Simultaneous Treatment of Heavy Metals and Salts in Fly Ash by Scrubbing Using Chelating Agent Solution
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Accession number;03A0753028
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| Title;Simultaneous Treatment of Heavy Metals and Salts in Fly Ash by Scrubbing Using Chelating Agent Solution |
| Author;
IMAOKA TSUTOMU
(Hiroshima Inst. Technol., Faculty of Environmental Studies, JPN)
YAMAGA MICHIHIRO
(Hiroshima Univ., Graduate School of Engineering, JPN)
NISHIJIMA WATARU
(Hiroshima Univ., Graduate School of Engineering, JPN)
OKADA MITSUMASA
(Hiroshima Univ., Graduate School of Engineering, JPN)
INOUE YUZO
(National Inst. Environmental Studies, JPN)
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Journal Title;Journal of the Japan Society of Waste Management Experts
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Journal Code:L1596A
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ISSN:
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VOL.14;NO.5;PAGE.288-295(2003)
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| Figure&Table&Reference;FIG.6, TBL.2, REF.21 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;This paper explains the following items on the titled technology: 1) Objectives; insolubilization of heavy metals and removal of inorganic salts at the same time, 2) result on Pb and Zn in dry fly ash (no chelate treated); the addition and stirring of 10 % of a chelating agent using ten times volume distilled water based on fly ash weight could insolubilize them in 100 % and 90 %, respectively, although leaving a problem of high amount of the addition needed, 3) result on Na, K and Cl; they were completely leached out into twice volume of supernatant chelating agent solution but about 20 times volume were required to achieve not less than 80 % of removal efficiency, 4) result on Ca and SO4 in fly ash; their elution depended linearly on volume of a chelating agent solution and not sufficient even by 100 times volume, because of low solubility of CaSO4 and 5) reduction benefit of landfill fly ash, equivalent to 37 %, was found by salts scrubbing using 20 times volume of a chelating agent solution. |
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