JP3591552B2 - Solid waste treatment method - Google Patents
Solid waste treatment method Download PDFInfo
- Publication number
- JP3591552B2 JP3591552B2 JP04666396A JP4666396A JP3591552B2 JP 3591552 B2 JP3591552 B2 JP 3591552B2 JP 04666396 A JP04666396 A JP 04666396A JP 4666396 A JP4666396 A JP 4666396A JP 3591552 B2 JP3591552 B2 JP 3591552B2
- Authority
- JP
- Japan
- Prior art keywords
- solid waste
- metal
- alcohol
- sodium
- treatment agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000009270 solid waste treatment Methods 0.000 title claims 2
- 229910052751 metal Inorganic materials 0.000 claims description 46
- 239000002184 metal Substances 0.000 claims description 45
- 239000003795 chemical substances by application Substances 0.000 claims description 43
- 239000002910 solid waste Substances 0.000 claims description 41
- 238000000034 method Methods 0.000 claims description 12
- 125000004432 carbon atom Chemical group C* 0.000 claims description 10
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims description 9
- 150000002739 metals Chemical class 0.000 claims description 6
- 150000005846 sugar alcohols Polymers 0.000 claims description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 4
- 229910052783 alkali metal Inorganic materials 0.000 claims description 4
- 150000001340 alkali metals Chemical class 0.000 claims description 4
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 4
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 4
- 125000003158 alcohol group Chemical group 0.000 claims description 3
- 230000003100 immobilizing effect Effects 0.000 claims description 3
- 229910052979 sodium sulfide Inorganic materials 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- 235000019441 ethanol Nutrition 0.000 description 19
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 13
- 239000002689 soil Substances 0.000 description 10
- 239000000126 substance Substances 0.000 description 10
- 230000002378 acidificating effect Effects 0.000 description 9
- 239000002893 slag Substances 0.000 description 9
- 239000010802 sludge Substances 0.000 description 9
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 8
- 239000000428 dust Substances 0.000 description 8
- 229910052708 sodium Inorganic materials 0.000 description 8
- 239000011734 sodium Substances 0.000 description 8
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 6
- 229910052793 cadmium Inorganic materials 0.000 description 6
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 6
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- CYQAYERJWZKYML-UHFFFAOYSA-N phosphorus pentasulfide Chemical compound S1P(S2)(=S)SP3(=S)SP1(=S)SP2(=S)S3 CYQAYERJWZKYML-UHFFFAOYSA-N 0.000 description 6
- -1 rivers Substances 0.000 description 6
- 229910052725 zinc Inorganic materials 0.000 description 6
- 239000011701 zinc Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 4
- 150000001298 alcohols Chemical class 0.000 description 4
- 239000002956 ash Substances 0.000 description 4
- 238000001479 atomic absorption spectroscopy Methods 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000010828 elution Methods 0.000 description 4
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 4
