CN113181917B - 活化过硫酸盐的黏土矿物基催化剂及其制备方法和应用 - Google Patents
活化过硫酸盐的黏土矿物基催化剂及其制备方法和应用 Download PDFInfo
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- CN113181917B CN113181917B CN202110443138.9A CN202110443138A CN113181917B CN 113181917 B CN113181917 B CN 113181917B CN 202110443138 A CN202110443138 A CN 202110443138A CN 113181917 B CN113181917 B CN 113181917B
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- Prior art keywords
- persulfate
- clay mineral
- based catalyst
- solid mixture
- washing
- Prior art date
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- 239000003054 catalyst Substances 0.000 title claims abstract description 75
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 title claims abstract description 43
- 239000002734 clay mineral Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 58
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 51
- 239000008247 solid mixture Substances 0.000 claims abstract description 36
- 238000005406 washing Methods 0.000 claims abstract description 33
- 238000003756 stirring Methods 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000001035 drying Methods 0.000 claims abstract description 23
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 16
- 230000003213 activating effect Effects 0.000 claims abstract description 13
- 239000002253 acid Substances 0.000 claims abstract description 9
- 229910052723 transition metal Inorganic materials 0.000 claims abstract description 9
- 239000011259 mixed solution Substances 0.000 claims abstract description 8
- 230000007935 neutral effect Effects 0.000 claims abstract description 8
- 239000002002 slurry Substances 0.000 claims abstract description 8
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 7
- -1 transition metal salt Chemical class 0.000 claims abstract description 5
- 230000015556 catabolic process Effects 0.000 claims description 17
- 238000006731 degradation reaction Methods 0.000 claims description 17
- 239000012425 OXONE® Substances 0.000 claims description 11
- HJKYXKSLRZKNSI-UHFFFAOYSA-I pentapotassium;hydrogen sulfate;oxido sulfate;sulfuric acid Chemical compound [K+].[K+].[K+].[K+].[K+].OS([O-])(=O)=O.[O-]S([O-])(=O)=O.OS(=O)(=O)O[O-].OS(=O)(=O)O[O-] HJKYXKSLRZKNSI-UHFFFAOYSA-I 0.000 claims description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000012298 atmosphere Substances 0.000 claims description 7
- 239000002957 persistent organic pollutant Substances 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 4
- XMEVHPAGJVLHIG-FMZCEJRJSA-N chembl454950 Chemical compound [Cl-].C1=CC=C2[C@](O)(C)[C@H]3C[C@H]4[C@H]([NH+](C)C)C(O)=C(C(N)=O)C(=O)[C@@]4(O)C(O)=C3C(=O)C2=C1O XMEVHPAGJVLHIG-FMZCEJRJSA-N 0.000 claims description 4
