PDF(Pubmed)
Abstract：
This study aimed to investigate the spatial distribution of micropollutants in wastewater related to catchment area, and their environmental risks and fate. About 24-h flow proportional effluent (n = 26) wastewater samples were collected from eight WWTPs across Denmark. From five of these WWTPs corresponding influent samples (n = 20) were collected. Samples were enriched by multi-layer solid phase and analysed by liquid chromatography-high-resolution mass spectrometry and comprehensive two-dimensional gas chromatography with high-resolution mass spectrometry detection. We detected and quantified 79 micropollutants from a list of 291 micropollutants in at least one influent or effluent wastewater sample. From this we found that 54 micropollutants decreased in concentrations during wastewater treatment, while O-desmethylvenlafaxine, carbamazepine, amitriptyline, benzothiazole, terbutryn, and citalopram increased in concentrations through the WWTP.The toxicity of effluent wastewater samples was assessed by EC50 using Raphidocelis subcapitata (R. subcapitata) and LC50 using the crustacean Daphnia magna (D. Magna), for which six micropollutants were detected above the predicted no-effect concentration. Our study demonstrates that catchment area influences the micropollutant composition of wastewater. Out of 19 pharmaceuticals, the measured concentration in influent wastewater was predicted within a factor of 10 from sale numbers and human excretion, which demonstrates the strong influence of catchment area on micropollutant composition.
摘要：
本研究旨在研究与集水区相关的废水中微污染物的空间分布。以及他们的环境风险和命运。从丹麦的八个WWTP中收集了约24小时流量成比例的废水（n=26）。从这些WWTP中的五个收集相应的流入物样品(n=20)。样品通过多层固相富集，并通过液相色谱-高分辨率质谱和具有高分辨率质谱检测的全面二维气相色谱进行分析。我们从至少一个流入或流出废水样品中的291种微污染物列表中检测并量化了79种微污染物。由此，我们发现54种微污染物在废水处理过程中浓度下降，而O-去甲基文拉法辛,卡马西平,阿米替林,苯并噻唑,terbutryn,通过污水处理厂，西酞普兰的浓度增加。使用Raphidocelissubcapitata通过EC50评估了废水样品的毒性（R。头状下)和LC50使用甲壳类大型蚤(D.麦格纳),其中检测到六种微污染物高于预测的无效应浓度。我们的研究表明，集水区影响废水的微污染物组成。在19种药物中，从销售数量和人类排泄物中预测进水废水中测得的浓度在10倍之内，这表明了集水区对微污染物组成的强烈影响。
