« Previous Abstract"First gender, then attractiveness: Indications of gender-specific attractiveness processing via ERP onsets"    Next AbstractAdvances in functional research of antioxidants and organoleptic traits in berry crops »

Environ Toxicol Chem

Title:		Experimental and modeling investigation of metal release from metal-spiked sediments
Author(s):		Carbonaro RF; Mahony JD; Walter AD; Halper EB; Di Toro DM;
Address:		"Department of Civil and Environmental Engineering, Manhattan College, Riverdale, New York 10471, USA. richard.carbonaro@manhattan.edu"
Journal Title:		Environ Toxicol Chem
Year:		2005
Volume:		24
Issue:		12
Page Number:		3007 - 3019
DOI:		10.1897/05-011r.1
ISSN/ISBN:		0730-7268 (Print) 0730-7268 (Linking)
Abstract:		"In sediments that contain iron monosulfide, cadmium, nickel, lead, zinc, and silver(I) form insoluble metal sulfides that lower the metal ion activity in the sediment-pore water system, thereby reducing toxicity. However, metal sulfides are susceptible to oxidation by molecular oxygen resulting in metal solubilization. To better understand the sources and sinks of metal sulfides in sediments, iron monsulfide-rich freshwater sediments were spiked with cadmium, nickel, lead, zinc, or silver(I) and placed into cylindrical cores with an overlying layer of oxygen-saturated water. Measurements of the dissolved metal concentration in the overlying water were made as a function of time and the vertical profiles of acid-volatile sulfide (AVS) and simultaneously extracted metal (SEM) were measured after 150 d. A one-dimensional reactive and transport model has been employed to help elucidate processes controlling the fate of metals in sediments. The model incorporates metal-sulfide formation, metal-sulfide oxidation, and metal partitioning onto sediment organic carbon and iron oxyhydroxide to simulate the vertical transport of metals throughout the sediment core"
Keywords:		"Acids/chemistry Carbon/chemistry Environmental Monitoring Ferric Compounds/chemistry Geologic Sediments/*chemistry Metals/chemistry/*metabolism Models, Chemical Organic Chemicals/chemistry Oxidation-Reduction Sulfides/*chemistry Time Factors Volatilizatio;"
Notes:		"MedlineCarbonaro, Richard F Mahony, John D Walter, Alison D Halper, Eve B Di Toro, Dominic M eng P4ES10344/ES/NIEHS NIH HHS/ Research Support, N.I.H., Extramural 2006/02/01 Environ Toxicol Chem. 2005 Dec; 24(12):3007-19. doi: 10.1897/05-011r.1"