Spatiotemporal variation and potential risks of seven heavy metals in seawater, sediment, and seafood in Xiangshan Bay, China (2011–2016)

Chemosphere ◽  
2018 ◽  
Vol 212 ◽  
pp. 1163-1171 ◽  
Author(s):  
Binfeng Zhao ◽  
Ximing Wang ◽  
Hangbiao Jin ◽  
Huiqiang Feng ◽  
Guang Shen ◽  
...  
Chemosphere ◽  
2021 ◽  
pp. 132768
Author(s):  
Peng Liu ◽  
Qiumei Wu ◽  
Xinkai Wang ◽  
Wenyou Hu ◽  
Xiaoyan Liu ◽  
...  

2014 ◽  
Vol 33 (4) ◽  
pp. 101-107 ◽  
Author(s):  
Weiping Sun ◽  
Jianjun Yu ◽  
Xiaoqun Xu ◽  
Weiyan Zhang ◽  
Ruijuan Liu ◽  
...  
Keyword(s):  

2020 ◽  
Vol 2020 ◽  
pp. 1-13 ◽  
Author(s):  
Xia Sun ◽  
Bao-Shi Li ◽  
Xuan-Li Liu ◽  
Cheng-Xuan Li

Coastal waters are polluted by heavy metals to varying degrees, posing potential risks to marine ecology and human health. In May 2006, the pollution levels, sources, and ecological risks of heavy metals (Cu, Pb, Zn, Cd, Hg, and As) in seawater, surface sediments, and living organisms were studied in Jiuzhen Bay in Fujian, China. This study identified Hg (0.26–0.72 µg/L) and As (20.3–31.5 µg/L) pollution in the seawater of Jiuzhen Bay. In sediments, heavy Pb pollution (946 µg/g dw) was only detected at one station at a level posing very serious potential risk, while Hg pollution (0.052–0.087 µg/g dw) was observed at three stations at a level posing serious potential risk. No heavy metal pollution was detected in sediments at other stations. The concentrations of five heavy metals (Cu, Zn, As, Cd, and Pb) exceeded the corresponding National Quality Standards for oysters, indicating heavy pollution, based on an ecological risk assessment. In clams, two heavy metals (Pb and As) exceeded the standards, indicating light pollution, based on an ecological risk assessment. No heavy metal pollution was found in fish or shrimps. The heavy metals in the seawater and sediments of Jiuzhen Bay are mainly derived from the river discharges of Luxi and Wujiang Rivers although sewage discharge along the coast of Jiuzhen Bay is another source of heavy metal pollution at some stations. Given the pollution of Pb, Hg, and As in seawater and sediments at some stations within the bay, the potential risks of Pb, Hg, and As in living organisms to both the marine ecology and human health deserve increased attention.


Chemosphere ◽  
2021 ◽  
Vol 263 ◽  
pp. 127983 ◽  
Author(s):  
Maria Filippini ◽  
Anna Baldisserotto ◽  
Simonetta Menotta ◽  
Giorgio Fedrizzi ◽  
Silva Rubini ◽  
...  

2020 ◽  
Vol 12 (4) ◽  
pp. 1300 ◽  
Author(s):  
Hong ◽  
Zhao ◽  
Chang ◽  
Peng ◽  
Wang ◽  
...  

Assessing spatiotemporal variation in water quality and heavy metals concentrations in wetlands and identifying metal contamination source are crucial steps for the protection and sustainable utilization of water resources. Using the water quality identification index (Iwq), heavy metal pollution index (HPI), hierarchical cluster analysis (HCA) and redundancy analysis (RDA), we evaluated spatiotemporal variation in water quality and heavy metals concentrations, and their interrelation in wetlands along the middle and lower Yellow River. The average Iwq was highest during flood season but the average HPI was lowest in the same season. Meanwhile, the trend in mean HPI across three hydrological seasons was the opposite to that of mean Iwq. There was significant variation in wetlands water pollution status across seasons. During the flood season, the wetlands in the affected area with hanging river were seriously polluted. In other seasons, pollution in the artificial wetlands was even more severe. Moreover, serious pollution of wetlands in belt transect #03 (Yuanyang-Zhongmu) was more frequent. Dissolved oxygen and chemical oxygen demand strongly influenced heavy metal concentrations, while other water quality parameters had different influences on heavy metal concentrations in different hydrological seasons. The causes of water pollution were divided into natural factors and human disturbance (with potential relationships between them). The polluted wetlands were greatly affected by the Yellow River during the flood season while they were more impacted by agricultural and domestic sewage discharge in other seasons. However, heavy metal deposition and leaching into riparian wetlands were still affected by diverse channel conditions. If this trend is allowed to continue unabated, wetlands along the middle and lower Yellow River are likely to lose their vital ecological and social functions.


Sign in / Sign up

Export Citation Format

Share Document