School of Resources and Environmental Sciences, East China Normal University, Shanghai 200062, China.
J Hazard Mater. 2011 Jun 15;190(1-3):588-96. doi: 10.1016/j.jhazmat.2011.03.092. Epub 2011 Mar 30.
The occurrence and geochemical behavior of nine pharmaceutical compounds were investigated along the Yangtze River Estuary and its coastal area, by sampling and analysis of pharmaceuticals in sediment, suspended particulate matter (SPM), colloidal and soluble phases. In addition, the impact of sewage input was examined by sampling from sewage treatment plants (STP) effluent and its upstream and downstream in the Yangtze River. Although at relatively low concentrations in SPM and sediments, several pharmaceuticals were found at elevated concentration in filtered water samples from STP-affected sites. STP is therefore an important input of pharmaceuticals in the study area. Colloidal phase was further separated from bulk water samples using cross-flow ultrafiltration (CFUF), confirming it being an effective sorbent for pharmaceuticals with high sorption capacity which are 2-4 orders of magnitude higher than SPM. Moreover, mass balance calculations showed that significant percentages of selected pharmaceutical compounds were associated with aquatic colloids, indicating colloids as a reservoir for these contaminants in the Yangtze estuarine system.
考察了长江口及其沿海地区九种药物化合物的发生和地球化学行为，通过对沉积物、悬浮颗粒物（SPM）、胶体和可溶性相中的药物进行采样和分析。此外，还通过对长江污水处理厂（STP）出水及其上下游进行采样，考察了污水输入的影响。尽管在 SPM 和沉积物中浓度相对较低，但在受 STP 影响的地点的过滤水样中发现了几种浓度较高的药物。因此，STP 是研究区域中药物的重要输入源。使用错流超滤（CFUF）进一步从水体样品中分离胶体相，证实胶体相是一种对具有高吸附能力的药物的有效吸附剂，其吸附能力比 SPM 高 2-4 个数量级。此外，质量平衡计算表明，选定的药物化合物有很大比例与水胶体有关，表明胶体相是这些污染物在长江河口系统中的储存库。
