碘代类消毒副产物生成特性研究

发布时间：2018-01-24 01:43

本文关键词： 水处理消毒副产物碘代三卤甲烷检测方法影响因素　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：生活饮用水水质的优劣与人类健康密切相关。在水处理过程中，消毒剂在有效杀灭水中病原体、微生物的同时还会与水中的天然有机物产生多种对环境和人类健康有潜在危害的消毒副产物。目前，已经检测到的消毒副产物多达数百种，随着研究的深入和检测技术的改进，越来越多的消毒副产物被发现。碘代类消毒副产物就是一种新兴消毒副产物，相对于三氯甲烷、卤乙酸等常规消毒副产物而言，因其具有更强的细胞毒性和遗传特性而成为饮用水研究的新领域。本论文开展了碘代三卤甲烷的检测分析方法研究，研究考察了消毒过程中反应时间、加氯量、不同消毒剂投加顺序和Br-:I-等因素对碘代类消毒副产物生成量的影响，调查了我国不同地域的水源水中三卤甲烷和碘代类三卤甲烷的生成水平，掌握碘代类消毒副产物与常规消毒副产物之间的关系。对碘代类消毒副产物生成影响因素的研究表明，，氯在反应前60min可以快速氧化水中碘离子生成次碘酸从而生成碘代三卤甲烷；投氯量的变化对碘代三卤甲烷的生成量影响较大，但对各组组分分布的影响较小，六种碘代三卤甲烷副产物中二氯一碘甲烷检出率最高；实验证明碘离子浓度越高，生成碘代三卤甲烷种类越多;总碘代三卤甲烷的生成量随着Br-:I-比值的增加而显著下降;当Cl2/N为3时，碘代三卤甲烷的浓度被最大程度的抑制。通过调查我国不同地域10个水源地碘代三卤甲烷和三卤甲烷的生成水平，结果表明，水样中碘代三卤甲烷生成势浓度范围为3.29-18.93ug/L，总三卤甲烷生成势浓度范围为9.1-105.4μg/L；三卤甲烷消毒副产物中氯仿所占的比例最大，几乎占总三氯甲烷的70%以上；碘代类三卤甲烷与总三卤甲烷生成势的相关性较高，相关系数R2达0.8以上；原水中COD浓度越高，碘代三卤甲烷生成量就越多。
[Abstract]:The quality of drinking water is closely related to human health. In the process of water treatment, disinfectants are effective in killing pathogens in water. Microbes can also produce a variety of disinfection by-products with natural organisms in water that have potential harm to the environment and human health. At present, hundreds of disinfection by-products have been detected. With the development of research and the improvement of detection technology, more and more disinfection by-products have been found. Iodinated disinfection by-products are a new disinfection by-product, relative to trichloromethane. Haloacetic acid and other conventional disinfection by-products have become a new research field of drinking water because of their stronger cytotoxicity and genetic characteristics. In this paper, the method of detection and analysis of trihalomethane iodide was studied, and the reaction time and the amount of chlorine added during disinfection were investigated. The effects of different disinfectant dosing order and Br-: I- on the yield of disinfection by-products of iodide species were investigated. The formation levels of trihalomethane and trihalomethane iodide in different regions of China were investigated. To understand the relationship between the disinfection by-products of iodide and the routine disinfection by-products. The study on the factors influencing the formation of disinfection by-products of iodide shows that chlorine can quickly oxidize iodine ions in water to form hypoiodic acid and then form trihalomethane iodide 60 min before reaction. The change of chlorine dosage had a great influence on the production of trihalomethane, but had little effect on the distribution of each component. The detection rate of dichloromethane was the highest among the six by-products of trihalomethane iodide. The higher the concentration of iodide ion, the more kinds of trihalomethane iodide are produced. The total amount of trihalomethane iodide decreased with the increase of the ratio of Br- to I-. When Cl2/N is 3:00, the concentration of trihalomethane iodide is inhibited to the greatest extent. The formation levels of trihalomethane and trihalomethane in 10 water sources in different regions of China were investigated. The formation potential concentration range of trihalomethane in water is 3.29-18.93ugr / L, and the concentration range of total trihalomethane formation potential is 9.1-105.4 渭 g / L. Chloroform accounted for more than 70% of total trichloromethane in the disinfection by-products of trihalomethane. The correlation between trihalomethane and the formation potential of total trihalomethane is high, and the correlation coefficient R2 is more than 0.8. The higher the concentration of COD in raw water, the greater the amount of trihalomethane iodide.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU991.25

【参考文献】