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Rapid Catalytic Water Disinfection from Earth Abundant Ca 2 Fe 2 O 5 Brownmillerite

Water disinfection is a crucial challenge for humanity. Approaches that are effective, cheap, environmentally friendly, and do not promote gene exchange between bacteria are urgently required. Strongly oxidizing radicals are highly promising to achieve this as they lead to bacterial activation at hi...

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Published in:Advanced sustainable systems (Online) 2021-12, Vol.5 (12)
Main Authors: Vanags, Mārtiņš, Mežule, Linda, Spule, Arnita, Kostjukovs, Juris, Šmits, Krišjānis, Tamm, Aile, Juhna, Talis, Vihodceva, Svetlana, Käämbre, Tanel, Baumane, Larisa, Začs, Dzintars, Vasiliev, Grigory, Turks, Maris, Mierina, Inese, Sherrell, Peter C., Šutka, Andris
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container_issue 12
container_start_page
container_title Advanced sustainable systems (Online)
container_volume 5
creator Vanags, Mārtiņš
Mežule, Linda
Spule, Arnita
Kostjukovs, Juris
Šmits, Krišjānis
Tamm, Aile
Juhna, Talis
Vihodceva, Svetlana
Käämbre, Tanel
Baumane, Larisa
Začs, Dzintars
Vasiliev, Grigory
Turks, Maris
Mierina, Inese
Sherrell, Peter C.
Šutka, Andris
description Water disinfection is a crucial challenge for humanity. Approaches that are effective, cheap, environmentally friendly, and do not promote gene exchange between bacteria are urgently required. Strongly oxidizing radicals are highly promising to achieve this as they lead to bacterial activation at high efficiencies. However, sources to consistently generate these radicals are limited to high energy UV/H 2 O 2 treatments requiring a large energy input. Here the use of abundant, cheap, brownmillerite (Ca 2 Fe 2 O 5 ) is demonstrated as an efficient radical generation material under dark conditions, showing a seven order of magnitude decrease in bacterial concentration over 10 min. This decrease is attributed to the release of interlayer Ca 2+ from the layered structure of Ca 2 Fe 2 O 5 and hydroxyl radical generation. The efficacy of Ca 2 Fe 2 O 5 is demonstrated by disinfecting turbid sewage sludge. The identification of this cheap, abundant, and nontoxic antibacterial material will provide an opportunity for broad scale clean water generation globally, and address the United Nations’ Sustainable Development Goal of clean water and sanitation.
doi_str_mv 10.1002/adsu.202100130
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title Rapid Catalytic Water Disinfection from Earth Abundant Ca 2 Fe 2 O 5 Brownmillerite
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