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61,005 resultsShowing papers similar to Risk assessment and zoning of soil microplastics in a typical megacity, China
ClearDistribution, Environmental Risk Assessment, and Key Drivers of Microplastics in Farmland Soils Across Agricultural Zones in China
Researchers mapped the distribution and environmental risk of microplastics across a study area while identifying the key drivers of spatial variation, including land use and proximity to pollution sources. The findings provide a framework for prioritizing cleanup and management efforts in microplastic-contaminated environments.
Effects of soil properties and land use patterns on the distribution of microplastics: A case study in southwest China
Researchers surveyed microplastic contamination in soils across different land use types in Guizhou Province, southwest China. The study found that soil properties and land use patterns significantly influence microplastic abundance and distribution, with agricultural and urban soils generally showing higher contamination levels than less intensively managed areas.
Spatial Distributions, Compositional Profiles, Potential Sources, and Intfluencing Factors of Microplastics in Soils from Different Agricultural Farmlands in China: A National Perspective
Researchers conducted a nationwide survey of microplastics in Chinese agricultural soils, collecting 477 samples from 109 cities across 31 regions, and identified spatial distribution patterns and key factors influencing farmland microplastic contamination.
Different functional areas and human activities significantly affect the occurrence and characteristics of microplastics in soils of the Xi'an metropolitan area
Researchers investigated microplastic pollution in soils across different functional areas of the Xi'an metropolitan area in China. The study found an average of 2,218 microplastic particles per kilogram of soil in Xi'an city, with industrial and tourist areas showing the worst contamination, likely linked to higher levels of urbanization and human activity.
Spatiotemporal occurrence and characteristics of microplastics in the urban road dust in a megacity, eastern China
Researchers collected road dust samples from different areas of Nanjing, a major city in eastern China, and found an average of 143 microplastic particles per square meter. Commercial and heavy industrial zones had the highest contamination levels, with 29 different polymer types identified across the city. The study found that urban land use, recent rainfall, and particulate matter levels were the main factors influencing microplastic pollution patterns in road dust.
Microplastics in urban soils of Nanjing in eastern China: Occurrence, relationships, and sources
Researchers surveyed microplastics in urban green space soils across Nanjing, China, finding an average abundance of 461 particles per kilogram with fibers and fragments as the dominant forms. Source analysis linked microplastic patterns to nearby delivery and recycling activity points, suggesting that urban logistics infrastructure is an underrecognized microplastic source.
Spatial–Temporal and Risk Assessment of Microplastics in the Surface Water of the Qinhuai River during Different Rainfall Seasons in Nanjing City, China
Researchers conducted a spatial-temporal analysis of microplastic contamination and risk in a river system across multiple seasons and sites, finding that concentrations varied significantly with location and time of year. Urban and industrial zones showed the highest microplastic loads and associated ecological risk.
Distribution of microplastics in the soils of a petrochemical industrial region in China: Ecological and Human Health Risks
Researchers surveyed microplastic contamination in soils across a major petrochemical industrial region in China and found concentrations ranging from 714 to over 11,000 particles per kilogram. Educational land had the highest contamination levels, and ecological risk assessments showed nearly all land-use types were at the highest risk level. The study also found that infants face significantly higher daily microplastic exposure than adults, underscoring the need for targeted pollution management in industrial urban areas.
Trends in the occurrence and accumulation of microplastics in urban soil of Nanjing and their policy implications
Researchers tracked microplastic accumulation in the urban soils of Nanjing, China over 15 years and found that concentrations increased by nearly 50%, from about 327 to 481 particles per kilogram. Industrial areas and regions near transportation infrastructure showed the highest contamination levels. The study also evaluated the effectiveness of plastic reduction policies and found that while some interventions slowed the accumulation rate, overall pollution continued to rise.
Microplastics in Urban Soils From Different Land Use Activities of Cyberjaya (Malaysia): Exploring Occurrence, Relationships, Sources and Pollution Level
Researchers surveyed urban soils across five different land uses in Cyberjaya, Malaysia, and found microplastics in all of them, with construction areas showing the highest concentrations. The types of plastic particles varied by location, suggesting that the sources and characteristics of soil microplastic contamination depend on what activities take place in that area.
Occurrence characteristics and potential risk of microplastics under different land conditions
Researchers surveyed microplastic pollution across different land types in northern China, including farmland, industrial areas, and restored land. Farmland soil had the highest microplastic concentrations, about twice that of industrial park soil, and over half of sampling sites showed moderate pollution levels. The study also found that longer periods of land restoration were associated with lower microplastic abundance.
Characteristics of Soil Heavy Metal Pollution and Health Risks in Chenzhou City
Researchers analyzed 600 soil samples in Chenzhou City, China, and found that while most areas had low to moderate heavy metal contamination, about 3% of samples showed high ecological risk from metals like mercury and cadmium near industrial zones. While focused on heavy metals rather than microplastics, the study is relevant because microplastics in soil can absorb and transport these same toxic metals, potentially increasing human exposure through crops grown in contaminated areas.
