Derivation and Use of Sediment Quality Guidelines for Ecological Risk Assessment of Metals and Radionuclides Released to the Environment from Uranium Mining and Milling Activities in Canada

Risk analysis of urban aquatic systems due to heavy metals turns significant due to their peculiar properties viz. persistence, non-degradability, toxicity, and accumulation. Akkulam Veli (AV), an urban tropical lake in south India is subjected to various environmental stresses due to multiple waste discharge, sand mining, developmental activities, tourism related activities etc. Hence, a comprehensive approach is adopted for risk assessment using modified degree of contamination factor, toxicity units based on numerical sediment quality guidelines (SQGs), and potentialecological risk indices. The study revealed the presence of toxic metals such as Cr,Cd, Pb and As and the lake is rated under ‘low ecological risk’ category.

Download Full-text

Heavy metal concentrations and ecological risk assessment of the suspended sediments of a multi-contaminated Brazilian watershed

Acta Scientiarum Agronomy ◽

10.4025/actasciagron.v41i1.42620 ◽

2019 ◽

Vol 41 (1) ◽

pp. 42620 ◽

Cited By ~ 2

Author(s):

Yuri Jacques Agra Bezerra da Silva ◽

José Ramon Barros Cantalice ◽

Vijay Pal Singh ◽

Clístenes Williams Araújo do Nascimento ◽

Bradford Paul Wilcox ◽

...

Keyword(s):

Risk Assessment ◽

Ecological Risk ◽

Ecological Risk Assessment ◽

Sediment Quality ◽

Suspended Sediments ◽

Pollution Indices ◽

Multivariate Techniques ◽

Metal Concentrations ◽

Guideline Values ◽

Downstream Section

Metal concentrations in suspended sediments of one of the most polluted rivers in Brazil were measured. Concentrations of Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn were determined by inductively coupled plasma while Hg and As were analyzed with hydride generation flow injection atomic absorption spectroscopy. Contamination of As, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb, and Zn was assessed using pollution indices, ecological risk assessment, statistical multivariate techniques and comparison with sediment quality guidelines. Suspended sediments of the upstream portion of the Ipojuca River are moderately contaminated, especially with Mn and As. On the other hand, sediments of the downstream section are highly contaminated, mainly with Zn, Pb, and As. Furthermore, the mean Ei (potential ecological risk) values of Pb and As showed considerable ecological risk in the downstream cross section. The comparison of our data with sediment guideline values indicated that the concentrations of Mn and Pb in the upstream section of the Ipojuca River pose a risk to sediment-dwelling organisms, while Pb and Zn are the metals of concern in the downstream section.

Download Full-text

Sediment Quality and Ecological Risk Assessment of Bera Lake

Applied Limnology ◽

10.1007/978-4-431-54980-2_5 ◽

2014 ◽

pp. 135-182

Author(s):

Mohammadreza Gharibreza ◽

Muhammad Aqeel Ashraf

Keyword(s):

Risk Assessment ◽

Ecological Risk ◽

Ecological Risk Assessment ◽

Sediment Quality ◽

Bera Lake

Download Full-text

Risk Assessment of Organochlorine Compounds in Water and Surface Sediments from Taihu Lake and Nanjing Section of Changjiang, China

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.356-360.624 ◽

2011 ◽

Vol 356-360 ◽

pp. 624-629 ◽

Cited By ~ 1

Author(s):

Xu Yin Yuan ◽

Quan Liu ◽

Ji Zhou Li ◽

Jun Feng Ji ◽

Chang Ping Mao

Keyword(s):

Risk Assessment ◽

Surface Water ◽

Ecological Risk ◽

Surface Sediments ◽

Taihu Lake ◽

Sediment Quality ◽

Organochlorine Compounds ◽

Quality Guidelines ◽

Water And Sediment ◽

Low Levels

Samples of surface water and sediment were collected in Taihu Lake and Nanjing section of Changjiang. Organochlorine compounds(OCCs) of samples were detected to investigate the characteristics and ecological risk of them in the lake and river. The concentrations of OCCs in water of Nanjing section of Changjiang were higher than those in Taihu Lake, but the concentrations of OCCs in sediments were higher in Taihu Lake. HCHs of Taihu sediments were relatively enriched, indicating the agricultural source of compounds. PCBs of Changjiang sediments were higher compared to Taihu sediments, denoting a obvious industrial source. Comparing with other compartments in China, HCHs of the study area were higher than most sediment of Chinese rivers, DDTs didn’t show high contents in sediments, PCBs was in relatively low levels. By contrast with the relevant sediment quality guidelines of these compounds, the ecological risk of OCCs in sediments were evaluated. The OCCs of sediments in Taihu Lake and Nanjing section of Changjiang didn’t show high ecological risk.

Download Full-text