Examining the robustness and concentration dependency of PFAS air-water and NAPL-water interfacial adsorption coefficients.
Examining the robustness and concentration dependency of PFAS air-water and NAPL-water interfacial adsorption coefficients.
复制标题
检查PFAS空气水和NAPL - 水界面吸附系数的鲁棒性和浓度依赖性。
DOI：
10.1016/j.watres.2020.116778
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发表时间：
2021-02-15
期刊：
影响因子：
12.8
通讯作者：
Brusseau ML
中科院分区：
文献类型：
--
作者：
Brusseau ML
确定强大的空气-水或NAPL-水界面吸附系数，KIA值，是关键的表征和建模PFAS的传输和归宿在几个环境系统。直接，高分辨率的测量表面活性剂吸附在流体-流体界面聚集的文献。该数据集被用来检查从传输实验和表面张力数据中确定的三个PFAS的Γ和KIA测量的准确性和适用性。据观察，运输测量的Γ和KIA数据与直接测量的数据完全一致。具体而言，两种方法的Γ值在重叠浓度区域完全一致，跨越约4个数量级。此外，两个数据集符合相同的Γ-C曲线。这些结果最终证明了运输测量值的准确性。通过将吉布斯吸附方程应用于测量的表面张力数据而确定的Γ和KIA值与直接测量的和运输测量的数据集完全一致，证明了其用于代表PFAS在环境系统中的运输的适用性。直接测量的数据用于检查KIA值的浓度依赖性，不存在与使用表面张力或运输测量数据相关的潜在混杂效应。直接测量的数据清楚地表明，KIA在较低浓度下达到恒定的最大限度。对运输测量数据进行的两项单独分析都得出了在较低浓度下KIA值恒定的观测结果，与直接测量数据一致。这些结果进行了讨论的表面活性，相对表面覆盖，和临界浓度。
Determining robust values for the air-water or NAPL-water interfacial adsorption coefficient, KIA, is key to characterizing and modeling PFAS transport and fate in several environmental systems. Direct, high-resolution measurements of surfactant adsorption at the fluid-fluid interface were aggregated from the literature. This data set was used to examine the accuracy and applicability of Γ and KIA measurements determined for three PFAS from transport experiments and surface-tension data. The transport-measured Γ and KIA data were observed to be fully consistent with the directly-measured data. Specifically, Γ values for the two methods were entirely coincident in the region of overlapping concentrations, which spanned ~4 orders-of-magnitude. Furthermore, the two data sets adhered to an identical Γ-C profile. These results conclusively demonstrate the accuracy of the transport-measured values. Γ and KIA values determined from the application of the Gibbs adsorption equation to measured surface-tension data were fully consistent with the directly-measured and transport-measured data sets, demonstrating their applicability for representing PFAS transport in environmental systems. The directly-measured data were used to examine the concentration dependency of KIA values, absent the potential confounding effects associated with the use of surface-tension or transport-measured data. The directly-measured data clearly demonstrate that KIA attains a constant, maximum limit at lower concentrations. Two separate analyses of the transport-measured data both produced observations of constant KIA values at lower concentrations, consistent with the directly-measured data. These outcomes are discussed in terms of surface activities, relative surface coverages, and critical concentrations.
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影响因子：
12.8
作者：
Brusseau, Mark L.;Van Glubt, Sarah
通讯作者：
Van Glubt, Sarah
影响因子：
5.4
作者：
Brusseau, ML;Peng, S;Costanza-Robinson, MS
通讯作者：
Costanza-Robinson, MS
影响因子：
8.8
作者：
Araujo JB;Mainhagu J;Brusseau ML
通讯作者：
Brusseau ML
DOI：
10.1016/j.scitotenv.2020.140017
发表时间：
2020-10-20
期刊：
The Science of the total environment
影响因子：
--
作者：
Brusseau ML;Anderson RH;Guo B
通讯作者：
Guo B
影响因子：
8.9
作者：
Brusseau, Mark L.
通讯作者：
Brusseau, Mark L.