泥沙研究2023，Vol.48Issue(6)：9-15,7.DOI:10.16239/j.cnki.0468-155x.2023.06.002
悬浮泥沙环境下微塑料颗粒的絮凝特征研究
Study on flocculation characteristics of microplastic particles with biofilm in suspended sediment environment
摘要
Abstract
Study on the flocculation characteristics of microplastic particle and suspended sediment,especially in the case of biofilm attachment in the natural water environment,is of scientific significance for the sedimentation kinetic processes of microplastic particle and suspended sediment in turbulent water body.Kaolin was selected as the representative of suspended sediment for flocculation experiments with polyethylene microplastic particles colonized by biofilm in a mixing tank with controlled turbulent shear rate,and a non-invasive floc observation system was used to directly observe the variation of flocs.The flocculation characteristics of flocs under different suspended sediment concentrations and different turbulent shear rates were analyzed and checked by the Winterwerp model after fitting the experiment data.The result shows that the characteristic particle size of flocs generally increases first and then decreases with the increasing of turbulent shear rate and suspended sediment concentration,and which is confirmed by the numerical simulation results.关键词
微塑料/悬浮泥沙/絮凝/生物膜/紊动Key words
microplastics/suspended sediment/flocculation/biofilm/turbulence分类
建筑与水利引用本文复制引用
诸裕良,王靖圆,徐长健,沈骁腾..悬浮泥沙环境下微塑料颗粒的絮凝特征研究[J].泥沙研究,2023,48(6):9-15,7.基金项目
国家自然科学基金长江水科学研究联合基金项目(U204023) （U204023）
国家重点研发青年科学家项目(2022YFC3105900) （2022YFC3105900）
国家自然科学基金面上项目(42176165) （42176165）
国家自然科学基金国际(地区)合作与交流项目(42211530484) （地区）
