The petroleum contamination in soil is another pollution problem following pesticide and heavy metal in recent years. Petroleum is a kind of compound composed of alkane, cyclane and aromatics, which has the potentiality leading to cancer, deformity and mutation. The cleaning efficiency is poor in purifying natural acidic mixture consisting of crude oil and soil by routine measures, whereas sonochemical treatment has previously been shown to be an effective method to remediate soils contaminated with hydrocarbons.Sonochemical process is carried out in this research, which remediates the experimental beach fine soil contaminated with heavy oil. The effect of factors such as: slurry concentration, duration time of irradiation, slurry pH, alkaline additive and free radical reagent H2O2 on the desorption of hydrocarbon from fine salty soil, is considered. And it is proposed that solid-to-liquid mass ratio is 6: 1, working solution temperature is 20℃, irradiation time is 5 min, working solution pH is 9, alkali dosing of Na2COs is 0. 15 ％ at the time of using sonochemical process technique decontaminating petroleum hydrocarboncontaminated fine soil of beach. In addition, it is crucial for soil processing that some essential step should be taken to eliminate the concretion, which could assist the technique with an ideal final effect.%土壤的石油类有机污染物污染是近几年继农药和重金属之后的又一大污染.石油主要是由烷烃、环烷烃和芳香烃组成的混合物,具有致癌、致畸、致突变的潜在性.常规技术净化酸性的落地油泥的效果并不理想,而声化学处理以前就被认为是修复碳氢化合物污染土的一个有效方法.基于此,本研究对石油污染的海滨土开展了以声化学为技术手段的修复实验.在本实验研究中,泥浆浓度、清洗时间、温度、泥浆pH值、投加碱性添加剂与微量自由基试剂H<,2>O<,2>等因素对石油烃从细粒海滨土中的解吸效果的影响得到考虑.根据实验结果,在采用声化学工艺净化海滨细粒土时,建议工艺操作参数控制在液固比6:1、超声作用时间5 min、常温20℃、pH值9,Na<,2>CO<,3>的投加量为0.15%.另外,在处理过程中有必要采取措施及时避免清洗过程油泥造成的固结现象.
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