Aluminum toxicity and ecological risk assessment of dried alum residual into surface water disposal

2013 ◽  
Vol 8 (1) ◽  
pp. 1-10
Author(s):  
Maruf Mortula ◽  
Graham A. Gagnon ◽  
Shannon M. Bard ◽  
Margaret E. Walsh
Keyword(s):  
Risk Assessment ◽  
Surface Water ◽  
Ecological Risk ◽  
Ecological Risk Assessment ◽  
Aluminum Toxicity ◽  
Water Disposal

Aluminum toxicity and ecological risk assessment of dried alum residual into surface water disposalA paper submitted to the Journal of Environmental Engineering and Science.

2009 ◽  
Vol 36 (1) ◽  
pp. 127-136 ◽  
Author(s):  
Maruf Mortula ◽  
Shannon M. Bard ◽  
Margaret E. Walsh ◽  
Graham A. Gagnon
Keyword(s):  
Risk Assessment ◽  
Surface Water ◽  
Ecological Risk ◽  
Ecological Risk Assessment ◽  
Potential Risk ◽  
Lake Water ◽  
Aluminum Toxicity ◽  
Aluminum Concentration ◽  
Lethal Toxicity ◽  
Lake Waters

This paper presented a simplified ecological risk assessment of the toxicity of alum residuals from water treatment plants to surface water that is based on the framework recommended by United States Environmental Protection Agency (USEPA). Though few studies have investigated the potential for increased aluminum toxicity with discharge of alum residual streams to the aquatic environment, none have explored the use of ecological risk assessment methodologies to gain additional insight into the potential risk. This systematic approach has been used to elucidate the process of aluminum toxicity from oven-dried alum residuals on aquatic habitats. A laboratory experiment was performed to assess the leaching of dried alum residuals to five lake water samples. The tests were also done to evaluate the effect of pH levels (4, 5.5, and 7) and drying mechanism of alum residual (oven, air or freeze–thaw). Total inorganic aluminum leaching from laboratory analysis was used along with toxicity reference values to determine a risk quotient (RQ) for assessment of risk. Results revealed that alum residuals in surface water could reduce aluminum concentration or potential risk (RQ) for fish in some lake waters at natural pH levels. Surface water pH and drying mechanism of alum residuals did not have considerable effect on leachability of aluminum. Lake waters with and without the addition of alum residual showed a potential risk for chronic sub-lethal toxicity for trout species. Both chronic and acute lethal toxicity was observed in some tests depending on the initial aluminum concentrations in the lake water. A detailed review of toxicological effects of aluminum, its exposure and bioaccumulation was studied for appropriate risk assessment.

Ecological risk assessment of current-use pesticides and biocides in soils, sediments and surface water of a mixed land-use basin of the Pampas region, Argentina

Chemosphere ◽  
2021 ◽  
Vol 263 ◽  
pp. 128061
Author(s):  
Débora J. Pérez ◽  
Fernando G. Iturburu ◽  
Gabriela Calderon ◽  
Lía A.E. Oyesqui ◽  
Eduardo De Gerónimo ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Land Use ◽  
Surface Water ◽  
Ecological Risk ◽  
Ecological Risk Assessment ◽  
Mixed Land Use ◽  
Pampas Region

scholarly journals Occurrence, Distribution, and Ecological Risk Assessment of Antibiotics in Selected Urban Lakes of Hanoi, Vietnam

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Hong Anh Duong ◽  
Thi Vi Phung ◽  
Thuy Ngoc Nguyen ◽  
Lan-Anh Phan Thi ◽  
Hung Viet Pham
Keyword(s):  
Risk Assessment ◽  
Surface Water ◽  
Ecological Risk ◽  
Ecological Risk Assessment ◽  
Ultra Performance Liquid Chromatography ◽  
Tandem Mass ◽  
High Solubility ◽  
Solubility In Water ◽  
Antibiotic Group ◽  
And Behavior

Residue concentrations of fifteen antibiotics including sulfonamides, quinolones, macrolides, β-lactams, and trimethoprim in lakes from Hanoi metropolitan area, Vietnam, were analyzed using ultra-performance liquid chromatography coupled with tandem mass spectrometry (UPLC/MS-MS) to elucidate their occurrence and behavior in urban environment. For surface water, the average concentrations of five antibiotic classes decreased in the order: sulfonamides (117.9 ng/L) > β-lactams (31.28 ng/L) > quinolones (20.19 ng/L) > macrolides (17.74 ng/L) > trimethoprim (8.93 ng/L). While the highest concentration of SMX was detected at 806.5 ng/L in surface water, those obtained in sediment were only at 1.35 ng/g because of their high solubility in water. Quinolones were found at a maximal concentration of 158.7 ng/L for OFL in water phase whereas those in sediment phase were 4,017 ng/g due to their great affinity in sediment. These findings revealed the different fate and release mechanisms of each antibiotic group in the environment. The ecological risk assessment implied some targeted compounds, and in particular, OFL and AZM could pose high risks to algae in the aquatic ecosystem.

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