ELECTROCHEMICAL REDUCTION OF NITRATE ION BY MODIFIED ALUMINUM SHEETS AS ELECTROCATALYSTS: A NOVEL WATER TREATMENT METHOD
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Date
2022-04-27
Authors
Eid, Shorooq
Journal Title
Journal ISSN
Volume Title
Publisher
جامعة النجاح الوطنية
Abstract
Background: Nitrate contamination of surface and ground water has been an issue in many places of the world, which has harmful effects on human health and the environment, were wrong human practices, whether it is industrial or agricultural, have contributed in raising the percentage of pollution allowed according to the World Health Organization (WHO) in water, which we have to find a solution to this problem.
Aims: Our main goal of this study was to develop a simple, practical, and cost-effective method for reducing nitrate concentrations in aqueous solutions.
Methods: In this study we tested Al electrode and different Al modification electrodes: Al-graphite, Al-graphene, Al-Cu, Al-Cu-graphite, Al-graphite-Cu to remove nitrate from water, by using nitrate electrochemical reduction experiments.
Results: The products in these cases were NO2-, NH4+ and it’s expected to produce N2. The most efficient electrode was Al-Cu that can convert NO3- to N2 and the removal efficiency of nitrate 73.73%. The experiment of all electrodes was conducted on -1.8 volt.
Conclusion: By studying the kinetics of reduction for Al-Cu, the results indicate that the nitrate electro-reduction is approximately first order with respect to nitrate. XRD was conducted for Al-Cu, Al-graphite and Al-Cu-graphite. Effects of several parameters on Al-Cu electrode efficiency in nitrate ion reduction, such as time and initial nitrate concentration, have been studied. Stability and the electrode material were also studied under experimental conditions. The possibility of reusing Al-Cu electrode again was investigated as well.
Description
Background: Nitrate contamination of surface and ground water has been an issue in many places of the world, which has harmful effects on human health and the environment, were wrong human practices, whether it is industrial or agricultural, have contributed in raising the percentage of pollution allowed according to the World Health Organization (WHO) in water, which we have to find a solution to this problem.
Aims: Our main goal of this study was to develop a simple, practical, and cost-effective method for reducing nitrate concentrations in aqueous solutions.
Methods: In this study we tested Al electrode and different Al modification electrodes: Al-graphite, Al-graphene, Al-Cu, Al-Cu-graphite, Al-graphite-Cu to remove nitrate from water, by using nitrate electrochemical reduction experiments.
Results: The products in these cases were NO2-, NH4+ and it’s expected to produce N2. The most efficient electrode was Al-Cu that can convert NO3- to N2 and the removal efficiency of nitrate 73.73%. The experiment of all electrodes was conducted on -1.8 volt.
Conclusion: By studying the kinetics of reduction for Al-Cu, the results indicate that the nitrate electro-reduction is approximately first order with respect to nitrate. XRD was conducted for Al-Cu, Al-graphite and Al-Cu-graphite. Effects of several parameters on Al-Cu electrode efficiency in nitrate ion reduction, such as time and initial nitrate concentration, have been studied. Stability and the electrode material were also studied under experimental conditions. The possibility of reusing Al-Cu electrode again was investigated as well.
Keywords
water pollution, WHO, nitrate concentration, Al modification electrodes, electrochemical reduction experiments