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为解决黄河下游水厂臭氧-生物活性炭工艺中的溴酸盐控制问题,采用静态试验对该地区某含溴水库水进行臭氧化处理,研究其臭氧消耗特性与溴酸盐生成特性。研究结果表明:水中臭氧的衰减速率与有机物含量有关,有机物含量越高,则臭氧衰减越快;去离子水配水(不含有机物)中臭氧衰减基本符合一级反应动力学模型,反应速率常数均值为0.40 ks-1;实际黄河水中臭氧衰减过程可通过两阶段一级反应动力学模型较好地描述,其中快速反应阶段的反应速率常数均值为3.5 ks-1,慢速反应阶段的反应速率常数均值为0.64 ks-1;臭氧化过程中的溴酸盐生成速率与羟基自由基摩尔浓度c(.OH)之间存在明显的正相关关系。
In order to solve the problem of bromate control in ozone-biological activated carbon process in the lower reaches of the Yellow River, a static test was used to ozonize a bromine-containing water in the area to study its ozone depletion characteristics and bromate generation characteristics. The results show that the decay rate of ozone in water is related to the content of organic matter. The higher the content of organic matter, the faster the ozone decay. The decay of ozone in deionized water distribution (without organic matter) basically accords with the first-order reaction kinetics model. The average of reaction rate constant Is 0.40 ks-1. The actual process of ozone decay in the Yellow River can be well described by a two-stage first-order kinetic model, in which the mean value of the reaction rate constant in the rapid reaction stage is 3.5 ks-1, and the reaction rate constant in the slow reaction stage The average value was 0.64 ks-1. There was a significant positive correlation between the rate of bromate formation and the molar concentration of hydroxyl radicals c (.OH) during ozonation.