Water matrix effect on UV photodegradation of perfluorooctanoic acid.
Water matrix effect on UV photodegradation of perfluorooctanoic acid.
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DOI：
10.2166/wst.2011.825
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发表时间：
2011-11
期刊：
影响因子：
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通讯作者：
R. R. Giri-R.;Hiroaki Ozaki;T. Okada;S. Takikita;S. Taniguchi;R. Takanami
中科院分区：
文献类型：
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作者：
R. R. Giri-R.;Hiroaki Ozaki;T. Okada;S. Takikita;S. Taniguchi;R. Takanami
过去几年来，在水环境中广泛检测到全氟化合物一直是一个令人关切的问题，而废水处理设施的流出物是这些化合物的主要来源。即使是先进的氧化技术（AOTs）也不能用于矿化，因为它们的稳定性非常高。光化学技术特别是真空紫外（VUV）已被发现在这方面是非常有前途的。但在基于uv的aot中，VUV的应用仍未取得太大进展。此外，水质对pfc光矿化的影响尚不清楚。本研究旨在评估全氟辛酸（PFOA）在超纯水（UPW）、自来水（TW）、地表水和处理后的废水中的光电矿化电位，并在实验室批量实验中采用可最大限度利用低压灯VUV辐射的反应器设置。Neya River water （NRW）和Nakahama Wastewater Treatment Plant出水（NWWTPE）分别代表地表水和处理后的废水出水。此外，还在50%稀释的NRW和NWWTPE中进行了试验。从PFOA的去除、除氟和总有机碳（TOC）去除等方面对PFOA光矿化进行了讨论。强调了该方法在富有机废水中PFOA矿化的实用性，以及进一步研究的需要。
The widespread detection of perfluorinated compounds (PFCs) in the water environment has been a concern for the last several years, while effluents from wastewater treatment facilities are the major sources of these compounds. Even advanced oxidation technologies (AOTs) are not useful for mineralization of the compounds due to their very high stability. Photochemical techniques using particularly vacuum UV (VUV) have been found to be very promising in this regard. But the use of VUV in UV-based AOTs has still not progressed much. Moreover, the impact of water quality on PFCs photomineralization is unknown. This investigation aimed to assess photomineralization potentials of perfluorooctanoic acid (PFOA) in ultrapure water (UPW), tap water (TW), surface water and treated wastewater effluent using a reactor setup enabling maximum utilization of VUV emission of low pressure lamp in laboratory batch experiments. Neya River water (NRW) and the Nakahama Wastewater Treatment Plant Effluent (NWWTPE) represented surface water and treated wastewater effluent respectively. Also, tests were carried out in 50% diluted NRW and NWWTPE. PFOA photomineralization in terms of PFOA removal, defluorination and total organic carbon (TOC) removal are discussed. The usefulness of the method for PFOA mineralization in organic-rich wastewaters, and further research needs are also highlighted.