Higher concentrations of microplastics in runoff from biosolid-amended croplands than manure-amended croplands
Higher concentrations of microplastics in runoff from biosolid-amended croplands than manure-amended croplands
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DOI：
10.1038/s43247-023-00691-y
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发表时间：
2023-02-20
影响因子：
7.9
通讯作者：
Bartelt-Hunt, Shannon
中科院分区：
文献类型：
--
作者：
Beni, Nasrin Naderi;Karimifard, Shahab;Bartelt-Hunt, Shannon
由城市污水处理污泥产生的土地应用城市生物固体会导致农业生态系统中的微塑料污染。生物固体对农业土壤中微塑料浓度的影响以前已经研究过，但是，以前尚未量化微塑料从生物固体改良农田中迁移的潜力。在这项研究中，粪肥和生物固体被施加到田间小区，径流收集自然降水事件和细菌生物膜生长在不同的微塑料形态的潜力进行了调查。与粪肥改良和对照地块相比，在土地施用生物固体的地块径流中检测到更高浓度的微塑料。纤维和碎片是最常检测到的塑料形态在径流中，与它们的表面粗糙度降低。量化了生物固体对美国地表沃茨微塑料污染的潜在影响，这是第一个量化农业生产区附近地表沃茨非点源微塑料污染的潜在影响。将源自城市污水处理污泥的生物固体应用于美国内布拉斯加州的农田，提高了径流水中的微塑料浓度，并可能导致地表沃茨的微塑料污染，这表明2020年夏季的一项实地研究。
Land-applied municipal biosolids, produced from municipal wastewater treatment sludge, contributes to microplastics contamination in agroecosystems. The impacts of biosolids on microplastic concentrations in agricultural soil have been previously investigated, however, the potential for microplastics transport from biosolid-amended croplands has not been previously quantified. In this study, manure and biosolids were applied to field plots, runoff was collected following natural precipitation events and the potential of bacterial biofilm to grow on different microplastic morphologies was investigated. Higher concentrations of microplastics were detected in runoff from plots with land-applied biosolid in comparison with manure-amended and control plots. Fibers and fragments were the most frequently detected plastic morphologies in runoff, correlated with their decreased surface roughness. The potential of biosolids to contribute to microplastic contamination to U.S. surface waters was quantified which is among the first to quantify the potential for nonpoint source microplastic contamination of surface waters adjacent to agricultural production areas.Application of biosolids derived from municipal wastewater treatment sludge to agricultural croplands in Nebraska, US elevated microplastic concentrations in runoff water, and could contribute to microplastic contamination of surface waters, suggests a field study in summer 2020.