JP2004202449A - Method for removing heavy metal in incineration ash - Google Patents
Method for removing heavy metal in incineration ash Download PDFInfo
- Publication number
- JP2004202449A JP2004202449A JP2002377524A JP2002377524A JP2004202449A JP 2004202449 A JP2004202449 A JP 2004202449A JP 2002377524 A JP2002377524 A JP 2002377524A JP 2002377524 A JP2002377524 A JP 2002377524A JP 2004202449 A JP2004202449 A JP 2004202449A
- Authority
- JP
- Japan
- Prior art keywords
- heavy metal
- water
- heavy metals
- acid
- kri
- 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.)
- Pending
Links
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000003463 adsorbent Substances 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000007864 aqueous solution Substances 0.000 claims abstract description 18
- 239000002440 industrial waste Substances 0.000 claims abstract description 14
- 230000002378 acidificating effect Effects 0.000 claims description 7
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 239000002028 Biomass Substances 0.000 claims description 3
- 239000003456 ion exchange resin Substances 0.000 claims description 3
- 229920003303 ion-exchange polymer Polymers 0.000 claims description 3
- 239000013522 chelant Substances 0.000 claims description 2
- 238000010923 batch production Methods 0.000 claims 1
- 238000004064 recycling Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 abstract 1
- 241000894006 Bacteria Species 0.000 description 19
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 18
- 210000004027 cell Anatomy 0.000 description 17
- 238000001179 sorption measurement Methods 0.000 description 15
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 12
- 238000010306 acid treatment Methods 0.000 description 11
- 238000012360 testing method Methods 0.000 description 11
- 230000001580 bacterial effect Effects 0.000 description 10
- 239000002253 acid Substances 0.000 description 8
- 239000002699 waste material Substances 0.000 description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 6
- 244000005700 microbiome Species 0.000 description 6
- 241000194108 Bacillus licheniformis Species 0.000 description 5
- 239000007983 Tris buffer Substances 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 239000006228 supernatant Substances 0.000 description 5
- 239000000725 suspension Substances 0.000 description 5
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 5
- 229920001817 Agar Polymers 0.000 description 4
- 241001147693 Staphylococcus sp. Species 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000008272 agar Substances 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- 229910052793 cadmium Inorganic materials 0.000 description 4
- 239000000969 carrier Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000004056 waste incineration Methods 0.000 description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 210000004556 brain Anatomy 0.000 description 3
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 3
- 239000003729 cation exchange resin Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000003795 desorption Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 239000000499 gel Substances 0.000 description 3
- 239000011133 lead Substances 0.000 description 3
- 150000007522 mineralic acids Chemical class 0.000 description 3
- 241000894007 species Species 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- 241000193830 Bacillus <bacterium> Species 0.000 description 2
- 241000194110 Bacillus sp. (in: Bacteria) Species 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 241000191940 Staphylococcus Species 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010828 elution Methods 0.000 description 2
- 238000004108 freeze drying Methods 0.000 description 2
- 239000008103 glucose Substances 0.000 description 2
- 238000001802 infusion Methods 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 239000010813 municipal solid waste Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- 241000512260 Ascophyllum Species 0.000 description 1
- 241000228212 Aspergillus Species 0.000 description 1
