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240114s2024 xx |||||o 00| ||eng c |
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|a 10.1002/wer.10974
|2 doi
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|a pubmed25n1223.xml
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|a (DE-627)NLM367049813
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|a (NLM)38214427
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Gao, Yan
|e verfasserin
|4 aut
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| 245 |
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|a Performance and microbial response to nitrate nitrogen removal from simulated groundwater by electrode biofilm reactor with Ti/CNT/Cu5-Pd5 catalytic cathode
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|c 2024
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 15.01.2024
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|a Date Revised 24.01.2024
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|a published: Print
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|a Citation Status MEDLINE
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|a © 2024 Water Environment Federation.
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|a To enhance the removal of nitrate nitrogen (NO3 - -N) in groundwater with a low C/N ratio, electrocatalytic reduction of NO3 - -N has received extensive attention since its electrons can be directly produced in situ while simultaneously providing a clean electronic donor of hydrogen for denitrifying bacteria. In this study, Ti/CNT/CuPd bimetallic catalytic electrodes with different copper-palladium (CuPd) ratios were prepared by electrodeposition onto carbon nanotube (CNT) using titanium (Ti) plates. The results showed that the NO3 - -N conversion rate by Ti/CNT/Cu5-Pd5 electrode was the highest (53.60%) compared with other CuPd electrode ratios because of the combined role of the copper's high NO3 - -N catalytic activity and the palladium's high N2 selectivity. A new type of electrode biofilm reactor (EBR) with Ti/CNT/Cu5-Pd5 cathode, biochar substrate was constructed to explore the removal ability of NO3 - -N in simulated low C/N groundwater. When the influent NO3 - -N concentration was 30 mg/L, under the condition of a 30 mA electronic current and hydraulic retention time (HRT) of 12 h, the removal rate of NO3 - -N could reach as high as 78.1 ± 1.2%, and the N2 conversion rate was 99.7%. The horizontal distribution of microbial communities in EBR showed that the denitrification capacity was significantly improved through the electrochemical catalytic reduction of the Ti/CNT/Cu5-Pd5 cathode and the supply of the hydrogen electron donor to autotrophic denitrogenerating microbes such as Anaerobacillus, Thauera, and Hydrophaga. This study provides a new bimetallic catalytic cathode to enhance the removal of NO3 - -N in groundwater with a low C/N ratio. PRACTITIONER POINTS: The Cu5Pd5/CNTs/Ti electrode is beneficial to the adsorption and reduction of NO3 - -N to N2 . The production of hydrogen electron donors by cathode promoted nitrogen degradation. Activated electrodes together with denitrifying microorganisms contributed to the improved N removal rate
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|a Journal Article
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|a Ti/CNT/Cu5-Pd5 cathode
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|a autotrophic denitrification
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|a bimetallic catalytic cathode
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|a electrode biofilm reactor
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|a nitrate nitrogen
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|a Nitrates
|2 NLM
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|a Titanium
|2 NLM
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|a D1JT611TNE
|2 NLM
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|a Nanotubes, Carbon
|2 NLM
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|a Nitrogen
|2 NLM
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|a N762921K75
|2 NLM
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|a Copper
|2 NLM
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|a 789U1901C5
|2 NLM
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|a Palladium
|2 NLM
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|a 5TWQ1V240M
|2 NLM
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|a Hydrogen
|2 NLM
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|a 7YNJ3PO35Z
|2 NLM
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| 700 |
1 |
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|a Shen, Jianing
|e verfasserin
|4 aut
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1 |
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|a Yinzhang, Hongyu
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Yang, Liuyan
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Water environment research : a research publication of the Water Environment Federation
|d 1998
|g 96(2024), 1 vom: 01. Jan., Seite e10974
|w (DE-627)NLM098214292
|x 1554-7531
|7 nnas
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| 773 |
1 |
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|g volume:96
|g year:2024
|g number:1
|g day:01
|g month:01
|g pages:e10974
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|u http://dx.doi.org/10.1002/wer.10974
|3 Volltext
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|a GBV_ILN_350
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|a AR
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|d 96
|j 2024
|e 1
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|c 01
|h e10974
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