Heavy metals behaviour during resuspension of the contaminated anoxic sludge of the venice canals

Autor:	Roberto Zonta, Luca Zaggia, Alessandra Arizzi Novelli, F. Collavini
Rok vydání:	2000
Předmět:	Pollutant Health Toxicology and Mutagenesis Particulates Pollution Anoxic waters law.invention Dilution Adsorption Nutrient Water column law Environmental chemistry Environmental Chemistry Environmental science Filtration
Zdroj:	Toxicological & Environmental Chemistry. 77:171-187
ISSN:	1029-0486 0277-2248
Popis:	A field study on the water column in a canal of Venice was perfomed to investigate heavy metals behaviour during dredging interventions on the contaminated anoxic sludge. Concentrations in the dissolved and particulate phases were analysed following a specifically designed filtration scheme. The variations of physico‐chemical parameters, monitored during the sampling, allowed the comparison between the trend of the variables characterising sludge resuspension and pollutant concentrations in the water column. Dissolved nutrient species and hydrogen sulphide were also analysed. Due to the presence of a large amount of reducing species, the sludge resuspension induces rapid variations in the oxidation‐reduction conditions in the overlying water. In response to these changes, two distinct behaviours were observed for dissolved species. Some elements such as Zn, Cu, Pb and As are scavenged by resuspended amorphous sulphides, while others (Mn and Ni) undergo a mobilisation by dilution of pore‐water concentrations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::708f5c81794a4af9108e499db56cb351 https://doi.org/10.1080/02772240009358948 Zobrazit plný text záznamu