- 241001474374 Blennius Species 0.000 description 1
- 241000222120 Candida <Saccharomycetales> Species 0.000 description 1
- 102000016938 Catalase Human genes 0.000 description 1
- 108010053835 Catalase Proteins 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 241000222290 Cladosporium Species 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- 241000195480 Fucus Species 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- MBBZMMPHUWSWHV-BDVNFPICSA-N N-methylglucamine Chemical group CNC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO MBBZMMPHUWSWHV-BDVNFPICSA-N 0.000 description 1
- 241000228143 Penicillium Species 0.000 description 1
- 241000235648 Pichia Species 0.000 description 1
- 229920002873 Polyethylenimine Polymers 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 241000235527 Rhizopus Species 0.000 description 1
- 241000235070 Saccharomyces Species 0.000 description 1
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 241000223259 Trichoderma Species 0.000 description 1
- 150000003926 acrylamides Chemical class 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 239000007853 buffer solution Substances 0.000 description 1
- 239000000648 calcium alginate Substances 0.000 description 1
- 235000010410 calcium alginate Nutrition 0.000 description 1
- 229960002681 calcium alginate Drugs 0.000 description 1
- OKHHGHGGPDJQHR-YMOPUZKJSA-L calcium;(2s,3s,4s,5s,6r)-6-[(2r,3s,4r,5s,6r)-2-carboxy-6-[(2r,3s,4r,5s,6r)-2-carboxylato-4,5,6-trihydroxyoxan-3-yl]oxy-4,5-dihydroxyoxan-3-yl]oxy-3,4,5-trihydroxyoxane-2-carboxylate Chemical compound [Ca+2].O[C@@H]1[C@H](O)[C@H](O)O[C@@H](C([O-])=O)[C@H]1O[C@H]1[C@@H](O)[C@@H](O)[C@H](O[C@H]2[C@H]([C@@H](O)[C@H](O)[C@H](O2)C([O-])=O)O)[C@H](C(O)=O)O1 OKHHGHGGPDJQHR-YMOPUZKJSA-L 0.000 description 1
- DKVNPHBNOWQYFE-UHFFFAOYSA-N carbamodithioic acid Chemical group NC(S)=S DKVNPHBNOWQYFE-UHFFFAOYSA-N 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 235000010418 carrageenan Nutrition 0.000 description 1
- 229920001525 carrageenan Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 229920001429 chelating resin Polymers 0.000 description 1
- SFZULDYEOVSIKM-UHFFFAOYSA-N chembl321317 Chemical group C1=CC(C(=N)NO)=CC=C1C1=CC=C(C=2C=CC(=CC=2)C(=N)NO)O1 SFZULDYEOVSIKM-UHFFFAOYSA-N 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000007922 dissolution test Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- DEFVIWRASFVYLL-UHFFFAOYSA-N ethylene glycol bis(2-aminoethyl)tetraacetic acid Chemical compound OC(=O)CN(CC(O)=O)CCOCCOCCN(CC(O)=O)CC(O)=O DEFVIWRASFVYLL-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 210000003495 flagella Anatomy 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- NBZBKCUXIYYUSX-UHFFFAOYSA-N iminodiacetic acid Chemical group OC(=O)CNCC(O)=O NBZBKCUXIYYUSX-UHFFFAOYSA-N 0.000 description 1
- 230000003100 immobilizing effect Effects 0.000 description 1
- 230000006799 invasive growth in response to glucose limitation Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000010814 metallic waste Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004899 motility Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- OZHOHTGAQOJLCS-UHFFFAOYSA-N oxalic acid;propanoic acid Chemical compound CCC(O)=O.OC(=O)C(O)=O OZHOHTGAQOJLCS-UHFFFAOYSA-N 0.000 description 1
- 238000006395 oxidase reaction Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 230000001766 physiological effect Effects 0.000 description 1
- 239000002504 physiological saline solution Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- MSXHSNHNTORCAW-MPGIDXPLSA-M sodium;(3s,4s,5s,6r)-3,4,5,6-tetrahydroxyoxane-2-carboxylate Chemical compound [Na+].O[C@@H]1OC(C([O-])=O)[C@@H](O)[C@H](O)[C@@H]1O MSXHSNHNTORCAW-MPGIDXPLSA-M 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea group Chemical group NC(=S)N UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 229940005605 valeric acid Drugs 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/70—Chemical treatment, e.g. pH adjustment or oxidation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/80—Destroying solid waste or transforming solid waste into something useful or harmless involving an extraction step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/62—Heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B2101/00—Type of solid waste
