污水硫稳定同位素监测方案 - 不同用水行为下的污水采样与分析

2.2 监测方案

为了监测不同用水行为产生的污水，本实验分别于不同监测点位监测各用水行为下产生的污水。污水采集工作均通过自动取样器于各用水行为对应的优势时段内采集瞬时水样予以完成，自来水样品从自来水龙头处放水并利用取样桶足量采集。采样工作共计3日，采集样品共计48个，监测指标为δ34S。

同时，为进一步研究硫稳定同位素在排水片区末端的变化规律及对应的不确定度差异，针对研究区域内的排水片区末端污水中的δ34S进行了连续72 h的逐时监测。监测点位位于研究范围内排水片区末端处（M点位），此处点位的样品采集工作同步于上述在不同用水行为下污水样品的采集，以确保上述不同用水行为下产生的污水在汇集后经由M点位被提取并流向下游。实验监测点位分布如图2所示。实验监测方案详见表2和表3。

2.2 Monitoring plan

In order to monitor the sewage generated by different water use behaviors, this experiment collected sewage at different monitoring points for each water use behavior. The sewage collection work was completed by an automatic sampler during the advantageous time period corresponding to each water use behavior, and tap water samples were collected by letting the water flow from the tap and using a sampling bucket to collect a sufficient amount. The sampling work lasted for 3 days, and a total of 48 samples were collected. The monitoring index was δ34S.

At the same time, in order to further study the variation of sulfur stable isotopes at the end of the drainage area and the corresponding uncertainty differences, continuous hourly monitoring of δ34S in the sewage at the end of the drainage area in the study area was carried out for 72 hours. The monitoring point was located at the end of the drainage area in the study area (point M), and the sample collection work at this point was carried out simultaneously with the collection of sewage samples under different water use behaviors to ensure that the sewage generated under different water use behaviors was extracted and flowed downstream through point M after being collected. The distribution of experimental monitoring points is shown in Figure 2. The experimental monitoring plan is detailed in Tables 2 and 3.