- 229910052753 mercury Inorganic materials 0.000 description 4
- 239000010813 municipal solid waste Substances 0.000 description 4
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 3
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 238000007922 dissolution test Methods 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- XPFVYQJUAUNWIW-UHFFFAOYSA-N furfuryl alcohol Chemical compound OCC1=CC=CO1 XPFVYQJUAUNWIW-UHFFFAOYSA-N 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- HYHCSLBZRBJJCH-UHFFFAOYSA-M sodium hydrosulfide Chemical compound [Na+].[SH-] HYHCSLBZRBJJCH-UHFFFAOYSA-M 0.000 description 3
- OOCCDEMITAIZTP-QPJJXVBHSA-N (E)-cinnamyl alcohol Chemical compound OC\C=C\C1=CC=CC=C1 OOCCDEMITAIZTP-QPJJXVBHSA-N 0.000 description 2
- DNIAPMSPPWPWGF-GSVOUGTGSA-N (R)-(-)-Propylene glycol Chemical compound C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 125000001931 aliphatic group Chemical group 0.000 description 2
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 2
- 229910001860 alkaline earth metal hydroxide Inorganic materials 0.000 description 2
- XXROGKLTLUQVRX-UHFFFAOYSA-N allyl alcohol Chemical compound OCC=C XXROGKLTLUQVRX-UHFFFAOYSA-N 0.000 description 2
- 239000003125 aqueous solvent Substances 0.000 description 2
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 2
- DKVNPHBNOWQYFE-UHFFFAOYSA-N carbamodithioic acid Chemical compound NC(S)=S DKVNPHBNOWQYFE-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- MWKFXSUHUHTGQN-UHFFFAOYSA-N decan-1-ol Chemical compound CCCCCCCCCCO MWKFXSUHUHTGQN-UHFFFAOYSA-N 0.000 description 2
- NOPFSRXAKWQILS-UHFFFAOYSA-N docosan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCCCCCO NOPFSRXAKWQILS-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- BXWNKGSJHAJOGX-UHFFFAOYSA-N hexadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCO BXWNKGSJHAJOGX-UHFFFAOYSA-N 0.000 description 2
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- ZXEKIIBDNHEJCQ-UHFFFAOYSA-N isobutanol Chemical compound CC(C)CO ZXEKIIBDNHEJCQ-UHFFFAOYSA-N 0.000 description 2
- 239000011133 lead Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- ZWRUINPWMLAQRD-UHFFFAOYSA-N nonan-1-ol Chemical compound CCCCCCCCCO ZWRUINPWMLAQRD-UHFFFAOYSA-N 0.000 description 2
- GLDOVTGHNKAZLK-UHFFFAOYSA-N octadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCO GLDOVTGHNKAZLK-UHFFFAOYSA-N 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- HLZKNKRTKFSKGZ-UHFFFAOYSA-N tetradecan-1-ol Chemical compound CCCCCCCCCCCCCCO HLZKNKRTKFSKGZ-UHFFFAOYSA-N 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- DNIAPMSPPWPWGF-VKHMYHEASA-N (+)-propylene glycol Chemical compound C[C@H](O)CO DNIAPMSPPWPWGF-VKHMYHEASA-N 0.000 description 1
- JNYAEWCLZODPBN-KVTDHHQDSA-N (2r,3r,4r)-2-[(1r)-1,2-dihydroxyethyl]oxolane-3,4-diol Chemical compound OC[C@@H](O)[C@H]1OC[C@@H](O)[C@H]1O JNYAEWCLZODPBN-KVTDHHQDSA-N 0.000 description 1
- JNYAEWCLZODPBN-JGWLITMVSA-N (2r,3r,4s)-2-[(1r)-1,2-dihydroxyethyl]oxolane-3,4-diol Chemical compound OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O JNYAEWCLZODPBN-JGWLITMVSA-N 0.000 description 1
- YPFDHNVEDLHUCE-UHFFFAOYSA-N 1,3-propanediol Substances OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 1
