Colorimetric Method for Detection of Hydrazine Decomposition in Chemical Decontamination Process
| Autor: | So-Jin Park, Seonbyeong Kim, Jungsoon Park, Hee-Chul Eun, Changhyun Roh |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Control and Optimization
Hydrazine hydrazine decomposition Energy Engineering and Power Technology 010501 environmental sciences 01 natural sciences lcsh:Technology Nuclear decommissioning law.invention chemistry.chemical_compound law Nuclear power plant Electrical and Electronic Engineering Hydrogen peroxide Process engineering Engineering (miscellaneous) 0105 earth and related environmental sciences 010405 organic chemistry Renewable Energy Sustainability and the Environment business.industry lcsh:T Human decontamination Contamination Decomposition 0104 chemical sciences Azine nuclear energy chemistry decontamination technology Environmental science business chemical decontamination process Energy (miscellaneous) |
| Zdroj: | Energies Volume 12 Issue 20 Pages: 3967 Energies, Vol 12, Iss 20, p 3967 (2019) |
| ISSN: | 1996-1073 |
| DOI: | 10.3390/en12203967 |
| Popis: | The aim of nuclear facility decommissioning is to make local settlements safe, sustainable and professedly acceptable. The challenges are the clean-up of the nuclear site and waste management. This means a definite promise in terms of safety and security, taking into account social and environmental accountability. There is an essential need to develop safe and efficient methods for nuclear decommissioning. Thus, chemical decontamination technology is of great significance to the decommissioning of nuclear energy facilities. In particular, chemical decontamination technology is applicable to the pipelines and internal loop. The iron-rich oxides, such as Fe3O4 or NiOFe2O3, of a nuclear power plant should have sound decontamination follow-through and should put through a very small amount of secondary waste. It is important to be able to detect and quantify hydrazine in decontamination situations with high sensitivity and selectivity. A colorimetric assay is a technique used to determine the concentration of colored compounds in a solution. However, detecting targeted species rapidly and easily, and with high sensitivity and specificity, is still challenging. Here, the catalytic reaction of oxidants in the p-dimethylaminobenzaldehyde and hydrazine reaction is elucidated. Oxidants can catalyze the reaction of hydrazine and p-dimethylaminobenzaldehyde to form an azine complex such as p-dimethylaminobenzaldazine, with high selectivity and sensitivity within 30 min at ambient temperatures. In the absence of an oxidant such as iron or hydrogen peroxide no detectable colorimetric change was observed by the reaction of p-dimethylaminobenzaldehyde and hydrazine unless an external oxidant was present in the system. In this study, we demonstrated a colorimetric method for the sensitive detection of hydrazine decomposition in the chemical decontamination process. Furthermore, the colorimetric response was easy to monitor with the unaided eye, without any sophisticated instrumentation. This method is thus suitable for on-site detection of contamination in a nuclear facility. In addition, this colorimetric method is convenient, non-invasive, free of complex equipment, and low-cost, making it possible to analyze hydrazine in industrial nuclear facilities. The proposed method was successfully applied to the determination of hydrazine decomposition in the nuclear decontamination process. |
| Databáze: | OpenAIRE |
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