Osaka Prefectural Institute of Public Health, 1-3-69 Nakamichi, Higashinari-ku, Osaka 537-0025, Japan.
Water Res. 2011 Jul;45(13):3925-32. doi: 10.1016/j.watres.2011.04.052. Epub 2011 May 13.
Perfluorooctanesulfonate (PFOS) and perfluorooctanoate (PFOA) have been recognized as global environmental pollutants. Although PFOS and PFOA have been detected in tap water from Japan and several other countries, very few studies have examined the fate, especially removal, of perfluorinated compounds (PFCs) in drinking water treatment processes. In this study, we analyzed PFOS and PFOA at every stages of drinking water treatment processes in several water purification plants that employ advanced water treatment technologies. PFOS and PFOA concentrations did not vary considerably in raw water, sand filtered water, settled water, and ozonated water. Sand filtration and ozonation did not have an effect on the removal of PFOS and PFOA in drinking water. PFOS and PFOA were removed effectively by activated carbon that had been used for less than one year. However, activated carbon that had been used for a longer period of time (>1 year) was not effective in removing PFOS and PFOA from water. Variations in the removal ratios of PFOS and PFOA by activated carbon were found between summer and winter months.
全氟辛烷磺酸（PFOS）和全氟辛酸（PFOA）已被确认为全球性的环境污染物。尽管在来自日本和其他几个国家的自来水中已经检测到 PFOS 和 PFOA，但很少有研究考察过饮用水处理过程中全氟化合物（PFCs）的命运，特别是去除情况。在这项研究中，我们分析了采用先进水处理技术的几家净水厂的饮用水处理过程的各个阶段中 PFOS 和 PFOA 的情况。在原水、砂滤水、沉淀水和臭氧化水中，PFOS 和 PFOA 的浓度没有明显变化。砂滤和臭氧化对饮用水中 PFOS 和 PFOA 的去除没有影响。PFOS 和 PFOA 可被使用时间不到一年的活性炭有效去除。然而，使用时间较长（>1 年）的活性炭对去除水中的 PFOS 和 PFOA 没有效果。活性炭去除 PFOS 和 PFOA 的去除率在夏季和冬季之间存在差异。
