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

2011 ◽  
Vol 356-360 ◽  
pp. 624-629 ◽  
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.

scholarly journals ECOLOGICAL RISK ASSESSMENT OF A TROPICAL LAKE SYSTEM

2013 ◽  
pp. 323-329 ◽  
Author(s):  
K. Swarnalatha ◽  
J. Letha ◽  
S. Ayoob
Keyword(s):  
Risk Assessment ◽  
Ecological Risk ◽  
Sediment Quality ◽  
Contamination Factor ◽  
Tropical Lake ◽  
Risk Category ◽  
Sand Mining ◽  
Waste Discharge ◽  
Quality Guidelines ◽  
Risk Indices

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.

scholarly journals Distribution Characteristics and Risk Assessment of Mercury in Sediments From Taihu Lake

2021 ◽  
Vol 9 ◽  
Author(s):  
Hailei Su ◽  
Di Shi ◽  
Jiwei Yang ◽  
Yanru Tao ◽  
Fuhong Sun ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Ecological Risk ◽  
Taihu Lake ◽  
Sediment Quality ◽  
Quality Criterion ◽  
Middle Level ◽  
Risk Level ◽  
Distribution Characteristics ◽  
Persistent Pollutants ◽  
Hg Pollution

Persistent pollutants are easily accumulated in sediments, which can cause toxicity to benthos and secondary pollution to water. Mercury (Hg), as one kind of bioaccumulative and persistent pollutant, could cause great harm to water ecology and health, and has been widely concerned. The distribution characteristics and ecological risk of Hg in sediments from Taihu Lake were studied. In addition, the sediment quality criterion (SQC) of Hg was derived using tissue-based toxicity data combined with the phase-equilibrium partitioning (EqP) approach, and the ecological risk level of Hg in Taihu Lake sediment was evaluated. The results showed that Hg was detected in all the 30 sediment samples, and the concentrations of Hg ranged from 9.7 ng/g to 237.0 ng/g, with an average of 76.3 ng/g. The SQC of Hg was calculated to be 108.9 ng/g, and the ecological risk of Hg in the sediments of Taihu Lake is in the middle level, indicating that Hg pollution needs to be paid more attention. The results provide support for environmental management and risk assessment of Hg.

scholarly journals Occurrence and distribution of pharmaceuticals in surface water and sediment of Buffalo and Sundays River estuaries, South Africa and their ecological risk assessment

2021 ◽  
Vol 7 ◽  
pp. 187-195
Author(s):  
Chinemerem Ruth Ohoro ◽  
Abiodun Olagoke Adeniji ◽  
Lucy Semerjian ◽  
Omobola Oluranti Okoh ◽  
Anthony Ifeanyi Okoh
Keyword(s):  
South Africa ◽  
Risk Assessment ◽  
Surface Water ◽  
Ecological Risk ◽  
Ecological Risk Assessment ◽  
Water And Sediment

scholarly journals Screening level ecological risk assessment for phenols in surface water of the Taihu Lake

Chemosphere ◽  
2010 ◽  
Vol 80 (9) ◽  
pp. 998-1005 ◽  
Author(s):  
Wenjue Zhong ◽  
Donghong Wang ◽  
Xiaowei Xu ◽  
Qian Luo ◽  
Bingyi Wang ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Surface Water ◽  
Ecological Risk ◽  
Ecological Risk Assessment ◽  
Taihu Lake
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