School of Environmental Science and Technology, Tianjin University, Yaguan Road 135, Tianjin, 300350, China.
College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tong Yan Road 38, Tianjin, 300350, China.
Chemosphere. 2017 Aug;181:224-231. doi: 10.1016/j.chemosphere.2017.04.028. Epub 2017 Apr 15.
This study investigated the potential formation of disinfection byproducts (DBPs) during chlorination and chloramination of 20 water samples collected from different points of Yuqiao reservoir in Tianjin, China. The concentrations of dissolved organic matter and ammonia decreased downstream the reservoir, while the specific UV absorbance (SUVA: the ratio of UV to dissolved organic carbon) increased [from 0.67 L/(mgm) upstream to 3.58 L/(mgm) downstream]. The raw water quality played an important role in the formation of DBPs. During chlorination, haloacetic acids (HAAs) were the major DBPs formed in most of the water samples, followed by trihalomethanes (THMs). CHCl and CHClBr were the major THM species, while trichloroacetic acid (TCAA) and dichloroacetic acid (DCAA) were the major HAA species. Chloramination, on the other hand, generally resulted in lower concentrations of THMs (CHCl), HAAs (TCAA and DCAA), and haloacetonitriles (HANs). All the species of DBPs formed had positive correlations with the SUVA values, and HANs had the highest one (R = 0.8). The correlation coefficients between the analogous DBP yields and the SUVA values in chlorinated samples were close to those in chloraminated samples.
本研究调查了在中国天津于桥水库不同点位采集的 20 个水样在氯化和氯胺化过程中潜在消毒副产物（DBPs）的形成情况。水样中溶解有机物和氨的浓度沿水流方向下降，而特定紫外吸光度（SUVA：紫外吸光度与溶解有机碳的比值）增加[上游为 0.67 L/（mg·m），下游为 3.58 L/（mg·m）]。原水水质对 DBPs 的形成起着重要作用。在氯化过程中，卤乙酸（HAAs）是大多数水样中形成的主要 DBPs，其次是三卤甲烷（THMs）。CHCl 和 CHClBr 是主要的 THM 物质，而三氯乙酸（TCAA）和二氯乙酸（DCAA）是主要的 HAA 物质。相比之下，氯胺化通常会导致 THMs（CHCl）、HAAs（TCAA 和 DCAA）和卤乙腈（HANs）的浓度降低。形成的所有 DBPs 种类都与 SUVA 值呈正相关，而 HANs 的相关性最高（R=0.8）。氯化样品中类似 DBPs 产率与 SUVA 值之间的相关系数与氯胺化样品中的相关系数相近。
