Overlooked risk of microplastics from municipal solid waste-storage site  

作　　者：Ying Hu Shuli Guo Dongsheng Shen Jiali Shentu Li Lu Shengqi Qi Min Zhu Yuyang Long 

机构地区：[1]Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling,Zhejiang Engineering Research Center of Non-ferrous Metal Waste Recycling,School of Environmental Science and Engineering,Zhejiang Gongshang University,Hangzhou 310012,China

出　　处：《Frontiers of Environmental Science & Engineering》2024年第10期103-114,共12页环境科学与工程前沿（英文）

基　　金：supported by the National Natural Science Foundation of China(Nos.41977331 and 42177203).

摘　　要：Municipal solid waste(MSW)storage sites are potential and overlooked contributors to microplastic(MP)pollution.Herein,the distribution and dispersion characteristics of MPs at MSW storage sites were investigated through modeling,sampling analysis,and prediction methodologies.The results indicated a notable adsorption phenomenon of MPs on smooth surfaces within such sites,achieving high saturation levels and making MPs prone to re-release by airflow disturbance.Quantitative analysis revealed that the MP concentrations on these surfaces varied from 4.48×10^(5) to 1.90×10^(6) n/m^(2) and that MPs predominantly accumulated in the corner areas.Notably,MP accumulation on wall surfaces can be reduced by 76.4%using washing procedures.The majority of MPs were under 50μm in size and were primarily in fragment form.Operational activities such as ventilation and waste handling were identified to amplify the airborne spread of MPs.The atmospheric concentrations of MPs peaked seasonally,with concentrations of 28.25 n/m^(3) in summer and 3.90 n/m^(3) in winter,and the spatial dispersion ranged from 14.98 to 124.08 km^(2) per station.This study highlights that MSW storage sites are substantial yet overlooked sources of MP pollution,where wall surfaces play a critical role in MP adsorption and dispersal.The implementation of robust management and cleaning protocols is essential to mitigate the environmental footprint of MPs emanating from these locations.This study also provides a typical case for the precise prevention and control of MPs in the environment.

关 键 词：Municipal solid waste storage sites Microplastic Adsorption Dispersion Emerging pollution 

分 类 号：X705[环境科学与工程—环境工程]