Extracellular polymeric substances (EPS) have a great impact on the characteristics of sediment particles and their environmental effects in hydro-environmental systems, yet little effort has been made to study the considerable variability in the element adsorption process of sediment particles caused by EPS. Understanding the variability of the adsorption characteristics of sediment particles associated with EPS and quantifying the scale of the adsorption isotherm parameters are important for understanding how EPS mediate sediment properties and environmental factors. In this paper, isothermal equilibrium adsorption experiments are done on phosphorus to study the influence of EPS on the adsorption characteristics of sediment particles, and the Langmuir adsorption isotherm is applied to analyze the adsorption rule of sediment particles under the impact of EPS. The current research demonstrates that significant differences will take place in the adsorption characteristics of sediments coated with EPS at different development phases and the phosphorus adsorption capacity of sediment particles increases with the growth of EPS. The difference in the adsorption percentage between sediment particles coated with EPS of 0 and 6 weeks growth time is about 42%–60% for different initial aqueous phosphorus concentration. A formula describing the adsorption isotherm parameter of the maximum material (element) adsorption capacity of sediment particles change over time is further proposed based on the experimental data. The current study provides some evidence for the interaction of sediment particles, EPS, and adsorbed elements in the water environment.

胞外聚合物（EPS）对沉积物颗粒的特性及其在水环境系统中的环境影响有很大影响，但很少有人致力于研究 EPS 引起的沉积物颗粒元素吸附过程的相当大的可变性。了解与 EPS 相关的沉积物颗粒吸附特性的可变性和量化吸附等温线参数的规模对于了解 EPS 如何调节沉积物特性和环境因素非常重要。本文对磷进行等温平衡吸附实验，研究EPS对沉积物颗粒吸附特性的影响，应用Langmuir吸附等温线分析EPS作用下沉积物颗粒的吸附规律。目前的研究表明，EPS包覆沉积物在不同发育阶段的吸附特性会发生显着差异，沉积物颗粒对磷的吸附能力随着EPS的增长而增加。对于不同的初始含水磷浓度，0 周和 6 周生长时间的 EPS 涂层沉积物颗粒之间的吸附百分比差异约为 42%–60%。根据实验数据进一步提出了描述沉积物颗粒最大物质（元素）吸附容量随时间变化的吸附等温线参数的公式。