- KBPLFHHGFOOTCA-UHFFFAOYSA-N 1-Octanol Chemical compound CCCCCCCCO KBPLFHHGFOOTCA-UHFFFAOYSA-N 0.000 description 1
- GSFSVEDCYBDIGW-UHFFFAOYSA-N 2-(1,3-benzothiazol-2-yl)-6-chlorophenol Chemical compound OC1=C(Cl)C=CC=C1C1=NC2=CC=CC=C2S1 GSFSVEDCYBDIGW-UHFFFAOYSA-N 0.000 description 1
- WCASXYBKJHWFMY-NSCUHMNNSA-N 2-Buten-1-ol Chemical compound C\C=C\CO WCASXYBKJHWFMY-NSCUHMNNSA-N 0.000 description 1
- OLPXIHXXKBDZES-UHFFFAOYSA-L 37488-76-9 Chemical compound [Na+].[Na+].[S-]S[S-] OLPXIHXXKBDZES-UHFFFAOYSA-L 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 description 1
- 241000360590 Erythrites Species 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- 241000132519 Galactites Species 0.000 description 1
- AMQJEAYHLZJPGS-UHFFFAOYSA-N N-Pentanol Chemical compound CCCCCO AMQJEAYHLZJPGS-UHFFFAOYSA-N 0.000 description 1
- WMEKSYHDIDMJMC-UHFFFAOYSA-L [Na+].[Na+].[S-]SSS[S-] Chemical compound [Na+].[Na+].[S-]SSS[S-] WMEKSYHDIDMJMC-UHFFFAOYSA-L 0.000 description 1
- 150000001346 alkyl aryl ethers Chemical class 0.000 description 1
- OOCCDEMITAIZTP-UHFFFAOYSA-N allylic benzylic alcohol Natural products OCC=CC1=CC=CC=C1 OOCCDEMITAIZTP-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 235000019445 benzyl alcohol Nutrition 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- QGJOPFRUJISHPQ-NJFSPNSNSA-N carbon disulfide-14c Chemical compound S=[14C]=S QGJOPFRUJISHPQ-NJFSPNSNSA-N 0.000 description 1
- 229960000541 cetyl alcohol Drugs 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- XCIXKGXIYUWCLL-UHFFFAOYSA-N cyclopentanol Chemical compound OC1CCCC1 XCIXKGXIYUWCLL-UHFFFAOYSA-N 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- ZLCCLBKPLLUIJC-UHFFFAOYSA-L disodium tetrasulfane-1,4-diide Chemical compound [Na+].[Na+].[S-]SS[S-] ZLCCLBKPLLUIJC-UHFFFAOYSA-L 0.000 description 1
- 229960000735 docosanol Drugs 0.000 description 1
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 1
- UNXHWFMMPAWVPI-ZXZARUISSA-N erythritol Chemical compound OC[C@H](O)[C@H](O)CO UNXHWFMMPAWVPI-ZXZARUISSA-N 0.000 description 1
- WCASXYBKJHWFMY-UHFFFAOYSA-N gamma-methylallyl alcohol Natural products CC=CCO WCASXYBKJHWFMY-UHFFFAOYSA-N 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229940035429 isobutyl alcohol Drugs 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- DNIAPMSPPWPWGF-UHFFFAOYSA-N monopropylene glycol Natural products CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 1
- 229940043348 myristyl alcohol Drugs 0.000 description 1
- GOQYKNQRPGWPLP-UHFFFAOYSA-N n-heptadecyl alcohol Natural products CCCCCCCCCCCCCCCCCO GOQYKNQRPGWPLP-UHFFFAOYSA-N 0.000 description 1
- 229920000166 polytrimethylene carbonate Polymers 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- TVDSBUOJIPERQY-UHFFFAOYSA-N prop-2-yn-1-ol Chemical compound OCC#C TVDSBUOJIPERQY-UHFFFAOYSA-N 0.000 description 1
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- 229920006395 saturated elastomer Polymers 0.000 description 1
- SRRKNRDXURUMPP-UHFFFAOYSA-N sodium disulfide Chemical compound [Na+].[Na+].[S-][S-] SRRKNRDXURUMPP-UHFFFAOYSA-N 0.000 description 1
