Worsfold Water Quality Centre, Trent University, Peterborough, Ontario, Canada.
Environ Toxicol Chem. 2010 Nov;29(11):2461-9. doi: 10.1002/etc.305.
The uptake of polar organic contaminants into polar organic chemical integrative samplers (POCIS) varies with environmental factors, such as water flow rate. To evaluate the influence of water flow rate on the uptake of contaminants into POCIS, flow-controlled field experiments were conducted with POCIS deployed in channel systems through which treated sewage effluent flowed at rates between 2.6 and 37 cm/s. Both pharmaceutical POCIS and pesticide POCIS were exposed to effluent for 21 d and evaluated for uptake of pharmaceuticals and personal care products (PPCPs) and endocrine disrupting substances (EDS). The pesticide POCIS had higher uptake rates for PPCPs and EDS than the pharmaceutical POCIS, but there are some practical advantages to using pharmaceutical POCIS. The uptake of contaminants into POCIS increased with flow rate, but these effects were relatively small (i.e., less than twofold) for most of the test compounds. There was no relationship observed between the hydrophobicity (log octanol/water partition coefficient, log K(OW)) of model compounds and the effects of flow rate on the uptake kinetics by POCIS. These data indicate that water flow rate has a relatively minor influence on the accumulation of PPCPs and EDS into POCIS.
极性有机污染物在极性有机化学整合采样器（POCIS）中的吸收会受到环境因素的影响，如水流量。为了评估水流量对 POCIS 中污染物吸收的影响，在处理后的污水以 2.6 至 37 cm/s 的流速流经的渠道系统中进行了流量控制的现场实验。POCIS 分别暴露于污水中 21 天，用于评估药物 POCIS 和农药 POCIS 对药物和个人护理产品（PPCPs）以及内分泌干扰物质（EDS）的吸收。农药 POCIS 对 PPCPs 和 EDS 的吸收速率高于药物 POCIS，但使用药物 POCIS 具有一些实际优势。污染物在 POCIS 中的吸收随流速增加而增加，但对于大多数测试化合物，这些影响相对较小（即不到两倍）。未观察到模型化合物的疏水性（辛醇/水分配系数的对数，log K(OW)）与 POCIS 对流速对吸收动力学的影响之间存在关系。这些数据表明，水流量对 POCIS 中 PPCPs 和 EDS 的积累的影响相对较小。
