JP5976416B2 - 土工材料 - Google Patents
土工材料 Download PDFInfo
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- JP5976416B2 JP5976416B2 JP2012141149A JP2012141149A JP5976416B2 JP 5976416 B2 JP5976416 B2 JP 5976416B2 JP 2012141149 A JP2012141149 A JP 2012141149A JP 2012141149 A JP2012141149 A JP 2012141149A JP 5976416 B2 JP5976416 B2 JP 5976416B2
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- cao
- calcium aluminate
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- 239000000463 material Substances 0.000 title claims description 49
- 238000010828 elution Methods 0.000 claims description 46
- 239000013049 sediment Substances 0.000 claims description 46
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 41
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims description 41
- 239000002689 soil Substances 0.000 claims description 32
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 21
- 229910052796 boron Inorganic materials 0.000 claims description 21
- 229910052731 fluorine Inorganic materials 0.000 claims description 21
- 239000011737 fluorine Substances 0.000 claims description 21
- 229910052785 arsenic Inorganic materials 0.000 claims description 20
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims description 20
- 230000002378 acidificating effect Effects 0.000 claims description 13
- 229910000318 alkali metal phosphate Inorganic materials 0.000 claims description 12
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 12
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 11
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 11
- 230000007613 environmental effect Effects 0.000 claims description 11
- 239000004571 lime Substances 0.000 claims description 11
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical group [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 claims description 8
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 claims description 4
- 239000011575 calcium Substances 0.000 claims description 4
- 229910000160 potassium phosphate Inorganic materials 0.000 claims description 4
- 235000011009 potassium phosphates Nutrition 0.000 claims description 4
- 229910052711 selenium Inorganic materials 0.000 claims description 4
- 239000011669 selenium Substances 0.000 claims description 4
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- 150000004645 aluminates Chemical class 0.000 claims description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 85
- 239000000292 calcium oxide Substances 0.000 description 44
- 235000012255 calcium oxide Nutrition 0.000 description 44
- 238000000034 method Methods 0.000 description 34
- 239000000126 substance Substances 0.000 description 25
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 19
- 229910001385 heavy metal Inorganic materials 0.000 description 17
- 239000000203 mixture Substances 0.000 description 14
- 239000002245 particle Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- 239000000843 powder Substances 0.000 description 8
- 230000002265 prevention Effects 0.000 description 8
- 238000001816 cooling Methods 0.000 description 7
- 230000003405 preventing effect Effects 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 238000004090 dissolution Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000003916 acid precipitation Methods 0.000 description 4
- 239000002956 ash Substances 0.000 description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 4
- 239000000920 calcium hydroxide Substances 0.000 description 4
- 235000011116 calcium hydroxide Nutrition 0.000 description 4
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 4
- 239000004927 clay Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 231100000614 poison Toxicity 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- 230000001629 suppression Effects 0.000 description 4
- 239000003440 toxic substance Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 3
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 150000002505 iron Chemical class 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- -1 aluminum sulfate Chemical class 0.000 description 2
- 229910052793 cadmium Inorganic materials 0.000 description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-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
- 230000008859 change Effects 0.000 description 2
