Lili Huang, Yao Ge, Zhi Zheng, Dong Wang, Xinlei Wang, Liu Yang, Shengqiong Fang
{"title":"Co and S co-doped graphitic carbon nitride synergistically degrades carbamazepine in water with peroxymonosulfate","authors":"Lili Huang, Yao Ge, Zhi Zheng, Dong Wang, Xinlei Wang, Liu Yang, Shengqiong Fang","doi":"10.1016/j.jwpe.2025.107220","DOIUrl":null,"url":null,"abstract":"<div><div>Transition metals are frequently used to create catalysts that activate peroxymonosulfate (PMS) to degrade water contaminants. However, the degradation efficiency may be decreased if metal ions are released into the solution. In this work, a one-step calcination method was used to modify graphitic carbon nitride (CN) in the presence of Co and S. The synthesis of CoS₂ was notably aided by the doping of S, which also improved the degradation efficiency of CBZ by penetrating the tri-<em>s</em>-triazine ring of CN, which alters the electron distribution and speeds up the electron transfer efficiency between Co<sup>2+</sup> and Co<sup>3+</sup>. The Fenton-like reaction mechanism degrades carbamazepine (CBZ, C = 20 mg/L) by 98 % within 40 min when paired with PMS. When the pH value ranges between 5 and 9, the degradation efficiency of CBZ remains above 90 % even in the presence of humic acid and other anions. Sulphate radicals (SO₄<sup>−</sup>·) and superoxide radicals (O₂<sup>−</sup>·) were identified as the primary reactive oxygen species (ROS) involved in the reaction process. A believable CBZ degradation route was suggested. Additionally, the entire reaction process is environmentally safe due to the toxicity calculation.</div></div>","PeriodicalId":17528,"journal":{"name":"Journal of water process engineering","volume":"71 ","pages":"Article 107220"},"PeriodicalIF":6.3000,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of water process engineering","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2214714425002922","RegionNum":2,"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
Transition metals are frequently used to create catalysts that activate peroxymonosulfate (PMS) to degrade water contaminants. However, the degradation efficiency may be decreased if metal ions are released into the solution. In this work, a one-step calcination method was used to modify graphitic carbon nitride (CN) in the presence of Co and S. The synthesis of CoS₂ was notably aided by the doping of S, which also improved the degradation efficiency of CBZ by penetrating the tri-s-triazine ring of CN, which alters the electron distribution and speeds up the electron transfer efficiency between Co2+ and Co3+. The Fenton-like reaction mechanism degrades carbamazepine (CBZ, C = 20 mg/L) by 98 % within 40 min when paired with PMS. When the pH value ranges between 5 and 9, the degradation efficiency of CBZ remains above 90 % even in the presence of humic acid and other anions. Sulphate radicals (SO₄−·) and superoxide radicals (O₂−·) were identified as the primary reactive oxygen species (ROS) involved in the reaction process. A believable CBZ degradation route was suggested. Additionally, the entire reaction process is environmentally safe due to the toxicity calculation.
期刊介绍:
The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies