JP4420636B2 - 有害物質処理材とその製造方法 - Google Patents
有害物質処理材とその製造方法 Download PDFInfo
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- JP4420636B2 JP4420636B2 JP2003305122A JP2003305122A JP4420636B2 JP 4420636 B2 JP4420636 B2 JP 4420636B2 JP 2003305122 A JP2003305122 A JP 2003305122A JP 2003305122 A JP2003305122 A JP 2003305122A JP 4420636 B2 JP4420636 B2 JP 4420636B2
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- Prior art keywords
- iron
- treatment material
- iron oxide
- hazardous substance
- inorganic fiber
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- 239000000463 material Substances 0.000 title claims description 90
- 238000011282 treatment Methods 0.000 title claims description 66
- 238000004519 manufacturing process Methods 0.000 title claims description 16
- 239000013056 hazardous product Substances 0.000 title 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 96
- 239000012784 inorganic fiber Substances 0.000 claims description 67
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 67
- 229910052742 iron Inorganic materials 0.000 claims description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 46
- 239000000126 substance Substances 0.000 claims description 36
- 239000011490 mineral wool Substances 0.000 claims description 33
- -1 iron oxide compound Chemical class 0.000 claims description 31
- 239000000383 hazardous chemical Substances 0.000 claims description 29
- 230000002378 acidificating effect Effects 0.000 claims description 27
- 239000002351 wastewater Substances 0.000 claims description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 21
- 229910052785 arsenic Inorganic materials 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 20
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims description 19
- 239000000835 fiber Substances 0.000 claims description 19
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 17
- 239000002002 slurry Substances 0.000 claims description 17
- 229910052598 goethite Inorganic materials 0.000 claims description 16
- AEIXRCIKZIZYPM-UHFFFAOYSA-M hydroxy(oxo)iron Chemical compound [O][Fe]O AEIXRCIKZIZYPM-UHFFFAOYSA-M 0.000 claims description 16
- 150000001875 compounds Chemical class 0.000 claims description 15
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 15
- 235000012239 silicon dioxide Nutrition 0.000 claims description 15
- 150000003839 salts Chemical class 0.000 claims description 14
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 13
- 239000011790 ferrous sulphate Substances 0.000 claims description 13
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 13
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 13
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 13
- 229910052698 phosphorus Inorganic materials 0.000 claims description 13
- 239000011574 phosphorus Substances 0.000 claims description 13
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 12
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 11
- 239000007864 aqueous solution Substances 0.000 claims description 11
- 238000006386 neutralization reaction Methods 0.000 claims description 11
- 229960002089 ferrous chloride Drugs 0.000 claims description 10
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims description 9
- 239000000377 silicon dioxide Substances 0.000 claims description 8
- 241000894006 Bacteria Species 0.000 claims description 7
- PMVSDNDAUGGCCE-TYYBGVCCSA-L Ferrous fumarate Chemical compound [Fe+2].[O-]C(=O)\C=C\C([O-])=O PMVSDNDAUGGCCE-TYYBGVCCSA-L 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 7
- 239000010954 inorganic particle Substances 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 239000002893 slag Substances 0.000 claims description 6
- 231100000167 toxic agent Toxicity 0.000 claims description 6
- 239000003440 toxic substance Substances 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 4
- 239000004567 concrete Substances 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000002657 fibrous material Substances 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 claims description 3
- 239000011491 glass wool Substances 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- MKTRXTLKNXLULX-UHFFFAOYSA-P pentacalcium;dioxido(oxo)silane;hydron;tetrahydrate Chemical compound [H+].[H+].O.O.O.O.[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O MKTRXTLKNXLULX-UHFFFAOYSA-P 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 2
- 238000001354 calcination Methods 0.000 claims description 2
- 235000013980 iron oxide Nutrition 0.000 description 37
- 239000000047 product Substances 0.000 description 17
- 150000002506 iron compounds Chemical class 0.000 description 16
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 description 12
- 238000012545 processing Methods 0.000 description 11
- 239000000243 solution Substances 0.000 description 10
- 238000010304 firing Methods 0.000 description 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 8
- 229910001112 rose gold Inorganic materials 0.000 description 8
- 238000003756 stirring Methods 0.000 description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 6
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 6
- 229910002651 NO3 Inorganic materials 0.000 description 6
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 6
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-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
- 229910052731 fluorine Inorganic materials 0.000 description 6
- 239000011737 fluorine Substances 0.000 description 6
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 6
- 229910052711 selenium Inorganic materials 0.000 description 6
- 239000011669 selenium Substances 0.000 description 6
- 229910052770 Uranium Inorganic materials 0.000 description 5
- 229910052787 antimony Inorganic materials 0.000 description 5
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 5
- 239000011400 blast furnace cement Substances 0.000 description 5
- 229910001385 heavy metal Inorganic materials 0.000 description 5
- 229910052595 hematite Inorganic materials 0.000 description 5
- 239000011019 hematite Substances 0.000 description 5
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 5
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- DNYWZCXLKNTFFI-UHFFFAOYSA-N uranium Chemical compound [U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U] DNYWZCXLKNTFFI-UHFFFAOYSA-N 0.000 description 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 4
- 229910052934 alunite Inorganic materials 0.000 description 4
- 239000010424 alunite Substances 0.000 description 4
- 239000012298 atmosphere Substances 0.000 description 4
- 238000000151 deposition Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- KPZTWMNLAFDTGF-UHFFFAOYSA-D trialuminum;potassium;hexahydroxide;disulfate Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Al+3].[Al+3].[Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O KPZTWMNLAFDTGF-UHFFFAOYSA-D 0.000 description 4
- MHUWZNTUIIFHAS-XPWSMXQVSA-N 9-octadecenoic acid 1-[(phosphonoxy)methyl]-1,2-ethanediyl ester Chemical compound CCCCCCCC\C=C\CCCCCCCC(=O)OCC(COP(O)(O)=O)OC(=O)CCCCCCC\C=C\CCCCCCCC MHUWZNTUIIFHAS-XPWSMXQVSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 235000011116 calcium hydroxide Nutrition 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 3
- 238000004040 coloring Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 229910052602 gypsum Inorganic materials 0.000 description 3
- 239000010440 gypsum Substances 0.000 description 3
- 231100001261 hazardous Toxicity 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 230000020477 pH reduction Effects 0.000 description 3
- 229940047047 sodium arsenate Drugs 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 229910052950 sphalerite Inorganic materials 0.000 description 3
- 239000008399 tap water Substances 0.000 description 3
- 235000020679 tap water Nutrition 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 description 2
- 235000014413 iron hydroxide Nutrition 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- GLGNXYJARSMNGJ-VKTIVEEGSA-N (1s,2s,3r,4r)-3-[[5-chloro-2-[(1-ethyl-6-methoxy-2-oxo-4,5-dihydro-3h-1-benzazepin-7-yl)amino]pyrimidin-4-yl]amino]bicyclo[2.2.1]hept-5-ene-2-carboxamide Chemical group CCN1C(=O)CCCC2=C(OC)C(NC=3N=C(C(=CN=3)Cl)N[C@H]3[C@H]([C@@]4([H])C[C@@]3(C=C4)[H])C(N)=O)=CC=C21 GLGNXYJARSMNGJ-VKTIVEEGSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- DJHGAFSJWGLOIV-UHFFFAOYSA-K Arsenate3- Chemical class [O-][As]([O-])([O-])=O DJHGAFSJWGLOIV-UHFFFAOYSA-K 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 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 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 229910052915 alkaline earth metal silicate Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229940000489 arsenate Drugs 0.000 description 1
- OWTFKEBRIAXSMO-UHFFFAOYSA-N arsenite(3-) Chemical compound [O-][As]([O-])[O-] OWTFKEBRIAXSMO-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 229910021506 iron(II) hydroxide Inorganic materials 0.000 description 1
- 229910052935 jarosite Inorganic materials 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002557 mineral fiber Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Treatment Of Water By Ion Exchange (AREA)
- Removal Of Specific Substances (AREA)
