太阳能光热汽泡去除水中微塑料研究

Removal of Microplastics from Water Using Solar Thermal Bubbles

提出了一种利用光热汽泡涡流调控去除微塑料的新方法。通过利用热汽泡周围的Marangoni流效应,塑料颗粒可以循环流入汽泡中,并在汽泡内“熔炉”中聚集和融合成大块塑料,从而可持续地收集水中的塑料颗粒。研究表明,等离激元纳米结构阵列具有优异的吸光集热特性,阵列单元形态的变化会影响光热性能;而水体中光热汽泡所引起的涡流显著影响了微塑料的富集。此外,汽泡的直径、颗粒浓度和粒径也会影响热汽泡对颗粒的富集效率。研究丰富了光热汽泡多相流理论,并为水中微塑料去除研究提供了新的思路。

A new method using solar thermal bubble vortex modulation for the removal of microplastics has been proposed. By exploiting the Marangoni flow effect around the hot bubbles, plastic particles can circulate into the bubbles and aggregate/fuse into larger plastic masses within the “melting pot” of the bubbles, allowing for sustainable collection of plastic particles from water. The study indicates that plasmonic nanostructure arrays exhibit excellent light absorption and heat collection characteristics, and the morphological changes of the array units can affect the photothermal performance. The vortices induced by the solar thermal bubbles in the water significantly impact the enrichment of microplastics. Additionally, the diameter of the bubbles, particle concentration, and particle size also affect the enrichment efficiency of the hot bubbles on the particles. This research enriches the theory of photothermal bubble multiphase flow and provides new insights into the research on the removal of microplastics from water.