- 229940012831 stearyl alcohol Drugs 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- HEBKCHPVOIAQTA-SCDXWVJYSA-N xylitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)CO HEBKCHPVOIAQTA-SCDXWVJYSA-N 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、焼却灰、煤塵、鉱滓、汚泥、土壌等の固体状廃棄物中に存在する金属を固定化し、これらの固体状廃棄物中からの溶出を防止できる、固体状廃棄物の処理方法に関する。
【０００２】
【従来の技術】
ゴミ焼却場等で生じる焼却灰や煤塵、鉱山から排出される鉱滓、廃水処理の際に用いられる活性汚泥、汚染された土壌等の固体状廃棄物中には種々の金属元素が含有されており、水銀、カドミウム、鉛、亜鉛、銅、クロム等の人体に有害な重金属元素が多量に含有されている場合も多い。これら固体状廃棄物から金属が溶出すると、地下水、河川、海水等が汚染される虞れがある。
【０００３】
このため、従来固体状廃棄物をセメントで固めた後、埋め立てて処理する方法が採られていたが、海水や雨水と接触した際にセメント壁を通して海水中や土中に金属が溶出する虞れがあり、この方法は必ずしも安全な処理方法とは言えなかった。このような問題を解決するため、本出願人はジチオ酸基やその塩を官能基として有する金属捕集剤を固体状廃棄物に添加し、金属捕集剤によって固体状廃棄物中の金属を固定化する方法を種々提案している（例えば、特開昭６４−９００８３号、特開平１−９９６７９号、特開平４−２６７９８２号等）。
【０００４】
【発明が解決しようとする課題】
しかしながら上記従来の方法で用いる金属捕集剤は、酸性下での金属捕集能に乏しく、固体状廃棄物中に酸性物質が含有されていると固体状廃棄物中の金属を確実に固定できなくなるという問題がある。例えばゴミ焼却場において発生する飛灰はゴミの焼却残留物であるから、飛灰中には種々の物質が含有されており、近年のゴミの多種類化に伴って飛灰中に多量の酸性物質が含有される場合もあり、特に溶融炉の飛灰には酸性物質が多量に含有される虞れがある。また鉱滓や汚泥、汚染された土壌等の中にも酸性物質を含有するものが多く存在する。このような酸性物質を含有する固体状廃棄物にジチオ酸基やその塩を官能基として有する金属捕集剤を添加すると、固体状廃棄物中の金属の固定化が不充分となって固体状廃棄物中からの金属溶出による汚染の虞れとともに、硫化水素ガスが発生するという危険があった。
【０００５】
本発明は上記課題を解決するためになされたもので、酸性物質を多量に含有する固体状廃棄物であっても、該廃棄物中の金属を確実に固定化でき、しかも硫化水素ガスが発生する虞れもない固体状廃棄物の処理方法を提供することを目的とするものである。
【０００６】
【課題を解決するための手段】
即ち本発明の固体状廃棄物の処理方法は、下記（１）式、（２）式、（３）式で示す金属捕集剤の１種又は２種以上を固体状廃棄物に添加し、固体状廃棄物中の金属を固定化することを特徴とする。
【０００７】
【化４】
【化５】
【化６】
【００１０】
本発明の方法において、固体状廃棄物に上記固体状金属捕集剤とともに硫化ナトリウム類を併用して添加することができる。
【００１１】
【発明の実施の形態】
本発明において用いる上記（１）式、（２）式で示す化合物において、ＲＯは炭素数１〜２８のアルコール残基を示し、（１）式、（２）式で示す化合物は、例えばアルコールと五硫化二リンとを反応させることにより得られる。このアルコールとしては１価アルコールや多価アルコールが挙げられ、１価アルコールの場合には炭素数１〜２８のものが、多価アルコールの場合には炭素数２〜２８のものが用いられる。（１）式の化合物は、二硫化炭素、四塩化炭素、アルコール等の非水溶媒の存在したにアルコール１モル当たりに対し、五硫化二リンを０．０５〜２．０モルの割合で反応させることにより得られる。（１）式の化合物において、２つのＲＯは同一のアルコールの残基であっても、異なるアルコールの残基であっても良い。
【００１２】
また、上記（２）式の化合物は、非水溶媒の存在下でアルコール１モル当たり、五硫化二リンを０．０５〜１．０モル反応させることにより得られる。一方、上記（３）式の化合物は、炭素数２〜２８の多価アルコール１モル当たり、五硫化二リン０．０５〜２．０モルを反応させることによって得られる。
【００１３】
上記炭素数１〜２８の１価アルコールとしては、例えばメチルアルコール、エチルアルコール、プロピルアルコール、イソプロピルアルコール、ブチルアルコール、イソブチルアルコール、アミルアルコール、ヘキシルアルコール、オクチルアルコール、ノニルアルコール、デシルアルコール、ラウリルアルコール、ミリスチルアルコール、セチルアルコール、ステアリルアルコール、ベヘニルアルコール、メリシルアルコール等の脂肪族飽和アルコール、アリルアルコール、クロチルアルコール、プロパルギルアルコール等の脂肪族不飽和アルコール、シクロペンタノール、シクロヘキサノール等の脂環式アルコール、ベンジルアルコール、シンナミルアルコール等の芳香族アルコール、フルフリルアルコール等の複素環式アルコール等が挙げられる。
【００１４】
また炭素数２〜２８の多価アルコールとしては、例えばエチレングリコール、１，２−プロパンジオール、１，３−プロパンジオール、１，４−ブタンジオール、１，６−ヘキサンジオール、１，５−ペンタンジオール、、ジエチレングリコール、トリエチレングリコール、ジエチレングリコールモノアルキルエーテル、ポリエチレングリコールモノアルキルエーテル、ポリエチレングリコール、グリセリン、ペンタグリセリン、ソルビタン、マンニタン、トレイット、エリトリット、ペンタエリトリット、アラビット、リビット、キシリット、ラムニット、ソルビット、マンニット、イジット、タリット、ガラクチット、アリット、アルトリット等が挙げられる。
【００１５】
上記（１）式、（２）式、（３）式において、Ｘは水素、アルカリ金属、アルカリ土類金属、アンモニウムであり、Ｘがアルカリ金属、アルカリ土類金属、アンモニウムである化合物は、アルコールと五硫化二リンとを反応させる際に、アルカリ金属水酸化物、アルカリ土類金属水酸化物、アンモニア等のアルカリを存在させるか、反応終了後にこれらのアルカリで処理することにより得られる（アルコールと五硫化二リンとをアルカリの非存在下で反応させた場合には、Ｘは水素となる。）。上記アルカリ金属の水酸化物としては、水酸化ナトリウム、水酸化カリウム等が、アルカリ土類金属の水酸化物としては、水酸化カルシウム、水酸化マグネシウム等が通常用いられる。尚、（２）式に示す化合物の場合、２つのＸは同一であっても、異なっていても良い。
【００１６】
本発明において、上記（１）〜（３）式の化合物は、単独で或いは２種以上を混合して用いることができる。固体状廃棄物への添加量は、固体状廃棄物中に含まれている固定化すべき金属等の量によっても異なるが、通常、固体状廃棄物に対して、０．１〜５％程度である。
【００１７】
本発明方法が対象とする固体状廃棄物は、焼却灰や煤塵、鉱滓、活性汚泥、土壌等であるが、本発明方法は固体状廃棄物中に、強酸性物質を多量に含有する場合であっても（例えば、固体状廃棄物５０ｇを水５００ｇに添加した時の水のｐＨが４以下となるような強酸性物質を含有する場合でも）、確実に固体状廃棄物中の金属を固定化できる。固体状廃棄物を処理するには、固体状廃棄物に上記（１）〜（３）式の化合物を添加混合するだけで良いが、固体状廃棄物中の金属等を固定化する反応には水の存在が必要であるため、焼却灰、煤塵、鉱滓等を処理する場合には、（１）〜（３）式の化合物を水に分散又は溶解させた状態で固体状廃棄物に添加して混合するか、（１）〜（３）式の化合物と水とを固体状廃棄物に添加して混合する。また活性汚泥や土壌等には一般に水分が含有されているため、（１）〜（３）式の化合物を添加して混合するだけでも効果があるが、必要に応じて水を併用することが好ましい。