Spatial distribution of microplastics in soil with context to human activities: a case study from the urban center
Researchers mapped the spatial distribution of microplastics in topsoil across different land use types in an urbanized city in the upper Indus plain. They found that agricultural and urban areas had significantly higher microplastic concentrations than less developed areas, with fibers being the dominant particle type. The study links microplastic soil contamination patterns to specific human activities including irrigation with wastewater, plastic mulching, and industrial discharge.
Examining Soil Microplastics: Prevalence and Consequences Across Varied Land Use Contexts
Scientists examined microplastic contamination in soil samples from different land use areas in Makassar City, Indonesia. They found microplastics present across all sites, with the types and concentrations varying based on how the land was used, whether for agriculture, residential, or commercial purposes. The study suggests that human activity patterns strongly influence the amount and kind of microplastic pollution found in urban and agricultural soils.
Considering microplastic characteristics in ecological risk assessment: A case study for China
Scientists measured microplastic contamination in agricultural soils in Northeast China and found concentrations ranging from 300 to 12,800 particles per kilogram. Most particles came from textiles and packaging, with rayon and PET fibers being the most common types. Risk assessment models showed varying levels of ecological concern, and the study emphasizes that multiple characteristics of microplastics, not just their quantity, need to be considered when evaluating environmental risk.
Risks of microplastics in different land-use types of soil in a typical petrochemical city in China
Researchers surveyed microplastic contamination across different land-use types in Daqing, a major petroleum city in China, finding concentrations ranging from about 714 to over 11,000 particles per kilogram of soil. Industrial land posed the highest ecological risk, and infants were found to have significantly higher daily microplastic exposure than adults. The dominant plastics were rayon, polypropylene, and polyethylene, primarily in fiber form smaller than 1 mm.
From mapping to modelling: the evolving multidimensional microplastic risks in China's farmlands
Researchers combined a national-scale soil survey with machine learning models to map and project microplastic risks across China's farmlands through 2050, finding that agricultural film use, population density, and GDP are key drivers, and that regional risk rankings will shift counter-intuitively depending on which socioeconomic development pathway is followed.
Nationwide meta-analysis of microplastic distribution and risk assessment in China's aquatic ecosystems, soils, and sediments
A nationwide meta-analysis of 7,766 sampling sites across China found that microplastic distribution is influenced by economic development, population density, and geography, with generally higher concentrations in prosperous areas. The pollution varies significantly across water, soil, and sediment compartments, highlighting the need for AI-based regulatory frameworks to manage standardized risk assessment.
The distribution of microplastics in soil aggregate fractions in southwestern China
Researchers investigated microplastic distribution across different soil types in agricultural and forested areas near a lake in southwestern China and found plastic particles in every sample, with concentrations as high as 42,960 particles per kilogram. Approximately 95% of the particles fell within the microplastic size range, and fibers were the dominant form, likely originating from textiles and agricultural materials. The study demonstrates that microplastic contamination in soils is extensive and varies with land use practices.
Microplastic diversity, risks and soil impacts: A multi-metric assessment across land-use systems
Researchers surveyed microplastic abundance, polymer diversity, and ecological risk across seven land-use types in India's Brahmaputra Valley, finding that built-up areas had the highest particle counts while forest soils paradoxically showed the greatest polymer hazard scores due to high-risk polymers, and that land-use type shapes both the quantity and composition of soil microplastic contamination.
Spatial Risks of Microplastics in Soils and the Cascading Effects Thereof
Using data from over 3,000 field sites across China, researchers found that about 4.3% of soil ecosystems face ecological risk from microplastics, with agricultural soils being the most vulnerable at nearly 15%. Climate factors like temperature and precipitation, combined with human activities like plastic film use in farming, are the main drivers of risk. The study highlights that microplastic contamination in farm soil is a widespread problem that could affect the safety of crops grown for human consumption.
Status, characteristics, and ecological risks of microplastics in farmland surface soils cultivated with different crops across mainland China
Researchers conducted a nationwide survey of microplastics in farmland soils across mainland China, covering over 30 crop types in 109 cities. They found microplastics in all sampled soils, with concentrations varying by crop type, region, and farming practices such as plastic film mulching and irrigation methods. The study provides the most comprehensive picture to date of agricultural microplastic contamination in China and identifies the key farming practices that contribute most to soil pollution.
Characterization of Microplastics and Associated Heavy Metals in Urban Soils Affected by Anthropogenic Littering: Distribution, Spatial Variation, and Influence of Soil Properties
Researchers sampled soils across residential, commercial, and industrial land-use types in urban areas and found microplastics in every location, with polypropylene, polyethylene, and polyamide as the dominant polymer types, at concentrations up to 850,000 particles per kilogram. Heavy metals were also associated with the plastic particles, meaning microplastics in urban soil may serve as combined carriers of chemical toxicants. The findings highlight urban soil as a major but underappreciated reservoir of microplastic pollution.
The spatial distribution of microplastics in topsoils of an urban environment - Coimbra city case-study
Researchers mapped microplastic contamination across urban soils in Coimbra, Portugal, comparing samples from parks, roadsides, and other land uses. They found microplastics in all soil samples, with higher concentrations in areas with more human activity and artificial surfaces. The study demonstrates that urban soils are significant reservoirs of microplastic pollution and that land use patterns strongly influence contamination levels.