温度、相对湿度和土壤有机碳含量对挥发性全氟辛烷磺酸土壤-空气分配系数的影响。

IF 8.2 1区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES
Science of the Total Environment Pub Date : 2024-12-10 Epub Date: 2024-10-18 DOI:10.1016/j.scitotenv.2024.176987
Weiwei Zhang, Limin Ma, Songsong Chen, Chong Chen, Chengcheng Bu, Jinpeng Yu, Ru Zhang, Yongzhi Wang, Haoyu Zeng, Yuchen Han
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引用次数: 0

摘要

土壤-空气分配系数(KSA)值通常用于评估土壤中有机污染物的环境归宿。迄今为止,许多相关化合物(包括一些新出现的污染物,如挥发性全氟辛烷磺酸)的 KSA 值尚未得到充分测量。此外,温度、相对湿度和土壤有机碳含量等环境因素对挥发性 PFAS 的 KSA 值的影响也不明确。本研究使用改良型固相傅立叶变换仪测量了目标挥发性 PFAS 在不同温度(20-40 °C)、相对湿度(30-100 %)和土壤有机碳含量(2.1 %-8.0 %)条件下的 KSA 值。结果表明,土壤中较高的温度、较高的相对湿度和较低的有机碳含量可能会加速目标挥发性全氟辛烷磺酸的扩散。此外,KSA 测量值还被用于推导多元线性回归模型,以描述 logKSA 与温度、相对湿度、土壤有机碳含量和特定 PFAS logKOA 之间的关系。与半经验模型的预测结果相比,我们认为多元线性回归模型比半经验方法更稳健,更容易用于目标挥发性 PFAS 或其他新出现的挥发性 PFAS,以帮助描述目标挥发性 PFAS 污染场地的扩散过程。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effects of temperature, relative humidity and soil organic carbon content on soil-air partitioning coefficients of volatile PFAS.

Soil-air partitioning coefficient (KSA) values are often used to assess the environmental fate of organic contaminants in soil. Till now, sufficient KSA values have not yet been measured for many compounds of interest, including some emerging pollutants such as volatile PFAS. Moreover, the effects of environmental factors such as temperature, relative humidity and soil organic carbon content on KSA of volatile PFAS are also unclear. In this study, the KSA values of target volatile PFAS were measured under various temperature (20-40 °C), relative humidity (30-100 %) and soil organic carbon content (2.1 %-8.0 %) using a modified solid-phase fugacity meter. The results showed that higher temperatures, higher relative humidity and lower organic carbon content in soil may accelerate the diffusion of target volatile PFAS. Furthermore, the KSA measurements were used to derive a multiple linear regression model to depict the relationship between logKSA and temperature, relative humidity, soil organic carbon content and PFAS-specific logKOA. When compared with the predictions obtained from semi-empirical model, we argued that the multiple linear regression model is more robust and easier to implement for target volatile PFAS or other emerging volatile PFAS than the semi-empirical approach to help depict the diffusion process at target volatile PFAS contaminated sites.

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来源期刊
Science of the Total Environment
Science of the Total Environment 环境科学-环境科学
CiteScore
17.60
自引率
10.20%
发文量
8726
审稿时长
2.4 months
期刊介绍: The Science of the Total Environment is an international journal dedicated to scientific research on the environment and its interaction with humanity. It covers a wide range of disciplines and seeks to publish innovative, hypothesis-driven, and impactful research that explores the entire environment, including the atmosphere, lithosphere, hydrosphere, biosphere, and anthroposphere. The journal's updated Aims & Scope emphasizes the importance of interdisciplinary environmental research with broad impact. Priority is given to studies that advance fundamental understanding and explore the interconnectedness of multiple environmental spheres. Field studies are preferred, while laboratory experiments must demonstrate significant methodological advancements or mechanistic insights with direct relevance to the environment.
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