Particles under stress: ultrasonication causes size and recovery rate artifacts with soil-derived POM but not with microplastics
نویسندگان
چکیده
Abstract. The breakdown of soil aggregates and the extraction particulate organic matter (POM) by ultrasonication density fractionation is a method widely used in (SOM) analyses. It has recently also been for microplastic from samples. However, investigation POM physiochemical properties ecological functions might be biased if particles are comminuted during treatment. In this work, different types POM, which representative terrestrial ecosystems anthropogenic influences, were tested their structural stability face range 0 to 500 J mL−1. occluded (oPOM) an agricultural forest as well pyrochar showed significant reduction particle size at ≥50 mL−1 average factor 1.37±0.16 concurrent recovery rates 21.7±10.7 % when being extracted. Our results imply that increasing causes retention within sedimenting phase, leading misinterpretation certain fractions more strongly bound oPOM or part mineral-associated (MOM). This could, example, lead false estimation physical stabilization. contrast, neither fresh nor weathered polyethylene (PE), terephthalate (PET) polybutylene adipate (PBAT) microplastics rate after application ultrasound. We conclude applied soils no impact on distribution thus provides valuable tool assessment aggregates.
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ژورنال
عنوان ژورنال: Biogeosciences
سال: 2021
ISSN: ['1726-4189', '1726-4170']
DOI: https://doi.org/10.5194/bg-18-159-2021