To investigate the effects of different oxidation systems and operating parameters on the degradation performance of soil PAHs,synthetic siderite(SFC)was artificially simulated and modified siderite(FFC)was obtained by introducing nZVI with excellent performance to catalyze the oxidative degradation of PAHs in actual contaminated site soil.The results showed that both SFC and FFC-catalyzed PDS systems were effective in degrading PAHs,and the soil PAHs degradation rate was further improved by optimizing the operating parameters,including lowering the initial pH,increasing the soil-to-water ratio and extending the reaction time.In addition,the use of H2O2 equivalent instead of PDS could reduce the treatment cost,but the degradation rate was slightly decreased.The results of soil toxicity assessment showed that the germination rate of ryegrass seeds was significantly increased after SFC/PDS and FFC/PDS treatments.The study indicated that SFC and FFC catalytic systems could effectively remediate PAHs-contaminated soil and reduce soil ecotoxicity.
关键词
菱铁矿/多环芳烃/催化/污染场地/原位化学氧化
Key words
siderite/polycyclic aromatic hydrocarbons/catalysis/contaminated sites/in-situ chemical oxidation
维普
万方数据