Principles, applications, and limitations of diffusive gradients in thin films induced fluxed in soils and sediments

被引：6
作者：
Liu H. [1 ,2 ]
Chi L. [1 ,2 ]
Shen J. [1 ,2 ]
Arandiyan H. [3 ,4 ]
Wang Y. [5 ]
Wang X. [1 ,2 ,6 ]
机构：
[1] School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai
[2] National Observation and Research Station of Erhai Lake Ecosystem in Yunnan, Dali
[3] Laboratory of Advanced Catalysis for Sustainability, School of Chemistry, University of Sydney, Sydney, 2006, NSW
[4] Centre for Advanced Materials and Industrial Chemistry (CAMIC), School of Science, RMIT University, Melbourne, 3000, VIC
[5] Department of Chemical Engineering, The University of Melbourne, Parkville, 3010, VIC
[6] Yunnan Dali Research Institute of Shanghai Jiao Tong University, Dali
来源：
Chemosphere | 2024年 / 350卷
基金：
中国国家自然科学基金;
关键词：
Bioavailability; Diffusive gradients in thin films; DIFS model; Labile speciation; Soil and sediment;
D O I：
10.1016/j.chemosphere.2023.141061
中图分类号：
学科分类号：
摘要：
The diffusive gradients in thin films (DGT) technique serves as a passive sampling method, inducing analyte transport and concentration. Its application is widespread in assessing labile components of metals, organic matter, and nutrients across various environmental media such as water, sediments, and saturated soils. The DGT devices effectively reduce the porewater concentration through irreversible binding of solutes, consequently promoting the release of labile species from the soil/sediment solid phase. However, the precise quantification of simultaneous adsorption and desorption of labile species using DGT devices alone remains a challenge. To address this challenge, the DGT-Induced Fluxes in Soils and Sediments (DIFS) model was developed. This model simulates analyte kinetics in solid phases, solutions, and binding resins by incorporating factors such as soil properties, resupply parameters, and kinetic principles. While the DIFS model has been iteratively improved to increase its accuracy in portraying kinetic behavior in soil/sediment, researchers’ incomplete comprehension of it still results in unrealistic fitting outcomes and an oversight of the profound implications posed by kinetic parameters during implementation. This review provides a comprehensive overview of the optimization and utilization of DIFS models, encompassing fundamental concepts behind DGT devices and DIFS models, the kinetic interpretation of DIFS parameters, and instances where the model has been applied to study soils and sediments. It also highlights preexisting limitations of the DIFS model and offers suggestions for more precise modeling in real-world environments. © 2024 Elsevier Ltd
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