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本实验重点关注湖泊水源地突发性苯酚污染事故中底泥表层的污染情况,建立数学模型并通过模拟实验,对污染发生后36 h底泥中苯酚浓度的连续监测,研究了污染时间、底泥深度、温度和pH对扩散的影响,验证了与上述四个因素相关的数学模型。结果表明:由于底泥对苯酚存在吸附—脱吸作用,需要对扩散系数进行修正,并且对于不同的底泥组成其修正方式需要通过实验数据得出。
This experiment focused on the pollution of the surface sediment in the sudden phenol pollution accident of lake water source. The mathematical model was established and the phenol concentration in the sediment at 36 h after the pollution was continuously monitored through the simulation experiment. The pollution time, The effect of mud depth, temperature and pH on diffusion has validated the mathematical models related to the above four factors. The results show that due to the presence of adsorption and desorption of phenol by sediment, the diffusion coefficient needs to be corrected, and the correction method for different sediment composition needs to be obtained through experimental data.