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Table 1 Reported concentrations of MP in soils by source

From: Review of microplastic sources, transport pathways and correlations with other soil stressors: a journey from agricultural sites into the environment

Class

Author

Quantity*

Size range of analysed particles

Baseline assessment

Choi et al. [26]

664

 

Baseline assessment

Corradini et al. [28]

0–306

 

Baseline assessment

Ding et al. [33]

143–3410

 

Baseline assessment

Feng et al. [41]

43–2

 

Baseline assessment

Harms et al. [56]

0–218

 

Baseline assessment

Huang et al. [64]

0.1–324

 

Baseline assessment

Lv et al. [99]

10

 

Baseline assessment

Piehl et al. [117]

0.34

 

Compost

van Schothorst [141]

888 ± 500

30 µm—2 mm

Compost

Gui et al. [52]

2400 ± 358

50 µm—5 mm

Compost

Braun et al. [21]

7 ± 3

? –5 mm

Compost

Weithmann et al. [169]

96

1–5 mm

Fertilizers

Katsumi et al. [76]

6–369**

 

Greenhouse

Li et al. [93]

1000–3786

 

Pig Manure

Yang et al. [176]

43.8 ± 16.2

 

Sheep faeces

Beriot et al. [14]

997 ± 971

30 µm—2 mm

Plastic mulching

van Schothorst [141]

2242 ± 984

30 µm—2 mm

Plastic mulching

Beriot et al. [14]

2116 ± 1024

30 µm—2 mm

Plastic mulching

Huang et al. [65]

80–308

 

Plastic mulching

Kim et al. [81]

215–3315

 

Plastic mulching

Li et al. [92]

420–1290

 

Plastic mulching

Meng et al. [104]

900–2200

 

Plastic mulching

Yu et al. [180]

310–5698

 

Plastic mulching

Zhou et al. [185]

263–571

 

Sludge

Corradini et al. [29]

1100–3500

 

Sludge

Crossman et al. [31]

541

 

Sludge

van den Berg et al. [12]

5190 ± 2630

 

Sludge

Zhang et al. [181, 183]

87.6–545.9

 

Sludge

Mahon et al. [101]

4200 – 15,000

250–5000 μm

Sludge

Carr et al. [25]

5000

? –5 mm

  1. The table considers research articles found in Scopus database that match “MP AND soils AND agriculture” and deal with microplastic pollution of arable lands. We removed reviews, letters, conferences, and articles related to modelling and toxicology from the final list
  2. *Quantities are expressed in MP particles per kg of dry soil. Ranges show the min and max values reported in the studies. When ranges were not reported, we took the mean value and its standard deviation. Single values without standard deviation (plus/minus sign) show that those studies only reported a single value for a treatment
  3. **Katsumi et al. [76] reported microplastics abundance in mg kg−1