Identification of heavy metal pollution in estuarine sediments under long-term reclamation: Ecological toxicity, sources and implications for estuary management

2021 ◽  
Vol 290 ◽  
pp. 118126
Author(s):  
Lixia Niu ◽  
Jiayi Li ◽  
Xiangxin Luo ◽  
Tao Fu ◽  
Ou Chen ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Estuarine Sediments ◽  
Estuary Management ◽  
Toxicity Sources

Long-term heavy metal pollution varied female reproduction investment in free-living anura, Bufo raddei

2018 ◽  
Vol 159 ◽  
pp. 136-142 ◽  
Author(s):  
Wenya Zhang ◽  
Rui Guo ◽  
Shiwei Ai ◽  
Ying Yang ◽  
Jian Ding ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Female Reproduction ◽  
Free Living

scholarly journals Application of Pollution Indices for Evaluation of Long-Term Accumulation of Heavy Metals in Lake Modrac in Bosnia and Hercegovina

2017 ◽  
Vol 14 (3-4) ◽  
Author(s):  
Nusreta Djonlagic
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Ecological Risk ◽  
Water Body ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Pollution Index ◽  
Pollution Indices ◽  
Geo Accumulation

In this study the results of a 15-year long monitoring survey on heavy metals in water at Lake Modrac were assessed using pollution indices of heavy metals, such as Heavy metal pollution index HPI, Heavy metal evaluation index HEI and the Degree of contamination CD. The results of the survey on heavy metal pollution of sediment conducted in 2015 were used as input data for the following pollution indices: Concentration factor , Pollution load index PLI, Enrichment factor EF, Index of geo-accumulation Igeo, Ecological risk factor , Potential ecological risk index to the water-body, RI. The results showed a good correlation and the lake sediment was characterized as polluted. Enrichment factors and indices of geo-accumulation of heavy metals were indicated as very high enriched in the sediment, and have been identified as an anthropogenic source of pollution. Cumulative presence in the sediment is assessed through the pollution index, RI, and has been assessed as moderate ecological risk to the lake water-body. The application of pollution indices presents a valuable tool in assessing the long-term pollution status of Lake Modrac.

scholarly journals Effect of Silene vulgaris and Heavy Metal Pollution on Soil Microbial Diversity in Long-Term Contaminated Soil

2017 ◽  
Vol 229 (1) ◽  
Author(s):  
Magdalena Pacwa-Płociniczak ◽  
Tomasz Płociniczak ◽  
Dan Yu ◽  
Jukka M. Kurola ◽  
Aki Sinkkonen ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Microbial Diversity ◽  
Contaminated Soil ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Silene Vulgaris ◽  
Soil Microbial Diversity ◽  
Soil Microbial

scholarly journals Study of Heavy Metals and Microbial Communities in Contaminated Sediments Along an Urban Estuary

2021 ◽  
Vol 8 ◽  
Author(s):  
Jun Yi ◽  
Linus Shing Him Lo ◽  
Hongbin Liu ◽  
Pei-Yuan Qian ◽  
Jinping Cheng
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Microbial Community ◽  
Microbial Communities ◽  
Ecological Risk ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Risk Index ◽  
Estuarine Sediments ◽  
Yangtze River Estuary

Estuarine sediments are increasingly contaminated by heavy metals as a result of urbanization and human activities. Continuous multi-heavy metal accumulation in the ecosystem can provoke new effects on top of the complex environmental interactions already present in estuarine ecosystems. It is important to study their integrated influence on imperative microbial communities to reflect on the environmental and ecological risks they may impose. Inductively coupled plasma optical emission spectroscopy analysis for five metals Cd, Cr, Cu, Pb, and Zn showed that Cr and Cu concentrations in intertidal sediments of the urbanized Yangtze River estuary in China have consistently exceeded respective threshold effect concentration (TEC) levels. The geo-accumulation and potential ecological risk index results of the five metals showed that all sampling sites were weakly to moderately polluted, and at considerable to high ecological risk, respectively. Redundancy and correlation analyses showed that Zn followed by Cr in the ecosystem were explanatory of the shifts in recorded microbial community structures. However, the spatial variation in metal concentrations did not correspond to the selection of metal resistance genes (MRGs). Unlike many other dominant bacterial taxa, most of the sulfate-reducing bacteria (SRB) and associated sulfate respiration as the dominant microbially contributed ecological function were found to negatively correlate with Zn and total heavy metal pollution. Zn concentration was proposed to be a potent indicator for heavy metal pollution-associated microbial community compositional shifts under urbanized estuarine conditions. The associations between heavy metals and estuarine microbial communities in this study demonstrate the influence of heavy metals on microbial community structure and adaptations that is often overshadowed by environmental factors (i.e., salinity and nutrients).

Sign in / Sign up

Export Citation Format

Share Document