Simulating PFAS adsorption kinetics, adsorption isotherms, and nonideal transport in saturated soil with tempered one-sided stable density (TOSD) based models

JOURNAL OF HAZARDOUS MATERIALS

卷:411

Article

Zhou, Dongbao¹  Brusseau, Mark L.²  Zhang, Yong³  Li, Shiyin⁴  Wei, Wei⁴  Sun, HongGuang¹  Zheng, Chunmiao⁵ 

[1] Hohai Univ, Coll Mech & Mat, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing 210098, Jiangsu, Peoples R China

[2] Univ Arizona, Dept Environm Sci, Tucson, AZ 85721 USA

[3] Univ Alabama, Dept Geol Sci, Tuscaloosa, AL 35487 USA

[4] Nanjing Normal Univ, Sch Environm, Nanjing 210023, Jiangsu, Peoples R China

[5] Southern Univ Sci & Technol, Sch Environm Sci & Engn, State Environm Protect Key Lab Integrated Surface, Shenzhen 518055, Guangdong, Peoples R China

关键词: PFAS;    Adsorption kinetics and isotherm;    Transport;    Tempered one-sided stable density;   

DOI  :  10.1016/j.jhazmat.2021.125169

来源: Elsevier

【 摘 要 】

Reliable quantification of per- and polyfluoroalkyl substances (PFAS) adsorption and mobility in geomedia provides critical information (i.e., evaluation and prediction) for risk characterization and mitigation strategy development. Given the limited PFAS data available and various competing theories for modeling pollutant kinetics, it is indispensable to better understand and quantify the adsorption and transport of PFAS in geomedia using generalized models built upon a consistent physical theory. This study proposed a universal physical law (called the tempered stable law) in PFAS adsorption/transport by interpreting PFAS adsorption kinetics and nonideal transport as a nonequilibrium process dominated by adsorption/desorption with multiple rates following the tempered one-sided stable density (TOSD) distribution. This universal TOSD function led to novel TOSD-based models which were then tested by successfully simulating PFAS adsorption kinetics, adsorption isotherms, and nonideal transport data reported in the literature. Model comparisons and extensions were also discussed to further check the feasibility of the TOSD models and their adaptability to capture PFAS transport in more complex geomedia at all scales.

【 授权许可】

Free