National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki, 305-8569, Japan.
National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology (NMIJ/AIST), 1-1-1 Umezono, Tsukuba, Ibaraki, 305-8563, Japan.
Chemosphere. 2024 Sep;364:143073. doi: 10.1016/j.chemosphere.2024.143073. Epub 2024 Aug 13.
Generally, activated carbons demonstrated a notable ability to capture long-chain PFAS, but exhibited relatively lower effectiveness for short-chain PFAS. Thirteen commercially available activated carbons in Japan underwent testing for their adsorption capacity of PFAS in water. The activated carbon derived from rice husk, Triporous™-PFAS, exhibited the highest adsorption capacity (over 95%) for PFAS from ultrashort-chain (perfluorocarbon chain: C1 for perfluorocarboxylic acid (PFCA) and C2 for perfluoroalkane sulfonic acid (PFSA)) to long-chain PFAS (C13 for PFCA and C10 for PFSA). An earlier lysimeter study highlighted Andosol, representative soil in Japan, as a potential medium for removing PFAS from irrigation water. Considering cultivating rice on Andosol fields and producing biochar from rice husks and rice straw, a new rice cultivation system is proposed. This system aims to facilitate continuous removal of PFAS from the environment in Asia. Japanese rice cultivation system produces not only rice but also biochar to remove PFAS from water circulation system. The total fluorine content in the tested activated carbon materials ranged from 0.18 to 38 μg g F. Based on the results from background F blank and adsorption capacity, Triporous-PFAS-F was shown to be an option to lower the method detection limit for a proposed international standard method for measuring total PFAS.
一般来说，活性炭对长链 PFAS 表现出显著的捕获能力，但对短链 PFAS 的效果相对较低。日本的 13 种市售活性炭对其在水中吸附 PFAS 的能力进行了测试。从稻壳中提取的 Triporous™-PFAS 对超短链（全氟羧酸 (PFCA) 的 C1 和全氟烷磺酸 (PFSA) 的 C2）到长链 PFAS（PFCA 的 C13 和 PFSA 的 C10）的 PFAS 的吸附能力最高（超过 95%）。早期的渗滤池研究强调了代表日本的安山土作为从灌溉水中去除 PFAS 的潜在介质。考虑到在安山土上种植水稻并从稻壳和稻草中生产生物炭，提出了一种新的水稻种植系统。该系统旨在促进亚洲地区环境中 PFAS 的持续去除。日本的水稻种植系统不仅生产水稻，还生产生物炭，以去除水循环系统中的 PFAS。测试的活性炭材料中的总氟含量范围为 0.18 至 38μg g F。根据背景 F 空白和吸附能力的结果，Triporous-PFAS-F 可作为降低拟议的国际测量总 PFAS 标准方法的检测限的选择。