- Water Treatment By Sorption (AREA)
Description
そして、非特許文献1には、シュベルトマナイトの表面活性サイトのキャラクタリゼーションと表面錯体モデルの適用と題して、窒素雰囲気のグローブボックス内で、NaOH溶液によるシュベルトマナイトの断続的滴定を行った結果が示されている。
また、非特許文献2には、鉱山酸性排水中に鉄酸化細菌や硫黄酸化細菌が存在すると、水面に油が浮いたような皮膜状に浮かぶ物質(バイオフィルム)が生成されており、schwertmanniteと同定されたことが開示されている。
こうした有害物質処理材は、無機繊維又は無機繊維含有材料を、シュベルトマナイト、赤金鉱、フェリハイドライト、針鉄鉱、アモルファス含水酸化鉄、硫酸第二鉄、硫酸第一鉄、塩化第二鉄、塩化第一鉄、硝酸第二鉄及び、硝酸第一鉄から選ばれる少なくとも一種の鉄化合物含有水溶液若しくはスラリー、又は含鉄酸性坑廃水中和処理殿物含有スラリーに浸漬した後、焼成して繊維状に形成された酸化鉄系化合物とすることによって製造することができる。
本発明の有害物質処理材は、繊維状に形成された酸化鉄系化合物を含有するものである。ここで、繊維状の酸化鉄系化合物は、酸化鉄系化合物自体が繊維状に形成されたものでもよいし、酸化鉄系化合物が無機繊維又は無機繊維含有材料(以下、無機繊維又は無機繊維含有材料を無機繊維等という)に担持されて繊維状に形成されたものでもよい。好ましくは無機繊維等に担持されて、無機繊維の繊維形状と類似の繊維形状を有する後者であり、より好ましくは、酸化鉄系化合物が無機繊維を鞘状に囲んで担持されたものである。
含鉄酸性水の酸性物質と珪酸塩系繊維状無機物質のアルカリ物質との関係にもよるが、処理条件が酸性(pH2〜5程度)である場合には、含水鉄酸化物として、シュベルトマナイト、赤金鉱、針鉄鉱、鉄明礬石が生成される。酸性条件の場合、鉄の酸化を促進するために、鉄酸化細菌が存在することが好ましい。一方、処理条件がアルカリ性(pH>7)である場合には、含水鉄酸化物として、フェリハイドライト、鱗鉄鉱、赤鉄鉱、磁鉄鉱、磁赤鉄鉱が生成される。この場合、鉄酸化細菌が存在しない空気酸化によって、鉄は酸化される。
繊維状無機物質に担持された酸化鉄系化合物を得るため、表1に示す化学組成を有するロックウール(RW:新日化ロックウール株式会社製、エスファイバー粒状綿、平均粒径30mm)及び高炉セメント(BC:新日鐵高炉セメント株式会社製、B種高炉セメント)を使用し、ロックウール60重量%、高炉セメント40重量%をリボンミキサーで攪拌混合し、平均粒径20mm、嵩比重0.15、空隙率94%の粒状混合物を製造した。
得られた混合物をるつぼごと電気炉で酸化雰囲気中、焼成温度350℃、1時間焼成し、冷却後、内容物を取り出し、メノウ乳鉢で粗粉砕して、処理材A〜Cを得た。
繊維状無機物質に担持された酸化鉄系化合物を得るため、実施例1で使用したロックウール及び高炉セメントを使用し、次に水溶性酸性含鉄化合物として、試薬の硫酸第一鉄、硫酸第二鉄を用い、それぞれの鉄分含有量と繊維状無機物質との重量がほぼ同一となるように表4の配合組成のとおり混合し、混合物を磁性るつぼ中に入れ、表4に示す量の水を添加した上、攪拌して1時間放置した。表4の数字は重量部を表す。なお、金属鉄含有量としては5重量部である。
次に、得られた混合物をるつぼごと電気炉で酸化雰囲気中、焼成温度350℃、1時間焼成し、冷却後、内容物を取り出し、メノウ乳鉢で粗粉砕して処理材D、Eを得た。
繊維状無機物質に担持された酸化鉄系化合物を得るため、実施例1で使用したロックウールを使用し、次に酸性含鉄化合物として、シュベルトマナイトと針鉄鉱の混合物からなる含鉄酸性坑廃水中の沈殿物(含鉄酸性坑廃水中和処理殿物)15重量部(金属鉄として5重量部)を用い、それぞれの鉄分含有量と繊維状無機物質との重量がほぼ同一となるように表6の配合組成のとおり混合し、混合物を磁性るつぼ中に入れ、表6に示す量の水を添加した上、攪拌して1時間放置した。
次に、同上の混合物をるつぼごと電気炉で酸化雰囲気中、表6に示す焼成温度で1時間焼成し、冷却後、内容物を取り出し、メノウ乳鉢で粗粉砕して、処理材H〜Kを得た。
Claims (9)
- 有害物質として砒素、及びリンの少なくとも一種を含有する水を処理するための有害物質処理材であって、無機繊維又は無機繊維含有材料に酸化鉄系化合物が担持され、該酸化鉄系化合物が、シュベルトマナイト焼成物、針鉄鉱焼成物、硫酸第二鉄焼成物、硫酸第一鉄焼成物、及び塩化第一鉄焼成物から選ばれる少なくとも一種であることを特徴とする有害物質処理材。
- 無機繊維が珪酸(塩)系無機繊維であり、無機繊維含有材料が珪酸(塩)系無機繊維と珪酸塩系無機粉粒体との混合物である請求項1に記載の有害物質処理材。
- 珪酸(塩)系無機繊維が、ロックウール、ニッケルスラグウール、ガラスウール、シリカ繊維、セラミツクファイバー、トバモライト、及びゾノトライトから選ばれる少なくとも一種である請求項2に記載の有害物質処理材。
- 珪酸塩系無機粉粒体が、セメント、セメントクリンカー、製鉄スラグ、非鉄スラグ、フライアッシュ、及びコンクリート破砕物から選ばれる少なくとも一種である請求項2又は3に記載の有害物質処理材。
- 有害物質処理材が、空隙率50%以上、嵩比重0.1〜1.5である請求項1〜4のいずれかに記載の有害物質処理材。
- 有害物質として砒素、及びリンの少なくとも一種を含有する水を処理するための有害物質処理材の製造方法であって、無機繊維又は無機繊維含有材料を、シュベルトマナイト、針鉄鉱、硫酸第二鉄、硫酸第一鉄、及び塩化第一鉄から選ばれる少なくとも一種の鉄化合物含有水溶液若しくはスラリー、又は含鉄酸性坑廃水中和処理殿物含有スラリーに浸漬した後、焼成して繊維状に形成された酸化鉄系化合物とすることを特徴とする有害物質処理材の製造方法。
- 有害物質として砒素、及びリンの少なくとも一種を含有する水を処理するための有害物質除去材であって、シュベルトマナイト焼成物、針鉄鉱焼成物、硫酸第二鉄焼成物、硫酸第一鉄焼成物、及び塩化第一鉄焼成物から選ばれる酸化鉄系化合物の少なくとも一種からなることを特徴とする有害物質処理材。
- 有害物質として砒素、及びリンの少なくとも一種を含有する水を処理するための有害物質処理材の製造方法であって、シュベルトマナイト、針鉄鉱、硫酸第二鉄、硫酸第一鉄、及び塩化第一鉄から選ばれる少なくとも一種の鉄化合物又は含鉄酸性坑廃水中和処理殿物を焼成して酸化鉄系化合物とすることを特徴とする有害物質処理材の製造方法。
- 有害物質として砒素、及びリンの少なくとも一種を含有する水を処理するための有害物質処理材の製造方法であって、珪酸塩系無機繊維又は該無機繊維含有材料を、鉄酸化細菌が存在するpH2〜5の含鉄酸性廃水の処理に使用し、少なくとも一部が酸と反応して珪酸分の割合が増加した繊維状材料に担持された含水鉄酸化物を含む材料とし、該含水鉄酸化物を焼成して酸化鉄系化合物とすることを特徴とする有害物質処理材の製造方法。
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