Journal of the Ceramic Society of Japan­A«

Technical report

111mPn00770080iB@@Cj§åµjss°ÛÄpDm³Q»gLøp
I{É²jEàì_àòHÆåwHwÂ«nC9218501 Îì§ÎìSìXs¬îªu 71Recycle of Incineration Ash of Urban Waste Using Foam Water Glass
Isao TSUYUMOTO and Hiroshi UCHIKAWA
Division of Environmental Engineering, Kanazawa Institute of Technology,
71, Ohgigaoka, Nonoichi­machi, Ishikawa­gun, Ishikawa 9218501

Incineration ash of urban waste was heat­treated at 900C with a foam water glass prepared from NaOH,
NaF and Si. The treatment was found to suppress elution of hazardous heavy metals from the ash and simul­
taneously to decrease the dioxins in the ash. The uorescence X­ray absorption ne structure (XAFS) meas­
urement indicated that a trace amount of Cr (VI) in the y ash transformed into a dierent valence upontreatment. Mortar specimens from the treated bottom ash showed satisfactory strengths and humidity­con­ditioning properties.
[Received April 25, 2002; Accepted November 6, 2002]
Key­words : Incineration ash, Waste, Water glass, Foam, Recycle, Mortar, Humidity conditioning

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B.E Û «±CC^Ìi40 mm~40 mm~10 mmjðp¢C20CC¼x50÷Å24 h ú¼³¼x90÷Å24 h z¼³¹½ãC20éyëÂ«îl1000 pgTEQ/g ð\ªÉºñÁÄ¢éD{¤Åp¢½­A« KXÉÂ¢ÄÍCTakeda çÉæèF°f»¨Ìfm{¬ð}§·éøÊªñ³êÄ¢é9)±Æ©çC_CILVÞá¸ÌJjYÉÂ¢ÄÍC¹Czú¼ÉæédÊÏ»ðj^[µ½DC. Êgl@C.A dà®no±#yr¼¥¨³ïÞªè±CÅ30 min M·é±ÆÉ­A« KXÆ¬µÄ900
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\SÉ¦·DOÉ4900 pgTEQ/g ¾Á½àÌªCÉæè28 pgTEQ/g ÆòôIÉá¸³ê½D±êÍàÉ¨¯Table 1. Content (÷) of the Fly Ash and the Bottom Ash beforeand after the Treatment

Table 2. Elution Test fot the Bottom Ash before and after theTreatment (mg/l)

Table 3. Elution Test for the Fly Ash before and after the Treat­ment (mg/l)

Table 4. Dioxin Content of the Fly Ash before and after theTreatment. Concentrations Below Quantitation Limit and Over De­
tection Limit are Shown in Parenthesis

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Journal of the Ceramic Society of Japan

111mPnB@@C0079

Table 5. Compressive and Bending Strengths of the MortarSpecimens at the Age of 28 dFig. 1. Near­edge spectra from Cr K­edge of (a) untreated yash, (b) treated y ash, (c) Cr(OH)3, (d) Cr2O3, (e) Na2CrO4, and(f) CrO3.

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C.B uõ XAFS ªèj Cr móÔªÍ}PÉtCAbV ÌOãyÑW¿ÌuõXAFS XyNgð¦·DCr ÜLÊªè³êÄ¢éW|ghZgÌzû[³Æärµ½Æ±ëCÄpDÌ Cr ÌZxÍñ 30 ppm Æ©Ïàçê½DW¿ÆÌär©ç 5992 eV tßÌs[NCyÑ 6030`6040 eV Ìu[hÈs[Nª 6 ¿Ì Cr ÉæéàÌÅ é10)DOÌXyNgÉÍ 6 ¿Ì Cr Éæés[Nªí¸©ÉÏ@³êÄ¢éªC
ãÉÍ±êçÌs[NªÁÅ·é±Æªí©Á½D±ÌÊÍCÉæè 6 ¿Ì Cr ª¼Ì¿ÉÏ»·é±Æð¦µÄ¨èC­A« KXãÍ 6 ¿Ì Cr ª¼Ì¿ÌóÔ
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Fig. 2. Behavior of water absorptin and desorption of mortar
specimens from incineration ashes. Mixing ratios of cement, sand,bottom ash, and y ash are F1F0F1F0, ¡F1F0F0.9F0.1C£F1F0.5F0.5F0C : 1F0.5F0.4F0.1C~F1F3F0F0.

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ÉW»ðp¢½Zg/×Þäª 1 ÌàÌÍCÊC^[bLOubNÌ­xîiJASS 7M101È°­x4.9 N/mm2C³k­x32 N/mm2 jðãñé±ÆªÅ«½D±Ìæ¤ÉZgCW»Ìzäð²®·é±ÆÉæè]Ì­xð­»Å«é±Æªª©Á½DXÉZgàÅ10÷ÌtCAbV ¨ðYÁµ½^àCtCAbV ¨ðYÁµÈ¢^ÆÙÚ¯¶³k­xCÈ°­xð­»·é±Æªª©Á½D±êÍC±êÜÅ§ªÉê¶µÄ¢½tCAbV ÌVµ¢LøpoHðJñ·éàÌÅ éD}QÉzú¼Á«Ì±Êð¦·D×ÞÆµÄ{gAbV ¨ð100÷gpµ½^ubNªÅàzú¼Á«ÉDêÄ¢é±Æªª©Á½D{gAbV Ìzª¸­·éÉÂêCzú¼Êà¸­µ½D±êÍ{gAbV ¨ª½E¿Åz «ðL·é±Æð½fµ½àÌÅéD{gAbV ¨ð×ÞÉp¢½^ubN
ÍÛ «ª¢±ÆªmFÅ«½D{¤ÅÍC­A«

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à®Ìno}§C_CILVÞÌá¸ªÅ«é±ÆªmFÅ«½D(2) uõ XAFS ªèÉæètCAbV Ì÷ÊNÌóÔªÍðsÁ½Æ±ëC­A« KXÉæè 6 ¿NÌÜLÊª¸­·é±Æð©¢¾µ½D(3) {gAbV yÑtCAbV Ì­A« KX¨ð»ê¼êÞC¬aÞÆµÄ^ubNðì»µ½Æ±ëCzäð²®·é±ÆÉæèC^[bLOubNÆµÄgpÂ\È­xð­»·é±Æªª©Á½D(4) {gAbV yÑtCAbV ¨ð»ê¼êÞC¬aÞÆµÄp¢½^ubNÍÊíÌ^æèàÛ¼«ÉDêÄ¢é±ÆªmFÅ«½DÓ« uõ XAFS ªèÉÖµÄÍàc@lPxõÈw¤Z^[ÌJc £mCF¯êüÆmÉ¦ÍðèÜµ½D¿²»ÉÂ¢ÄÍsåwåw@Hwn¤ÈEª¹P
Éw±ðèÜµ½DÜ½C¿ÌêÍ®ïÐgXgCtÌöè Éñ¸«Üµ½D±±ÉLµÄÓÓð\µÜ·DReferences
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