Immobilized Enzymes and Heavy Metals in Sediments of Venice Internal Canals

Sabil, N.; Aissouni, Youssef; Coletti-Previero, Maria-Antonia; Donazzolo, R.; D'Ippolito, Rocco; Pavoni, Bruno

doi:10.1080/09593331608616315

Cited by 5 publications

(2 citation statements)

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“…The canal sediments are very rich in organic carbon (about 17%) with low Eh (about À200 mV).The grain size of the sediments is fine (,63 lm more than 80%); however, grain size in the canals, where hydrodynamic energy is high, become coarser. Venice City Canal data refer to surface sediments (upper 15 cm) and were derived from several studies (Zuchetta 1983;Regione Veneto 1985;Van Vleet et al 1987;Fossato et al 1988;Sherwin et al 1993;Sabil et al 1995;Argese et al 1997;Marcomini et al 1997;Aimo et al 1999;Baroni et al 1999;Ugolini et al 1999). The Venice City Canal studies used methods comparable to those used in the VL and PM studies.…”

Section: Venice Lagoon Regionmentioning

confidence: 99%

The sediments of the venice lagoon (Italy) evaluated in a screening risk assessment approach: Part II—lagoon sediment quality compared to hot spots, regional, and international case studies

Apitz¹,

Barbanti

Bocci³

et al. 2007

Integr Envir Assess & Manag

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The objective of this study was to carry out a critical comparison of data on the screening quality of surface sediments in Venice Lagoon (VL; main lagoon and its subbasins, Porto Marghera [PM], and Venice City Canals) and in other transitional and coastal ecosystems with various levels of human impact (urbanization and industrialization). To put VL in terms of reference and industrialized sites in the region, case studies were selected from the North Adriatic Region; to gain insight into how VL sediments compared to transitional areas throughout the world, case studies also were selected from a number of regions internationally. In order to compare regional levels of contamination, statistically processed sediment contaminant levels within a region (minimum, maximum, mean, and median), not individual sample values, are compared. The screening quality (relative to a variety of sediment quality guidelines) and the drivers of screening risk (based upon contaminant mixtures) of the VL sediments and other coastal and transitional sites are compared and discussed. The VL sediments have hazard quotients on the low end of the range typical of moderately urbanized and industrialized sites and higher than background conditions among the case studies reviewed. The Hg levels in the VL were generally higher than at other sites, and other contaminants were either equivalent or lower. Although sediments have somewhat higher levels of some contaminants and lower levels of other contaminants in PM and Venice City (VC) canals, levels for most contaminants are comparable to case studies with high levels of anthropogenic impact. For many contaminants of interest, PM (and for some, VC) sediments have some of the highest levels of any case study reviewed. How PM and VC rank when compared to other highly industrialized sites depends upon how data are synthesized and how ranges are taken into account. Actual risk must be evaluated using a weight-of-evidence approach, because natural background levels and site-specific bioavailability will differ both regionally and internationally.

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Section: Venice Lagoon Regionmentioning

confidence: 99%

The sediments of the venice lagoon (Italy) evaluated in a screening risk assessment approach: Part II—lagoon sediment quality compared to hot spots, regional, and international case studies

Apitz¹,

Barbanti

Bocci³

et al. 2007

Integr Envir Assess & Manag

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“…The objective of this study was to determine whether Cu‐contaminated sediments causes damage to the digestive system of deposit feeders by monitoring the variation of protease activities in gut fluids under increasing Cu concentrations. We targeted lugworm protease in this study because protease is one of the major extracellular enzymes in the digestive system of the lugworm, and amino acid‐based food items in sediments are important nutritional items for deposit feeders [6]. First we simulated the processes of Cu release from contaminated sediments by titration of Cu(NO 3 ) 2 solutions into a composite sample of gut fluid from multiple individuals.…”

Section: Introductionmentioning

confidence: 99%

Digestive proteases of the lugworm (Arenicola marina) inhibited by Cu from contaminated sediments

Chen

Mayer

1998

Enviro Toxic and Chemistry

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We examined potential toxic effects of copper released from contaminated sediments during deposit feeding of the lugworm, Arenicola marina. Titration of Cu solution into gut fluids can result in decreases in protease activity if sufficient Cu is added. The effects of Cu on gut proteases were confirmed by incubation of gut fluids with Cu‐contaminated harbor sediments. Monitoring of Cu titration into gut fluids shows that enzyme inhibition and quenching of gut protein fluorescence occur only when sufficient Cu has been added to allow inorganic Cu species to become abundant. This threshold level probably represents the exhaustion of strong binding sites that act as protection against enzyme inhibition. Thus, sediments contaminated with Cu may have inhibitory effects on digestive processes in lugworms.

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Qualifizierung und Quantifizierung der ersten Stufe der mikrobiologischen Selbstreinigung (extrazelluläre Enzymaktivität, EEA) in Gewässern und Indikation von Gewässerbelastungen und Okologischen Zuständen

Karrasch

2004

Handbuch Angewandte Limnologie: Grundlagen - Gewässerbelastung - Restaurierung - Aquatische Ökotoxikologie - Bewertung - Gewäss

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Immobilized Enzymes and Heavy Metals in Sediments of Venice Internal Canals

Cited by 5 publications

References 0 publications

The sediments of the venice lagoon (Italy) evaluated in a screening risk assessment approach: Part II—lagoon sediment quality compared to hot spots, regional, and international case studies

The sediments of the venice lagoon (Italy) evaluated in a screening risk assessment approach: Part II—lagoon sediment quality compared to hot spots, regional, and international case studies

Digestive proteases of the lugworm (Arenicola marina) inhibited by Cu from contaminated sediments

Qualifizierung und Quantifizierung der ersten Stufe der mikrobiologischen Selbstreinigung (extrazelluläre Enzymaktivität, EEA) in Gewässern und Indikation von Gewässerbelastungen und Okologischen Zuständen

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