Influences of PH and Anions on Insolubility of Lead Ion by the Molten Slag
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Accession number;04A0015258
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| Title;Influences of PH and Anions on Insolubility of Lead Ion by the Molten Slag |
| Author;
FUJITA YUKIO
(Inst. Environmental Systems, Fac. Engineering, Kyushu Univ., JPN)
SHIMAOKA TAKAYUKI
(Inst. Environmental Systems, Fac. Engineering, Kyushu Univ., JPN)
KENMOKU SEIZO
(Tochigi Prefectural Ceramic Steering Office)
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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.6;PAGE.312-319(2003)
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| Figure&Table&Reference;FIG.8, TBL.4, REF.6 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;This paper explains the following items on the titled effects (I): 1) Background; it has already been clarified that basic lead carbonate (II) is formed by a precipitation reaction, which results in lead insolublization and thus reduces lead ion concentration by molten slag, 2) I were studied this time using slug leachate instead of molten slag, 3) pH was adjusted in the range from 9.2 to 11.4 by changing solid/liquid ratio of slag leachate and salts such as chloride, sulfate, acetate and nitrate were used considering the effects of ions thereof contained in incineration ash or organic substance, 4) optimal formation conditions of II found; the solid/liquid ratio of 2 w/v % and the pH of about 10.5, 5) effects of anions; Cl anion, with concentration of not lower than that of lead ion, predominantly formed laurionite, a kind of lead oxychloride, without forming II. SO4 anion formed lead sulfate with or without presence of Cl anion. Acetate and nitrate anions formed I and 6) conclusion; co-presence of salts is effective in reducing lead concentration. |
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