Diffusive gradients in thin films (DGT) is a powerful analytical tool that has been widely used to obtain concentration and distribution data of target analytes in waters, soils, and sediments. While many review papers have discussed the development and application of DGT, there has been no comprehensive review specifically focusing on its use in coastal sediments, which are subject to complex and diverse environmental conditions and can be easily affected by anthropogenic activities. Coastal sediments can act as a source or a sink of trace metals and oxyanions to the overlying water, making it essential to use analytical methods with high resolution and selectivity. This paper provides a thorough review of the research applications of DGT in coastal sediments, including nearshore, estuarine, and intertidal sediments. The review also presents a brief introduction to DGT devices and deployment methods in coastal sediment environments and discusses in details the reported cases of DGT application since 2010, which include metal and oxyanion mobilization and interaction, pollutant monitoring and risk assessment, diagenetic processes, as well as the kinetics and mechanism of analyte transfer across the sediment-water interface. Finally, the review discusses the expected future progress of DGT technique.

薄膜扩散梯度 (DGT) 是一种强大的分析工具，已广泛用于获取水体、土壤和沉积物中目标分析物的浓度和分布数据。虽然许多综述论文讨论了DGT的发展和应用，但还没有专门针对其在沿海沉积物中的应用进行全面的综述，因为沿海沉积物受到复杂多样的环境条件的影响，并且很容易受到人类活动的影响。沿海沉积物可以作为上覆水中痕量金属和氧阴离子的来源或汇，因此必须使用具有高分辨率和选择性的分析方法。本文全面回顾了 DGT 在沿海沉积物（包括近岸、河口和潮间带沉积物）中的研究应用。综述还简要介绍了DGT装置和在沿海沉积物环境中的部署方法，并详细讨论了2010年以来DGT应用的报道案例，包括金属和氧阴离子的动员和相互作用、污染物监测和风险评估、成岩过程等。作为分析物穿过沉积物-水界面转移的动力学和机制。最后，综述讨论了DGT技术未来的预期进展。以及分析物穿过沉积物-水界面转移的动力学和机制。最后，综述讨论了DGT技术未来的预期进展。以及分析物穿过沉积物-水界面转移的动力学和机制。最后，综述讨论了DGT技术未来的预期进展。