Visible light photocatalytic enhanced heterogeneous cobalt catalyzed peroxymonosulfate synergistic process to degradation atrazine: Efficiency, influencing factors, by-products removal and mechanism

IF 6.3 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Journal of Environmental Sciences-china Pub Date : 2025-04-01 DOI:10.1016/j.jes.2025.03.058

Qingkong Chen , Jieyu Xia , Fengjun Liu , Jianping Fan , Peng Yan , Mika Sillanpää

{"title":"Visible light photocatalytic enhanced heterogeneous cobalt catalyzed peroxymonosulfate synergistic process to degradation atrazine: Efficiency, influencing factors, by-products removal and mechanism","authors":"Qingkong Chen , Jieyu Xia , Fengjun Liu , Jianping Fan , Peng Yan , Mika Sillanpää","doi":"10.1016/j.jes.2025.03.058","DOIUrl":null,"url":null,"abstract":"<div><div>This study developed a novel heterogeneous Vis-Photo+Fenton-like system by integrating visible-light-responsive Co<sub>3</sub>O<sub>4</sub>/TiO<sub>2</sub> photocatalysis with peroxymonosulfate (PMS) activation for efficient atrazine (ATZ) degradation. The synergistic process achieved complete ATZ removal within 60 min under near-neutral pH (6.9), outperforming individual Fenton-like (39 %) and photocatalytic (24 %) processes. Key factors influencing the degradation efficiency included light sources (UV > visible), pH (optimal at 6.9), catalyst dosage (0.01 g Co<sub>3</sub>O<sub>4</sub>/TiO<sub>2</sub>), and PMS:ATZ molar ratio (1:2). The system exhibited a synergistic coefficient of 5.03 (degradation) and 1.97 (mineralization), attributed to enhanced radical generation and accelerated Co<sup>3+</sup>/Co<sup>2+</sup> redox cycling through photoinduced electron transfer. Intermediate analysis revealed dealkylation, dechlorination, and oxidation pathways, with reduced toxicity of by-products (e.g., CEAT, CIAT) confirmed by ecotoxicity assessments. The mineralization efficiency (Vis-Photo+Fenton-like) reached 83.1 %, significantly higher than that of standalone processes (Fenton-like: 43.2 %; photocatalysis: 30.5 %). The catalyst demonstrated excellent stability (nearly 90 % recovery, < 1 μg/L Co leaching) and practical applicability. This study provides an efficient, sludge-free, and solar-compatible strategy for eliminating persistent herbicides in water treatment.</div></div>","PeriodicalId":15788,"journal":{"name":"Journal of Environmental Sciences-china","volume":"159 ","pages":"Pages 166-177"},"PeriodicalIF":6.3000,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Environmental Sciences-china","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1001074225001767","RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}

引用次数: 0

Abstract

This study developed a novel heterogeneous Vis-Photo+Fenton-like system by integrating visible-light-responsive Co₃O₄/TiO₂ photocatalysis with peroxymonosulfate (PMS) activation for efficient atrazine (ATZ) degradation. The synergistic process achieved complete ATZ removal within 60 min under near-neutral pH (6.9), outperforming individual Fenton-like (39 %) and photocatalytic (24 %) processes. Key factors influencing the degradation efficiency included light sources (UV > visible), pH (optimal at 6.9), catalyst dosage (0.01 g Co₃O₄/TiO₂), and PMS:ATZ molar ratio (1:2). The system exhibited a synergistic coefficient of 5.03 (degradation) and 1.97 (mineralization), attributed to enhanced radical generation and accelerated Co³⁺/Co²⁺ redox cycling through photoinduced electron transfer. Intermediate analysis revealed dealkylation, dechlorination, and oxidation pathways, with reduced toxicity of by-products (e.g., CEAT, CIAT) confirmed by ecotoxicity assessments. The mineralization efficiency (Vis-Photo+Fenton-like) reached 83.1 %, significantly higher than that of standalone processes (Fenton-like: 43.2 %; photocatalysis: 30.5 %). The catalyst demonstrated excellent stability (nearly 90 % recovery, < 1 μg/L Co leaching) and practical applicability. This study provides an efficient, sludge-free, and solar-compatible strategy for eliminating persistent herbicides in water treatment.

Abstract Image

查看原文本刊更多论文

可见光催化增强非均相钴催化过氧单硫酸盐协同降解阿特拉津：效率、影响因素、副产物去除及机理

本研究通过将Co3O4/TiO2光催化与过氧单硫酸盐（PMS）活化相结合，开发了一种新型的非均相可见光-光+Fenton-like体系，用于高效降解阿特拉津（ATZ）。在接近中性的pH值（6.9）下，协同工艺在60分钟内完全去除了ATZ，优于单个Fenton-like工艺（39%）和光催化工艺（24%）。影响降解效率的关键因素包括光源(UV >；pH（最佳值为6.9），催化剂用量（0.01 g Co3O4/TiO2）， PMS:ATZ摩尔比（1:2）。该体系的协同系数为5.03（降解）和1.97（矿化），这主要归因于通过光诱导电子转移促进自由基生成和加速Co3+/Co2+氧化还原循环。中间分析显示脱烷基、脱氯和氧化途径，副产物（如CEAT、CIAT）的毒性降低，经生态毒性评估证实。矿化效率（Vis-Photo+Fenton-like）达到83.1%，显著高于独立过程(Fenton-like: 43.2%；光催化：30.5%)。该催化剂表现出优异的稳定性(回收率接近90%，<；1 μg/L Co浸出)及实用性。本研究为消除水处理中的持久性除草剂提供了一种高效、无污泥和太阳能兼容的策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Environmental Sciences-china 环境科学-环境科学

CiteScore

13.70

自引率

0.00%

发文量

6354

审稿时长

2.6 months

期刊介绍： The Journal of Environmental Sciences is an international journal started in 1989. The journal is devoted to publish original, peer-reviewed research papers on main aspects of environmental sciences, such as environmental chemistry, environmental biology, ecology, geosciences and environmental physics. Appropriate subjects include basic and applied research on atmospheric, terrestrial and aquatic environments, pollution control and abatement technology, conservation of natural resources, environmental health and toxicology. Announcements of international environmental science meetings and other recent information are also included.