Temporal variability of combined sewer overflow contaminants: Evaluation of wastewater micropollutants as tracers of fecal contamination
Temporal variability of combined sewer overflow contaminants: Evaluation of wastewater micropollutants as tracers of fecal contamination
复制标题
DOI：
10.1016/j.watres.2013.04.030
复制
发表时间：
2013-09-01
期刊：
影响因子：
12.8
通讯作者：
Prevost, Michele
中科院分区：
文献类型：
--
作者：
Madoux-Humery, Anne-Sophie;Dorner, Sarah;Prevost, Michele
对两个具有不同土地用途（主要是住宅与机构）的排污口（OA 和 OB）启动了为期一年的监测计划。监测了由秋季和夏季降水以及冬末和早春融雪和降水混合引起的 11 次 CSO 事件。在 CSO 中测得的中位浓度为 1.5 x 10(6) 大肠杆菌/100 mL、总悬浮固体 (TSS) 136.0 mg/L、咖啡因 (CAF) 4599.0 ng/L、卡马西平 (CBZ) 158.9 ng/L（排放口 OA 和 5.1 x 10(4) E）。大肠杆菌/100 mL，167.0 mg TSS/L，300.8 ng CAF/L，4.1 ng CBZ/L，排放口 OB。 CSO 中的浓度动态主要与雨水稀释和溢流开始的时间有关。由于污染物浓度高、事件持续时间长，而且在此期间缺乏对溢流的限制，融雪被认为是保护饮用水源的关键时期。测量参数之间的相关性反映了污染物的来源和运输途径，其中大肠杆菌与 CBZ 相关。 TSS 与大肠杆菌无关，因为发现大肠杆菌主要与原污水有关，而 TSS 还与下水道内沉积物和地表径流的再悬浮有关。在接收水域中，与 WWMP 相比，大肠杆菌仍然是强烈稀释的水样中粪便污染的最佳指标，因为 WWMP 可以稀释至低于其检测限。 (C) 2013 Elsevier Ltd. 保留所有权利。
A monitoring program was initiated for two sewage outfalls (OA and OB) with different land uses (mainly residential versus institutional) over the course of a year. Eleven CSO events resulting from fall and summer precipitations and a mixture of snowmelt and precipitation in late winter and early spring were monitored. Median concentrations measured in CSOs were 1.5 x 10(6) Escherichia coli/100 mL, 136.0 mg/L of Total Suspended Solids (TSS), 4599.0 ng/L of caffeine (CAF), 158.9 ng/L of carbamazepine (CBZ), in outfall OA and 5.1 x 10(4) E. coli/100 mL, 167.0 mg TSS/L, 300.8 ng CAF/L, 4.1 ng CBZ/L, in outfall OB. Concentration dynamics in CSOs were mostly related to the dilution by stormwater and the time of day of the onset of overflows. Snowmelt was identified as a critical period with regards to the protection of drinking water sources given the high contaminant concentrations and long duration of events in addition to a lack of restrictions on overflows during this period. Correlations among measured parameters reflected the origins and transport pathways of the contaminants, with E. coli being correlated with CBZ. TSS were not correlated with E. coli because E. coli was found to be mostly associated with raw sewage whereas TSS were additionally from the resuspension of in-sewer deposits and surface runoff. In receiving waters, E. coli remained the best indicator of fecal contamination in strongly diluted water samples as compared to WWMPs because WWMPs can be diluted to below their detection limits. (C) 2013 Elsevier Ltd. All rights reserved.