微塑料
生物塑料
聚对苯二甲酸乙二醇酯
聚酯纤维
土壤有机质
聚乙烯
化学工程
化学
有机质
环境化学
解吸
材料科学
土壤水分
有机化学
吸附
复合材料
土壤科学
环境科学
废物管理
工程类
作者
Jakub Fojt,Pavla Denková,Martin Brtnický,Jiří Holátko,Veronika Řezáčová,Václav Pecina,Jiří Kučerík
标识
DOI:10.1021/acs.est.2c01970
摘要
Adverse effects of microplastics on soil abiotic properties have been attributed to changes in the soil structure. Notably, however, the effects on the supramolecular structure of soil organic matter (SOM) have been overlooked, despite their key role in most soil properties. This work accordingly investigated the influence of plastic residues at various concentrations on the SOM supramolecular structure and soil water properties. To model plastic residues of micro-bioplastics, spherical or spherical-like poly-3-hydroxybutyrate (PHB) was used, while polyethylene terephthalate (PET) was used as a model of conventional microplastics. The results suggest that both types of plastic residues affect SOM properties, including physical stability (represented by water molecule bridges), water binding (represented by decreased desorption enthalpy or faster desorption), and the stability of SOM aliphatic crystallites. The results further showed that the polyester-based microplastics and micro-bioplastics affected the SOM abiotic characteristics and that therefore the observed effects cannot be attributed solely to changes in the whole soil structure. Notably, similar adverse effects on SOM were observed for both tested plastic residues, although the effect of PHB was less pronounced compared to that of PET.
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