Comparison of leaching characteristics of heavy metals from bottom and fly ashes in Korea and Japan

Journal Article · Fri Jul 01 04:00:00 EDT 2005 · Waste Management

DOI:https://doi.org/10.1016/j.wasman.2005.03.002· OSTI ID:20875657

Shim, Young-Sook ^[1]; Rhee, Seung-Whee ^[2]; Lee, Woo-Keun ^[3]

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1. Department of Environmental Engineering, Kangwon National University, Chuncheon, Kangwondo, 200-701, (Korea, Republic of)
2. Department of Environmental Engineering, Kyonggi University, Suwon 442-760 (Korea, Republic of)
3. Department of Environmental Engineering, Kangwon National University, Chuncheon, Kangwondo, Korea 200-701 (Korea, Republic of)

The objective of this research was to compare the leaching characteristics of heavy metals such as cadmium, chromium, copper, nickel, lead, etc., in Korean and Japanese municipal solid waste incineration (MSWI) ash. The rate of leaching of heavy metal was measured by KSLT and JTL-13, and the amount of heavy metals leached was compared with the metal content in each waste component. Finally, bio-availability testing was performed to assess the risks associated with heavy metals leached from bottom ash and fly ash. From the results, the value of neutralization ability in Japanese fly ash was four times higher than that in Korean fly ash. The reason was the difference in the content of Ca(OH){sub 2} in fly ash. The amount of lead leached exceeded the regulatory level in both Japanese and Korean fly ash. The rate of leaching was relatively low in ash with a pH in the range of 6-10. The bio-availability test in fly ash demonstrated that the amount of heavy metals leached was Pb > Cd > Cr, but the order was changed to Pb > Cr > Cd in the bottom ash. The leaching concentration of lead exceeded the Japanese risk level in all fly ashes from the two countries, but the leaching concentration of cadmium exceeded the regulatory level in Korean fly ash only.

• OSTI ID: 20875657
• Journal Information: Waste Management, Journal Name: Waste Management Journal Issue: 5 Vol. 25; ISSN WAMAE2; ISSN 0956-053X
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
BIOLOGICAL AVAILABILITY
CADMIUM
CALCIUM HYDROXIDES
CHROMIUM
COMBUSTION
COPPER
FLY ASH
HEAVY METALS
LEACHING
LEAD
NICKEL
SOLID WASTES