Metal distribution characteristics in a laboratory waste incinerator

Chih Ping Chang, Yun Hwei Shen, I. Cheng Chou, Ya Fen Wang, Yi Ming Kuo, Juu En Chang

研究成果: Article

8 引文 (Scopus)

摘要

The metal distribution in the emissions of a laboratory waste incinerator (LWI) was investigated. The input materials and output materials (fly ash, bottom ash, and flue gas) were analyzed to examine the transportation and transmission behavior of heavy metals. Toxic (As, Cd, Cr, Hg, Ni, and Pb), anthropogenic (Ag, Ba, Cu, Mn, Se, and Zn) and crust (Na) elements were adopted to characterize the distribution properties of the LWI under investigation. The results indicated that Ba, Cr and Hg (80.0, 13.0 and 12.9 mg/L, respectively) were the major metals in the organic liquid waste input, and Na, and Zn (7497 and 349 mg/kg, respectively) were the major ones for medical solid waste. The Na content in the fly ash could be as high as 911574 mg/kg, and this was found to be the major Na emission source according to the emission factors. The mass of Na may be supplied using a NaOH solution injection to neutralize the acidic combustion gas, and it was found that high contents of Na in the flue gas were from the sprinkled NaOH solution. For the output materials, NaCl was found to be the major crystalline form of Na in the ash, based on the results of X-ray diffraction (XRD) patterns. The crust (Na) element was the major element in the bottom and fly ash. The toxic (As, Cr, Ni, and Pb) and anthropogenic (Se) elements were mainly distributed in the second cooling tower ash and baghouse ash in a range of 64.5%-91.9%. The average concentrations of Pb, Cd, and Hg concentrations in the flue gas were all under Taiwan's EPA regulation standards. Toxicity characteristic leaching procedure (TCLP) data showed that the leachability of As, Cr, Cu, Hg, and Se exceeded the EPA's regulations. It is thus suggested that the ash should be treated by further elutriation or vitrification processes to reduce the TCLP levels in the final products.

原文English
頁(從 - 到)422-430
頁數9
期刊Aerosol and Air Quality Research
12
發行號3
DOIs
出版狀態Published - 2012 六月 1

指紋

Ashes
Coal Ash
Refuse incinerators
ash
Metals
fly ash
bottom ash
Fly ash
Flue gases
metal
Poisons
leaching
Leaching
Toxicity
crust
toxicity
vitrification
Vitrification
Cooling towers
solid waste

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Pollution

引用此文

Chang, Chih Ping ; Shen, Yun Hwei ; Chou, I. Cheng ; Wang, Ya Fen ; Kuo, Yi Ming ; Chang, Juu En. / Metal distribution characteristics in a laboratory waste incinerator. 於: Aerosol and Air Quality Research. 2012 ; 卷 12, 編號 3. 頁 422-430.
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abstract = "The metal distribution in the emissions of a laboratory waste incinerator (LWI) was investigated. The input materials and output materials (fly ash, bottom ash, and flue gas) were analyzed to examine the transportation and transmission behavior of heavy metals. Toxic (As, Cd, Cr, Hg, Ni, and Pb), anthropogenic (Ag, Ba, Cu, Mn, Se, and Zn) and crust (Na) elements were adopted to characterize the distribution properties of the LWI under investigation. The results indicated that Ba, Cr and Hg (80.0, 13.0 and 12.9 mg/L, respectively) were the major metals in the organic liquid waste input, and Na, and Zn (7497 and 349 mg/kg, respectively) were the major ones for medical solid waste. The Na content in the fly ash could be as high as 911574 mg/kg, and this was found to be the major Na emission source according to the emission factors. The mass of Na may be supplied using a NaOH solution injection to neutralize the acidic combustion gas, and it was found that high contents of Na in the flue gas were from the sprinkled NaOH solution. For the output materials, NaCl was found to be the major crystalline form of Na in the ash, based on the results of X-ray diffraction (XRD) patterns. The crust (Na) element was the major element in the bottom and fly ash. The toxic (As, Cr, Ni, and Pb) and anthropogenic (Se) elements were mainly distributed in the second cooling tower ash and baghouse ash in a range of 64.5{\%}-91.9{\%}. The average concentrations of Pb, Cd, and Hg concentrations in the flue gas were all under Taiwan's EPA regulation standards. Toxicity characteristic leaching procedure (TCLP) data showed that the leachability of As, Cr, Cu, Hg, and Se exceeded the EPA's regulations. It is thus suggested that the ash should be treated by further elutriation or vitrification processes to reduce the TCLP levels in the final products.",
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Metal distribution characteristics in a laboratory waste incinerator. / Chang, Chih Ping; Shen, Yun Hwei; Chou, I. Cheng; Wang, Ya Fen; Kuo, Yi Ming; Chang, Juu En.

於: Aerosol and Air Quality Research, 卷 12, 編號 3, 01.06.2012, p. 422-430.

研究成果: Article

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AU - Chang, Chih Ping

AU - Shen, Yun Hwei

AU - Chou, I. Cheng

AU - Wang, Ya Fen

AU - Kuo, Yi Ming

AU - Chang, Juu En

PY - 2012/6/1

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