Determination of Volatile Organic Compounds in Water

Vidal, Lorena; Domini, Claudia E.; Canals, Antonio

doi:10.1201/b15314-25

Cited by 2 publications

(3 citation statements)

References 1 publication

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Section: Resultsmentioning

confidence: 99%

“…COD is elevated when there is industrial discharge and is an important test to determine the organic content of effluents that may contain toxic substances (Vidal et al, 2014). In addition, conductivity is above the reference values set by CETESB at RM and IP, indicating the presence of dissolved inorganic solids and metals (Vidal et al, 2014). Metals may occur naturally in soils and are leached into water by the action of rain, or they may be due to industrial, agricultural or other anthropogenic activity (Qu et al, 2014).…”

Section: Resultsmentioning

confidence: 99%

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Tissue levels of the antioxidant enzymes superoxide dismutase and catalase in fish Astyanax bimaculatus from the Una River Basin

Batista¹,

Feijó-Oliveira²,

Ribeiro³

et al. 2014

Rev. ambiente água

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This paper seeks to identify the biomarker response to oxidative stress in Astyanax bimaculatus, a freshwater fish, collected from the Una River and its associated water bodies. The fish were collected using fishing nets at three different points on the river basin, namely Fazenda Piloto (FP), Ipiranga (IP) and Remédios (RM), during the period from December 2013 to March 2014. Physical and chemical analyses of the water at the sample locations indicate that IP and RM possibly have larger concentration of either natural or anthropic pollutants as compared to FP. FP can therefore be considered as the point less impacted by pollutants than other points. Hepatic activity of antioxidant stress enzymes, superoxide dismutase (SOD) and catalase (CAT), were measured in the specimens. The levels of SOD were reduced at RM while they were elevated in fish collected at IP. The CAT levels for the fish at RM and IP were about 148.9% and 202.4% above the values at FP, respectively. These results suggest that antioxidant enzymes could be used as biomarkers to measure oxidative stress caused by pollutants in the Una River Basin.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Tissue levels of the antioxidant enzymes superoxide dismutase and catalase in fish Astyanax bimaculatus from the Una River Basin

Batista¹,

Feijó-Oliveira²,

Ribeiro³

et al. 2014

Rev. ambiente água

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“…Chemical oxygen demand (COD) is used to measure the amount of dissolved organic matter (DOM) in water (oxygen needed to reduce organic matter in water by chemical methods) and is a useful measure of wastewater quality [ 47 ]. COD was used to estimate the DOM concentration in the supernatant (i.e., sludge activity).…”

Section: Methodsmentioning

confidence: 99%

Interaction Between a Bacterivorous Ciliate Aspidisca cicada and a Rotifer Lecane inermis: Doozers and Fraggles in Aquatic Flocs

et al. 2017

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Activated sludge is a semi-natural habitat composed of macroaggregates made by flocculating bacteria and inhabited by numerous protozoans and metazoans, creating a complicated interactome. The activated sludge resembles the biological formation of naturally occurring floc habitats, such as Bmarine snow.^So far, these two types of habitat have been analyzed separately, despite their similarities. We examined the effect of a bacterivorous ciliate, Aspidisca cicada, on the quality of the macroaggregate ecosystem by estimating (i) the floc characteristics, (ii) the proliferation of other bacterivores (rotifers), and (iii) the chemical processes. We found that A. cicada (i) positively affected floc quality by creating flocs of larger size; (ii) promoted the population growth of the rotifer Lecane inermis, an important biological agent in activated sludge systems; and (iii) increased the efficiency of ammonia removal while at the same time improving the oxygen conditions. The effect of A. cicada was detectable long after its disappearance from the system. We therefore claim that A. cicada is a very specialized scavenger of flocs with a key role in floc ecosystem functioning. These results may be relevant to the ecology of any natural and engineered aggregates.

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Determination of Volatile Organic Compounds in Water

Cited by 2 publications

References 1 publication

Tissue levels of the antioxidant enzymes superoxide dismutase and catalase in fish Astyanax bimaculatus from the Una River Basin

Tissue levels of the antioxidant enzymes superoxide dismutase and catalase in fish Astyanax bimaculatus from the Una River Basin

Interaction Between a Bacterivorous Ciliate Aspidisca cicada and a Rotifer Lecane inermis: Doozers and Fraggles in Aquatic Flocs

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