{"title":"Enhanced degradation and recycling of reactive dye wastewater using cobalt loaded MXene catalysts","authors":"Dawu Shu, Xinqi Zhang, Bo Han, Wanxin Li, Bingxin Wang, Chengshu Xu","doi":"10.1038/s41545-024-00391-w","DOIUrl":null,"url":null,"abstract":"Cobalt-based catalysts were synthesized using the molten metal salt method and applied for the degradation of reactive dyeing wastewater. The results demonstrated a degradation of 97.1% for the C.I. Reactive Red 195 solution under the following conditions: 1.0 g/L of Co@MXene, 3 g/L of peroxymonosulfate (PMS), treated at 25 oC for 36 min with initial pH of 7. After adding 20 g/L of NaCl, the dye degradation rate increased to 5.57 times compared to the original rate 0.0894 min−1, but the difference in final degradation was not significant. The enhanced degradation was attributed to the combined action of hydroxyl radicals (•OH), sulfate radicals (SO4•−), and singlet oxygen (1O2). Notably, the Co@MXene catalyst maintained a high dye degradation percentage of 93.5% even after being recycled ten times. The treated dye residue can be recycled for dyeing cotton fabrics with reactive dyes. This study achieves rapid treatment of dye wastewater with wide applicability and provides valuable insights into dye wastewater treatment and environmental remediation.","PeriodicalId":19375,"journal":{"name":"npj Clean Water","volume":" ","pages":"1-10"},"PeriodicalIF":10.4000,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41545-024-00391-w.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"npj Clean Water","FirstCategoryId":"5","ListUrlMain":"https://www.nature.com/articles/s41545-024-00391-w","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Cobalt-based catalysts were synthesized using the molten metal salt method and applied for the degradation of reactive dyeing wastewater. The results demonstrated a degradation of 97.1% for the C.I. Reactive Red 195 solution under the following conditions: 1.0 g/L of Co@MXene, 3 g/L of peroxymonosulfate (PMS), treated at 25 oC for 36 min with initial pH of 7. After adding 20 g/L of NaCl, the dye degradation rate increased to 5.57 times compared to the original rate 0.0894 min−1, but the difference in final degradation was not significant. The enhanced degradation was attributed to the combined action of hydroxyl radicals (•OH), sulfate radicals (SO4•−), and singlet oxygen (1O2). Notably, the Co@MXene catalyst maintained a high dye degradation percentage of 93.5% even after being recycled ten times. The treated dye residue can be recycled for dyeing cotton fabrics with reactive dyes. This study achieves rapid treatment of dye wastewater with wide applicability and provides valuable insights into dye wastewater treatment and environmental remediation.
npj Clean WaterEnvironmental Science-Water Science and Technology
CiteScore
15.30
自引率
2.60%
发文量
61
审稿时长
5 weeks
期刊介绍:
npj Clean Water publishes high-quality papers that report cutting-edge science, technology, applications, policies, and societal issues contributing to a more sustainable supply of clean water. The journal's publications may also support and accelerate the achievement of Sustainable Development Goal 6, which focuses on clean water and sanitation.