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Journal AWWA - DBP Formation During Chloramination AWWA期刊-氯胺化过程中DBP的形成
发布日期: 2000-06-01
在三种不同的水源上进行批量实验,以研究氯胺化过程中溶解有机卤素(DOX)、三卤甲烷(THM)、卤乙酸(HAAs)和卤化氰(CNX)的形成。作者使用预成型氯胺来检查pH值、氯与氨氮的质量比(Cl2与N)以及溴浓度对消毒副产物(DBP)形成的影响。在低pH和高Cl2-N比条件下,特定DBPs的形成以及组参数DOX最大,并遵循随pH增加和Cl2-N比降低而降低的总体趋势。溴的加入增加了溴代DBPs和DOX的浓度。这些实验表明,由于二卤乙酸的形成,氯胺化过程中HAA的形成比THM的形成更困难。 因为在本研究中测量的特定的DPs(THMS,六HAAS和CNX)占不超过DOX浓度的35%,因此公用事业可能在选择合适的氯胺酮条件时要考虑特定的DBPS和DOX。包括37个参考文献、表格、图表。
Batch experiments were conducted on three diverse water sources to study the formationof dissolved organic halogen (DOX), trihalomethanes (THMs), haloacetic acids (HAAs), and cyanogen halides (CNX) during chloramination. The authors used preformed chloramines to examine the effect of pH, mass ratio of chlorine to ammonia-nitrogen (Cl2 to N), and bromide concentration on disinfection byproduct (DBP) formation. Formation of specific DBPs as well as the group parameter DOX was greatest at low pH and high Cl2-to-N ratios and followed the general trend of decreasing with increasing pH and decreasing Cl2-to-N ratio. Bromide addition increased the concentration of bromine-substituted DBPs and DOX. These experiments demonstrated that because of dihaloacetic acid formation, HAA formation is more problematic during chloramination than THM formation. Because the specific DBPs measured in this research (THMs, six HAAs, and CNX) accounted for no more than 35 percent of the DOX concentration, utilities may want to consider both specific DBPs and DOX in selecting appropriate chloramination conditions. Includes 37 references, tables, figures.
分类信息
发布单位或类别: 美国-美国给水工程协会
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