- B09B2101/30—Incineration ashes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/26—Treatment of water, waste water, or sewage by extraction
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Microbiology (AREA)
- Health & Medical Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- General Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Processing Of Solid Wastes (AREA)
- Water Treatment By Sorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Treatment Of Liquids With Adsorbents In General (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
Description
【０００１】
【発明の属する技術分野】
本発明は、産業廃棄物の焼却灰から重金属を簡便かつ効率良く除去する方法に関する。
【０００２】
【従来の技術】
カドミウム、銅、亜鉛、クロム、鉛などの重金属による環境汚染は微量の濃度で生物に毒性を示すため世界中で問題となっている。一方、都市ゴミ、工場ゴミ等に代表される産業廃棄物は、通常焼却場において焼却され、廃棄されている。当該焼却灰中に重金属が含まれている場合には、最終処分場に搬送され処分されている。このように重金属を含む焼却灰は最終処分場に搬送されるだけであり、何ら再利用されていない。
【０００３】
【発明が解決しようとする課題】
従って、本発明の目的は焼却灰中の重金属を簡便かつ効率良く除去し、焼却灰の再利用を促進する方法を提供することにある。
【０００４】
【課題を解決するための手段】
そこで本発明者は、焼却灰中の重金属除去手段について種々検討したところ、従来の重金属の除去手段である凝集沈殿法によっては焼却灰から重金属だけを除去することができないが、焼却灰中の重金属を水溶液中に移行させ、当該水溶液を重金属吸着剤に接触させれば、焼却灰中の重金属が簡便かつ効率良く除去でき、焼却灰がセメントの原料等として使用可能になることを見出し、本発明を完成した。
【０００５】
すなわち、本発明は、産業廃棄物の焼却灰を水に接触させて生じる重金属含有水溶液を、重金属吸着剤に接触させることを特徴とする焼却灰中の重金属除去方法を提供するものである。
【０００６】
【発明の実施の形態】
本発明に用いられる産業廃棄物の焼却灰は、都市ゴミ、工場ゴミ、紙、可燃性プラスチック、木くず、繊維くず、ゴムくず、金属くず、汚泥、廃油、廃酸、廃アルカリ等の産業廃棄物の焼却灰である。産業廃棄物の焼却場は通常図１のように、産業廃棄物をキルンで焼却し、焼却灰は冷却水に導入され、スラリーとして処理される。焼却灰に重金属が含まれる場合は、このスラリーは最終処分場にて処分される。
【０００７】
本発明においては、当該重金属を含有する焼却灰を水に接触させて重金属含有水溶液を生じさせる。Ａｇ、Ｃｄ、Ｃｏ、Ｃｒ、Ｃｕ、Ｆｅ、Ｈｇ、Ｍｎ、Ｎｉ、Ｐｂ、Ｐｄ、Ｚｎ等の重金属は、塩基性領域では水酸化物を生成し、沈殿する。従って、重金属水溶液を生成させるには、水を酸性にする必要がある。すなわち、焼却灰を水に接触させて重金属含有水溶液を生成させるには、焼却灰に水を接触させた後、当該水のpHを酸性側に調節するか、又は酸性側にpHを調節した水を焼却灰に接触させればよい。当該pHは４〜８、特に５〜７とするのが好ましい。pHの調節には、水に塩酸、硫酸、硝酸等の無機酸、クエン酸、しゅう酸、酢酸等の有機酸等を添加すればよい。
【０００８】
得られた重金属含有水溶液を、重金属吸着剤に接触させて重金属を除去する。用いられる重金属吸着剤としては、バイオマス由来重金属吸着剤、イオン交換樹脂、キレート樹脂、活性炭、電解質ゲル等が挙げられる。バイオマス由来重金属吸着剤としては、バクテリア、カビ、酵母等の微生物、海藻及びそれらの死菌体が挙げられる。このうち、微生物死菌体としては、Biotechnol. prog. 1995, 11, 235-250に記載のような重金属吸着性微生物死菌体、例えばバチルス属、カンジダ属、クラドスポリウム属、リゾプス属、サッカロマイセス属、ピキア属、セネデスムス属、ペニシリウム属、アスペルギルス属、トリコデルマ属、アスコフィラム属、フーカス属、アブシディア属、スタフィロコッカス属等に属する重金属吸着性微生物死菌体が好ましい。このうち、バチルス sp．ＫＲＩ−０２又はその類縁菌、バチルス・リケニフォルミス及びスタフィロコッカス ｓｐ．ＫＲＩ−０４又はその類縁菌から選ばれる菌を酸処理して得られる菌体が、アルカリ処理した場合に比べ、当該酸処理によって菌体重量があまり減少せず、菌体単位重量当たりの重金属吸着量が増加することから特に好ましい。バチルス・リケニフォルミスのうち、バチルス・リケニフォルミスＫＲＩ−０３（ＦＥＲＭ ＢＰ−８１６７）及びその類縁株が特に好ましい。スタフィロコッカス sp．ＫＲＩ−０４又はその類縁菌のうち、スタフィロコッカス sp．ＫＲＩ−０４（ＦＥＲＭ ＢＰ−８１６６）及びその類縁株が特に好ましい。ここで類縁株とは、その菌株と同一の種に属し、その菌株と同様な重金属吸着能を有する菌株をいう。
【０００９】
これらの菌の酸処理に用いられる酸としては、これらの菌を死滅させることのできる酸であれば特に制限されないが、塩酸、硫酸、硝酸などの無機酸；酢酸、蟻酸、吉草酸、プロピオン酸、蓚酸、クエン酸等の有機酸が挙げられる。酸処理は、菌が死滅する条件であればよく、例えば菌をpH０．５〜２の酸の水溶液で１５〜１５０分処理するのが好ましい。また、酸処理する時の温度は菌の生育温度が好ましい。なお、酸処理に先立って、菌は水で洗浄しておくのが好ましい。
【００１０】
酸処理後の菌体は、水で洗浄してpHを中性に戻すのが好ましい。酸処理菌体は、水等への懸濁液としてもよいが、凍結乾燥、噴霧乾燥、加熱等の手段で乾燥して用いるのが好ましい。
【００１１】
得られた酸処理菌体は、アルカリ処理菌体に比べて菌体重量の減少が極めて少なく、かつ重金属吸着能は未処理菌体に比べて増大している。従って、酸処理菌体は、未処理生菌体及びアルカリ処理菌体に比べて重金属吸着剤として特に有用である。
【００１２】
また、イオン交換樹脂としては、陽イオン交換樹脂、具体的には強酸性陽イオン交換樹脂及び弱酸性陽イオン交換樹脂が挙げられる。キレート樹脂としてはイミノジ酢酸基、ポリアミン基、Ｎ−メチルグルカミン基、アミドキシム基、アミノリン酸基、ジチオカルバミン酸基、チオ尿素基等のキレート性基を有する樹脂が挙げられる。また電解質ゲルとしては、カルボキシル基、アミノ基、水酸基等を有し、金属結合能を有する電解質ゲルが挙げられる。
【００１３】
これらの重金属吸着剤は、固体担体を含有する形態が好ましい。固体担体としては種々の無機担体及び樹脂担体が挙げられる。
【００１４】
重金属吸着剤を固定化するための無機担体としては、シリカゲル、アルミナ、ガラス、珪藻土、テフロン（登録商標）等が挙げられる。また樹脂担体としてはセルロース、アクリルアミド誘導体、ポリスルホン、ポリビニルアルコール、ポリスチレン、アルギン酸カルシウム、カラゲニン、ポリエチレンイミン等が挙げられる。これら無機担体及び樹脂担体は、それぞれ単独で用いることもできるが、組み合せて用いることもできる。
【００１５】
重金属吸着剤に重金属含有水溶液を接触させる手段としては、重金属含有水溶液を重金属吸着剤に連続して接触させる方法（図２参照）、バッチ処理する方法（図３参照）等が挙げられる。バッチ処理法においては、重金属の吸着効果を高めるための攪拌装置を設けるのが望ましい。
【００１６】
かくして焼却灰中の重金属は、除去される。吸着された重金属は、有機酸、無機酸添加によるpHの低下、ＥＧＴＡ、ＥＤＴＡなどのキレート剤添加等により重金属吸着剤から容易に溶出するので、重金属の回収も可能である。
【００１７】
【実施例】
次に実施例を挙げて本発明をさらに詳細に説明するが、本発明はこれら実施例に何ら限定されない。
【００１８】
実施例１（重金属吸着菌の選択と同定）
（１）重金属吸着菌の選択
土壌を生理食塩水で懸濁後静置し、その上清を１mMの重金属を含むBrain Heart Infusion Agar培地に植え、１日後出現したコロニーを選択した。
【００１９】
（２）得られた菌株の同定
ａ．方法
