Journal
SAINS MALAYSIANA
Volume 50, Issue 2, Pages 373-381Publisher
UNIV KEBANGSAAN MALAYSIA
DOI: 10.17576/jsm-2021-5002-09
Keywords
Ag(I) catalyst ion; Ce(IV) mediator ion; degradation; mediated electrochemical oxidation; NPE-10
Categories
Funding
- Analytical Chemistry Research Group, Institut Teknologi Bandung (Indonesia)
- Ministry of Research and Higher Education of Indonesia through Riset PUPT
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This study evaluated the electro-degradation potential of NPE-10 by MEO using Ce(IV) ionic mediator and observed the influence of Ag(I) ionic catalyst. It was found that the performance of MEO in degradation of NPE-10 improved when Ag(I) ionic catalyst was applied.
Nonylphenol ethoxylate (NPE-10) is a non-ionic surfactant that is synthesized from alkylphenol ethoxylate. The accumulation of NPE-10 in wastewater will endanger the ecosystem as well as the human being. Nowadays, NPE-10 can be degraded indirectly by using an electrochemical treatment by the advancement of technology. Thus, this study is aimed to evaluate the electro-degradation potential of NPE-10 by MEO using Ce(IV) ionic mediator. In addition, the influence of Ag(I) ionic catalyst in the performance of MEO for the degradation of NPE-10 was also observed. The potency of MEO technology in the NPE-10 degradation was evaluated by voltammetry technique and confirmed by titrimetry and LC-MS analysis. The results showed that in the absence of Ag(I) ionic catalyst, the degradation of NPE-10 by MEO was 85.93%. Furthermore, when the Ag(I) ionic catalyst was applied, the performance of MEO in degradation of NPE-10 was improved to 95.12%. The back titration using Ba(OH)(2) confirmed the formation of CO2 by 46.79%, whereas the redox titration shows the total of degradation organic compounds by 42.50%. It was emphasized by the formation of two new peaks in the LC-MS chromatogram. In summary, our results confirmed the potential of MEO technology for the NPE-10 degradation.
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