【００１８】
本発明方法によれば、固体状廃棄物中の水銀、カドミウム、鉛、亜鉛、銅、クロム、ニッケル等を確実に固定化できるが、固体状廃棄物中に含有される金属の種類や含有比率等によっては、通常のジチオカルバミン酸型の金属捕集剤を併用するとより効果的である場合もある。従来のジチオカルバミン酸型の金属捕集剤を併用した場合には、（１）〜（３）式で示す金属捕集剤の使用量を少なくすることができる。しかしながら、従来のジチオカルバミン酸型の金属捕集剤との併用は、固体状廃棄物中に酸性物質が存在せず、しかも金属捕集剤の併用によって（１）〜（３）で示す金属捕集剤だけの場合よりも金属の固定化力が向上する場合に限るべきである。また、たとえ有毒ガス等の発生の虞れがないとしても安易に金属捕集剤を併用すると本発明の所期の目的を損なう虞れがあるため、金属捕集剤との併用は慎重に行うべきである。
【００１９】
また本発明方法では、上記（１）〜（３）式で示す金属捕集剤の１種又は２種以上とともに、硫化ナトリウム類を併用することができる。硫化ナトリウム類としては、一硫化ナトリウム、二硫化ナトリウム、三硫化ナトリウム、四硫化ナトリウム、五硫化ナトリウム、硫化水素ナトリウム等が挙げられるが、なかでも一硫化ナトリウム、硫化水素ナトリウムが好ましい。これら硫化ナトリウム類は混合して用いることができる。金属捕集剤とともに硫化ナトリウム類を併用する場合、両者の混合比率は重量比で、金属捕集剤：硫化ナトリウム類＝２０：８０〜９５：５、特に４０：６０〜９５：５が好ましい。金属捕集剤とともに硫化ナトリウム類を併用すると、更に金属の固定化能が高められる。
【００２０】
【実施例】
以下、実施例を挙げて本発明を更に詳細に説明する。尚、以下の実施例、比較例において、固体状廃棄物の処理に使用した処理剤は以下の通りである。
【００２１】
・処理剤Ａ：（１）で示す構造の化合物。ＲＯ：メチルアルコール残基、Ｘ：ナトリウム。
・処理剤Ｂ：（１）で示す構造の化合物。ＲＯ：エチレングリコール残基、Ｘ：ナトリウム。
・処理剤Ｃ：（１）で示す構造の化合物。ＲＯ：ブチルアルコール残基及びメチルアルコール残基、Ｘ：カリウム。
・処理剤Ｄ：（１）で示す構造の化合物。ＲＯ：メチルアルコール残基及び１，２−プロパンジオール残基、Ｘ：カリウム。
・処理剤Ｅ：（１）で示す構造の化合物。ＲＯ：エチレングリコール残基及びグリセリン残基、Ｘ：ナトリウム。
【００２２】
・処理剤Ｆ：（２）で示す構造の化合物。ＲＯ：メチルアルコール残基、Ｘ：ナトリウム。
・処理剤Ｇ：（２）で示す構造の化合物。ＲＯ：ブチルアルコール残基、Ｘ：ナトリウム。
・処理剤Ｈ：（２）で示す構造の化合物。ＲＯ：エチレングリコール残基、Ｘ：ナトリウム。
【００２３】
・処理剤Ｉ：（３）で示す構造の化合物。ＲＯ：ペンタグリセリン残基、Ｘ：ナトリウム。
・処理剤Ｊ：（３）で示す構造の化合物。ＲＯ：ジエチレングリコール残基、Ｘ：ナトリウム。
【００２４】
・処理剤Ｋ：処理剤Ａと処理剤Ｆとの１：１（重量比）混合物。
・処理剤Ｌ：処理剤Ｂと処理剤Ｉとの１：２（重量比）混合物。
・処理剤Ｍ：処理剤Ｃと硫化水素ナトリウムの１：０．１（重量比）混合物。
【００２５】
・処理剤Ｎ：ジメチルジチオカルバミン酸ナトリウム。
・処理剤Ｏ：エチレンジアミン１モルに二硫化炭素２モルを反応させて得た化合物。
【００２６】
実施例１〜１３、比較例１〜２
水銀２．０ｍｇ／ｋｇ、亜鉛２５ｇ／ｋｇ、鉛４．２ｇ／ｋｇ、カドミウム０．１８ｇ／ｋｇ、カルシウム３０３ｇ／ｋｇを含む、ゴミ焼却場から得た煤塵（煤塵５０ｇを水５００ｇに添加して攪拌した時の、水のｐＨ＝１２．５）１００ｇ当たりに対して表１に示す処理剤１０ｇを水１００ｇに分散又は溶解させた溶液を同表に示す量添加し、４０℃で１０分間混練した。各処理剤で処理済の煤塵と未処理の煤塵各５０ｇを、純水５００ｍｌ中で常温にて６時間浸とうして金属の溶出試験を行った。純水中に溶出した金属の濃度を原子吸光分析法によって測定した結果を表１に示す。
【００２７】
【表１】
実施例１４〜２６、比較例３〜４
鉛２．０ｇ／ｋｇ、亜鉛４０ｇ／ｋｇ、カドミウム０．１０ｇ／ｋｇ、ニッケル１５ｇ／ｋｇ、銅７４ｇ／ｋｇを含有する鉱滓（鉱滓１００ｇを水５００ｇに添加して攪拌した時の、水のｐＨ＝７．１）１００ｇ当たりに対し、表２に示す処理剤３０ｇを水１００ｇに分散又は溶解させた溶液を同表に示す量添加し、２０℃で１５分間混練した。各処理剤で処理済の鉱滓と未処理の鉱滓各５０ｇを用い、実施例１〜１３と同様にして金属溶出試験を行った。溶出した金属の濃度を原子吸光分析法によって測定した結果を表２に示す。
【００２９】
【表２】
実施例２７〜３９、比較例５〜６
水銀０．２ｍｇ／ｋｇ、鉛０．６ｇ／ｋｇ、ニッケル０．４ｇ／ｋｇ、亜鉛１．２ｇ／ｋｇ、カドミウム０．１７ｇ／ｋｇを含有する汚泥（含水率８１％、汚泥１００ｇを水２００ｇに添加して攪拌した時の、水のｐＨ＝２．５）１００ｇ当たりに対し、表３に示す処理剤を同表に示す量添加し、常温で５分間混練した。各処理剤で処理済の汚泥と未処理の汚泥各５０ｇを用い、実施例１〜１３と同様にして金属溶出試験を行った。溶出した金属の濃度を原子吸光分析法によって測定した結果を表３に示す。
【００３１】
【表３】
実施例４０〜５２、比較例７〜８
クロム３．３ｍｇ／ｋｇ、銅１．５ｍｇ／ｋｇ、カドミウム０．８ｍｇ／ｋｇ、亜鉛１１．１ｍｇ／ｋｇ、鉛２．５ｍｇ／ｋｇを含有する土壌（土壌５０ｇを水５００ｇに添加して攪拌した時の、水のｐＨ＝８．４）１００ｇ当たりに対し、表４に示す処理剤４０ｇを水１００ｇに分散又は溶解した溶液を同表に示す量添加し、常温で２５分間混練した。各処理剤で処理済の土壌と未処理の土壌各５０ｇを用い、実施例１〜１３と同様にして金属溶出試験を行った。溶出した金属の濃度を原子吸光分析法によって測定した結果を表４に示す。
【００３３】
【表４】
【発明の効果】
以上説明したように本発明方法によれば、固体状廃棄物中の有害金属類を確実に固定化して溶出を防止でき、地中埋設したり海中に投棄して最終処分した場合でも、処理物から金属が地中や海中に溶出して再汚染を生じる等の虞れがなく、固体状廃棄物を確実に処理できる。また、固体状廃棄物中に酸性物質を含有する場合でも、固体状廃棄物中の金属の固定化能に優れ、しかも従来のジチオカルバミン酸型の金属捕集剤のように有毒ガスを発生する虞れもない等の効果を有する。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a method for treating solid waste, which can fix metals present in solid waste such as incineration ash, dust, slag, sludge, soil and the like, and can prevent elution from these solid waste. About.