- 229960004989 tetracycline hydrochloride Drugs 0.000 claims description 4
- 150000003624 transition metals Chemical class 0.000 claims description 4
- 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 claims description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 3
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- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 claims description 3
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- 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 claims description 3
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- 229910052748 manganese Inorganic materials 0.000 claims description 3
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- 229910052625 palygorskite Inorganic materials 0.000 claims description 3
- 238000005554 pickling Methods 0.000 claims description 3
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 3
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 claims description 3
- 229940043267 rhodamine b Drugs 0.000 claims description 3
- 229910052624 sepiolite Inorganic materials 0.000 claims description 3
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- 239000005720 sucrose Substances 0.000 claims description 3
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- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 claims description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 2
- HPTYUNKZVDYXLP-UHFFFAOYSA-N aluminum;trihydroxy(trihydroxysilyloxy)silane;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O[Si](O)(O)O HPTYUNKZVDYXLP-UHFFFAOYSA-N 0.000 claims description 2
- 150000001450 anions Chemical class 0.000 claims description 2
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 229910052621 halloysite Inorganic materials 0.000 claims description 2
- 239000001307 helium Substances 0.000 claims description 2
- 229910052734 helium Inorganic materials 0.000 claims description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 229910052902 vermiculite Inorganic materials 0.000 claims description 2
- 239000010455 vermiculite Substances 0.000 claims description 2
- 235000019354 vermiculite Nutrition 0.000 claims description 2
- 238000001354 calcination Methods 0.000 claims 3
- CYPPCCJJKNISFK-UHFFFAOYSA-J kaolinite Chemical compound [OH-].[OH-].[OH-].[OH-].[Al+3].[Al+3].[O-][Si](=O)O[Si]([O-])=O CYPPCCJJKNISFK-UHFFFAOYSA-J 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 4
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 28
- 229910017028 MnSi Inorganic materials 0.000 description 23
