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首页> 外文期刊>International Journal of Environmental Research and Public Health >Combination of In Situ Feeding Rate Experiments and Chemical Body Burden Analysis to Assess the Influence of Micropollutants in Wastewater on Gammarus pulex
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Combination of In Situ Feeding Rate Experiments and Chemical Body Burden Analysis to Assess the Influence of Micropollutants in Wastewater on Gammarus pulex

机译：结合原位进料速率实验和化学体负荷分析评估废水中微污染物对γ-淀粉样蛋白的影响

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Wastewater discharge is one of the main sources of micropollutants within the aquatic environment. To reduce the risks for the aquatic environment, the reduction of the chemical load of wastewater treatment plant effluent is critical. Based on this need, additional treatment methods, such as ozonation, are currently being tested in several wastewater treatment plants (WWTPs). In the present study, effects were investigated using in situ feeding experiments with Gammarus pulex and body burden analyses of frequently detected micropollutants which used a Quick Easy Cheap Effective Rugged and Safe (QuEChERS) multi-residue method to quantify internal concentrations in collected gammarids. Information obtained from these experiments complemented data from the chemical analysis of water samples and bioassays, which predominantly cover hydrophilic substances. When comparing up- and downstream feeding rates of Gammarus pulex for seven days, relative to the WWTPs, no significant acute effects were detected, although a slight trend of increased feeding rate downstream of the WWTP Aachen-Soers was observed. The chemical load released by the WWTP or at other points, or by diffuse sources, might be too low to lead to clear acute effects on G. pulex . However, some compounds found in wastewater are able to alter the microbial community on its leaves, leading to an increase in the feeding rate of G. pulex . Chemical analysis of internal concentrations of pollutants in the tissues of collected gammarids suggests a potential risk for chronic effects with the chemicals imidacloprid, thiacloprid, carbendazim, and 1H-benzotriazole when exceeding the critical toxic unit value of ?3. This study has demonstrated that a combination of acute testing and measurement of the internal concentration of micropollutants that might lead to chronic effects is an efficient tool for investigating river systems, assuming all relevant factors (e.g., species or season) are taken into account.
机译：废水排放是水生环境中微量污染物的主要来源之一。为了减少对水生环境的风险，降低废水处理厂废水的化学负荷至关重要。基于此需求，目前正在数个废水处理厂（WWTP）中测试其他处理方法，例如臭氧处理。在本研究中，使用与伽玛鲁斯原虫一起就地进食实验和经常检测到的微量污染物的身体负担分析来研究效果，该污染物使用快速简便便宜有效的坚固耐用且安全的（QuEChERS）多残留方法对收集到的伽玛隆中的内部浓度进行定量。从这些实验中获得的信息补充了水样和生物测定的化学分析数据，这些数据主要涵盖亲水性物质。相对于污水处理厂，比较γ短小for虫的7天的上，下游喂食量，虽然观察到污水处理厂亚琛苏尔下游的进食量略有增加的趋势，但未检测到明显的急性影响。污水处理厂或其他地点或扩散源释放的化学负荷可能太低，以至于没有明显的对葛氏芽孢杆菌的急性影响。但是，废水中发现的某些化合物能够改变其叶片上的微生物群落，从而导致葛根牛的摄食率增加。对收集到的γ-内酰胺类化合物中污染物内部浓度的化学分析表明，当超过吡咯啉，噻虫啉，多菌灵和1H-苯并三唑类化学物质的临界毒性单位值超过？3时，有潜在的慢性影响风险。这项研究表明，在考虑所有相关因素（例如物种或季节）的前提下，急性测试和可能导致慢性影响的微量污染物内部浓度测量相结合是研究河流系统的有效工具。

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