[0002]
[Prior art]
Various metal elements are contained in solid waste such as incineration ash and dust generated in garbage incineration plants, slag discharged from mines, activated sludge used in wastewater treatment, and contaminated soil. In many cases, heavy metal elements harmful to the human body, such as mercury, cadmium, lead, zinc, copper, and chromium, are contained in large amounts. When metals are eluted from these solid wastes, there is a possibility that groundwater, rivers, seawater, etc. will be contaminated.
[0003]
For this reason, conventionally, solid waste was solidified with cement and then buried and treated.However, when it comes into contact with seawater or rainwater, metals may elute into seawater or soil through the cement wall. However, this method was not always a safe processing method. In order to solve such a problem, the present applicant has added a metal collecting agent having a dithioic acid group or a salt thereof as a functional group to solid waste, and the metal in the solid waste has been added by the metal collecting agent. Various methods for immobilization have been proposed (for example, JP-A-64-90083, JP-A-1-99679, JP-A-4-267982, etc.).
[0004]
[Problems to be solved by the invention]
However, the metal trapping agent used in the above-mentioned conventional method is poor in metal trapping ability under acidity, and when the solid waste contains an acidic substance, the metal in the solid waste can be reliably fixed. There is a problem of disappearing. For example, fly ash generated in garbage incineration plants is a residue of incineration of garbage, so various materials are contained in fly ash. Substances may be contained, and particularly, fly ash from a melting furnace may contain a large amount of acidic substances. In addition, many slag, sludge, contaminated soil, and the like contain an acidic substance. When a metal-collecting agent having a dithioic acid group or a salt thereof as a functional group is added to a solid waste containing such an acidic substance, immobilization of the metal in the solid waste becomes insufficient and the solid waste becomes solid. There is a risk of contamination due to metal elution from the waste and a danger of generating hydrogen sulfide gas.
[0005]
The present invention has been made in order to solve the above-mentioned problems, and even in the case of solid waste containing a large amount of an acidic substance, the metal in the waste can be reliably fixed, and hydrogen sulfide gas is generated. It is an object of the present invention to provide a method for treating solid waste that is unlikely to be performed.
[0006]
[Means for Solving the Problems]
That is, the method for treating solid waste according to the present invention comprises adding one or more of metal trapping agents represented by the following formulas (1), (2) and (3) to the solid waste; It is characterized by immobilizing metals in solid waste.
[0007]
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[0010]
In the method of the present invention, sodium sulfide may be added to the solid waste together with the solid metal trapping agent.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
In the compounds represented by the formulas (1) and (2) used in the present invention, RO represents an alcohol residue having 1 to 28 carbon atoms, and the compounds represented by the formulas (1) and (2) are, for example, alcohols It is obtained by reacting with diphosphorus pentasulfide. Examples of the alcohol include a monohydric alcohol and a polyhydric alcohol. In the case of a monohydric alcohol, one having 1 to 28 carbon atoms is used, and in the case of a polyhydric alcohol, one having 2 to 28 carbon atoms is used. The compound of the formula (1) is obtained by reacting diphosphorus pentasulfide at a ratio of 0.05 to 2.0 mol per mol of alcohol in the presence of a non-aqueous solvent such as carbon disulfide, carbon tetrachloride or alcohol. It is obtained by doing. In the compound of the formula (1), the two ROs may be residues of the same alcohol or different alcohols.
[0012]
The compound of the above formula (2) can be obtained by reacting 0.05 to 1.0 mol of diphosphorus pentasulfide per 1 mol of alcohol in the presence of a non-aqueous solvent. On the other hand, the compound of the above formula (3) is obtained by reacting 0.05 to 2.0 mol of diphosphorus pentasulfide per mol of a polyhydric alcohol having 2 to 28 carbon atoms.