細菌第一段階試験として、光学顕微鏡Ｕ−ＬＨ１０００（オリンパス，日本）による細胞形態、グラム染色性、胞子の有無、鞭毛による運動性の有無を観察した。Brain Heart Infusion Agar(Becton Dickinson, NJ, U.S.A)＋寒天培地(B. H. I agar)上でのコロニー形態を観察した。カタラーゼ反応、オキシダーゼ反応、ブドウ糖からの酸／ガス産生、ブドウ糖の酸化／発酵（Ｏ／Ｆ）について試験を行った。
細菌第二段階試験として、ＡＰＩシステム(bioMerieux, France: http://www.biomerieux.fr/home#en.htm)を使い、その測定方法に従い生化学的性状試験を実施した。
また、追加試験として生理性状試験を行った。
【００２０】
ｂ．結果
第一段階試験結果を表１に示す。
【００２１】
【表１】
第二段階試験及び追加試験の結果を表２〜４に示す。
【００２３】
【表２】
【表３】
【表４】
以上の結果から、ＫＲＩ−０２はバチルス属に属するが菌種の特定には至らなかった。従って、この菌は、バチルス sp．ＫＲＩ−０２と命名した。また、ＫＲＩ−０３は、バチルス・リケニフォルミスに属すると判断し、バチルス・リケニフォルミス ＫＲＩ−０３と命名した。また、ＫＲＩ−０４は、スタフィロコッカス属に属するが、菌種の特定には至らなかった。従って、この菌はスタフィロコッカス sp．ＫＲＩ−０４と命名した。ＫＲＩ−０２はＦＥＲＭ ＢＰ−８１６５として、ＫＲＩ−０３はＦＥＲＭ ＢＰ−８１６７として、ＫＲＩ−０４はＦＥＲＭ ＢＰ−８１６６として、それぞれ、独立行政法人産業技術総合研究所 特許微生物寄託センターに寄託されている。
【００２７】
実施例２
ＫＲＩ−０２、ＫＲＩ−０３及びＫＲＩ−０４をBrain Heart Infusin培地（Difco）で培養後水で洗浄し、湿重量の５倍容量の０．５Ｎ塩酸を添加して懸濁した。その後、塩酸添加バクテリアは３７℃で２時間振とうした。また、Brierleyらの方法（ＵＳＰ４，９９２，１７９）も比較検討した。すなわち、湿重量の５倍容量の３％水酸化ナトリウムを添加したバクテリアは５０℃または１００℃で１０分振とうした。振とう後、いずれのバクテリアも水で十分洗浄し、凍結乾燥した。その結果、表５に示すように、水で洗浄した場合（未処理）と比べ、酸処理では重量が２０％程度の減少に止まったが、水酸化ナトリウム処理では５０％以上減少し、特に１００℃で処理した場合には６０％以上減少した。
【００２８】
【表５】
実施例３（金属吸着量の測定）
凍結乾燥して得られたバクテリアの粉末を緩衝溶液中（Tris:１００mM）に分散して６０mg／mLの懸濁液を調製した。Tris（１０mM）を用いて２．４mMに調製した重金属水溶液（CdC12、CuSO4、ZnCl2、NiCl2）１mLにバクテリア懸濁液を２０μＬ入れて２時間攪拌した。反応終了後に遠心によって分離した上清中の重金属濃度を原子吸光光度計を用いて測定した。
【００３０】
結果を表６〜９に示す。カドミウムおよび銅の吸着量はＫＲＩ−０２、ＫＲＩ−０３、ＫＲＩ−０４では水洗浄に比べ酸処理により増加した。水酸化ナトリウム処理によってもカドミウムの吸着量はＫＲＩ−０２、ＫＲＩ−０３、ＫＲＩ−０４で増加したが、酸処理のほうが水酸化ナトリウム処理よりも大きかった。亜鉛およびニッケルの吸着量はＫＲＩ−０２、ＫＲＩ−０３、ＫＲＩ−０４で水洗浄に比べ酸処理により増加したが、水酸化ナトリウム処理（１００℃）のほうがわずかに取り込み量が高かった。水酸化ナトリウムの５０℃および１００℃での処理による重金属の取り込み量を比較すると、５０℃より１００℃の処理のほうが吸着量が増加した。
【００３１】
【表６】
【表７】
【表８】
【表９】
実施例４（吸着・溶出試験）
１００mMトリス緩衝液中（pH７．５）に凍結乾燥したバクテリア（ＫＲＩ−０２）を分散して懸濁液（６０mg／mL）を調製した。このバクテリア懸濁液２０μLを、Ｔｒｉｓ（１０mM）を用いて２．４mMに調製した重金属水溶液（CuSO4、NiCl2）１mLに添加し２時間攪拌した（それぞれpH６．０およびpH７．３）。反応終了後遠心分離して上清（ａ）と菌層に分離した。菌層には塩酸（pH１．５４）を加え３０分間攪拌し再度遠心によって上清（ｂ）と菌層に分離した。上清（ａ）、（ｂ）中の重金属濃度は原子吸光光度計を用いて測定し吸着量および脱着量を算出した。塩酸処理後の菌層は１００mM Ｔｒｉｓ（pH７．５）中で洗浄してpHを中性に戻し、重金属の吸着・脱着実験を繰り返した（３回）。結果を図４及び５に示す。いずれの金属も２回目の吸着量は１回目に比べ減少したが、２回目、３回目はほぼ同じ吸着量を示した。脱着量はＣｕの場合は吸着量の９０％以上の良好な値を示した。Ｎｉの場合１回目は少なかったが、２回目、３回目は吸着量とほぼ同じ値を示し、いずれの金属においても再利用可能であることが判明した。
【００３６】
実施例５
図２のように、産業廃棄物焼却施設中にpH調節剤投入部及び重金属吸着剤部を設置し、キルンで生じた焼却灰を冷却水に投入し、pHを５〜６に調節し、その冷却水を重金属吸着剤部を通過させるか、望ましくは攪拌装置を備えたバッチシステム（図３）で処理することにより、水相中の重金属が簡便かつ効率良く除去できる。ここで、重金属吸着剤には、前記実施例２で得られた微生物死菌体が使用できる。
【００３７】
【発明の効果】
産業廃棄物の焼却灰を水に接触させて生じる重金属含有水溶液を、重金属吸着剤に接触させることにより簡便かつ効率的に焼却灰中の重金属を除去することができる。
【図面の簡単な説明】
【図１】現状の産業廃棄物焼却施設の一例を示す図である。
【図２】産業廃棄物焼却施設に重金属吸着剤を設置した装置の一例を示す図である。
【図３】攪拌装置を備えたバッチシステムの重金属吸着剤部の一例を示す図である。
【図４】ＫＲＩ−０２株のＣｕに対する吸着、溶出試験結果を示す図である。
【図５】ＫＲＩ−０２株のＮｉに対する吸着、溶出試験結果を示す図である。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for easily and efficiently removing heavy metals from incinerated ash of industrial waste.
[0002]
[Prior art]
Environmental pollution from heavy metals such as cadmium, copper, zinc, chromium, and lead is a problem worldwide because it is toxic to living organisms at trace concentrations. On the other hand, industrial waste typified by urban garbage, factory garbage, and the like is usually incinerated at an incineration plant and discarded. If heavy metals are contained in the incinerated ash, they are transported to the final disposal site and disposed of. Thus, the incinerated ash containing heavy metals is only transported to the final disposal site and is not reused at all.
[0003]
[Problems to be solved by the invention]
Accordingly, an object of the present invention is to provide a method for easily and efficiently removing heavy metals from incinerated ash and promoting reuse of incinerated ash.
[0004]
[Means for Solving the Problems]
Therefore, the present inventor studied various means for removing heavy metals from incinerated ash. As a result, it was not possible to remove only heavy metals from incinerated ash by the coagulation sedimentation method, which is a conventional means for removing heavy metals. Was transferred to an aqueous solution, and the aqueous solution was brought into contact with a heavy metal adsorbent, heavy metals in the incinerated ash could be easily and efficiently removed, and the incinerated ash could be used as a raw material for cement. Was completed.
