【摘要】 以对羟基苯甲酸乙酯（EP）为目标污染物,考察了US/nZVI/H₂O₂系统中有机物污染物的降解特性。以US（超声波）、H₂O₂、nZVI（纳米零价铁）分别或联合对EP进行试验,使用控制变量法,检测不同操作参数和不同的H₂O₂、nZVI的量对EP降解的影响。结果表明,US/nZVI/H₂O₂联合系统对EP的降解存在协同作用,说明在US/nZVI/H₂O₂体系中,同时存在超声波的空化作用和nZVI的还原作用,nZVI和H₂O₂的存在大大提高了体系中羟基自由基的生成效率。更多还原

【Abstract】 Ethyl p-hydroxybenzoate（EP） was used as the target contaminant, and its degradation was analyzed by US/nZVI/H₂O₂ system. The effect of different operating parameters and different amounts of H₂O₂, nZVI on the degradation of EP was examined by a control variable method. US（ultrasonic）, H₂O₂, and nZVI（nano-zero-valent iron） were tested on EP alone and in combination. The results showed that the US/nZVI/H₂O₂ combined system had a synergistic effect on the degradation of EP, indicated that in the US/nZVI/H₂O₂ system, there were ultrasonic cavitation and nZVI reduction simultaneously. The presence of nZVI and H₂O₂ greatly increased the efficiency of hydroxyl radical generation in this system. The possible degradation pathways of EP were analyzed on the basis of data comparisons and previous reports.更多还原