[0013]
Examples of the monohydric alcohol having 1 to 28 carbon atoms include methyl alcohol, ethyl alcohol, propyl alcohol, isopropyl alcohol, butyl alcohol, isobutyl alcohol, amyl alcohol, hexyl alcohol, octyl alcohol, nonyl alcohol, decyl alcohol, lauryl alcohol, Aliphatic saturated alcohols such as myristyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, and melisyl alcohol; aliphatic unsaturated alcohols such as allyl alcohol, crotyl alcohol and propargyl alcohol; alicyclic alcohols such as cyclopentanol and cyclohexanol Aromatic alcohols such as benzyl alcohol and cinnamyl alcohol, and heterocyclic alcohols such as furfuryl alcohol. It is below.
[0014]
Examples of the polyhydric alcohol having 2 to 28 carbon atoms include ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol, and 1,5-pentane. Diol, diethylene glycol, triethylene glycol, diethylene glycol monoalkyl ether, polyethylene glycol monoalkyl ether, polyethylene glycol, glycerin, pentaglycerin, sorbitan, mannitan, trait, erythrit, pentaerythrit, arabit, rebit, xylit, ramnit, sorbit, Mannit, idit, talit, galactit, alit, altolit and the like.
[0015]
In the above formulas (1), (2), and (3), X is hydrogen, an alkali metal, an alkaline earth metal, or ammonium, and a compound in which X is an alkali metal, an alkaline earth metal, or ammonium is an alcohol. When reacting with phosphorus pentasulfide in the presence of an alkali such as an alkali metal hydroxide, an alkaline earth metal hydroxide, or ammonia, or by treating with an alkali after completion of the reaction (alcohol) When X is reacted with diphosphorus pentasulfide in the absence of an alkali, X is hydrogen.) Sodium hydroxide, potassium hydroxide and the like are usually used as the alkali metal hydroxide, and calcium hydroxide, magnesium hydroxide and the like are usually used as the alkaline earth metal hydroxide. In the case of the compound represented by the formula (2), two Xs may be the same or different.
[0016]
In the present invention, the compounds of the above formulas (1) to (3) can be used alone or in combination of two or more. The amount added to the solid waste varies depending on the amount of the metal or the like to be immobilized contained in the solid waste, but is usually about 0.1 to 5% based on the solid waste. is there.
[0017]
The solid wastes targeted by the method of the present invention are incinerated ash, dust, slag, activated sludge, soil, etc., but the method of the present invention involves the case where solid waste contains a large amount of a strongly acidic substance. Even if it is present (for example, when a strongly acidic substance such that the pH of water when 50 g of solid waste is added to 500 g of water becomes 4 or less is contained), the metal in the solid waste is fixed securely. Can be To treat solid waste, it is only necessary to add and mix the compounds of the above formulas (1) to (3) to the solid waste. Since the presence of water is necessary, when treating incinerated ash, dust, slag, etc., the compounds of formulas (1) to (3) are added to solid waste in a state of being dispersed or dissolved in water. Or the compounds of formulas (1) to (3) and water are added to the solid waste and mixed. In addition, since activated sludge and soil generally contain water, it is effective to simply add and mix the compounds of the formulas (1) to (3). preferable.
[0018]
According to the method of the present invention, mercury, cadmium, lead, zinc, copper, chromium, nickel, and the like in solid waste can be reliably immobilized, but the type and content ratio of the metal contained in the solid waste In some cases, it may be more effective to use a common dithiocarbamic acid-type metal collector in combination. When a conventional dithiocarbamic acid-type metal collecting agent is used in combination, the amount of the metal collecting agent represented by the formulas (1) to (3) can be reduced. However, in combination with the conventional dithiocarbamic acid type metal collecting agent, no acidic substance is present in the solid waste, and the metal collecting agent shown in (1) to (3) is used in combination with the metal collecting agent. It should be limited to the case where the immobilizing power of the metal is higher than that of the agent alone. Further, even if there is no danger of generation of toxic gas or the like, if the metal collecting agent is easily used in combination, the intended purpose of the present invention may be impaired. Should.
[0019]
In the method of the present invention, sodium sulfides can be used in combination with one or more of the metal collectors represented by the above formulas (1) to (3). Examples of the sodium sulfide include sodium monosulfide, sodium disulfide, sodium trisulfide, sodium tetrasulfide, sodium pentasulfide, and sodium hydrogen sulfide. Among them, sodium monosulfide and sodium hydrogen sulfide are preferable. These sodium sulfides can be used as a mixture. When sodium sulfides are used in combination with the metal collecting agent, the mixing ratio of the two is preferably 20:80 to 95: 5, particularly preferably 40:60 to 95: 5 by weight. When sodium sulfides are used in combination with the metal collecting agent, the ability to immobilize the metal is further enhanced.
[0020]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples. In the following Examples and Comparative Examples, treatment agents used for treating solid waste are as follows.
[0021]
Treatment agent A: a compound having the structure shown in (1). RO: methyl alcohol residue, X: sodium.
Treatment agent B: a compound having the structure shown in (1). RO: ethylene glycol residue, X: sodium.
Treatment agent C: a compound having the structure shown in (1). RO: butyl alcohol residue and methyl alcohol residue, X: potassium.
Treatment agent D: a compound having the structure shown in (1). RO: methyl alcohol residue and 1,2-propanediol residue, X: potassium.
Treatment agent E: a compound having the structure shown in (1). RO: ethylene glycol residue and glycerin residue, X: sodium.
[0022]
Treatment agent F: a compound having the structure shown in (2). RO: methyl alcohol residue, X: sodium.
