Geochemistry and metals concentrations in marine sediments exposed to solidified/stabilized municipal solid waste incinerator ash

Geochemistry and metals concentrations in marine sediments exposed to solidified/stabilized municipal solid waste incinerator ash

Solidified and stabilized (S/S) municipal solid waste incinerator ash specimens were placed in tubes filled with organic-rich marine sediments and incubated in seawater for 48 months. Initially, the S/S ash and concrete control (CC) specimens increased the pH of the sediment/porewater system due to...

Full description

Saved in:
Bibliographic Details
Published in:Waste management (Elmsford) Vol. 15; no. 3; pp. 221 - 232
Main Authors: Kinner, N.E., Lyons, W.B., Rice, P.H., Durling, D.B., Gress, D.L.
Format: Journal Article
Language:English
Published: Oxford Elsevier Ltd 01-01-1995
New York, NY Elsevier Science
Subjects:
Applied sciences
Calcium
Diffusion
Exact sciences and technology
Geochemistry
Leaching
Magnesium
Metals
Pollution
Q1
Seawater
Sediments
Sulfur compounds
Urban and domestic wastes
Wastes
Waste management
Marine sediments
Incineration
Ash
Urban waste
Solid waste
Geochemistry
pH
Lixiviation
Metal
Sulfates
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Solidified and stabilized (S/S) municipal solid waste incinerator ash specimens were placed in tubes filled with organic-rich marine sediments and incubated in seawater for 48 months. Initially, the S/S ash and concrete control (CC) specimens increased the pH of the sediment/porewater system due to the leaching of hydroxide. After 10 months, their porewater pH values approached those in the sediment controls as magnesium and calcium precipitates accumulated on the surface of the specimens and limited diffusion of hydroxide. Sulfate was initially abiotically removed from the porewater of the concrete controls, most probably due to precipitation as CaSO 4 at high pH. Depletion of sulfate in the S/S ash sediments was due at least in part to microbial activity based on measured sulfate reduction rates. Cadmium, copper and lead, metals enriched in the ash relative to the sediments, were not found in higher concentrations in the test sediments relative to the controls (confidence level = 90%), suggesting that metals dissolution from the S/S ash was minimal.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ObjectType-Article-1
ObjectType-Feature-2
ISSN:0956-053X
1879-2456
DOI:10.1016/0956-053X(95)00020-Z