摘要
With the continuous detection of new pollutants in the water environment,their potential harm cannot be ignored.In order to explore an effective method to remove contaminants from wastewater,this paper presents an underwater bubble plasma(UBP)activated peroxymonosulfate(PMS)strategy for rapidly degrading the typical emerging contaminant tetracycline hydrochloride(TC)in water.The results indicate that,compared with UBP alone(41.1%),the UBP-PMS system(98.6%)exhibits significantly enhanced degradation ability,achieving a 57.5%increase in TC degradation rate under identical conditions while enabling long-term self-purification of wastewater without energy input within this system.In addition,we studied the effects of initial TC concentration,the type of working gas,the initial pH value of the solution,and the water matrix on the degradation performance of the UBP-PMS system.The anti-interference performance of the UBP-PMS system is proven to be strong,as six inorganic anions(HCO_(3)^(-),CO_(3)^(2-),NO_(3)^(-),HPO_(4)^(2-),SO_(4)^(2-)and Cl^(-))are added respectively to simulate the actual water environment.The contribution of different reactive species to the degradation process was evaluated qualitatively and quantitatively by electron spin resonance(ESR)and scavenger experiments,of which the largest contribution was·OH,followed by^(1)O_(2),ONOOH/O_(2)^(·-),SO_(4)^(·-)and hydrated electrons.The potential degradation pathways of TC were analyzed,and the toxicity of the degradation intermediates was evaluated by quantitative structureactivity relationship(QSAR)analysis,revealing a gradual reduction in TC toxicity under the co-treatment of UBP-PMS.This study provides a novel activation strategy involving UBP-PMS and provides valuable insights into the degradation properties and mechanisms of emerging pollutants in actual water bodies.
基金
supported by the National Natural Science Foundation of China(No.12075188)
the Natural Science Foundation of Sichuan Province(No.2024NSFSC0532)
the Sichuan Science and Technology Program(No.2024ZYD0061)
Open Project of National&Local Joint Engineering Research Center for Environmental Pollution Control of Petroleum and Petrochemicals(No.34880000-25ZC0607-0122)
State Industry-Education Integration Center for Medical Innovations at Xi’an Jiaotong University。
