Leaching study of toxic trace elements from flyash in batch and column experiment

Journal Article · Wed Jan 01 04:00:00 EST 1992 · Journal of Environmental Science and Health, Part A: Environmental Science and Engineering; (United States)

DOI:https://doi.org/10.1080/10934529209375755· OSTI ID:6906405

Wasay, S A ^[1]

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1. Indian Institute of Technology, New Delhi (India)

Leaching of trace elements such as Cr, Fe, Ni, Cu, Zn, Pb, Sb, As and Se generated from flyash of coal based thermal power plant was studied in a batch and column experiments at pH 6.0 with detention time of 20 hrs. and flow rate of 10 ml/hr respectively. The leaching was carried out at various poring volume of distilled water at pH 5.0. It was found that the metals in the leachate decreases as the number of pore increases. The concentration of these metals in flyash were determined after extracting with water at pH 6.0 in a batch experiment at different interval of shaking time. Average percentage of leachatable toxic metals was found to be 44.7% and 35.0% for batch and column study. Leaching of iron is almost negligible. The leaching behaviour of these metals described in terms of specific mass transfer function F(t), which gives the net release rate of metals. The metals were analyzed by the atomic absorption spectrophotometer. 4 refs., 3 figs., 1 tab.

• OSTI ID: 6906405
• Journal Information: Journal of Environmental Science and Health, Part A: Environmental Science and Engineering; (United States), Journal Name: Journal of Environmental Science and Health, Part A: Environmental Science and Engineering; (United States) Vol. 27:3; ISSN 0360-1226; ISSN JESEDU
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010900* -- Coal
Lignite
& Peat-- Environmental Aspects
54 ENVIRONMENTAL SCIENCES
540220 -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
AEROSOL WASTES
AQUATIC ECOSYSTEMS
ARSENIC
ASHES
ASIA
CARBONACEOUS MATERIALS
CHROMIUM
COAL
COMBUSTION PRODUCTS
COPPER
DEVELOPING COUNTRIES
DISSOLUTION
ECOLOGICAL CONCENTRATION
ECOSYSTEMS
ELEMENTS
ENERGY SOURCES
ENVIRONMENTAL EFFECTS
FLY ASH
FOSSIL FUELS
FOSSIL-FUEL POWER PLANTS
FUELS
HAZARDOUS MATERIALS
INDIA
IRON
LEACHING
LEAD
MATERIALS
METALS
NICKEL
POWER PLANTS
RESIDUES
SEMIMETALS
SEPARATION PROCESSES
THERMAL POWER PLANTS
TOXIC MATERIALS
TRANSITION ELEMENTS
WASTES
ZINC