Vernadsky Institute of Geochemistry and Analytical Chemistry, 119991 Moscow, Russia.
Institute of Inorganic Chemistry, University of Vienna, 1090 Vienna, Austria.
Molecules. 2023 Jan 19;28(3):994. doi: 10.3390/molecules28030994.
A growing global emission of engineered nanoparticles (ENPs) into the aquatic environment has become an emerging safety concern that requires methods capable of identifying the occurrence and possibly determining the amounts of ENPs. In this study, we employed sector-field inductively coupled mass spectrometry to assess the presence of ENPs in coastal seawater samples collected from the Black Sea in regions suffering different anthropogenic impacts. Ultrafiltration through commercial 3 kDa membrane filters was shown to be feasible to separate the ENPs from the bulk seawater, and the subsequent ultrasound-mediated acidic dissolution makes the metals constituting the ENPs amenable to analysis. This procedure allowed the ENPs bearing Cu, Zn, V, Mo, and Sn to be for the first time quantitated in seashore surface water, their concentration ranging from 0.1 to 1.0 μg L (as metal) and related to the presence of industry and/or urban stress. While these levels are decreased by natural dilution and possible sedimentation, the monitored ENPs remain measurable at a distance of 2 km from the coast. This can be attributed not only to local emission sources but also to some natural backgrounds.
越来越多的工程纳米粒子（ENPs）被排放到水生环境中，这引发了人们对环境安全的担忧，因此需要能够识别 ENPs 存在并可能确定其含量的方法。在本研究中，我们采用扇形场电感耦合质谱法来评估从黑海受不同人为影响的地区采集的沿海海水中 ENPs 的存在情况。研究表明，通过商业 3 kDa 膜过滤器进行超滤可以将 ENPs 从海水中分离出来，随后的超声介导酸溶解使构成 ENPs 的金属易于分析。该程序首次允许定量分析海表水中携带 Cu、Zn、V、Mo 和 Sn 的 ENPs，其浓度范围为 0.1 至 1.0 μg L（以金属计），并与工业和/或城市压力有关。虽然这些水平因自然稀释和可能的沉降而降低，但在距海岸 2 公里的地方仍可测量到监测到的 ENPs。这不仅归因于当地的排放源，也归因于一些自然背景。
