Polyethylene microplastics interfere with the nutrient cycle in water-plant-sediment systems
文献类型：期刊论文
| 作者 | Yu, Hongwei ; Liu, Miaomiao; Gang, Diga; Peng, Jianfeng; Hu, Chengzhi; Qu, Jiuhui
|
| 刊名 | WATER RESEARCH
 |
| 出版日期 | 2022-05-01 |
| 卷号 | 214期号:0页码:118191 |
| ISSN号 | 0043-1354 |
| 关键词 | CONSTRUCTED WETLANDS NANOPARTICLES NANOPLASTICS PHOSPHORUS TOOL |
| 英文摘要 | Increasing microplastic (MP) pollution and its effects on aquatic systems have become a global issue; however, the impact of MPs on biogeochemical cycles is poorly understood. A simulation study was performed to analyse the influence of polyethylene (PE) microplastics on the morphological, physiological, and stoichiometric (C, N, P) characteristics of submerged plants, and to investigate their effects on the nutrient cycle and microbial community in freshwater sediment. The results showed that PE-MPs treatments significantly decreased leaf nitrogen and carbon contents. Exposure to 1% PE-MPs suppressed the plant height, total biomass, root activity, and relative growth rate of Vallisneria natans. Decrease in dissolved oxygen (DO) concentrations (19.93-40.26%) were observed in the 1% PE-MPs treatment group compared to that in the control between 1 and 6 days. The activities of enzymes (ammonia monooxygenase and nitrate reductase) related to the nitrogen cycle were significantly altered by the addition of PE-MPs. We found that PE-MPs acted as obstacle disruptors, resulting in a reduction in the release of nitrogen and phosphorus from the sediment to the overlying water. This is because PE-MPs significantly alter the composition and metabolic properties of the microbial communities in sediments, the plant growth, and the nutrient cycle. These findings helped evaluate the impacts of PE-MPs on the water-plant-sediment system and on the biogeochemical cycles of the freshwater ecosystems. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47717]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 通讯作者 | Hu, Chengzhi |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China 2.Tsinghua Univ, Ctr Water & Ecol, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Hongwei,Liu, Miaomiao,Gang, Diga,et al. Polyethylene microplastics interfere with the nutrient cycle in water-plant-sediment systems[J]. WATER RESEARCH,2022,214(0):118191. |
| APA | Yu, Hongwei,Liu, Miaomiao,Gang, Diga,Peng, Jianfeng,Hu, Chengzhi,&Qu, Jiuhui.(2022).Polyethylene microplastics interfere with the nutrient cycle in water-plant-sediment systems.WATER RESEARCH,214(0),118191. |
| MLA | Yu, Hongwei,et al."Polyethylene microplastics interfere with the nutrient cycle in water-plant-sediment systems".WATER RESEARCH 214.0(2022):118191. |
入库方式： OAI收割
来源：生态环境研究中心
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