操作条件及水质对海水氯消毒过程中消毒副产物生成的影响

发布时间：2018-03-09 04:26

  本文选题：海水淡化　切入点：氯化消毒　出处：《环境工程》2016年03期 　论文类型：期刊论文

【摘要】：氯消毒广泛应用于海水利用的预处理过程中,以减少生物膜淤积,而消毒过程会导致各类消毒副产物(DBPs)的生成,可能会对海洋生态环境具有潜在危害。系统研究了操作条件和水质对海水氯化消毒过程中生成三卤甲烷(THMs)、卤乙腈(HANs)和卤乙酸(HAAs)的影响。结果表明,氯投加量对DBPs生成的影响最大,随着投氯量的增加,THMs、HANs和HAAs的生成量显著增加,在反应初期随反应时间的延长而增加,随后HANs和HAAs的生成量开始缓慢降低而THMs基本保持不变。随着温度升高,THMs的生成量稳步增加,而HAAs和HANs在分别达到30,25℃后生成量达到最大值,之后随温度的升高而降低。p H对THMs、HANs和HAAs生成的影响相反,在酸性条件下HANs和HAAs的生成量最多,而在碱性条件下THMs的生成量最多。THMs、HANs和HAAs的生成量随溴离子浓度的改变无明显变化,但是随着氨氮浓度的升高,THMs、HANs和HAAs的生成种类和生成量均有明显降低。
[Abstract]:Chlorine disinfection is widely used in the pretreatment process of seawater utilization to reduce the deposition of biofilm, and the disinfection process will lead to the formation of various disinfection by-products (DBPs). The effects of operating conditions and water quality on the formation of trihalomethane (THMsN), halogen acetonitrile (HANs) and haloacetic acid (HAASS) during chlorination of seawater were systematically studied. Chlorine dosage had the greatest effect on the formation of DBPs. With the increase of chlorine dosage, the production of THMsHANs and HAAs increased significantly, and increased with the prolongation of reaction time at the initial stage of the reaction. Then the production of HANs and HAAs began to decrease slowly, but THMs remained unchanged. With the increase of temperature, the production of HAAs and HANs increased steadily, while HAAs and HANs reached the maximum value after 30 鈩，

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