[0005]
That is, the present invention provides a method for removing heavy metals in incinerated ash, which comprises contacting a heavy metal-containing aqueous solution produced by contacting incinerated ash of industrial waste with water with a heavy metal adsorbent.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
The incinerated ash of industrial waste used in the present invention is municipal waste, industrial waste, paper, combustible plastic, wood waste, fiber waste, rubber waste, metal waste, sludge, waste oil, waste acid, waste alkali, and other industrial waste. Incineration ash. Industrial waste incineration plants usually incinerate industrial waste in kilns as shown in Fig. 1, and incinerated ash is introduced into cooling water and treated as slurry. If the incinerated ash contains heavy metals, this slurry is disposed of at the final disposal site.
[0007]
In the present invention, the heavy metal-containing incineration ash is brought into contact with water to produce a heavy metal-containing aqueous solution. Heavy metals such as Ag, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb, Pd, and Zn generate hydroxides and precipitate in the basic region. Therefore, it is necessary to make water acidic in order to generate a heavy metal aqueous solution. That is, in order to contact the incineration ash with water to generate a heavy metal-containing aqueous solution, after contacting the incineration ash with water, adjust the pH of the water to an acidic side, or adjust the pH of the water to an acidic side. May be brought into contact with incineration ash. The pH is preferably between 4 and 8, especially between 5 and 7. The pH may be adjusted by adding an inorganic acid such as hydrochloric acid, sulfuric acid or nitric acid, or an organic acid such as citric acid, oxalic acid or acetic acid to water.
[0008]
The obtained heavy metal-containing aqueous solution is brought into contact with a heavy metal adsorbent to remove heavy metals. Examples of the heavy metal adsorbent used include a biomass-derived heavy metal adsorbent, an ion exchange resin, a chelate resin, activated carbon, and an electrolyte gel. Examples of the biomass-derived heavy metal adsorbent include microorganisms such as bacteria, molds, and yeasts, seaweeds, and dead cells thereof. Among them, the dead microorganism cells include, as described in Biotechnol.prog. 1995, 11, 235-250, dead metal-adsorbing microorganism dead cells, for example, Bacillus, Candida, Cladosporium, Rhizopus, Saccharomyces Preferred is a dead metal-adsorbing microorganism belonging to the genus, Pichia, Synedesmus, Penicillium, Aspergillus, Trichoderma, Ascophyllum, Fucus, Absididia, Staphylococcus, or the like. Of these, Bacillus sp. KRI-02 or its relatives, Bacillus licheniformis and Staphylococcus sp. Bacterial cells obtained by acid-treating a bacterium selected from KRI-04 or a related bacterium are not significantly reduced in cell weight by the acid treatment as compared with the case of alkali treatment, and heavy metal adsorption per cell unit weight It is particularly preferred because the amount increases. Among Bacillus licheniformis, Bacillus licheniformis KRI-03 (FERM BP-8167) and related strains are particularly preferable. Staphylococcus sp. Among KRI-04 or its relatives, Staphylococcus sp. KRI-04 (FERM BP-8166) and its relatives are particularly preferred. Here, the related strain refers to a strain belonging to the same species as the strain and having the same heavy metal adsorption ability as the strain.
[0009]
The acid used for acid treatment of these bacteria is not particularly limited as long as it is an acid capable of killing these bacteria, but inorganic acids such as hydrochloric acid, sulfuric acid, and nitric acid; acetic acid, formic acid, valeric acid, propionic acid Oxalic acid, citric acid and the like. The acid treatment may be any condition under which the bacteria are killed. For example, it is preferable to treat the bacteria with an aqueous solution of an acid having a pH of 0.5 to 2 for 15 to 150 minutes. The temperature at the time of the acid treatment is preferably the growth temperature of the bacteria. It is preferable that the bacteria be washed with water before the acid treatment.
[0010]
The cells after acid treatment are preferably washed with water to return the pH to neutral. The acid-treated microbial cells may be used as a suspension in water or the like, but it is preferable to use them after drying by means such as freeze-drying, spray-drying, and heating.
[0011]
The obtained acid-treated cells have a very small decrease in the cell weight as compared with the alkali-treated cells, and the heavy metal adsorption ability is increased as compared with the untreated cells. Therefore, the acid-treated cells are particularly useful as a heavy metal adsorbent as compared with untreated viable cells and alkali-treated cells.
[0012]
In addition, examples of the ion exchange resin include a cation exchange resin, specifically, a strongly acidic cation exchange resin and a weakly acidic cation exchange resin. Examples of the chelating resin include resins having a chelating group such as an iminodiacetic acid group, a polyamine group, an N-methylglucamine group, an amidoxime group, an aminophosphate group, a dithiocarbamic acid group, and a thiourea group. Examples of the electrolyte gel include an electrolyte gel having a carboxyl group, an amino group, a hydroxyl group, and the like and having a metal binding ability.
[0013]
These heavy metal adsorbents preferably have a form containing a solid carrier. Examples of the solid carrier include various inorganic carriers and resin carriers.
[0014]
Examples of the inorganic carrier for immobilizing the heavy metal adsorbent include silica gel, alumina, glass, diatomaceous earth, and Teflon (registered trademark). Examples of the resin carrier include cellulose, acrylamide derivatives, polysulfone, polyvinyl alcohol, polystyrene, calcium alginate, carrageenin, and polyethyleneimine. These inorganic carriers and resin carriers can be used alone or in combination.
[0015]
Means for bringing the heavy metal-containing aqueous solution into contact with the heavy metal adsorbent include a method of continuously bringing the heavy metal-containing aqueous solution into contact with the heavy metal adsorbent (see FIG. 2), a method of performing a batch treatment (see FIG. 3), and the like. In the batch processing method, it is desirable to provide a stirrer for increasing the effect of adsorbing heavy metals.
[0016]
Thus, heavy metals in the incineration ash are removed. The adsorbed heavy metal is easily eluted from the heavy metal adsorbent by lowering the pH by adding an organic acid or an inorganic acid, or by adding a chelating agent such as EGTA, EDTA, etc., so that the heavy metal can be recovered.
