互花米草
湿地
环境化学
环境科学
污染
芦苇
污染物
生态系统
污染
三角洲
沉积物
生态学
化学
沼泽
生物
古生物学
工程类
航空航天工程
作者
Zaiwang Zhang,Tongrui Zhang,Wenhao Yu,Jikun Xu,Jialiang Li,Tao Wu,Suzhe Liu,Haiyang Wang,Yuxia Wang,Shuai Shang,Aoxiang Lin
出处
期刊:Toxics
[MDPI AG]
日期:2022-07-04
卷期号:10 (7): 374-374
被引量:2
标识
DOI:10.3390/toxics10070374
摘要
Heavy metals are major pollutants that pose threats to wetland environments. In the present study, surface sediments from wetlands vegetated by invasive species Spartina alterniflora in the Yellow River Delta were collected and determined for the mass fractions of Co, Ni, As, Cd and Pb. Results showed mass fractions of Co, Ni, As, Cd and Pb in the sediments of the S. alterniflora communities ranged from 8.5 to 16.0, 13.9–27.9, 3.2–13.8, 0.08–0.24, and 17.6–37.5 mg/kg dw, respectively, generally presenting an order of Pb > Ni > Co > As > Cd. The levels of heavy metals in sediments in the S. alterniflora communities were higher than those in the wetland vegetated by the native plant species Suaeda heteroptera. Correlations among metal elements were highly significant, suggesting that they might have the same sources. Clay and TOC were important factors affecting the spatial distribution of metals. The Igeo values of the investigated elements in the sediments were frequently lower than 0, revealing the slight pollution status of these metals. Relatively slight values of Eri and RI suggested that the potential ecological risks caused by the 5 metals were low. Our findings could provide a better understanding of the correlation between metal pollution and bio-invasion in wetland ecosystems.
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