- 239000002351 wastewater Substances 0.000 description 17
- 238000001994 activation Methods 0.000 description 13
- 230000004913 activation Effects 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 239000008367 deionised water Substances 0.000 description 5
- 229910021641 deionized water Inorganic materials 0.000 description 5
- 239000012299 nitrogen atmosphere Substances 0.000 description 5
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- 150000002500 ions Chemical group 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000000593 degrading effect Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 229910001410 inorganic ion Inorganic materials 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 229910001428 transition metal ion Inorganic materials 0.000 description 3
- 229910019001 CoSi Inorganic materials 0.000 description 2
- 229910016344 CuSi Inorganic materials 0.000 description 2
- 229910005347 FeSi Inorganic materials 0.000 description 2
- 229910005883 NiSi Inorganic materials 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 239000002135 nanosheet Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 229910016516 CuFe2O4 Inorganic materials 0.000 description 1
- 229910002546 FeCo Inorganic materials 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
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 229940088710 antibiotic agent Drugs 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229940011182 cobalt acetate Drugs 0.000 description 1
- QAHREYKOYSIQPH-UHFFFAOYSA-L cobalt(II) acetate Chemical compound [Co+2].CC([O-])=O.CC([O-])=O QAHREYKOYSIQPH-UHFFFAOYSA-L 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 description 1
- DXKGMXNZSJMWAF-UHFFFAOYSA-N copper;oxido(oxo)iron Chemical compound [Cu+2].[O-][Fe]=O.[O-][Fe]=O DXKGMXNZSJMWAF-UHFFFAOYSA-N 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- 239000000975 dye Substances 0.000 description 1
- 239000000598 endocrine disruptor Substances 0.000 description 1
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- 238000002474 experimental method Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 229940071125 manganese acetate Drugs 0.000 description 1
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Inorganic materials O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 1
- UOGMEBQRZBEZQT-UHFFFAOYSA-L manganese(2+);diacetate Chemical compound [Mn+2].CC([O-])=O.CC([O-])=O UOGMEBQRZBEZQT-UHFFFAOYSA-L 0.000 description 1
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- 150000004706 metal oxides Chemical class 0.000 description 1
