Microplastics change soil properties, heavy metal availability and bacterial community in a Pb-Zn-contaminated soil

Feng, Xueying; Wang, Quanlong; Sun, Yuhuan; Zhang, Shuwu; Wang, Fayuan

doi:10.1016/j.jhazmat.2021.127364

Cited by 306 publications

(56 citation statements)

References 94 publications

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“…Liu et al (2017) found that high-concentration PP-MPs (28% w/w) could activate the activities of FDAse and phenoloxidase, while lowconcentration PP-MPs (7% w/w) had no significant effect. High-dose (2% w/w) PLA-MPs, PBS-MPs, and PHB-MPs increased the activities of urease, phosphatase, and catalase; low-dose MPs (0.2% w/w) decreased the activity of phosphatase, but did not change the activities of urease and catalase (Feng et al, 2022). Then, the impacts of MPs also depend on polymer type.…”

Section: Effects Of Microplastic(s) On Soil Enzyme Activitiesmentioning

confidence: 97%

Microplastics as an Emerging Environmental Pollutant in Agricultural Soils: Effects on Ecosystems and Human Health

Zhang

Tan

et al. 2022

Front. Environ. Sci.

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Microplastics are <5 mm in size, made up of diverse chemical components, and come from multiple sources. Due to extensive use and unreasonable disposal of plastics, microplastics have become a global environmental issue and have aroused widespread concern about their potential ecological risks. This review introduces the sources, distribution and migration of microplastics in agricultural soil ecosystems. The effects of microplastics on soil physicochemical properties and nutrient cycling are also discussed. Microplastics can alter a series of key soil biogeochemical processes by changing their characteristics, resulting in multiple effects on the activities and functions of soil microorganisms. The effects of microplastics on soil animals and plants, the combined effects of microplastics and coexisting pollutants (organic pollutants and heavy metals), and their potential risks to human health are also discussed. Finally, prevention and control strategies of microplastic pollution in agricultural soil ecosystems are put forward, and knowledge gaps and future research suggestions about microplastic pollution are given. This review improves the understanding of environmental behavior of microplastics in agricultural soil ecosystems, and provides a theoretical reference for a better assessment of the ecological and environmental risks of microplastics.

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Section: Effects Of Microplastic(s) On Soil Enzyme Activitiesmentioning

confidence: 97%

Microplastics as an Emerging Environmental Pollutant in Agricultural Soils: Effects on Ecosystems and Human Health

Zhang

Tan

et al. 2022

Front. Environ. Sci.

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“…Especially in terrestrial ecosystems, the application of sludge-derived biosolids containing plastic residues, compostable products (degradable food bags or certain materials for medical and personal care containing MPs), and agricultural mulch films lead to great deposition of biodegradable plastic debris and MPs. , Recently, biodegradable plastics that can be mineralized by biotic forces (including microbial degradation and enzymatic degradation) have been booming and considered as alternatives to conventional nonbiodegradable plastics in wide applications . However, recent studies suggested that the incomplete degradation of biodegradable polymers under natural conditions might result in the production of a large amount of biodegradable MPs in a concentrated time period. , Numerous scientific publications have reported that biodegradable MPs could pose risks to the terrestrial eco-environments before complete degradation. ,,− Similar to the nondegradable MPs, the presence of biodegradable MPs in soil could damage the soil structure and increase the formation of water flow channels and evaporation rates, leading to drought and cracking. , In addition, the biodegradable MPs and degradation products could alter the soil pH and the organic carbon or nitrogen cycle, thereby altering plant developments or modifying soil microbiome profiles. ,, However, the impacts caused by biodegradable MPs on terrestrial systems were usually contradictory (positive, negative, or insignificant effects), especially on plant growth and microbial community diversity or richness. − This indicated that the evaluation of biodegradable MPs’ ecological effects should be conducted in certain scenarios and other factors should be taken into consideration.…”

Section: Introductionmentioning

confidence: 99%

“…The contamination of heavy metals in terrestrial systems has been a critical problem threatening food security and human health. Considering the wide co-occurrence of heavy metals and MPs, synergistic effects of MPs coexposed with heavy metals have gained concerns. , As reported, heavy metals could be readily adsorbed or desorbed by MPs that decreased the heavy-metal immobilization in soil, thereby increasing their bioavailability and risks to plants or microbes. , Feng et al reported that PLA MPs significantly increased bioavailable Pb with a 2% concentration but significantly decreased Zn or Pb availability at a 0.2% concentration . In addition, it was suggested that MPs acted as efficient vectors for heavy metals (Cu, Cd, As, Pb, etc.)…”

Section: Introductionmentioning

confidence: 99%

Biodegradable Microplastics Affect the Wheatgrass Traits, Fe Plaque Development Involved in Sb Accumulation, and Microbial Community Functions in Antimony-Contaminated Riparian Wetlands

Cao

Gong

Qin

et al. 2022

ACS Sustainable Chem. Eng.

