Mixing effect of polylactic acid microplastic and straw residue on soil property and ecological function

Chen, Huiping; Wang, YuHuang; Sun, Xi; Peng, Yuke; Xiao, Lin

doi:10.1016/j.chemosphere.2019.125271

Cited by 269 publications

(62 citation statements)

References 50 publications

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“…Considering the accumulation of microplastics in soil in the future (Chen et al 2020), 7 microplastic treatments (0, 0.1, 0.5, 1, 3, 6, and 18% microplastic addition, w/w) with 4 replicates were set up. According to Fuller and Gautam (2016), a microplastic addition of <1% was regarded as a low concentration, and an addition >1% was regarded as a high concentration.…”

Section: Methodsmentioning

confidence: 99%

Microplastic Addition Alters the Microbial Community Structure and Stimulates Soil Carbon Dioxide Emissions in Vegetable‐Growing Soil

Gao

Yao

et al. 2020

Enviro Toxic and Chemistry

242

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Microplastic pollution has become an increasingly pervasive issue worldwide, but little is known about its effects on the soil environment. A soil microcosm experiment was conducted using low‐density polyethylene microplastics to estimate the effect of microplastic pollution on soil nutrient cycling and the soil microbial community structure. The results showed that microplastic addition significantly promoted soil carbon dioxide emissions but not soil nitrous oxide emissions. Soil pH, dissolved organic carbon, ammonia nitrogen, the contents of total phospholipid fatty acid (PLFA), and the ratios of gram‐positive bacteria to gram‐negative bacteria and saturated to monounsaturated PLFAs significantly increased. In addition, nitrate nitrogen and the ratios of fungi to bacteria, total iso‐branched fatty acids to total anteiso‐branched fatty acids, and cyclopropyl to precursor significantly decreased with increasing microplastic addition. The addition of microplastics decreased the abundance of ammonia oxidizing bacteria and nitrite reductase (nirS) but had little effect on the functional genes of ammonia oxidizing archaea, nitrite reductase (nirK), and nitrous oxide reductase. A principal coordinate analysis of the bacterial 16S ribosomal RNA gene and fungal internal transcribed spacer in the microplastic addition treatments revealed that the bacterial and fungal communities formed an obvious cluster. The average abundance of some microbial species with tolerance and degradability to microplastics, such as Nocardioidaceae, Amycolatopsis, Aeromicrobium, Cytophagaceae, Betaproteobacteria, Rhodoplanes, and Mortierella, in the microplastic addition treatments was significantly higher than that of the control treatment. The results suggested that microplastics have obvious influences on microbial communities and may affect global carbon and nitrogen cycles. Environ Toxicol Chem 2021;40:352–365. © 2020 SETAC

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Section: Methodsmentioning

confidence: 99%

Microplastic Addition Alters the Microbial Community Structure and Stimulates Soil Carbon Dioxide Emissions in Vegetable‐Growing Soil

Gao

Yao

et al. 2020

Enviro Toxic and Chemistry

242

View full text Add to dashboard Cite

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“…Once they have arrived in agroecosystems, there are a range of plausible pathways (including plowing) that lead to a transport of such particles into the soil [22], where effects upon soil properties, processes and biodiversity can then unfold. Previous studies on the effects of microplastics have shown effects on soil organisms, especially microorganisms, and chemical conversion processes in soils [23][24][25]. Initial evidence also pointed to soil physical properties being altered by microplastics [26].…”