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- 229910000403 monosodium phosphate Inorganic materials 0.000 description 1
- 235000019799 monosodium phosphate Nutrition 0.000 description 1
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- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
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- 239000000843 powder Substances 0.000 description 1
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- 239000002243 precursor Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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- 229910052708 sodium Inorganic materials 0.000 description 1
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- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
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- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007725 thermal activation Methods 0.000 description 1
- 239000003053 toxin Substances 0.000 description 1
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- 108700012359 toxins Proteins 0.000 description 1
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/74—Iron group metals
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- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/16—Clays or other mineral silicates
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- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
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- C—CHEMISTRY; METALLURGY
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- 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
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- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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- C—CHEMISTRY; METALLURGY
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- C—CHEMISTRY; METALLURGY
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
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- C—CHEMISTRY; METALLURGY
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
本发明公开了一种活化过硫酸盐的黏土矿物基催化剂的制备方法,包括以下步骤:将天然黏土矿物均匀分散于乙醇与水的混合溶液中,充分搅拌得到浆料;向所得的浆料中加入碳源,充分搅拌反应后,过滤、洗涤得到第一固体混合物;将第一固体混合物重新分散于水中,加入过渡金属盐,充分搅拌反应后,过滤、洗涤、干燥得到第二固体混合物;将第二固体混合物,进行焙烧处理,得焙烧产物;将所得的焙烧产物,进行酸洗,水洗至pH为中性,干燥后,得MSi双单原子共掺杂石墨烯催化剂。本发明所得黏土矿物基催化剂具有安全、低成本、易回收、适用范围广的优越性能。
Description
技术领域
本发明涉及催化剂技术领域。更具体地说,本发明涉及一种活化过硫酸盐的黏土矿物基催化剂及其制备方法和应用。
背景技术
基于硫酸根自由基的新兴高级氧化体系因其高选择性、强氧化能力、适用范围广等优点,在毒素、抗生素、农药、内分泌干扰物、持久性有机污染物、染料等有机污染水体的修复领域展现了广阔的应用前景。目前,活化过硫酸盐是硫酸根自由基的主要产生方式。其中,紫外活化、热活化、微波活化及碱活化工艺复杂;石墨烯、氮掺杂石墨烯等碳基材料活化效率较低,成本较高;而过渡金属离子(Co2+、Fe2+、Mn2+、Ni2+、Ag+等)活化中产生的重金属离子残留会对水环境产生二次污染。尽管过渡金属氧化物(单金属氧化物(Co3O4、Fe2O3、MnO2等)或多金属氧化物(FeCo2O4、CuFe2O4、FeNi2O4等))、石墨烯负载过渡金属氧化物等可以从一定程度上缓解上述过硫酸盐活化工艺中存在的问题,但仍然面临活化效率相对较低、重金属离子析出、催化材料回收困难等问题,难以满足污水处理厂的工艺需求。