[0017]
【Example】
Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.
[0018]
Example 1 (Selection and identification of heavy metal-adsorbing bacteria)
(1) Selection of heavy metal-adsorbed bacteria The soil was suspended in physiological saline and allowed to stand. The supernatant was inoculated on a Brain Heart Infusion Agar medium containing 1 mM heavy metal, and colonies that appeared one day later were selected.
[0019]
(2) Identification of the obtained strain a. Method As a first stage test of bacteria, cell morphology, Gram stainability, presence or absence of spores, and presence or absence of motility by flagella were observed using an optical microscope U-LH1000 (Olympus, Japan). Colony morphology was observed on Brain Heart Infusion Agar (Becton Dickinson, NJ, USA) + agar medium (BHI agar). Tests were performed on catalase reaction, oxidase reaction, acid / gas production from glucose, and glucose oxidation / fermentation (O / F).
As a second stage test of bacteria, a biochemical property test was performed using an API system (bioMerieux, France: http://www.biomerieux.fr/home#en.htm) according to the measurement method.
In addition, a physiological property test was performed as an additional test.
[0020]
b. Results The results of the first stage test are shown in Table 1.
[0021]
[Table 1]
Tables 2 to 4 show the results of the second stage test and the additional test.
[0023]
[Table 2]
[Table 3]
[Table 4]
From the above results, KRI-02 belongs to the genus Bacillus, but did not determine the bacterial species. Therefore, this bacterium is Bacillus sp. It was named KRI-02. Further, KRI-03 was determined to belong to Bacillus licheniformis, and was named Bacillus licheniformis KRI-03. Further, KRI-04 belongs to the genus Staphylococcus, but did not lead to the identification of the bacterial species. Therefore, this bacterium is Staphylococcus sp. It was named KRI-04. KRI-02 has been deposited as FERM BP-8165, KRI-03 has been deposited as FERM BP-8167, and KRI-04 has been deposited as FERM BP-8166 at the Patent Microorganisms Depositary of the National Institute of Advanced Industrial Science and Technology.
[0027]
Example 2
KRI-02, KRI-03 and KRI-04 were cultured in Brain Heart Infusin medium (Difco), washed with water, and suspended by adding 0.5N hydrochloric acid in a volume 5 times the wet weight. Thereafter, the bacteria added with hydrochloric acid were shaken at 37 ° C. for 2 hours. The method of Brierley et al. (US Pat. No. 4,992,179) was also compared. That is, the bacteria to which 5% by volume of the wet weight of 3% sodium hydroxide was added were shaken at 50 ° C. or 100 ° C. for 10 minutes. After shaking, all bacteria were sufficiently washed with water and freeze-dried. As a result, as shown in Table 5, the weight was only reduced by about 20% in the acid treatment as compared with the case of washing with water (untreated), but decreased by 50% or more in the sodium hydroxide treatment, particularly 100%. When treated at ℃, it decreased by more than 60%.
[0028]
[Table 5]
Example 3 (Measurement of metal adsorption amount)
Bacterial powder obtained by freeze-drying was dispersed in a buffer solution (Tris: 100 mM) to prepare a 60 mg / mL suspension. 20 μL of the bacterial suspension was added to 1 mL of a heavy metal aqueous solution (CdC 12 , CuSO 4 , ZnCl 2 , NiCl 2 ) adjusted to 2.4 mM using Tris (10 mM) and stirred for 2 hours. After completion of the reaction, the concentration of heavy metals in the supernatant separated by centrifugation was measured using an atomic absorption spectrophotometer.
[0030]
The results are shown in Tables 6-9. The amounts of cadmium and copper adsorbed by KRI-02, KRI-03, and KRI-04 were increased by the acid treatment as compared with water washing. The amount of cadmium adsorbed by sodium hydroxide treatment also increased with KRI-02, KRI-03, and KRI-04, but the acid treatment was larger than the sodium hydroxide treatment. The adsorption amount of zinc and nickel increased by acid treatment in KRI-02, KRI-03, and KRI-04 compared to water washing, but the uptake amount was slightly higher in sodium hydroxide treatment (100 ° C.). Comparing the amount of heavy metal taken in by the treatment of sodium hydroxide at 50 ° C. and 100 ° C., the amount of adsorption increased at 50 ° C. than at 100 ° C.
[0031]
[Table 6]
[Table 7]
[Table 8]
[Table 9]
Example 4 (adsorption / elution test)
Lyophilized bacteria (KRI-02) were dispersed in 100 mM Tris buffer (pH 7.5) to prepare a suspension (60 mg / mL). 20 μL of this bacterial suspension was added to 1 mL of a heavy metal aqueous solution (CuSO 4 , NiCl 2 ) adjusted to 2.4 mM using Tris (10 mM) and stirred for 2 hours (pH 6.0 and pH 7.3, respectively). After completion of the reaction, the mixture was centrifuged to separate the supernatant (a) and the bacterial layer. Hydrochloric acid (pH 1.54) was added to the bacterial layer, stirred for 30 minutes, and centrifuged again to separate the supernatant (b) and the bacterial layer. The concentrations of heavy metals in the supernatants (a) and (b) were measured using an atomic absorption spectrophotometer, and the amounts of adsorption and desorption were calculated. The bacterial layer after the hydrochloric acid treatment was washed in 100 mM Tris (pH 7.5) to return the pH to neutral, and the experiment for adsorption and desorption of heavy metals was repeated (3 times). The results are shown in FIGS. For all metals, the amount of adsorption in the second time decreased compared to the first time, but the second and third times showed almost the same amount of adsorption. In the case of Cu, the desorption amount showed a good value of 90% or more of the adsorption amount. In the case of Ni, the first time was small, but the second time and the third time showed almost the same value as the adsorption amount, indicating that any metal can be reused.
