苏北某给水厂初步设计文献综述

 2023-05-05 09:05

文献综述

饮用水臭氧氧化技术摘要: 饮用水源地藻华会释放大量藻类有机物(AOM),AOM与氯消毒剂反应生成的消毒副产物(DBPs)会有不可忽略的健康风险给饮用水用户。

探究了臭氧/氯消毒对AOM结构和DBPs生成的影响。

结果表明,臭氧氧化能有效去除AOM中芳香蛋白和酚类、叶绿素 a、藻蓝蛋白结构物质,但是对腐殖酸类结构的去除效果相对较差。

DBPs生成总量随臭氧投加浓度的升高而增加,其中主要是三氯甲烷(TCM);卤代乙腈和卤代酮的生成总量随臭氧投加浓度的变化趋势不明显。

延长臭氧接触时间会明显增加1 h氯化中TCM的生成量,氯化24h时DBPs生成总量与臭氧接触时间无关。

在臭氧/氯消毒过程中,AOM的DBPs生成潜能低于天然有机物(NOM)。

AOM有利于一溴一氯乙腈的生成,而NOM会生成更多的二氯乙腈。

关键词: 藻类有机物; 臭氧氧化; 氯消毒; 消毒副产物; 天然有机物 Abstract: Algae blooms in drinking water sources will release a large amount of algal organic matter ( AOM) ,and disinfection by-products ( DBPs) generated by the reaction of AOM and chlorine will bring significant health risks to drinking water users. Therefore,the effects of ozonation /chlorine disinfection on AOM structure and DBPs formation were explored.Ozonation could effectively remove aromatic proteins,phenols,chlorophyll a and phycocyanin in AOM,but the removal efficiency of humic acid-like structure was relatively lower than the other structures. The total DBPs production increased with the increase of ozone concentration,among which was mainly trichloromethane ( TCM) . The total production of haloacetonitriles and halocatones did not change significantly with the ozone concentration. Increasing the contact time of ozone would obviously enhance the TCM formation in the subsequent 1 h chlorination,but it had no effect on the formation of DBPs in the subsequent 24 h chlorination. During ozonation /chlorine disinfection,the DBPs formation potential of AOM was lower than that of natural organic matter ( NOM) . AOM facilitated the formation of bromochloroacetonitrile,while NOM favored the formation of dichloroacetonitrile. Key words: algal organic matter; ozonation; chlorine disinfection; disinfection by-products.0.引言臭氧具有较强的氧化能力,在水中反应速度快、无污染。

文章介绍了臭氧的性质,臭氧氧化在水处理中的反应机理,以及臭氧氧化及臭氧联合技术在工业污水、废水、工业循环冷却水、饮用水、回用水、再生水等水处理中的应用情况和建议。

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