絮凝是控制水环境中悬浮颗粒物(SPM)的命运和运输的关键过程,在水科学领域受到了相当多的关注(例如,海洋学,Limnology,和水文学),仍然是一个活跃的研究领域。已进行了絮凝研究,以阐明SPM动力学并诊断各种环境问题。絮凝,沉降,SPM的运移与絮凝物的组成和结构性质密切相关。事实上,絮凝物的组成是高度不均匀的。然而,缺乏对絮体组成和结构的全面研究导致了对SPM的时空动力学的误解。这篇综述总结了目前对絮凝物非均相组成的理解(例如,矿物,有机物,金属,微塑料,工程纳米颗粒)及其对其结构以及在水生环境中的命运和运输的影响。此外,人类活动的影响(例如,污染物排放,构造)对絮凝物组成进行了讨论。
Flocculation is a key process for controlling the fate and transport of suspended particulate matter (SPM) in water environments and has received considerable attention in the field of water science (e.g., oceanography, limnology, and hydrology), remaining an active area of research. The research on flocculation has been conducted to elucidate the SPM dynamics and to diagnose various environmental issues. The flocculation, sedimentation, and transportation of SPM are closely linked to the compositional and structural properties of flocs. In fact, flocs are highly heterogeneous in terms of composition. However, the lack of comprehensive research on floc composition and structure has led to misconceptions regarding the temporal and spatial dynamics of SPM. This
review summarizes the current understanding of the heterogeneous composition of flocs (e.g., minerals, organic matter, metals, microplastic, engineered nanoparticles) and its effect on their structure and on their fate and transport within aquatic environments. Furthermore, the effects of human activities (e.g., pollutant discharge, construction) on floc composition are discussed.