[0036]
Example 5
As shown in FIG. 2, a pH adjuster input section and a heavy metal adsorbent section are installed in an industrial waste incineration facility, and incineration ash generated in the kiln is injected into cooling water to adjust the pH to 5 to 6, The heavy metal in the aqueous phase can be easily and efficiently removed by passing the cooling water through the heavy metal adsorbent section or desirably treating it with a batch system (FIG. 3) equipped with a stirrer. Here, the dead microorganism cells obtained in Example 2 can be used as the heavy metal adsorbent.
[0037]
【The invention's effect】
The heavy metal in the incinerated ash can be easily and efficiently removed by contacting the heavy metal-containing aqueous solution generated by contacting the incinerated ash of the industrial waste with water with the heavy metal adsorbent.
[Brief description of the drawings]
FIG. 1 is a diagram showing an example of a current industrial waste incineration facility.
FIG. 2 is a diagram illustrating an example of an apparatus in which a heavy metal adsorbent is installed in an industrial waste incineration facility.
FIG. 3 is a diagram showing an example of a heavy metal adsorbent section of a batch system provided with a stirring device.
FIG. 4 is a graph showing the results of an adsorption and elution test of KRI-02 strain on Cu.
FIG. 5 is a graph showing the results of an adsorption and dissolution test of KRI-02 strain on Ni.
Claims (6)
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002377524A JP2004202449A (en) | 2002-12-26 | 2002-12-26 | Method for removing heavy metal in incineration ash |
| CA2509108A CA2509108C (en) | 2002-12-26 | 2003-12-25 | Method for removing heavy metals in incineration ash |
| CNB200380107371XA CN100540162C (en) | 2002-12-26 | 2003-12-25 | Method for removing heavy metals from incineration ash |
| KR1020057008301A KR101080894B1 (en) | 2002-12-26 | 2003-12-25 | Method for removing heavy metal in incineration ash |
| JP2004562944A JPWO2004058423A1 (en) | 2002-12-26 | 2003-12-25 | Method for removing heavy metals from incineration ash |
| AU2003292829A AU2003292829A1 (en) | 2002-12-26 | 2003-12-25 | Method for removing heavy metal in incineration ash |
| PCT/JP2003/016784 WO2004058423A1 (en) | 2002-12-26 | 2003-12-25 | Method for removing heavy metal in incineration ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002377524A JP2004202449A (en) | 2002-12-26 | 2002-12-26 | Method for removing heavy metal in incineration ash |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2004202449A true JP2004202449A (en) | 2004-07-22 |
Family
ID=32677397
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002377524A Pending JP2004202449A (en) | 2002-12-26 | 2002-12-26 | Method for removing heavy metal in incineration ash |
| JP2004562944A Pending JPWO2004058423A1 (en) | 2002-12-26 | 2003-12-25 | Method for removing heavy metals from incineration ash |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2004562944A Pending JPWO2004058423A1 (en) | 2002-12-26 | 2003-12-25 | Method for removing heavy metals from incineration ash |
Country Status (6)
| Country | Link |
|---|---|
| JP (2) | JP2004202449A (en) |
| KR (1) | KR101080894B1 (en) |
| CN (1) | CN100540162C (en) |
| AU (1) | AU2003292829A1 (en) |
| CA (1) | CA2509108C (en) |
| WO (1) | WO2004058423A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007122720A1 (en) * | 2006-04-21 | 2007-11-01 | Kazuhiro Niisawa | Method of metal recovery |
| JP2010284607A (en) * | 2009-06-12 | 2010-12-24 | Toshiba Corp | Phosphorus adsorbent and system for recovering phosphorus |
| WO2011018977A1 (en) * | 2009-08-11 | 2011-02-17 | 太平洋セメント株式会社 | Organic sludge drying system and drying method |
| WO2011018976A1 (en) * | 2009-08-11 | 2011-02-17 | 太平洋セメント株式会社 | Organic sludge drying system and drying method |
| JP2014012272A (en) * | 2012-06-07 | 2014-01-23 | Tokyo Metropolitan Industrial Technology Research Institute | Heavy metal adsorbent, and heavy metal recovery method |
| JP2014155902A (en) * | 2013-02-15 | 2014-08-28 | Sanai Fujita | Method and plant for treating incineration ash of garbage and sewage sludge |
| CN111872027A (en) * | 2020-07-16 | 2020-11-03 | 常熟理工学院 | Method for co-processing waste incineration fly ash and printing and dyeing waste liquid |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015006178A (en) * | 2013-06-05 | 2015-01-15 | ヴァーレ、ソシエダージ、アノニマＶａｌｅ Ｓ．Ａ． | Process for obtaining copper nanoparticles from a fungus selected from hypocrea lixii and trichoderma koningiopsis, and use of the fungus selected from hypocrea lixii and trichoderma koningiopsis in bioremediation of waste water and production of copper nanoparticles |
| JP2015027288A (en) * | 2013-06-05 | 2015-02-12 | ヴァーレ、ソシエダージ、アノニマＶａｌｅ Ｓ．Ａ． | Method for obtaining copper nanoparticles from rhodotorula mucilaginosa, bioremediation of waste water, and usage of rhodotorula mucilaginosa in production of copper nanoparticles |
| CN110813990B (en) * | 2019-11-15 | 2021-12-03 | 斯蒂芬·Y·周 | Advanced oxidation and packaging fixation treatment method for solid waste incineration fly ash |
| CN111842310B (en) * | 2020-07-22 | 2021-11-30 | 浙江农林大学 | Biomass gradient deliming pretreatment method |
| KR102446284B1 (en) * | 2020-09-28 | 2022-09-26 | 한국에너지기술연구원 | System and Method for generating H2 using fly ash |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5130390B2 (en) * | 1973-03-26 | 1976-08-31 | ||
| JPS49131984A (en) * | 1973-04-25 | 1974-12-18 | ||
| JPS5051481A (en) * | 1973-09-07 | 1975-05-08 | ||
| JPS5051988A (en) * | 1973-09-10 | 1975-05-09 | ||
