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Comment on “Spatial distribution of microplastic concentration around landfill sites and its potential risk on groundwater”
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This commentary critiques methodological weaknesses in a study of microplastic contamination around landfills, particularly the absence of field blanks and unclear sampling protocols. Rigorous quality assurance is essential for producing reliable microplastic contamination data, especially in environmental monitoring near waste sites.
This paper discusses some critical weak points and mistakes identified in the original paper. The authors disregarded the importance of field blanks, sampling equipment, and well specifications for proper quality assurance and control. Beneficial field practices guarantee highly reliable results of laboratory analysis for microplastics. In addition, polymer type (chemical composition) and shape (form) are different classification criteria, but the authors mixed these in their description. The distribution and transport of microplastics should be properly understood, along with a knowledge of groundwater flow conditions, such as flow direction and velocity, in the study area.
More Papers Like This
Good field practice and hydrogeological knowledge are essential to determine reliable concentrations of microplastics in groundwater
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This commentary identifies methodological weaknesses in a published study on microplastic contamination from an informal landfill, arguing that inadequate descriptions of sampling wells, missing groundwater level and flow direction data, and incomplete sampling procedures make the reported microplastic concentrations in groundwater unreliable.
Errors and recommended practices that should be identified to reduce suspected concentrations of microplastics in soil and groundwater: A review
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This review analyzed over 185 studies on microplastics in soil and groundwater, identifying widespread methodological errors in sample quantity, quality assurance, identification, and classification, and providing recommendations to improve the reliability of future research in these environments.
Microplastics in a UK Landfill: Developing Methods and Assessing Concentrations in Leachate, Hydrogeology, and Release to the Environment
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Researchers found microplastics in leachate from a UK landfill and in groundwater near landfill sites, demonstrating that inadequate plastic waste management allows microplastics to enter water systems. This study developed and validated field and laboratory methods for detecting microplastics in these undersampled environments.
Comment on the paper ‘Soil microplastic pollution under different land uses in tropics, southwestern China’
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This commentary examines methodological weaknesses in a published study on soil microplastic pollution in tropical China, identifying failures to report sampling equipment, use field blanks, correctly name soil layers, and apply mandatory normality tests before ANOVA analysis. The authors argue these combined errors undermine the reliability of the original findings and highlight the need for standardized protocols in the still-developing field of soil microplastics research.
Comment on the paper “Microplastic contamination of an unconfined groundwater aquifer in Victoria, Australia”
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This comment examines methodological problems in a groundwater microplastic study, highlighting that plastic sampling equipment (polyamide ropes, polycarbonate filters) risks contamination, insufficient sample volumes compromise reliability, and Pearson correlation was inappropriately applied without normality testing.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.