摘要
随着农药污染的日益严重,开发高效、环境友好的降解技术成为水处理领域的重要研究方向。采用水热法合成CuO纳米颗粒,并将其作为超声辅助催化剂用于水中吡虫啉(IMI)的降解。通过X射线衍射(XRD)和扫描电镜(SEM)表征,证实CuO具有良好的催化性能。实验结果表明,超声波(US)辐照与CuO、过一硫酸盐(PMS)之间存在协同效应,可提升IMI降解效率。在IMI初始质量浓度为10 mg/L、初始pH为7、温度为25℃、超声功率为100 W、PMS质量浓度为0.3 g/L、CuO用量为0.3 g/L的条件下,反应30 min,IMI降解率达到97%左右。活性物质淬灭实验研究证实,羟基自由基(·OH)和硫酸根自由基(SO_(4)^(-)·)在降解过程中起主导作用。研究表明,CuO/US/PMS体系具有高效性和环境友好性,为水体中IMI污染物的处理提供了新的技术参考。
With the increasing severity of pesticide pollution,the development of efficient and environmentally friendly degradation technologies have become a crucial research direction in the field of water treatment.CuO nanoparticles were synthesized via a hydrothermal method and employed as an ultrasound-assisted catalyst for the degradation of imidacloprid(IMI)in water.The catalytic performance of CuO was confirmed through characterization using X-ray diffraction(XRD)and scanning electron microscopy(SEM).Experimental results demonstrated a synergistic effect between ultrasound irradiation(US),CuO and peroxymonosulfate(PMS),significantly enhancing the degradation efficiency of IMI.Under the conditions of IMI initial mass concentration of 10 mg/L,initial pH of 7,temperature of 25℃,ultrasonic power of 100 W,PMS mass concentration of 0.3 g/L,and CuO dosage of 0.3 g/L,the degradation rate of IMI reached about 97% after 30 min of reaction.Quenching experiments confirmed that hydroxyl radicals(·OH)and sulfate radicals(SO_(4)^(-)·)played a dominant role in the degradation process.The study indicated that the CuO/US/PMS system exhibited high efficiency and environmental friendliness,providing a new technical reference for the treatment of IMI pollutants in water bodies.
作者
李蓉
张宗元
李启武
赵佳
LI Rong;ZHANG Zongyuan;LI Qiwu;ZHAO Jia(School of Environment and Ecology,Hunan Agricultural University,Changsha Hunan 410128;Changsha Ecological Environment Monitoring Center in Hunan Province,Changsha Hunan 410001)
出处
《环境污染与防治》
北大核心
2025年第3期74-80,共7页
Environmental Pollution & Control
基金
2020年湖南省教育厅科学研究项目(湘教通〔2020〕264号20B279)。
关键词
超声催化
CUO
吡虫啉
过一硫酸盐
ultrasonic catalyse
CuO
imidacloprid
peroxymonosulfate
作者简介
第一作者:李蓉,女,1997年生,硕士研究生,研究方向为环境污染物降解与检测;通信作者:赵佳。
