微塑料在近岸河砂中扩散能力的影响因素研究  

Influencing factors of diffusion ability of micro-plastics in nearshore river sand

作　　者：俸荣伟 罗永路 吴甲森 黄有仙 关威 麦黄睿 FENG Rongwei;LUO Yonglu;WU Jiasen;HUANG Youxian;GUAN Wei;MAI Huangrui(Guangxi Zehai Environmental Protection&Water Co.,Ltd.,Hechi 547000,China;Guangxi Smart Water Engineering Research Center,Nanning 530000,China;Nanning Engineering Research Center of Urban and Rural Water&Wastewater,Nanning 530000,China)

机构地区：[1]广西泽海环保水务有限公司,广西河池547000 [2]广西壮族自治区智慧水务工程研究中心,广西南宁530000 [3]南宁市城乡供水排水工程研究中心,广西南宁530000

出　　处：《化工环保》2024年第6期881-886,共6页Environmental Protection of Chemical Industry

摘　　要：针对微塑料(MPs)污染在自然环境中难以防治的问题,通过多孔介质(玻璃微珠、石英砂和河砂)填充柱扩散实验,考察了MPs(聚乙烯粉)在模拟自然近岸河砂环境中扩散能力的影响因素,探究了MPs在该环境中的扩散规律。结果表明:MPs在多孔介质中的扩散能力受多孔介质表面粗糙度、多孔介质粒径、背景溶液离子强度以及自身浓度和粒径的影响显著;多孔介质表面粗糙度、背景溶液离子强度和MPs粒径越大,MPs在多孔介质中的扩散能力越弱;环境中MPs浓度和多孔介质粒径越大,MPs在多孔介质中的扩散能力越强。此外,作为污水处理中的MPs过滤材料,河砂较石英砂更具应用潜力。It is difficult to control micro-plastics(MPs)pollution in the natural environment.To address this problem,the factors affecting the diffusion ability of MPs(polyethylene powder)in the simulated natural nearshore river sand were investigated through the diffusion experiment of the filled column of porous media(glass beads,quartz sand,and river sand).The diffusion law of MPs in this environment was explored.The result shows that the diffusion ability of MPs in porous media is significantly affected by the surface roughness and the particle size of porous media,the ionic strength of the background solution,and its own concentration and particle size.As the surface roughness of porous media,ionic strength of the background solution,and particle size of MPs increase,the diffusion ability of MPs in porous media decreases.As the concentration of MPs and the particle size of porous media rise,the diffusion ability of MPs in porous media enhances.In addition,compared with quartz sand,river sand has more potential as a filter material for MPs in wastewater treatment.

关 键 词：微塑料 河砂 扩散能力 影响因素 

分 类 号：X506[环境科学与工程—环境工程]