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- W3010992190 endingPage "2023" @default.
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- W3010992190 abstract "Microelectrodes can be used to obtain chemical profiles within biofilm microenvironments. For example, sulfate (SO42−) and hydrogen sulfide (H2S) microelectrodes can be used to study sulfate reduction activity in this context. However, there is no SO42− microelectrode available for studying sulfate reduction in biofilms. In this study, SO42− and H2S microelectrodes were fabricated and applied in the measurement of a wastewater membrane-aerated biofilm (MAB) to investigate the in situ sulfate reduction activity. Both the SO42− and H2S microelectrodes with a tip diameter of around 20 micrometers were successfully developed and displayed satisfying selectivity to SO42− and H2S, respectively. The Nernstian slopes of calibration curves of the fabricated SO42− electrodes were close to −28.1 mV/decade, and the R2 values were greater than 98%. Within the selected concentration range from 10−5 M (0.96 mg/L) to 10−2 M (960 mg/L), the response of the SO42− microelectrode was log-linearly related to its concentration. The successfully fabricated SO42− microelectrode was combined with the existing H2S microelectrode and applied on an environmental wastewater biofilm sample to investigate the sulfate reduction activity within it. The H2S and SO42− microelectrodes showed stable responses and good performance, and the decrease of SO42− with an accompanying increased of H2S within the biofilm indicated the in situ sulfate reduction activity. The application of combined SO42− and H2S microelectrodes in wastewater biofilms could amend the current understanding of sulfate reduction and sulfur oxidation within environmental biofilms based on only H2S microelectrodes." @default.
- W3010992190 created "2020-03-23" @default.
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- W3010992190 date "2020-03-19" @default.
- W3010992190 modified "2023-09-25" @default.
- W3010992190 title "An Innovative in Situ Monitoring of Sulfate Reduction within a Wastewater Biofilm by H2S and SO42− Microsensors" @default.
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- W3010992190 doi "https://doi.org/10.3390/ijerph17062023" @default.
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