Effect of Low-density Polyethylene Microplastics on Natural Attenuation of Oxygenated Polycyclic Aromatic Hydrocarbons in Soil

被引：0
|
作者：
Tang J.-H. [1 ]
Bao W.-X. [1 ]
Zhang W. [1 ]
Li Y.-T. [1 ]
Gu P. [1 ]
Wu J.-Z. [3 ]
Lu Y. [2 ]
机构：
[1] Shandong Provincial Key Laboratory of Applied Microbiology, Ecology Institute of Shandong Academy of Sciences, Qilu University of Technology, Shandong Academy of Sciences, Jinan
[2] College of Environmental Science and Engineering, Nankai University, Tianjin
[3] China Testing Holding Group Jingcheng Testing Co. ，Ltd., Guangzhou
来源：
Huanjing Kexue/Environmental Science | 2024年 / 45卷 / 06期
关键词：
bacterial communities; low-density polyethylene（LDPE）; microplastics（MPs）; natural attenuation; oxygen-containing polycyclic aromatic hydrocarbons（OPAHs）;
D O I：
10.13227/j.hjkx.202307054
中图分类号：
学科分类号：
摘要：
The continuous accumulation of microplastics in agricultural soils may affect the natural attenuation of oxygen-containing polycyclic aromatic hydrocarbons（OPAHs）. The effects of low-density polyethylene（LDPE）microplastics with the spiking proportion of 1% and 0.01% in soils on the natural attenuation of OPAHs were investigated via soil microcosm experiments. The relation between the response of bacterial communities and OPAHs dissipation was also explored. The initial content of OPAHs in the soil was 34.6 mg·kg−1. The dissipation of OPAHs in the soil on day 14 was inhibited by LDPE. The contents of OPAHs in LDPE groups were higher than that in the control by 0.9-1.6 mg·kg−1，and the inhibition degree increased with the proportion of LDPE. The contents of OPAHs were not significantly different among groups on day 28，indicating that the inhibitory effect of LDPE disappeared. LDPE did not change the composition of the dominant taxa in the OPAHs-contaminated soil community but influenced the relative abundances of some dominant taxa. LDPE increased the relative abundance of Proteobacteria and Actinobacteria at the phylum level and decreased that of Bacillus and increased those of Micromonospora，Sphingomonas，and Nitrospira（potential degrading bacteria of LDPE and endogenous substances）at the genus level，all four of which were the main genera dominating intergroup community differences. LDPE changed the α and β diversity of bacterial communities，but the extents were not significant. LDPE affected the function of the bacterial community，reducing the total abundance of PAHs-degrading genes and some degrading enzymes，inhibiting the growth of PAHs-degrading bacteria and thus interfering with the natural decay of OPAHs. © 2024 Science Press. All rights reserved.
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页码：3688 / 3699
页数：11
相关论文
共 48 条
  • [1] Blasing M，, Amelung W., Plastics in soil：analytical methods and possible sources［J］, Science of the Total Environment, 612, pp. 422-435, (2018)
  • [2] Hale R C，, Seeley M E, La Guardia M J，, Et al., A global perspective on microplastics［J］, Journal of Geophysical Research：Oceans, 125, 1, (2020)
  • [3] Shim W J, Eo S., Marine microplastics：abundance，distribution， and composition ［A］, Microplastic Contamination in Aquatic Environments： An Emerging Matter of Environmental Urgency, pp. 1-26, (2018)
  • [4] Li Y，, Xie H X，, Ren Z H，, Et al., Response of soil microbial community parameters to plastic film mulch：a meta-analysis［J］, Geoderma, (2022)
  • [5] Zhang Q Q, Ma Z R，, Cai Y Y，, Et al., Agricultural plastic pollution in China：generation of plastic debris and emission of phthalic acid esters from agricultural films ［J］, Environmental Science & Technology, 55, 18, pp. 12459-12470, (2021)
  • [6] Liu Y，, Shao H，, Liu J N，, Et al., Transport and transformation of microplastics and nanoplastics in the soil environment：a critical review［J］, Soil Use and Management, 37, 2, pp. 224-242, (2021)
  • [7] Thompson R C，, Olsen Y，, Mitchell R P，, Et al., Lost at sea：where is all the plastic？［J］, Science, 304, 5672, (2004)
  • [8] Bo L J，, Li B，Zhang Ket al., Distribution，sources，and behavioral characteristics of microplastics in farmland soil［J］, Environmental Science, 44, 4, pp. 2375-2383, (2023)
  • [9] Hu X J，, Gu H D, Wang Y B，, Et al., Succession of soil bacterial communities and network patterns in response to conventional and biodegradable microplastics：a microcosmic study in Mollisol［J］, Journal of Hazardous Materials, (2022)
  • [10] Liu L Y，, Zou G Y，, Zuo Q，, Et al., Soil bacterial community and metabolism showed a more sensitive response to PBAT biodegradable mulch residues than that of LDPE mulch residues ［J］, Journal of Hazardous Materials, (2022)
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