Metal leaching from sewage sludge ash

Journal Article · · BioCycle; (United States)

OSTI ID:6000980

Klei, H E; Sundstrom, D; Sweeney, C

Column elution and batch leaching tests, conducted on unquenched incinerator ash from a wastewater plant, recovered varying amounts of metals using water of pH 5.3 and 4.0. No cobalt, iron, or lead was recovered in the leachates. Water at pH 4.0, simulating acid rain, eluted 27% of the Cu, 79% of Cr, 40% Ca, 28% Mg, 25% Mn, 11% Ni, 20% K, and 21% Na after a single batch extraction. From 0 to 3.76% metals were leached during column elution tests using 6 bed volumes of liquid. Water of pH 5.3 recovered half to 75% of these amounts. If ash is extracted with water before sending it to the landfill, an appreciable fraction of the Ca and Cr may be recovered. 6 references, 4 figures, 3 tables.

• Research Organization: Connecticut Univ., Storrs
• OSTI ID: 6000980
• Journal Information: BioCycle; (United States), Journal Name: BioCycle; (United States) Vol. 22:3; ISSN BCYCD
• Country of Publication: United States
• Language: English

Related Subjects

520200* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ACID RAIN
ALKALI METALS
ALKALINE EARTH METALS
ASHES
ATMOSPHERIC PRECIPITATIONS
CALCIUM
CHROMIUM
COBALT
COPPER
DISSOLUTION
ELEMENTS
ENVIRONMENTAL EFFECTS
IRON
LEACHING
LEAD
MAGNESIUM
MANGANESE
METALS
NICKEL
POLLUTION SOURCES
POTASSIUM
RAIN
RESIDUES
SEPARATION PROCESSES
SEWAGE
SEWAGE SLUDGE
SIMULATION
SLUDGES
SODIUM
TRANSITION ELEMENTS
WASTES