Spatial-temporal-biological accumulation effect and its potential ecological risk of five heavy metals in an urban wetland of plateau region

1st International Global on Renewable Energy and Development

Yang, Dengxing^1,2 ; Mao, Xufeng^2,3 ; Tao, Yaqin^4 ; Zhang, Zhifa^4 ; Wei, Xiaoyan^5

School of Geography and Tourism, Shaanxi Normal University, Xi'an, Shanxi Province

710062, China^1

College of Geography Sciences, Qinghai Normal University, Qinghai, Xining

810000, China^2

Key Laboratory of Natural Geography and Environmental Process of Qinghai Province, Xining, Qinghai Province

810000, China^3

Huangshui National Wetland Park, Xining, Qinghai

810000, China^4

School of Economics and Management, Qinghai Normal University, Xining, Qinghai Province

810000, China^5

关键词: Accumulation effects;    Chemical and biologicals;    Constructed wetlands;    Downstream wetlands;    Ecological managements;    Geo-accumulation index;    Heavy metal accumulation;    Potential ecological risk;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/100/1/012198/pdf
DOI  :  10.1088/1755-1315/100/1/012198

来源: IOP

【 摘 要 】

Wetlands are facing enormous ecological risk at the same time of absorbing and accumulating heavy metals through the physical, chemical and biological processes. This study focuses on the heavy metal accumulation effect (AE) and its potential ecological risk (PER) of the Houshaogou urban cascade constructed wetland, located in the Xining City of Qinghai Province in China. By using the geoaccumulation index (Igeo) conjoint with PER index (E), the current study analyzed AE and PER of five kinds of common heavy metals (Cd, Cr, Pb, Asand Zn) in spatial, temporal and biological three scale. Results showed that three kinds of heavy metals (Cd, Cr and Zn) exhibited different levels of AE (0 geod, Crand Zngradually increased from upstream wetlands to downstream wetlands. Heavy metals Crand Zn, except for Cd, are at low level of PER (Ed, Cr and Znpresented accumulation effects (0 geod(80≤ECddpresented a higher level of AE (1geo