单原子掺杂石墨烯催化剂,活化PMS效率较传统纳米催化剂有数量级上的提升。但是,大量昂贵前驱体的使用,显著提升了单原子掺杂石墨烯催化剂的生产成本。如何开发设计一种超高效、低成本、环境友好的异相单原子或多原子共掺杂石墨烯催化剂,用于推动基于硫酸根自由基的新兴高级氧化体系的广泛应用,仍然具有较大的挑战。
发明内容
本发明为解决现有催化剂在活化过硫酸盐降解有机物体系中活化速率低、过渡金属离子析出、回收困难、成本高等问题,提供了一种具有高效、安全、低成本、易回收、适用范围广等优越性能的用于过硫酸盐活化的黏土矿物基催化剂及其制备方法,及利用其催化过硫酸盐降解有机污染物的应用。
为了实现根据本发明的这些目的和其它优点,提供了一种活化过硫酸盐的黏土矿物基催化剂的制备方法,包括以下步骤:
步骤1、将天然黏土矿物均匀分散于乙醇与水的混合溶液中,充分搅拌得到浆料,所述浆料中天然黏土矿物的浓度为50-200g/L;
步骤2、向步骤1所得的浆料中加入碳源,充分搅拌反应后,过滤、洗涤得到第一固体混合物,所述第一固体混合物中碳源的浓度为50-200g/L;
步骤3、将步骤2所得第一固体混合物重新分散于水中,加入过渡金属盐,充分搅拌反应后,过滤、洗涤、干燥得到第二固体混合物,所述第一固体混合物重新分散于水中第一固体混合物的浓度为10-100g/L,所述过渡金属用量为2-10g/L;
步骤4、将步骤3所得第二固体混合物,进行焙烧处理,得焙烧产物;
步骤5、将步骤4所得焙烧产物,进行酸洗,水洗至pH为中性,干燥后,得MSi双单原子共掺杂石墨烯催化剂,其中,M代表Co、Mn、Cu、Ni、Fe中的一种。
优选的是,所述天然黏土矿物是高岭石、累托石、云母、蛭石、凹凸棒、海泡石、埃洛石中的一种或两种;
所述碳源为盐酸四环素、罗丹明B、葡萄糖、蔗糖中的一种或两种。
优选的是,所述过渡金属盐的阴离子为硫酸根离子、氯离子、硝酸根离子、醋酸根离子中的一种。
优选的是,步骤3中,所述搅拌反应时间为1-12h,所述干燥温度为40-80℃、时间为4-12h。
优选的是,步骤4中,所述焙烧温度为600-1000℃、时间为0.5-4h、升温速率为2-10℃、焙烧气氛为氩气、氮气、空气、氦气中的一种。
优选的是,步骤5中,所述酸洗用酸为硫酸、盐酸、氢氟酸、硝酸中的一种。
优选的是,步骤5中,所述酸的质量分数为1%-20%,所述酸洗时间为1-48h,所述干燥温度为40-80℃、时间为4-12h。
本发明提供一种活化过硫酸盐的黏土矿物基催化剂,由所述的活化过硫酸盐的黏土矿物基催化剂的制备方法制备而得。
本发明提供一种活化过硫酸盐的黏土矿物基催化剂在降解有机污染物中的应用。
优选的是,向待处理有机污染物中投加MSi双单原子共掺杂石墨烯催化剂及过硫酸盐,所述过硫酸盐为过一硫酸钾、过硫酸钠、过硫酸铵、过二硫酸钾、过二硫酸钠、过硫酸铵中的一种或多种。
本发明至少包括以下有益效果:
(1)本发明采用储量丰富、价格低廉的天然黏土矿物为原料,通过层间限域策略制备MSi双单原子共掺杂石墨烯催化剂,不仅降低了催化剂的制备成本,还提高了天然黏土矿物的附加值;
(2)本发明提供的MSi双单原子共掺杂石墨烯催化剂比表面积高,亲水性能优异,空气中稳定性能优异;
(3)本发明提供的MSi双单原子共掺杂石墨烯催化剂为固体粉末,便于携带和运输;此外,MSi双单原子共掺杂石墨烯催化剂纳米片层面积大,可通过离心或沉降快速进行回收;
(4)本发明提供的MSi双单原子共掺杂石墨烯催化剂活化过硫酸盐降解污染物效率高,显著降低催化剂及过硫酸盐的消耗量;MSi双单原子共掺杂石墨烯催化剂活化过硫酸盐使用稳定性好,重复使用性能优异,适用范围广;
(5)本发明提供的MSi双单原子共掺杂石墨烯催化剂中过渡金属含量低于0.2%,活化过硫酸盐降解污染物后,水中过渡金属离子残余低于1μg/L,显著降低重金属离子二次污染风险。
本发明的其它优点、目标和特征将部分通过下面的说明体现,部分还将通过对本发明的研究和实践而为本领域的技术人员所理解。
附图说明
图1为本发明实施例2的MnSi双单原子共掺杂石墨烯催化剂的球差电镜及相应元素面扫图;
图2为本发明实施例2的不同MnSi双单原子共掺杂石墨烯催化剂用量在活化过硫酸盐降解双酚A废水中的应用对比效果图;
图3为本发明不同过一硫酸钾用量对于实施例2的MnSi双单原子共掺杂石墨烯催化剂在活化过硫酸盐降解双酚A废水中的影响效果图;
图4为不同反应pH值对于实施例2的MnSi双单原子共掺杂石墨烯催化剂在活化过硫酸盐降解双酚A废水中的影响效果图;
图5为不同无机离子及有机质对于实施例2的MnSi双单原子共掺杂石墨烯催化剂在活化过硫酸盐降解双酚A废水中的影响效果图。
具体实施方式
下面结合实施例对本发明做进一步的详细说明,以令本领域技术人员参照说明书文字能够据以实施。
需要说明的是,下述实施方案中所述实验方法,如无特殊说明,均为常规方法,所述试剂和材料,如无特殊说明,均可从商业途径获得。
实施例1:
本实施例制备CoSi双单原子共掺杂石墨烯催化剂。
将100g云母均匀分散于水(500mL)与乙醇(500mL)的混合溶液中,充分搅拌0.5h后,加入150g的罗丹明B,充分搅拌反应4h后,过滤、洗涤,得第一固体混合物;将得到第一固体混合物重新均匀分散于1L水中,加入2g醋酸钴,充分搅拌反应2h后,过滤,洗涤,并在60℃下干燥8h,得第二固体混合物;所得第二固体混合物置于管式气氛炉中,以7℃/min的升温速率加热至900℃,在氮气气氛下焙烧2h;所得焙烧产物,用足量的质量分数为10%的氢氟酸酸洗16h,采用足量的去离子水洗涤至pH为中性,60℃干燥12h后,得到所述CoSi双单原子共掺杂石墨烯催化剂。
实施例2:
本实施例制备MnSi双单原子共掺杂石墨烯催化剂。
