Response of soil dissolved organic matter to microplastic addition in Chinese loess soil

Hongfei Liu, Xiaomei Yang, Guobin Liu, Chutao Liang, Sha Xue*, Hao Chen, Coen J. Ritsema, Violette Geissen

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

41 Citations (Scopus)

Abstract

Plastic debris is accumulating in agricultural land due to the increased use of plastic mulches, which is causing serious environmental problems, especially for biochemical and physical properties of the soil. Dissolved organic matter (DOM) plays a central role in driving soil biogeochemistry, but little information is available on the effects of plastic residues, especially microplastic, on soil DOM. We conducted a soil-incubation experiment in a climate-controlled chamber with three levels of microplastic added to loess soil collected from the Loess Plateau in China: 0% (control, CK), 7% (M1) and 28% (M2) (w/w). We analysed the soil contents of dissolved organic carbon (DOC), dissolved organic nitrogen (DON), NH4 +, NO3 −, dissolved organic phosphorus (DOP), and PO4 3− and the activities of fluorescein diacetate hydrolase (FDAse) and phenol oxidase. The higher level of microplastic addition significantly increased the nutrient contents of the DOM solution. The lower level of addition had no significant effect on the DOM solution during the first seven days, but the rate of DOM decomposition decreased in M1 between days 7 and 30, which increased the nutrient contents. The microplastic facilitated the accumulation of high-molecular-weight humic-like material between days 7 and 30. The DOM solutions were mainly comprised of high-molecular-weight humic-like material in CK and M1 and of high-molecular-weight humic-like material and tyrosine-like material in M2. The Microplastic stimulated the activities of both enzymes. Microplastic addition thus stimulated enzymatic activity, activated pools of organic C, N, and P, and was beneficial for the accumulation of dissolved organic C, N and P.
Original languageEnglish
Pages (from-to)907-917
JournalChemosphere
Volume185
DOIs
Publication statusPublished - 2017

Fingerprint

dissolved organic matter
Biological materials
loess
Soil
Soils
Plastics
soil
Molecular Weight
plastic
Molecular weight
Nutrients
Biogeochemistry
dissolved organic phosphorus
Hydrolases
Food
dissolved organic nitrogen
Monophenol Monooxygenase
biogeochemistry
Organic carbon
Climate

Keywords

  • Dissolved organic carbon (DOC)
  • Dissolved organic nitrogen (DON)
  • Dissolved organic phosphorus (DOP)
  • Excitation-emission matrix (EEM)
  • Microplastic

Cite this

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title = "Response of soil dissolved organic matter to microplastic addition in Chinese loess soil",
abstract = "Plastic debris is accumulating in agricultural land due to the increased use of plastic mulches, which is causing serious environmental problems, especially for biochemical and physical properties of the soil. Dissolved organic matter (DOM) plays a central role in driving soil biogeochemistry, but little information is available on the effects of plastic residues, especially microplastic, on soil DOM. We conducted a soil-incubation experiment in a climate-controlled chamber with three levels of microplastic added to loess soil collected from the Loess Plateau in China: 0{\%} (control, CK), 7{\%} (M1) and 28{\%} (M2) (w/w). We analysed the soil contents of dissolved organic carbon (DOC), dissolved organic nitrogen (DON), NH4 +, NO3 −, dissolved organic phosphorus (DOP), and PO4 3− and the activities of fluorescein diacetate hydrolase (FDAse) and phenol oxidase. The higher level of microplastic addition significantly increased the nutrient contents of the DOM solution. The lower level of addition had no significant effect on the DOM solution during the first seven days, but the rate of DOM decomposition decreased in M1 between days 7 and 30, which increased the nutrient contents. The microplastic facilitated the accumulation of high-molecular-weight humic-like material between days 7 and 30. The DOM solutions were mainly comprised of high-molecular-weight humic-like material in CK and M1 and of high-molecular-weight humic-like material and tyrosine-like material in M2. The Microplastic stimulated the activities of both enzymes. Microplastic addition thus stimulated enzymatic activity, activated pools of organic C, N, and P, and was beneficial for the accumulation of dissolved organic C, N and P.",
keywords = "Dissolved organic carbon (DOC), Dissolved organic nitrogen (DON), Dissolved organic phosphorus (DOP), Excitation-emission matrix (EEM), Microplastic",
author = "Hongfei Liu and Xiaomei Yang and Guobin Liu and Chutao Liang and Sha Xue and Hao Chen and Ritsema, {Coen J.} and Violette Geissen",
year = "2017",
doi = "10.1016/j.chemosphere.2017.07.064",
language = "English",
volume = "185",
pages = "907--917",
journal = "Chemosphere",
issn = "0045-6535",
publisher = "Elsevier",

}

Response of soil dissolved organic matter to microplastic addition in Chinese loess soil. / Liu, Hongfei; Yang, Xiaomei; Liu, Guobin; Liang, Chutao; Xue, Sha; Chen, Hao; Ritsema, Coen J.; Geissen, Violette.

