Anaerobic sediment potential acidification and metal release risk assessment by chemical characterization and batch resuspension experiments

Autor:	María Pía Di Nanno, Gustavo Curutchet, Silvia Ratto
Rok vydání:	2007
Předmět:	Pollutant geography geography.geographical_feature_category Chemistry Stratigraphy Microorganism Sediment Redox Sink (geography) Metal Dredging Mining engineering visual_art Environmental chemistry visual_art.visual_art_medium Anaerobic exercise Earth-Surface Processes
Zdroj:	Journal of Soils and Sediments. 7:187-194
ISSN:	1614-7480 1439-0108
DOI:	10.1065/jss2007.04.220
Popis:	Background, Aim and Scope Sediments act as a sink for toxic substances (heavy metals, organic pollutants) and, consequently, dredged materials often contain pollutants which are above safe limits. In polluted anaerobic sediments, the presence of sulphides and redox potential changes creates a favorable condition for sulphide oxidation to sulphate, resulting in potential toxic metal release. The oxidation reaction is catalyzed by several microorganisms. Some clean up measures, such as dredging, can initiate the process. The aim of the present work is to assess the acidification and metal release risk in the event of sediment dredging and also to compare two different acid base account techniques with the resuspension results. The oxidation mechanism by means of inoculation with an Acidithiobacillus ferrooxidans strain was also evaluated.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1930448cd256308f5e5ee7c811474952 https://doi.org/10.1065/jss2007.04.220 Zobrazit plný text záznamu Full text from SpringerLink