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Effects of the Oversized Microplastic Pollution Layer on Soil Aggregates and Organic Carbon at Different Soil Depths by Shuo Liu; Shi-Hua Niu; Lei Xiang; Xin-Di Liao; Si-Cheng Xing is a Environmental Science article available to read on EtoBox.

What is Effects of the Oversized Microplastic Pollution Layer on Soil Aggregates and Organic Carbon at Different Soil Depths about?

Soil aggregates (SAs) are the main site for soil organic carbon (SOC) fixation, and land plastic pollution is increasingly causing many soil problems. The effects of plastic on SAs and SOC seem to be significant, but there is still a lack of relevant research. This study investigated the effects of the “plastic contamination layer” (PCL) formed by the microplastic precursors (namely, oversized microplastics (OMPs)) on the content and properties of SAs of different particle sizes at different soil depths. The results showed that the PCL had an effect on SAs of different sizes at different depths: Compared with the control group, PCL mainly increased the content of SAs in 0–5 cm soil depth, about 28.08 mg macroaggregates, 13.79 mg microaggregates and 59.82 mg silt and clay aggregates per gram of soil. The presence of the PCL mainly down-regulates the organic carbon (OC) content in 0–5 cm macroaggregates, which is about 9.59 g/kg, the OC content in 10–20 cm microaggregates, which is about 16.41 g/kg, and the OC content in 0–5 cm silt and clay aggregates, which is about 4.16 g /kg, downregulated the expression of the key carbon metabolism genes (CMGs) coxL, and inhibited the contributi

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Author

Shuo Liu; Shi-Hua Niu; Lei Xiang; Xin-Di Liao; Si-Cheng Xing

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Environmental Science (Physical Sciences)