- PPQREHKVAOVYBT-UHFFFAOYSA-H dialuminum;tricarbonate Chemical compound [Al+3].[Al+3].[O-]C([O-])=O.[O-]C([O-])=O.[O-]C([O-])=O PPQREHKVAOVYBT-UHFFFAOYSA-H 0.000 description 2
- 239000012990 dithiocarbamate Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 2
- 235000019796 monopotassium phosphate Nutrition 0.000 description 2
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000012085 test solution Substances 0.000 description 2
- 238000004017 vitrification Methods 0.000 description 2
- 238000004056 waste incineration Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 239000003513 alkali 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
- 229940118662 aluminum carbonate Drugs 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 235000008429 bread Nutrition 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 230000033444 hydroxylation Effects 0.000 description 1
- 238000005805 hydroxylation reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 230000007774 longterm Effects 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
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000012488 sample solution Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Description
しかし、これらの方法では不溶化の効果が低いため、底質からのこれらの有害物質の溶出量を前記土壌環境基準以下に抑制することは困難であった。
底質とは異なるが、不溶化処理した汚染土壌において重金属等の有害物質が溶出する環境条件としては、pHが最も重要な要因であることが既往の調査結果から明らかになっている。pH変化に対する重金属等の溶出挙動については、重金属等で汚染した土壌を不溶化処理したものについて、pH4.0 の酸性雨に年間降雨量2,000mm で100 年間曝された場合を考慮した評価試験方法が社団法人土壌環境センターより提案されており(GEPC技術標準TS-02-S1 重金属等不溶化処理土壌のpH変化に対する安定性の相対的評価方法)、不溶化処理した底質についても、このような酸性環境下での重金属等の溶出を防止する必要がある。
[2](B)カルシウムアルミネートが、CaOとAl2O3が等モル比の結晶質カルシウムアルミネートと、CaOとAl2O3の含有モル比がCaO/Al2O3=1.6〜2.6の非晶質カルシウムアルミネートとを100:15〜100:120の質量比で含むものである[1]に記載の土工材料。
[3](E)アルカリ金属リン酸塩が、リン酸カリウムである[1]又は[2]に記載の土工材料。
[4]ふっ素、ほう素、砒素及びセレンの酸性環境下における溶出量が土壌環境基準以下に抑制されたものである[1]〜[3]のいずれかに記載の土工材料。
KH2PO4 (2)
K3PO4 (3)
表2に示す粒度構成、含水率、強熱減量の海底浚渫土を使用した。この底質について、社団法人土壌環境センターの技術標準(GEPC TS−02−S1:重金属等不溶化処理土壌のpH変化に対する安定性の相対的評価方法)に準じた方法で測定した酸性環境下でのふっ素、ほう素、砒素及び鉛の溶出量を表3に示す。
CaO源に石灰石(CaO含有量;56質量%)、Al2O3源にバン土頁岩(Al2O3含有量;88質量%)のそれぞれ粗砕粒(粒径約1mm以下)を用い、以下のA1〜A6で表すカルシウムアルミネートの粉末を作製した。その作製方法は、CaO源とAl2O3源を所定のモル比に配合したものを、電気炉で1800℃(±50℃)に加熱し、60分間保持した後、加熱を停止して炉内で自然放冷して得た(B1〜B3)。同様に1800℃(±50℃)に加熱し、60分間保持した後、温度1800℃の電気炉から加熱物を常温下に取り出し、取り出し後は直ちに加熱物表面に流量約100cc/秒で窒素ガスを吹き付けて急冷して得た(B4〜B6)。得られた冷却物はボールミルで粉砕し、ブレーン比表面積が5000±500cm2/gとなるよう粉砕時間を変えて粉末度を調整した。
B1;CaO/Al2O3=モル比1.0の結晶質カルシウムアルミネート
B2;CaO/Al2O3=モル比1.7の結晶質カルシウムアルミネート
B3;CaO/Al2O3=モル比0.5の結晶質カルシウムアルミネート
B4;CaO/Al2O3=モル比1.7の非晶質カルシウムアルミネート
B5;CaO/Al2O3=モル比2.3の非晶質カルシウムアルミネート
B6;CaO/Al2O3=モル比2.9のガラス化率10%のカルシウムアルミネート
(D)酸化カルシウム:関東化学社製 粉末試薬
(E)リン酸二水素カリウム:関東化学社製 粉末試薬
(A)底質に表4の溶出防止成分を表6に示す配合割合で配合し、本発明の土工材料および比較品の土工材料を作成した。次に、該土工材料100質量部に対して水を60質量部加え、モルタルミキサーで3分間混合して混合物を調整した。該混合物をビニール袋内に封入して20℃の温度で養生し、養生期間1、7日経過後に、社団法人土壌環境センターの技術標準(GEPC TS−02−S1:重金属等不溶化処理土壌のpH変化に対する安定性の相対的評価方法)に準じた方法で、酸性環境下でのふっ素、ほう素、砒素及び鉛の溶出量を測定した。溶出量の測定結果を表6に示す。
(1)所定期間養生後の試料を粗砕し、ふるい2mm通過分を採取混合する。
(2)容積1000mLのポリ容器に試料50gを計りとり、溶媒として硫酸水溶液(0.769mmol/L)500gを加え、振とう機(振とう回数200回/分)で6時間振とうする。
(3)ポリ容器を30分静置した後、試料液の上澄みを孔径0.45μmのメンブレンフィルターでろ過して検液とする。
(4)採取した検液の成分を表5に示す方法で測定する。
Claims (4)
- (A)ふっ素、ほう素、砒素及びセレンから選ばれる1種以上の酸性環境下における溶出量が土壌環境基準を超える底質、(B)CaOとAl 2 O 3 が等モル比の結晶質カルシウムアルミネートと、CaOとAl 2 O 3 の含有モル比がCaO/Al 2 O 3 =1.6〜2.6の非晶質カルシウムアルミネートとを含むカルシウムアルミネート、(C)硫酸アルミニウム、(D)石灰、及び(E)アルカリ金属リン酸塩を含有する土工材料。
- (B)カルシウムアルミネートが、CaOとAl2O3が等モル比の結晶質カルシウムアルミネートと、CaOとAl2O3の含有モル比がCaO/Al2O3=1.6〜2.6の非晶質カルシウムアルミネートとを100:15〜100:120の質量比で含むものである請求項1に記載の土工材料。
- (E)アルカリ金属リン酸塩が、リン酸カリウムである請求項1又は2に記載の土工材料。
- ふっ素、ほう素、砒素及びセレンの酸性環境下における溶出量が土壌環境基準以下に抑制されたものである請求項1〜3のいずれか1項記載の土工材料。
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JP5976416B2 true JP5976416B2 (ja) | 2016-08-23 |
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Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6054799A (ja) * | 1983-09-05 | 1985-03-29 | Ootosetsuto:Kk | 含水物の処理剤 |
JP4092836B2 (ja) * | 1999-12-17 | 2008-05-28 | 栗田工業株式会社 | 焼却灰及び/又は焼却飛灰の重金属溶出防止処理方法 |
JP4990865B2 (ja) * | 2001-11-30 | 2012-08-01 | 松田技研工業株式会社 | 土壌用固化不溶化剤および土壌処理方法 |
JP3919648B2 (ja) * | 2002-10-16 | 2007-05-30 | 電気化学工業株式会社 | 有害重金属捕集材 |
JP2004141774A (ja) * | 2002-10-24 | 2004-05-20 | Kurita Water Ind Ltd | 土壌又は底質の浄化方法 |
JP2009072657A (ja) * | 2007-09-19 | 2009-04-09 | Jikco Ltd | 土壌、土壌スラリー中の重金属類の処理方法 |
JP2011136885A (ja) * | 2009-12-28 | 2011-07-14 | Taiheiyo Materials Corp | 低温用速硬材及びこれを含むセメント含有材料 |
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