城市供水管网中PPCPs空间分布规律
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摘要
药物和个人护理品(PPCPs)的残存物对生态系统乃至人类的健康已经构成了严重的潜在威胁,因其会经由各种途径被排放到饮用水水源中,故对供水管网中PPCPs的污染情况应予以关注。通过对枝状和环状两种不同类型供水管网中PPCPs污染状况和空间分布情况进行研究,发现在两种供水管网中均存在多种PPCPs污染物。枝状输水干管中PPCPs的检出浓度最大值为17.90 ng/L,随着管段的延伸,部分PPCPs污染物的浓度会呈现指数型衰减,衰减函数的底数范围为0.04~0.51。经过3 km的出厂输送距离后,几乎所有PPCPs浓度均降至检测限以下。在环状配水管网中,PPCPs检出的最大浓度为3.80 ng/L,总浓度为6.23~13.54 ng/L。各目标PPCPs污染物在环状配水管网中的检出结果表明,不同PPCPs污染物在环状配水管网中分布的均匀性存在明显差异。
Pharmaceutical and personal care products( PPCPs),which are discharged into drinking water sources through various pathways,will pose a potential threat to the ecosystem and the public health. Therefore,the pollution of PPCPs in water supply system should be greatly concerned. Based on the study of the PPCPs pollution status and spatial distribution in the dendritic and annular water supply networks,a variety of PPCPs pollutants were identified in both types of water supply networks. In the dendritic water supply network,the concentrations of PPCPs were detected at a maximum of 17. 90 ng/L,and some of the PPCPs concentrations decreased exponentially with the extension of the pipeline. The exponential function base was in the range of 0. 04-0. 51. Almost all PPCPs concentrations declined below the detection limit after a delivery distance of 3 km. In the annular water distribution network,the concentrations of PPCPs were detected at a maximum of 3. 80 ng/L,and the total PPCPs concentrations were in the range of 6. 23-13. 54 ng/L. The results of the targeting PPCPs pollutants showed that there were substantial differences in the distribution of different PPCPs pollutants in the annular water distribution network.
Pharmaceutical and personal care products( PPCPs),which are discharged into drinking water sources through various pathways,will pose a potential threat to the ecosystem and the public health. Therefore,the pollution of PPCPs in water supply system should be greatly concerned. Based on the study of the PPCPs pollution status and spatial distribution in the dendritic and annular water supply networks,a variety of PPCPs pollutants were identified in both types of water supply networks. In the dendritic water supply network,the concentrations of PPCPs were detected at a maximum of 17. 90 ng/L,and some of the PPCPs concentrations decreased exponentially with the extension of the pipeline. The exponential function base was in the range of 0. 04-0. 51. Almost all PPCPs concentrations declined below the detection limit after a delivery distance of 3 km. In the annular water distribution network,the concentrations of PPCPs were detected at a maximum of 3. 80 ng/L,and the total PPCPs concentrations were in the range of 6. 23-13. 54 ng/L. The results of the targeting PPCPs pollutants showed that there were substantial differences in the distribution of different PPCPs pollutants in the annular water distribution network.
引文
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[2]Kümmerer K.Antibiotics in the aquatic environment-A review-PartⅠ[J].Chemosphere,2009,75(4):417-434.
[3]Kümmerer K.Antibiotics in the aquatic environment-A review-PartⅡ[J].Chemosphere,2009,75(4):435-441.
[4]吴维.天津市供水系统中抗生素检测与控制方法的研究[D].天津:天津大学,2012.
[5]邵茁,李鑫,邵蓊,等.不同供水水质管网余氯衰减规律分析[J].供水技术,2013,7(2):19-21.
[6]刘奇,魏东斌,陈振斌,等.医药品和个人护理用品(PPCPs)类污染物氯化转化行为研究进展[J].环境化学,2012,31(3):278-286.
[7]Gibs J,Stackelberg P E,Furlong E T,et al.Persistence of pharmaceuticals and other organic compounds in chlorinated drinking water as a function of time[J].Sci Total Environ,2007,373(1):240-249.