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通过活性炭工艺长期去除 perfluoroalkyl 物质,用于一般高级处理目的

Yoshifumi Nakazawa¹, Koji Kosaka¹, Nobue Yoshida¹

¹Department of Environmental Health, National Institute of Public Health, 2-3-6 Minami, Wako, Saitama 351-0197, Japan.

|September 15, 2023

概括

颗粒状和粉状活性炭努力去除短链PFAS,在更高的温度下观察到溶解. 建议经常更换GAC过器,以有效处理饮用水中的PFAS.

科学领域:

环境科学环境科学
水处理工程水处理工程
分析化学分析化学

背景情况:

颗粒活性炭 (GAC) 和粉状活性炭 (PAC) 广泛用于饮用水处理厂 (DWTP) 清除各种污染物.
和多基物质 (PFAS) 是由于其持久性和潜在的健康影响而引起关注的新兴污染物.

研究的目的:

研究GAC/PAC过程在23个DWTP中去除PFAS的有效性.
了解影响PFAS去除的因素,包括链条长度,水温和活性炭类型.

主要方法:

在GAC/PAC系统的入水和下水中分析PFAS度.
监测过器的突破和脱吸现象.
基于PFAS属性的PAC剂量要求的评估.

主要成果:

对于链较短的 perfluoroalkyl carboxylic 酸 (PFCAs),GAC 的突破速度更快.
短链PFCA (C4,C5) 在高水温 (20-29°C) 发生脱离,超过了影响水平.
长链PFCA在突破之前被GAC有效地去除.
生物活性炭在去除PFAS方面显示无效.
与长链PFCA相比,PAC需要更高的剂量来去除短链PFCA.

结论:

传统的活性炭工艺不足以进行全面的PFAS清除,特别是短链变种.
频繁更换GAC过器 (在两个月内) 对于准短链PFAS至关重要.
提高PAC的吸附性能是改善PFAS处理所必需的.

关键词:

突破性的突破突破性的突破全面的饮用水处理厂.颗粒状活化碳是什么颗粒状活化碳粉末活性炭活性炭的粉末.温度温度是指温度.

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