| JPS61101711A (en) * | 1984-10-24 | 1986-05-20 | Hirochika Okuyama | Method for making incinerated ash harmless |
| US5055402A (en) * | 1989-01-04 | 1991-10-08 | Bio-Recovery Systems, Inc. | Removal of metal ions with immobilized metal ion-binding microorganisms |
| KR920701427A (en) * | 1989-10-18 | 1992-08-11 | 원본미기재 | Polymer Beads Containing Fixed Metal Extraction Solvents |
| JPH0823974A (en) * | 1994-07-18 | 1996-01-30 | Kuraray Co Ltd | Production of gel holding immobilized biocatalyst |
| JPH11199227A (en) * | 1998-01-16 | 1999-07-27 | Toshiba Plant Kensetsu Co Ltd | Method for recovering chemical raw material from fly ash |
| JP5105679B2 (en) * | 2001-09-28 | 2012-12-26 | 日本エンバイロケミカルズ株式会社 | Method for producing carrier for water treatment |
-
2002
- 2002-12-26 JP JP2002377524A patent/JP2004202449A/en active Pending
-
2003
- 2003-12-25 AU AU2003292829A patent/AU2003292829A1/en not_active Abandoned
- 2003-12-25 CA CA2509108A patent/CA2509108C/en not_active Expired - Fee Related
- 2003-12-25 JP JP2004562944A patent/JPWO2004058423A1/en active Pending
- 2003-12-25 WO PCT/JP2003/016784 patent/WO2004058423A1/en active Application Filing
- 2003-12-25 KR KR1020057008301A patent/KR101080894B1/en not_active IP Right Cessation
- 2003-12-25 CN CNB200380107371XA patent/CN100540162C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007122720A1 (en) * | 2006-04-21 | 2007-11-01 | Kazuhiro Niisawa | Method of metal recovery |
| JP2010284607A (en) * | 2009-06-12 | 2010-12-24 | Toshiba Corp | Phosphorus adsorbent and system for recovering phosphorus |
| WO2011018977A1 (en) * | 2009-08-11 | 2011-02-17 | 太平洋セメント株式会社 | Organic sludge drying system and drying method |
| WO2011018976A1 (en) * | 2009-08-11 | 2011-02-17 | 太平洋セメント株式会社 | Organic sludge drying system and drying method |
| JP2014012272A (en) * | 2012-06-07 | 2014-01-23 | Tokyo Metropolitan Industrial Technology Research Institute | Heavy metal adsorbent, and heavy metal recovery method |
| JP2014155902A (en) * | 2013-02-15 | 2014-08-28 | Sanai Fujita | Method and plant for treating incineration ash of garbage and sewage sludge |
| CN111872027A (en) * | 2020-07-16 | 2020-11-03 | 常熟理工学院 | Method for co-processing waste incineration fly ash and printing and dyeing waste liquid |
| CN111872027B (en) * | 2020-07-16 | 2021-09-07 | 常熟理工学院 | Method for co-processing waste incineration fly ash and printing and dyeing waste liquid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1732053A (en) | 2006-02-08 |
| KR101080894B1 (en) | 2011-11-07 |
| JPWO2004058423A1 (en) | 2006-04-27 |
| CA2509108A1 (en) | 2004-07-15 |
| CN100540162C (en) | 2009-09-16 |
| KR20050086484A (en) | 2005-08-30 |
| CA2509108C (en) | 2011-11-15 |
| AU2003292829A1 (en) | 2004-07-22 |
| WO2004058423A1 (en) | 2004-07-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Yang et al. | Enhanced biosorption of Cr (VI) from synthetic wastewater using algal-bacterial aerobic granular sludge: Batch experiments, kinetics and mechanisms | |
| Arivalagan et al. | Removal of cadmium from aqueous solution by batch studies using Bacillus cereus | |
| Mangaiyarkarasi et al. | Bioreduction of Cr (VI) by alkaliphilic Bacillus subtilis and interaction of the membrane groups | |
| Congeevaram et al. | Biosorption of chromium and nickel by heavy metal resistant fungal and bacterial isolates | |
| Kumar et al. | Biosorption of chromium (VI) from aqueous solution and electroplating wastewater using fungal biomass | |
| López et al. | Nickel biosorption by free and immobilized cells of Pseudomonas fluorescens 4F39: a comparative study | |
| Hussein et al. | Isolation and characterization of Pseudomonas resistant to heavy metals contaminants | |
| JP4478022B2 (en) | Heavy metal adsorbent composition | |
| US8748153B2 (en) | Biosorbents for the extraction of metals | |
| Abdel-Monem et al. | Biosorption of nickel by Pseudomonas cepacia 120S and Bacillus subtilis 117S | |
| JP2004202449A (en) | Method for removing heavy metal in incineration ash | |
| JP2008104361A (en) | Method for denitrification in presence of salt | |
| CN109110863A (en) | Utilize the method for fortimicin in chemical activation/micro-wave digestion activation biological carbon materials removal water body | |
| Deepa et al. | Application of co-immobilized microbial biochar beads in hybrid biofilter towards effective treatment of chrome tanning wastewater | |
| CN113072164B (en) | Activated carbon for enhancing Fenton-like reaction removal efficiency and preparation and use methods thereof | |
| Busnelli et al. | Copper removal mediated by Pseudomonas veronii 2E in batch and continuous reactors | |
| Kumaran et al. | ABSORPTION STUDIES ON HEAVY METALS BY ISOLATED BACTERIAL STRAIN (PSEUDOMONAS Sp.) FROM UPPANAR ESTUARINE WATER, SOUTHEAST COAST OF INDIA. | |
| CN114410693B (en) | Biological iron-manganese oxide, preparation method thereof and application thereof in simultaneous removal of arsenic and antimony in wastewater | |
| JP3406631B2 (en) | Activated carbon immobilized with microbial cells, its production method and use | |
| JP2001225095A (en) | Method for treatment of environmental pollutant substance | |
| Ojoawo et al. | Bioremediation of Zn, Cu, Mg and Pb in Fresh Domestic Sewage by Brevibacterium sp. | |
| Zouboulis et al. | Heavy metals removal from industrial wastewaters by biosorption | |
| Khalil et al. | Biosorption of trivalent chromium using Ca-alginate immobilized and alkali-treated biomass | |
| JP2005261234A (en) | New microorganism and method for removing arsenic by microorganism | |
| Ponia et al. | International Journal of Current Microbiology and Applied Sciences |