Figures (5)  Tables (1)

    • Figure 1. 

      Observed vs predicted content of (a) dissolved organic carbon (DOC), (b) soil organic carbon (SOC), and (c) soil organic matter (SOM) in microplastic polluted soils.

    • Figure 2. 

      Observed vs predicted content of (a) ammonium (NH4), and (b) nitrate (NO3) in microplastic polluted soils.

    • Figure 3. 

      Observed vs predicted content of (a) carbon dioxide (CO2), and (b) nitrous oxide (N2O ) in microplastic polluted soils.

    • Figure 4. 

      Observed vs predicted effects of soil microplastic pollution on plant biomass.

    • Figure 5. 

      Contribution of (a) microplastic (MP) properties (type, shape, and size), MP dose, and incubation period, and soil type to soil carbon (SOC, DOC and SOM), (b) nitrogen (NH4 and NO3), (c) greenhouse gas (CO2 and N2O) emissions, and (d) plant biomass. DOC-dissolved organic carbon. SOC-soil organic carbon. SOM-soil organic matter. NH4-ammonium. NO3- nitrate. CO2-carbon dioxide. N2O-nitrous oxide.

    • MPs properties MPs type PE, HDPE, PS, PLA, LDPE, PU, PVC, PA, PBS, PHB, PTFE, PP, PET, PAN, PBAT, PHE
      MPs size (µm) 1, 3, 5, 6, 13, 18, 25, 30, 35, 55, 57, 60, 66, 67, 100, 103, 125, 150, 180, 188, 190, 250, 500, 625, 630, 900, 1,000, 2,000, 4,280
      MPs shape Particle, fragment, pellet, round, bead, fiber, powder, granule, vessel
      MPs dose (%) 0.001, 0.002, 0.01, 0.02, 0.05, 0.1, 0.2, 0.3, 0.25, 0.4, 0.5, 1, 1.5, 2, 2.5, 3, 5, 7, 10, 10.5, 13, 28
      Soil related Soil type Clay loam, clay, sandy loam, loamy, sandy, sandy clay loam, silt loam, silty, loam, clay loam, silty clay loam
      Experiment duration Incubation (days) 7, 10, 12, 14, 15, 19, 21, 20, 22, 25, 28, 30, 31, 35, 40, 42, 45, 46, 50, 54, 55, 60, 70, 80, 90, 100, 105, 110, 120, 144, 164, 365
      PE-polyethylene. HDPE-High-density polyethylene. PS-polystyrene. PLA-polylactic acid. LDPE-low-density polyethylene. PU-polyurethane. PVC-polyvinyl chloride. PA-polyamide. PBS-polybutylene succinate. PES-Polyester. PET-polyethylene terephthalate. PP- polypropylene. PHB-Polyhydroxybutyrate. PTFE-Polytetrafluoroethylene. PAN- Polyacrylonitrile. PBAT- Polybutylene adipate terephthalate.

      Table 1. 

      Details of variables used for model development.