ("nanoremediation"). As model substances, atrazine and bromacil were used, two herbicides ... ...

    Abstract Two injectable reactive and sorption-active particle types were evaluated for their applicability in permeable reaction zones for in-situ removal of herbicides ("nanoremediation"). As model substances, atrazine and bromacil were used, two herbicides frequently occurring in groundwater. In order to provide recommendations for best use, particle performance was assessed regarding herbicide degradation and detoxification. For chemical reduction, Carbo-Iron® was studied, a composite material consisting of zerovalent iron and colloidal activated carbon. Carbo-Iron reduced bromacil with increased activity compared to nanoscale zerovalent iron (nZVI). The sole reaction product, 3-sec-butyl-6-methyluracil, showed 500-fold increase in half-maximal-effect concentration (EC
    MeSH term(s) Adsorption ; Atrazine/chemistry ; Atrazine/toxicity ; Bromouracil/analogs & derivatives ; Bromouracil/chemistry ; Bromouracil/toxicity ; Carbon/chemistry ; Environmental Restoration and Remediation ; Feasibility Studies ; Groundwater/chemistry ; Herbicides/chemistry ; Herbicides/toxicity ; Iron/chemistry ; Nanoparticles/chemistry ; Oxidation-Reduction ; Scenedesmus/growth & development ; Water Pollutants, Chemical/chemistry ; Water Pollutants, Chemical/toxicity ; Zeolites/chemistry
    Chemical Substances Herbicides ; Water Pollutants, Chemical ; Zeolites (1318-02-1) ; Bromouracil (4HK400G5UO) ; Carbon (7440-44-0) ; Iron (E1UOL152H7) ; bromacil (I048FFR2J0) ; Atrazine (QJA9M5H4IM)
    Language English
    Publishing date 2020-03-05
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1491302-1
    ISSN 1873-3336 ; 0304-3894
    ISSN (online) 1873-3336
    ISSN 0304-3894
    DOI 10.1016/j.jhazmat.2020.122470
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Book ; Online: Electrochemical CO2 Reduction - The Macroscopic World of Electrode Design, Reactor Concepts & Economic Aspects

    Gawel, Alina / Jaster, Theresa / Siegmund, Daniel / Holzmann, Johannes / Lohmann, Heiko / Klemm, Elias / Apfel, Ulf-Peter

    2022  

    Abstract: Art. 104011, 36 S. ... For the efficient electrochemical conversion of CO2 into valuable chemical feedstocks, a well-coordinated interaction of all electrolyzer compartments is required. In addition to the catalyst, whose role is described in detail in the ...

    Abstract Art. 104011, 36 S.

    For the efficient electrochemical conversion of CO2 into valuable chemical feedstocks, a well-coordinated interaction of all electrolyzer compartments is required. In addition to the catalyst, whose role is described in detail in the part ""Electrochemical CO2 Reduction towards Multicarbon Alcohols - The Microscopic World of Catalysts & Process Conditions"" of this divided review, the general cell setups, design, and manufacture of the electrodes, membranes used, and process parameters must be optimally matched. The authors' goal is to provide a comprehensive review of the current literature on how these aspects affect the overall performance of CO2 electrolysis. To be economically competitive as an overall process, the framework conditions, i.e., CO2 supply and reaction product treatment, must also be considered. If the key indicators for current density, selectivity, cell voltage, and lifetime of a CO2 electrolyzer mentioned in the techno-economic consideration of this review are met, electrochemical CO2 reduction can make a valuable contribution to the creation of closed carbon cycles and to a sustainable energy economy.

    25

    Nr.4
    Keywords membrane ; CO2 reduction ; process
    Subject code 660
    Language English
    Publishing country de
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: In-situ treatment of herbicide-contaminated groundwater - Feasibility study for the cases atrazine and bromacil using two novel nanoremediation-type materials

    Gawel, Alina / Seiwert, Bettina / Sühnholz, Sarah / Schmitt-Jansen, Mechthild / Mackenzie, Katrin

    2020  

    Abstract: Art. 122470 ... Two injectable reactive and sorption-active particle types were evaluated for their applicability in permeable reaction zones for in-situ removal of herbicides (""nanoremediation""). As model substances, atrazine and bromacil were used, two ...

    Abstract Art. 122470

    Two injectable reactive and sorption-active particle types were evaluated for their applicability in permeable reaction zones for in-situ removal of herbicides (""nanoremediation""). As model substances, atrazine and bromacil were used, two herbicides frequently occurring in groundwater. In order to provide recommendations for best use, particle performance was assessed regarding herbicide degradation and detoxification. For chemical reduction, Carbo-Iron® was studied, a composite material consisting of zerovalent iron and colloidal activated carbon. Carbo-Iron reduced bromacil with increased activity compared to nanoscale zerovalent iron (nZVI). The sole reaction product, 3-sec-butyl-6-methyluracil, showed 500-fold increase in half-maximal-effect concentration (EC50) towards the chlorophyte Scendesmus vacuolatus compared to the parent compound. The detoxification based on dehalogenation confirmed the dependency of the specific mode-of-action on the carbon-halide bond. For atrazine, neither nZVI nor Carbo-Iron showed significant degradation under the conditions applied. As novel subsurface treatment option, Trap-Ox® zeolite FeBEA35 was studied for generation of in-situ permeable oxidation barriers. Both adsorbed atrazine and bromacil underwent fast unselective oxidation. The transformation products of the Fenton-like reaction were identified, and oxidation pathways derived. For atrazine, a 300-fold increase in EC50 for S. vacuolatus was found over the duration of the reaction, and a loss of phytotoxicity to non-detectable levels for bromacil.

    393
    Keywords ISCR- and ISCO-based groundwater treatment ; carbo-iron ; Trap-Ox zeolites ; reaction pathways ; high-throughput screening diagnostic algae test (hts-DAT) ; 363
    Subject code 660
    Language English
    Publishing country de
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

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