Reducing volatilization of heavy metals in phosphate-pretreated municipal solid waste incineration fly ash by forming pyromorphite-like minerals

Journal Article · Tue Feb 15 04:00:00 EST 2011 · Waste Management

OSTI ID:21550340

Ying, Sun; Jianchang, Zheng ^[1]; Luquan, Zou ^[2]; Qiang, Liu; Ping, Zhu ^[1]

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1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444 (China)
2. Shanghai Center of Solid Waste Disposal, Shanghai (China)

This research investigated the feasibility of reducing volatilization of heavy metals (lead, zinc and cadmium) in municipal solid waste incineration (MSWI) fly ash by forming pyromorphite-like minerals via phosphate pre-treatment. To evaluate the evaporation characteristics of three heavy metals from phosphate-pretreated MSWI fly ash, volatilization tests have been performed by means of a dedicated apparatus in the 100-1000 deg. C range. The toxicity characteristic leaching procedure (TCLP) test and BCR sequential extraction procedure were applied to assess phosphate stabilization process. The results showed that the volatilization behavior in phosphate-pretreated MSWI fly ash could be reduced effectively. Pyromorphite-like minerals formed in phosphate-pretreated MSWI fly ash were mainly responsible for the volatilization reduction of heavy metals in MSWI fly ash at higher temperature, due to their chemical fixation and thermal stabilization for heavy metals. The stabilization effects were encouraging for the potential reuse of MSWI fly ash.

• OSTI ID: 21550340
• Journal Information: Waste Management, Journal Name: Waste Management Journal Issue: 2 Vol. 31; ISSN WAMAE2; ISSN 0956-053X
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
54 ENVIRONMENTAL SCIENCES
AEROSOL WASTES
ASHES
CADMIUM
CHEMICAL REACTIONS
COMBUSTION
COMBUSTION PRODUCTS
DISSOLUTION
ELEMENTS
EVAPORATION
EXTRACTION
FLY ASH
HEAVY METALS
LEACHING
LEAD
METALS
MINERALS
OXIDATION
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHOSPHATES
PHOSPHORUS COMPOUNDS
RESIDUES
SEPARATION PROCESSES
SOLID WASTES
STABILIZATION
THERMOCHEMICAL PROCESSES
TOXICITY
WASTES
ZINC