A Review on Adsorption and Transport of Microplastics in Soil and the Effect of Ageing on Environmental Behavior of Pollutants

HU Tingting; CHEN Jiawei

doi:10.15898/j.cnki.11-2131/td.202202180024

2022 Vol. 41, No. 3

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Article navigation > Rock and Mineral Analysis > 2022 > 41(3): 353-363

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HU Tingting, CHEN Jiawei. A Review on Adsorption and Transport of Microplastics in Soil and the Effect of Ageing on Environmental Behavior of Pollutants[J]. Rock and Mineral Analysis, 2022, 41(3): 353-363. doi: 10.15898/j.cnki.11-2131/td.202202180024

Citation:

HU Tingting, CHEN Jiawei. A Review on Adsorption and Transport of Microplastics in Soil and the Effect of Ageing on Environmental Behavior of Pollutants[J]. Rock and Mineral Analysis, 2022, 41(3): 353-363. doi: 10.15898/j.cnki.11-2131/td.202202180024

A Review on Adsorption and Transport of Microplastics in Soil and the Effect of Ageing on Environmental Behavior of Pollutants

HU Tingting,
CHEN Jiawei^,

School of Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing 100083, China

More Information

Corresponding author: CHEN Jiawei, chenjiawei@cugb.edu.cn

Received Date: 18 February 2022

Revised Date: 28 March 2022

Accepted Date: 30 April 2022

Publish Date: 28 May 2022

Abstract

Abstract

BACKGROUND
Microplastics, defined as the plastic material with a size of < 5mm, have been widely attracting attention due to the high mobility and strong affinity toward pollutants. Microplastics concentrate in soil through plastic film breakage, landfill and atmospheric deposition. Microplastics can migrate downward in soil, and adsorb co-existing pollutants. The ageing of microplastics due to surface geochemical processes, would result in a great threat to the environment.
OBJECTIVES
To comprehensively understand the environmental behavior of microplastics and their potential environmental risks.
METHODS
The key factors controlling vertical transport of microplastics in soil were summarized, including microplastics properties such as the size, shape and functional groups, and soil properties such as the porosity, organic matter and soil minerals. The adsorption of organic pollutants and heavy metals on microplastics and the effect of ageing were analyzed.
RESULTS
The results obtained from recent studies showed that: (1) The transportation of microplastics can be affected by their inherent properties and the soil environments. (2) Microplastics can adsorb heavy metals and organic pollutants, and co-transport in soil, which would change the environmental fate and bioavailability of pollutants. (3) The ageing process can impact the microplastics mobility, adsorption capacity, and the release of the associated contaminants derived from the microplastics. The release of endogenous organics phthalate esters from aged microplastics could reach 50.3-6660ng/g, and that of heavy metal Pb²⁺ reach 5.1-81.4μg/g.
CONCLUSIONS
In view of the current research and existing problems, this review gives guidance on microplastics transport, adsorption and ageing effect for future studies. (1) The interaction mechanisms between microplastics and pollutants should be elucidated under multi-factor coupling conditions in soil, especially for the influence of different soil types and environmental factors on the adsorption/desorption/migration of pollutants on the microplastics. (2) The effects of different ageing processes on the properties and environmental behavior of the microplastics should be studied by experimental simulation. (3) In order to uncover the effects of aging on the release behavior of endogenous pollutants, the study on the release of endogenous pollutants from microplastics in different ageing environment should be strengthened.
- microplastics /
- soil /
- transport /
- adsorption /
- pollutants /
- ageing

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