【作者】 张全忠；

【导师】 王蓉艳； 梁斌；

【作者基本信息】 四川大学 ， 化学工程， 2001， 硕士

【摘要】 酚是一种普遍使用的化工原料，也是许多工业企业生产的副产物。随着排放标准的不断提高，含酚废水的处理难度愈来愈大。 本文研究了含酚废水的强化臭氧氧化法过程，结果表明：臭氧与酚的亲电加成反应分两个阶段进行，第一个阶段主要是臭氧同酚的直接作用，酚的降解呈线性关系；第二个阶段是臭氧同酚及其氧化中间产物的作用，呈抛物线关系。pH是该过程的关键控制参数，pH＞pKa时将大大提高反应速率，而溶液温度对酚的降解影响不大。不同曝气装置的对比实验表明，自吸式搅拌器相对于微孔曝气管具有气体分散性好、利用率高、能耗低的优点，传质效率较高。自制的锰系催化剂能有效改善臭氧处理含酚废水中色度难于控制的缺点，对COD_Cr的去除率能增大约20个百分点，氧化还原沉淀法制备锰系催化剂的适宜煅烧温度为t＝200℃。臭氧处理含酚废水的可生化性在不同反应时间内变化较大，一定时间内有所提高。在t＝26.5℃时，动力学模型模拟结果如下： pH＝3.10～9.00时，反应级数平均为n=0.73，化学反应速率常数k＝（2.7817～5.0873）×10（-2）（mol／1）^-0.73·min（-1）： pH＞9.0时，呈现出一级反应，速率常数k变化相对较大； K与pH、COD_Cr（mg／1）、[PhOHs]（mg／1）满足以下关联式： Ln（k）：-9.793-0.688 ln（pH）＋2.594 ln(COD_Cr)－2.403 ln（PhoHs） F检验表明，该关联式显著性较好。更多还原

【Abstract】 Phenol is a kind of fundamental chemical raw material, it is also a kind of by-products produced by many chemical industty Because of the critical effluent standard, It is more difficult to treat the wastewater contained phenol than before.The author researches the oxidation process of the wastewater contained phenol using Advanced Ozonation Processes, the results indicate: The electrophilic reaction between ozone and phenol have two stages, during the first stage, ozone molecular react mainly with phenol, the degradation of phenol is linear, however, in the second stage, it reacts with both phenol and its oxidation products, the degradation of phenol is parabola. During the treatment of wastewater contained phenol, pH is the key parameter, when pH > pKa, the reaction rate will increase rapidly; but the reaction~ temperature has little effect on the degradation of phenol by ozonation. The compared experiment of different gas dispersed equipment prove that self -sucked agitator has such advantages as good gas distribution, high ozone utilizing rate and lower mechanical energy consumed, it make the mass transfer efficiency very high compared with micro-gas bubble equipment. During the ozonation treatment processof wastewater polluted by phenol, Mn-catalyst make the color more easy to control than that of no catalyst, and it can increase about 20 percent points for the removal rate of CODEr based on the compared experiments. The best calcining temperature of manganese catalyst which made by the method of oxidation-revert is 200扖, using the raw material of Mn(N03)2 and KMnO4. The biodegradation of the effluent varies with the reaction time. At t =26.5CC, the modeling of kinetic model asV5following:When pL-I=3.1O-----9.OO, the mean reaction order is n=0.73, the chemical reaction rate constant k is between 2.7817 and 5.0873x102 (mol/L1073min?When pH > 9.0, the reaction order is n=l, but k change geatly. Based on the experimental data, k ~pH CQDc~ (mglL) and the concentration of phenol in the liquid are suitable the following relationship:ln(k) = -9.793 ?0.688 ln(pH) + 2.594 lfl(COD~r) ?2.403 ln(PhoHs) Compared with the standard F distribution value, the relationship is very good.更多还原