目前奈米材料已被廣泛的添加於民生用品與工業產品之中，隨著奈米科技應用的發展，造成有大量的奈米物質可能於使用後被排放至廢水處理廠中進而進入到環境之中，急需了解奈米汙染物於環境中的濃度以進行奈米顆粒的環境風險評估。本研究中以50奈米金顆粒作為標準品測試單顆粒式感應耦合電漿質譜儀對奈米顆粒濃度的適用範圍，得知在濃度1,000到100,000顆/毫升可以測得準確的顆粒數；並以單顆粒式感應耦合電漿質譜儀調查了10種工業中較常使用的奈米顆粒如Ce、Cu、Sn、In、W、Zr、Al、Zn、Ti和Ag於台灣中部與南部四個不同工業廢水處理程序的廢水處理廠中的去除及趨勢，發現在不同工業排放的廢水中，所含的奈米顆粒比例有所不同，但是反映出工業本身所使用的材料。在廢水中，含量最多的元素為Al，進流水中含量皆大於109顆/毫升，而含量最少的元素為In，在部分的廢水中是低於偵測極限的。另外於不同工業廢水處理廠中可發現，若設有不同處理單元，則奈米顆粒去除率有差異。

Nanomaterials have been incorporated into a wide range of consumer and industrial products. With nanotechnology-based applications increasing rapidly, a large amount of nanomaterials is being discharged into the waste treatment systems before releasing into the receiving waters. To enable the environmental risk assessment of nanoscale pollutants, the information regarding the concentrations of nanoparticles across environmental compartments is urgently needed. In this work, first, we tested single-particle inductively coupled plasma-mass spectrometry (spICP-MS) detected limit with 50 nm Au nanoparticle, knowing that nanoparticle concentration have good recvoery in 1,000 – 100,000 #NP/mL. Second, we aimed to characterize 10 common nanoparticles (NPs) relevant to consumer usages including Ce, Cu, Sn,In,W, Zr Al, Zn, Ti, and Ag in industrial sewages and to compare their removal across the treatment processes of four industrial wastewater treatment plants (WWTPs) using distinct processes in southern and middle Taiwan using spICP-MS. The concentrations of the selected NPs measured in raw sewages have different nanoparticle proportion reflecting usage of industrial. In all sewages, Al as the most abundance with more than 109 #NP/mL in all influent wastewater and In as the least abundance with no nanoparticle in some influent wastewater. We found that different treatment units cause different removal.

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