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Alternative biodegradable plastics have been the primary protocols to alleviate traditional plastic pollution in terrestrial systems. However, few studies have investigated the risks of biodegradable microplastics (MPs) and their combination with antimony (Sb) in wetlands. In this study, polyhydroxyalkanoate (PHA), polylactic acid (PLA), and poly(butyleneadipate-co-terephthalate) (PBAT) MPs (0.5 and 2.5 wt %) and Sb(III)/Sb(V) were individually or jointly exposed to wheatgrass in waterlogged riparian wetland sediments. Results showed that root/shoot lengths and root branches were more sensitive to coexposure of Sb(III) with PLA/PHA MPs. Coexposure of Sb(III) and PLA MPs led to a plummet, but coexposure of Sb(V) with PLA presented a significant promotion on microbial activities. PLA and PHA (2.5 wt %) MPs presented a great impact on Fe plaque development, and their combination with Sb significantly increased Sb accumulation in roots. Meanwhile, PBAT MPs promoted transfer factors and bioaccumulation factors of Sb in wheatgrass shoots under Sb(V) amendment. In addition, except for single Sb(V) exposure, the treatments of MPs with Sb led to a stimulation on carbon utilization by microbes in flooded wetland soil. In summary, this study provided information for evaluating potential threats of biodegradable plastics and MPs if present in high concentrations in Sb-or other heavy-metal-contaminated riparian wetlands.

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“…Heavy metals, the nonbiodegradable inorganic pollutants, have long-term negative impacts on human and ecosystem health. Corresponding studies have highlighted that the simultaneous exposure to MPs and heavy metals in soils joint affects soil properties, microbial diversity and functions (Feng et al 2022 ), root symbiosis, and plant performance (Wang et al 2020a ), and their combined toxicity is tremendously dangerous than individual toxicity (Khalid et al 2021 ; Yan et al 2020 ). Moreover, the weathering of MPs can significantly promote their heavy metal adsorption capacity (Chen et al 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Occurrence, distribution, and characteristics of microplastics in agricultural soil around a solid waste treatment center in southeast China

Liu

Lin

et al. 2022

J Soils Sediments

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Purpose In recent years, microplastic (MP) contamination has raised enormous concern. However, data on the influence of solid waste treatment systems on MP pollution around agricultural soil are lacking. This study investigated the distribution and characteristics of MPs in agricultural soil surrounding a solid waste treatment center in southeastern China. Materials and methods Fifty-seven agricultural topsoil samples around the solid waste treatment center were collected. The samples were pretreated by drying, flotation separation using NaCl solution, and digestion by H 2 O 2 . The abundance and morphological characteristics of MPs were determined by a microscope, followed by Raman spectroscopy analysis identified polymer types and SEM–EDS analysis observed surface morphology and the type of metals accumulated on the MPs. Results and discussion Soil MPs’ abundance ranged from 280 to 2360 items/kg, while a higher abundance of MPs was distributed in the downwind area. The < 1-mm MPs were dominant, and white fragment MPs were widely found. Polyethylene (52.86%) and polypropylene (27.14%) were the most common. Moreover, SEM–EDS images illustrated that MPs were significantly weathered and showed the uneven distribution of metal(loid) elements on the surface, implying that MPs may migrate as heavy metal vectors to threaten agroecosystem safety. Conclusions This study reveals the distribution and characteristics of MPs in agricultural soil surrounding a solid waste treatment center in southeastern China, as well as the potential source of soil MPs, and provides systematic data for further research on MP pollution in agricultural soil. Supplementary Information The online version contains supplementary material available at 10.1007/s11368-022-03341-6.

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Microplastics change soil properties, heavy metal availability and bacterial community in a Pb-Zn-contaminated soil

Cited by 306 publications

References 94 publications

Microplastics as an Emerging Environmental Pollutant in Agricultural Soils: Effects on Ecosystems and Human Health

Microplastics as an Emerging Environmental Pollutant in Agricultural Soils: Effects on Ecosystems and Human Health

Biodegradable Microplastics Affect the Wheatgrass Traits, Fe Plaque Development Involved in Sb Accumulation, and Microbial Community Functions in Antimony-Contaminated Riparian Wetlands

Occurrence, distribution, and characteristics of microplastics in agricultural soil around a solid waste treatment center in southeast China

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