Environmental Sciences Europe

Table 1 Co-occurrence keywords in soil microplastics in international journals^a

From: Review and future trends of soil microplastics research: visual analysis based on Citespace

Number	Keyword	Centrality	Word frequency
1	Microplastics	0.3	62
2	Pollution	0.13	36
3	Soil	0.09	26
4	Plastics	0.11	18
5	Exposure	0.07	17
6	Water	0.06	16
7	Sediment	0.02	15
8	Fresh water	0.16	14
9	Ecosystem	0.25	13
10	Organic matter	0.14	12
11	Degradation	0.18	11
12	Litter	0.06	10
13	Environment	0.07	10

^aOnly summarize keywords with a word frequency of not less than 10 times

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