In: Chemosphere, Vol. 185, 2017, p. 907-917.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Response of soil dissolved organic matter to microplastic addition in Chinese loess soil

AU - Liu, Hongfei

AU - Yang, Xiaomei

AU - Liu, Guobin

AU - Liang, Chutao

AU - Xue, Sha

AU - Chen, Hao

AU - Ritsema, Coen J.

AU - Geissen, Violette

PY - 2017

Y1 - 2017

N2 - Plastic debris is accumulating in agricultural land due to the increased use of plastic mulches, which is causing serious environmental problems, especially for biochemical and physical properties of the soil. Dissolved organic matter (DOM) plays a central role in driving soil biogeochemistry, but little information is available on the effects of plastic residues, especially microplastic, on soil DOM. We conducted a soil-incubation experiment in a climate-controlled chamber with three levels of microplastic added to loess soil collected from the Loess Plateau in China: 0% (control, CK), 7% (M1) and 28% (M2) (w/w). We analysed the soil contents of dissolved organic carbon (DOC), dissolved organic nitrogen (DON), NH4 +, NO3 −, dissolved organic phosphorus (DOP), and PO4 3− and the activities of fluorescein diacetate hydrolase (FDAse) and phenol oxidase. The higher level of microplastic addition significantly increased the nutrient contents of the DOM solution. The lower level of addition had no significant effect on the DOM solution during the first seven days, but the rate of DOM decomposition decreased in M1 between days 7 and 30, which increased the nutrient contents. The microplastic facilitated the accumulation of high-molecular-weight humic-like material between days 7 and 30. The DOM solutions were mainly comprised of high-molecular-weight humic-like material in CK and M1 and of high-molecular-weight humic-like material and tyrosine-like material in M2. The Microplastic stimulated the activities of both enzymes. Microplastic addition thus stimulated enzymatic activity, activated pools of organic C, N, and P, and was beneficial for the accumulation of dissolved organic C, N and P.

AB - Plastic debris is accumulating in agricultural land due to the increased use of plastic mulches, which is causing serious environmental problems, especially for biochemical and physical properties of the soil. Dissolved organic matter (DOM) plays a central role in driving soil biogeochemistry, but little information is available on the effects of plastic residues, especially microplastic, on soil DOM. We conducted a soil-incubation experiment in a climate-controlled chamber with three levels of microplastic added to loess soil collected from the Loess Plateau in China: 0% (control, CK), 7% (M1) and 28% (M2) (w/w). We analysed the soil contents of dissolved organic carbon (DOC), dissolved organic nitrogen (DON), NH4 +, NO3 −, dissolved organic phosphorus (DOP), and PO4 3− and the activities of fluorescein diacetate hydrolase (FDAse) and phenol oxidase. The higher level of microplastic addition significantly increased the nutrient contents of the DOM solution. The lower level of addition had no significant effect on the DOM solution during the first seven days, but the rate of DOM decomposition decreased in M1 between days 7 and 30, which increased the nutrient contents. The microplastic facilitated the accumulation of high-molecular-weight humic-like material between days 7 and 30. The DOM solutions were mainly comprised of high-molecular-weight humic-like material in CK and M1 and of high-molecular-weight humic-like material and tyrosine-like material in M2. The Microplastic stimulated the activities of both enzymes. Microplastic addition thus stimulated enzymatic activity, activated pools of organic C, N, and P, and was beneficial for the accumulation of dissolved organic C, N and P.

KW - Dissolved organic carbon (DOC)

KW - Dissolved organic nitrogen (DON)

KW - Dissolved organic phosphorus (DOP)

KW - Excitation-emission matrix (EEM)

KW - Microplastic

U2 - 10.1016/j.chemosphere.2017.07.064

DO - 10.1016/j.chemosphere.2017.07.064

M3 - Article

VL - 185

SP - 907

EP - 917

JO - Chemosphere

JF - Chemosphere

SN - 0045-6535

ER -