The self-designed reactor to achieve efficient degradation of polyvinyl alcohol under high-pressure and high-temperature conditions.

Autor: Zhu G; School of Textile, Jiangsu Province Engineering Research Center of Special Functional Textile Materials, Changzhou Textile Garment Institute, Changzhou, People's Republic of China., Shi C; College of Textile Science and Engineering (International Institute of Silk), Zhejiang Sci-Tech University, Hangzhou, People's Republic of China.
Jazyk: angličtina
Zdroj: Environmental technology [Environ Technol] 2025 Jan; Vol. 46 (1), pp. 25-36. Date of Electronic Publication: 2024 Apr 07.
DOI: 10.1080/09593330.2024.2336893
Abstrakt: A huge amount of polyvinyl alcohol (PVA) fabric is abandoned from nuclear power plants every year, the traditional treatment process will occupy land resources and pollute the environment; therefore, a lot of research has been carried out on the chemical treatment of PVA fabric. Herein, the performance of degradation of polyvinyl alcohol under high-pressure and high-temperature conditions is investigated. The effects of the initial pH value, reaction temperature, molar ratio of H 2 O 2 /Fe 2+ , and H 2 O 2 dosage on PVA degradation were evaluated. In the tested ranges in this work, the degradation of PVA fabric via high-pressure and high-temperature method was optimum at the initial pH value of 4, reaction temperature of 300℃, molar ratio of H 2 O 2 /Fe 2+ as 10, and H 2 O 2 dosage of 13 g/L. The PVA removal rate and TOC removal rate were 99.99% and 97.36%, respectively. Meanwhile, the high-pressure and high-temperature methods also had a great effect on the removal of Rhodamine-B and Reactive Red X-3B, the removal rates of Rhodamine-B and Reactive Red X-3B were 99.83% and 99.76%, respectively. The reaction mechanism of high-pressure and high-temperature methods was also discussed in this study.
Databáze: MEDLINE