以苯胺为目标污染物，研究HCO₃^-活化过硫酸钠（PDS）对苯胺的降解效果及机制，分别考察了HCO₃^-、PDS、苯胺质量浓度和初始pH对HCO₃^-/PDS体系降解苯胺的影响。结果表明，HCO₃^-可显著活化PDS降解苯胺，当HCO₃^-与PDS的投加摩尔比为5：1、初始pH为8.3时，10 mg/L苯胺240 min降解率为94.8%。过量HCO₃^-会与苯胺竞争活性氧（ROS），从而抑制苯胺降解；增加PDS浓度可进一步提高苯胺降解速率；20~100 mg/L苯胺降解率均大于87%；在pH 3.0~11.0范围内苯胺降解率在90.0%以上。自由基捕获和GC-MS分析结果表明苯胺降解机制为：在HCO^-₄和¹O₂作用下，苯胺被转化为对二苯酚和对苯醌，最终被矿化为CO₂和H₂O。

With aniline as target pollutant,the degradation effect and mechanism of aniline by HCO₃^- activated sodium persulfate (PDS) are studied.The effects of HCO₃^-,PDS,aniline concentration and initial pH on the degradation of aniline by HCO₃^-/PDS system are investigated.Results show that HCO₃^- can significantly activate PDS to degrade aniline.The degradation rate of 10 mg·L^-1 aniline can reach 94.8% in 240 min when the molar ratio of HCO₃^- to PDS is 5:1 and the initial pH is 8.3.Excessive HCO₃^- will compete with aniline for reactive oxygen species (ROS),thereby inhibiting aniline to degrade.Increasing the concentration of PDS can further improve the degradation rate of aniline.The degradation rates of 20-100 mg·L^-1 aniline exceed 87%.The degradation rate of aniline is above 90.0% in the pH range of 3.0-11.0.The results from free radical capture and GC-MS show that the degradation mechanism of aniline is as follows:under the action of HCO^-₄ and ¹O₂,aniline is converted to p-diphenol and p-benzoquinone,and ultimately mineralized to CO₂ and H₂O.

覃鼎浩(1996-),男,硕士研究生,研究方向为过硫酸盐高级氧化技术,1447515717@qq.com;金星龙(1973-),男,博士,教授,研究方向为环境污染分析与控制及环境安全评价,通讯联系人,xljin7911@126.com。