Treatment agent G: a compound having a structure represented by (2). RO: butyl alcohol residue, X: sodium.
Treatment agent H: a compound having a structure represented by (2). RO: ethylene glycol residue, X: sodium.
[0023]
Treatment agent I: a compound having the structure shown in (3). RO: pentaglycerin residue, X: sodium.
Treatment agent J: a compound having a structure represented by (3). RO: diethylene glycol residue, X: sodium.
[0024]
Treatment agent K: 1: 1 (weight ratio) mixture of treatment agent A and treatment agent F
Treatment agent L: a mixture of treatment agent B and treatment agent I in a ratio of 1: 2 (weight ratio).
Treatment agent M: a mixture of treatment agent C and sodium hydrogen sulfide at a ratio of 1: 0.1 (weight ratio).
[0025]
-Treatment agent N: sodium dimethyldithiocarbamate.
Treatment agent O: a compound obtained by reacting 1 mol of ethylenediamine with 2 mol of carbon disulfide.
[0026]
Examples 1 to 13 and Comparative Examples 1 and 2
Dust (50 g of dust added to 500 g of water) obtained from a garbage incineration plant containing 2.0 mg / kg of mercury, 25 g / kg of zinc, 4.2 g / kg of lead, 0.18 g / kg of cadmium, and 303 g / kg of calcium (PH of water at stirring = 12.5) A solution obtained by dispersing or dissolving 10 g of the treating agent shown in Table 1 in 100 g of water per 100 g was added, and kneaded at 40 ° C. for 10 minutes. did. 50 g each of the dust treated with each treating agent and the untreated dust were immersed in 500 ml of pure water at room temperature for 6 hours to conduct a metal elution test. Table 1 shows the results obtained by measuring the concentration of the metal eluted in pure water by atomic absorption spectrometry.
[0027]
[Table 1]
Examples 14 to 26, Comparative Examples 3 to 4
A slag containing 2.0 g / kg of lead, 40 g / kg of zinc, 0.10 g / kg of cadmium, 15 g / kg of nickel and 74 g / kg of copper (pH of water when 100 g of slag was added to 500 g of water and stirred) = 7.1) A solution prepared by dispersing or dissolving 30 g of the treating agent shown in Table 2 in 100 g of water was added per 100 g, and kneaded at 20 ° C. for 15 minutes. A metal dissolution test was performed in the same manner as in Examples 1 to 13, using 50 g each of the slag that had been treated with each treatment agent and the untreated slag. Table 2 shows the result of measuring the concentration of the eluted metal by atomic absorption spectrometry.
[0029]
[Table 2]
Examples 27 to 39, Comparative Examples 5 to 6
Sludge containing 0.2 mg / kg of mercury, 0.6 g / kg of lead, 0.4 g / kg of nickel, 1.2 g / kg of zinc, and 0.17 g / kg of cadmium (water content: 81%, 100 g of sludge to 200 g of water) The treating agent shown in Table 3 was added to 100 g per 100 g of the added and stirred water (pH = 2.5) and kneaded at room temperature for 5 minutes. A metal dissolution test was performed in the same manner as in Examples 1 to 13, using 50 g of each of the sludge treated with each treatment agent and the untreated sludge. Table 3 shows the results of measuring the concentration of the eluted metal by atomic absorption spectrometry.
[0031]
[Table 3]
Examples 40 to 52, Comparative Examples 7 to 8
A soil containing 3.3 mg / kg of chromium, 1.5 mg / kg of copper, 0.8 mg / kg of cadmium, 11.1 mg / kg of zinc, and 2.5 mg / kg of lead (50 g of soil was added to 500 g of water and stirred. Then, a solution in which 40 g of the treating agent shown in Table 4 was dispersed or dissolved in 100 g of water was added per 100 g of water (pH = 8.4), and kneaded at room temperature for 25 minutes. A metal dissolution test was carried out in the same manner as in Examples 1 to 13, using 50 g of soil treated with each treatment agent and 50 g of untreated soil. Table 4 shows the result of measuring the concentration of the eluted metal by atomic absorption spectrometry.
[0033]
[Table 4]
【The invention's effect】
As described above, according to the method of the present invention, harmful metals in solid waste can be securely immobilized to prevent elution, and even when buried underground or dumped into the sea and finally disposed of, the treated material can be treated. Therefore, there is no fear that the metal is eluted into the ground or the sea to cause recontamination, and the solid waste can be surely treated. Further, even when the solid waste contains an acidic substance, the solid waste has an excellent ability to immobilize the metal, and may generate toxic gas like a conventional dithiocarbamic acid type metal collector. It has the effect that there is no such thing.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04666396A JP3591552B2 (en) | 1996-02-08 | 1996-02-08 | Solid waste treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04666396A JP3591552B2 (en) | 1996-02-08 | 1996-02-08 | Solid waste treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09215968A JPH09215968A (en) | 1997-08-19 |
| JP3591552B2 true JP3591552B2 (en) | 2004-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04666396A Expired - Fee Related JP3591552B2 (en) | 1996-02-08 | 1996-02-08 | Solid waste treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3591552B2 (en) |
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1996
- 1996-02-08 JP JP04666396A patent/JP3591552B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09215968A (en) | 1997-08-19 |
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