Section: Introductionmentioning

confidence: 99%

Microplastic fibers affect dynamics and intensity of CO2 and N2O fluxes from soil differently

et al. 2021

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Microplastics may affect soil ecosystem functioning in critical ways, with previously documented effects including changes in soil structure and water dynamics; this suggests that microbial populations and the processes they mediate could also be affected. Given the importance for global carbon and nitrogen cycle and greenhouse warming potential, we here experimentally examined potential effects of plastic microfiber additions on CO2 and N2O greenhouse gas fluxes. We carried out a fully factorial laboratory experiment with the factors presence of microplastic fibers (0.4% w/w) and addition of urea fertilizer (100 mg N kg− 1) using one target soil. The conditions in an intensively N-fertilized arable soil were simulated by adding biogas digestate at the beginning of the incubation to all samples. We continuously monitored CO2 and N2O emissions from soil before and after urea application using a custom-built flow-through steady-state system, and we assessed soil properties, including soil structure. Microplastics affected soil properties, notably increasing soil aggregate water-stability and pneumatic conductivity, and caused changes in the dynamics and overall level of emission of both gases, but in opposite directions: overall fluxes of CO2 were increased by microplastic presence, whereas N2O emission were decreased, a pattern that was intensified following urea addition. This divergent response is explained by effects of microplastic on soil structure, with the increased air permeability likely improving O2 supply: this will have stimulated CO2 production, since mineralization benefits from better aeration. Increased O2 would at the same time have inhibited denitrification, a process contributing to N2O emissions, thus likely explaining the decrease in the latter. Our results clearly suggest that microplastic consequences for greenhouse gas emissions should become an integral part of future impact assessments, and that to understand such responses, soil structure should be assessed.

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“…A recent study showed that the co-existence of PE-MPs and BC could increase the sorption of ion (Li et al, 2021). A previous study showed that the soil DOC with rice straw and PLA-MPs was significantly lower than that in soil with rice straw alone when rice straw was used as the carbon source (Chen et al, 2020). Our result showed that the co-existence of BC and plastic fragments could significantly decrease the soil DOC compared with the soil with BC alone, which was similar to the previous results.…”

Section: Effects Of Different Treatments On Dissolved Organic Matter and Relative Functional Group Characteristics In Soilmentioning

confidence: 99%

“…DN had no significant influence on characteristic functional groups. DBC could change the components of DOC and significantly raise the contents of amines and aromatic substances as compared with CKBC, which might be because the degradable MPs could change the components of DOC (Chen et al, 2020).…”

Section: Effects Of Different Treatments On Dissolved Organic Matter and Relative Functional Group Characteristics In Soilmentioning

confidence: 99%

Combined Effects of Microplastics and Biochar on the Removal of Polycyclic Aromatic Hydrocarbons and Phthalate Esters and Its Potential Microbial Ecological Mechanism

et al. 2021

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Microplastics (MPs) have been attracting wide attention. Biochar (BC) application could improve the soil quality in the contaminated soil. Currently, most studies focused on the effect of MPs or BC on the soil properties and microbial community, while they neglected the combined effects. This study investigated the combined effects of BC or ball-milled BC (BM) and polyethylene plastic fragments (PEPFs) and degradable plastic fragments (DPFs) on the removal of polycyclic aromatic hydrocarbons (PAHs) and phthalate esters (PAEs) from the PAH-contaminated soil and the potential microbial ecological mechanisms. The results showed that BC or BM combined with PEPF could accelerate the removal of PAHs and PAEs. PEPF combined with BM had the most significant effect on the removal of PAHs. Our results indicating two potential possible reasons contribute to increasing the removal of organic pollutants: (1) the high sorption rate on the PEPF and BC and (2) the increased PAH-degrader or PAE-degrader abundance for the removal of organic pollutants.

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Mixing effect of polylactic acid microplastic and straw residue on soil property and ecological function

Cited by 269 publications

References 50 publications

Microplastic Addition Alters the Microbial Community Structure and Stimulates Soil Carbon Dioxide Emissions in Vegetable‐Growing Soil

Microplastic Addition Alters the Microbial Community Structure and Stimulates Soil Carbon Dioxide Emissions in Vegetable‐Growing Soil

Microplastic fibers affect dynamics and intensity of CO2 and N2O fluxes from soil differently

Combined Effects of Microplastics and Biochar on the Removal of Polycyclic Aromatic Hydrocarbons and Phthalate Esters and Its Potential Microbial Ecological Mechanism

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