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避免在确定per-和多基基物质吸附剂-吸附水分配时出现人工物

Jarod Snook¹, Jitka Becanova¹, Simon Vojta¹

¹University of Rhode Island Graduate School of Oceanography. Narragansett, RI 02882.

ACS ES&T water

|February 19, 2024

概括

标准化吸附剂亲和度 (Ksw) 的测量对于有效的水生污染物去除至关重要. 这项研究揭示了实验变化如何影响和多基物质 (PFAS) 的Ksw值,为准确的评估提供了指导方针.

科学领域:

环境化学环境化学
分析化学分析化学
材料科学材料科学材料科学

背景情况:

吸附剂亲和度 (Ksw) 对于选择用于捕获水生污染物的材料至关重要.
现有的测量Ksw的方法,特别是PFAS,缺乏标准化,导致结果不一致.
批量实验对于Ksw确定是常见的,但在方法上有很大的不同.

研究的目的:

系统地评估实验设计变化对PFAS的Ksw测量的影响.
制定一个参考程序和一般指导方针,用于在批量实验中准确确定KSW.
为特定的PFAS和吸附剂组合提供可靠的KSw值.

主要方法:

使用各种PFAS (6碳链长度) 和两个吸附剂进行了批量实验.
系统地改变参数,包括溶液:吸收剂比率,甲醇含量和初始PFAS度.
与标准化"最佳设计"程序比较衍生Ksw值.

主要成果:

所有测试的方法变化都显著影响了KSW值,通常抑制了它们.
与最好的设计相比,观察到的日志减少 (Ksw) 从0%到48%不等.
报告了23种不同的PFAS化合物和2种吸附剂的良好约束Ksw值.

结论:

低于最佳的实验设计引入了文物,并降低了PFAS的Ksw测量的准确性.
为PFAS和吸附剂Ksw的确定提出了一种标准化的参考程序.
提供了一般指导方针,以提高各种酸盐-吸附剂系统的批量实验设计的可靠性.

关键词:

在PFAS中,我们可以使用PFAS.吸附剂是一种吸附剂.一个批量实验实验.分布系数的分布系数.

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