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Journal AWWA - A Mechanistic Study of Ozone-Induced Particle Destabilization AWWA杂志——臭氧诱导颗粒失稳的机理研究
发布日期: 1991-06-01
本研究调查了臭氧对影响水处理系统中颗粒行为的几个水质参数的影响。最令人惊讶的结果之一是那些表明臭氧不起作用的结果。臭氧并没有降低AlCl3、FeCl3或明矾混凝剂的临界混凝剂浓度;使粒子不稳定;如果pH值保持不变,也可以改进颗粒去除过程。没有证据表明颗粒的有机涂层发生了破坏或解吸,或者,如果发生了破坏或解吸,则增强了颗粒的不稳定性。总之,这里观察到的所有臭氧引起的颗粒失稳现象主要是pH值降低、pH值升高或CaCO3沉淀的结果。由于通过化学添加、曝气或两者都能更有效地产生这些变化,且成本更低,因此在正确评估臭氧氧化对颗粒去除的真正好处时,必须考虑这些变化。 包括23个参考文献、表格和图表。
This study investigated the effects of ozone on several water quality parameters that affect particle behavior in water treatment systems. Among the most surprising results were those indicating what ozone did not do. Ozone did not decrease critical coagulant concentration for AlCl3, FeCl3, or alum coagulants; destabilize particles; or improve particle removal processes if pH was held constant. There was no evidence that disruption or desorption of the organic coatings of particles occurred or, if it did, that it enhanced particle destabilization. In sum, all ozone-induced particle destabilization phenomena observed here were primarily the result of pH decreases, pH increases, or precipitation of CaCO3. Because these changes are produced more effectively and at lower cost with chemical addition, aeration, or both, they must be considered in properly gauging the true benefits of ozonation with respect to particle removal. Includes 23 references, tables, figures.
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发布单位或类别: 美国-美国给水工程协会
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