将150g高岭石均匀分散于水(500mL)与乙醇(500mL)的混合溶液中,充分搅拌0.5h后,加入80g的盐酸四环素,充分搅拌反应12h后,过滤、洗涤,得第一固体混合物;将得到的第一固体混合物重新均匀分散于1L水中,加入4g醋酸锰,充分搅拌反应1h后,过滤,洗涤,并在80℃下干燥4h,得第二固体混合物;所得第二固体混合物置于管式气氛炉中,以8℃/min的升温速率加热至1000℃,在氮气气氛下焙烧4h;所得焙烧产物,用足量的质量分数为20%的盐酸酸洗6h,采用足量的去离子水洗涤至pH为中性,80℃干燥4h后,得到所述MnSi双单原子共掺杂石墨烯催化剂。
参见附图1,为按实施2中技术方案制备的MnSi双单原子共掺杂石墨烯催化剂的球差电镜及相应元素面扫图,结果显示,Mn与Si以双单原子形式存在于所述催化剂中。
实施例3:
本实施例制备CuSi双单原子共掺杂石墨烯催化剂。
将200g累托石均匀分散于水(500mL)与乙醇(500mL)的混合溶液中,充分搅拌0.5h后,加入50g的葡萄糖,充分搅拌反应2h后,过滤、洗涤,得第一固体混合物;将得到的第一固体混合物重新均匀分散于1L水中,加入3g硝酸铜,充分搅拌反应2h后,过滤,洗涤,并在60℃下干燥12h,得第二固体混合物;所得第二固体混合物置于管式气氛炉中,以10℃/min的升温速率加热至800℃,在氮气气氛下焙烧3h;所得焙烧产物,用足量的质量分数为5%的硝酸酸洗12h,采用足量的去离子水洗涤至pH为中性,60℃干燥8h后,得到所述CuSi双单原子共掺杂石墨烯催化剂。
实施例4:
本实施例制备NiSi双单原子共掺杂石墨烯催化剂。
将50g凹凸棒均匀分散于水(500mL)与乙醇(500mL)的混合溶液中,充分搅拌0.5h后,加入80g的蔗糖,充分搅拌反应1h后,过滤、洗涤,得第一固体混合物;将得到的第一固体混合物重新均匀分散于1L水中,加入6g硝酸镍,充分搅拌反应4h后,过滤,洗涤,并在50℃下干燥7h,得第二固体混合物;所得第二固体混合物置于管式气氛炉中,以6℃/min的升温速率加热至600℃,在氮气气氛下焙烧2h;所得焙烧产物,用足量的质量分数为10%的硫酸酸洗12h,采用足量的去离子水洗涤至pH为中性,50℃干燥10h后,得到所述NiSi双单原子共掺杂石墨烯催化剂。
实施例5:
本实施例制备FeSi双单原子共掺杂石墨烯催化剂。
将120g海泡石均匀分散于水(500mL)与乙醇(500mL)的混合溶液中,充分搅拌0.5h后,加入200g的盐酸四环素,充分搅拌反应2h后,过滤、洗涤,得第一固体混合物;将得到的第一固体混合物重新均匀分散于1L水中,加入6g氯化铁,充分搅拌反应10h后,过滤,洗涤,并在40℃下干燥12h,得第二固体混合物;所得第二固体混合物置于管式气氛炉中,以9℃/min的升温速率加热至700℃,在氮气气氛下焙烧4h;所得焙烧产物,用足量的质量分数为15%的盐酸酸洗12h,采用足量的去离子水洗涤至pH为中性,60℃干燥12h后,得到所述FeSi双单原子共掺杂石墨烯催化剂。
实施例6:
不同实施例2的MnSi双单原子共掺杂石墨烯催化剂用量在活化过硫酸盐降解双酚A废水中的应用对比研究,包括以下步骤:
准备五组100mL,10mg/L的双酚A废水,分别向体系中加入不同质量的实施例2的MnSi双单原子共掺杂石墨烯催化剂(2.0mg、4.0mg、6.0mg、8.0mg及10.0mg),在暗处搅拌30min达到吸附平衡;再向体系中加入1.0mM过一硫酸钾进行过硫酸盐活化反应,完成对双酚A废水的降解。
具体结果如图2所示,当实施例2的MnSi双单原子共掺杂石墨烯催化剂用量为10.0mg时,在5min内,实施例2的MnSi双单原子催化剂活化过一硫酸钾,对双酚A的降解率已高达99.5%。
实施例7:
不同过一硫酸钾用量对于实施例2的MnSi双单原子共掺杂石墨烯催化剂在活化过硫酸盐降解双酚A废水中的影响研究,包括以下步骤:
准备五组100mL,10mg/L的双酚A废水,分别向体系中加入实施例2的MnSi双单原子共掺杂石墨烯催化剂(10mg),在暗处搅拌30min达到吸附平衡;再分别向体系中加入过一硫酸钾(0.2mM、0.4mM、0.6mM、0.8mM及1.0mM)进行过硫酸盐活化反应,完成对双酚A废水的降解。
具体结果如图3所示,当过一硫酸钾用量大于0.2mM时,在5min内,实施例2的MnSi双单原子共掺杂石墨烯催化剂活化过一硫酸钾,对双酚A的降解率已高达90%。
实施例8:
不同反应pH值对于实施例2的MnSi双单原子共掺杂石墨烯催化剂在活化过硫酸盐降解双酚A废水中的影响研究,包括以下步骤:
准备八组100mL,10mg/L的双酚A废水,采用0.1M的盐酸及0.1M的氢氧化钠分别调节八组废水pH值至预设值(3、4、5、6、7、8、9、10),再分别向各体系中加入实施例2的MnSi双单原子共掺杂石墨烯催化剂(10mg),在暗处搅拌30min达到吸附平衡;再分别向体系中加入过一硫酸钾(0.6mM)进行过硫酸盐活化反应,完成对双酚A废水的降解。
具体结果如图4所示,在不同反应pH值条件下,实施例2的MnSi双单原子共掺杂石墨烯催化剂活化过一硫酸钾,对双酚A的降解率无显著影响,证明实施例2的MnSi双单原子共掺杂石墨烯催化剂广泛适用性。
实施例9:
不同无机离子及有机质对于实施例2的MnSi双单原子共掺杂石墨烯催化剂在活化过硫酸盐降解双酚A废水中的影响研究,包括以下步骤:
准备六组100mL,10mg/L的双酚A废水,分别向各体系中加入氯化钠(20mM)、硫酸钠(20mM)、碳酸氢钠(20mM)、磷酸二氢钠(20mM)及腐殖酸钠(20mg/L),后分别向体系中加入实施例2的MnSi双单原子共掺杂石墨烯催化剂(10mg),在暗处搅拌30min达到吸附平衡;再分别向体系中加入过二硫酸钾(0.6mM)进行过硫酸盐活化反应,完成对双酚A废水的降解。
具体结果如图5所示,在不同无机离子及有机质存在条件下,实施例2的MnSi双单原子共掺杂石墨烯催化剂活化过一硫酸钾,对双酚A的降解率无显著影响,证明了实施例2的MnSi双单原子共掺杂石墨烯催化剂广泛适用性。
本发明的技术关键点在于:
1、本发明提供的MSi双单原子共掺杂石墨烯催化剂中过渡金属与硅以双单原子形式共同存在;
2、本发明提供的MSi双单原子共掺杂石墨烯催化剂在天然黏土矿物层间限域作用下,表现为超薄石墨烯纳米片层结构;
3、本发明提供的MSi双单原子共掺杂石墨烯催化剂活化过硫酸盐降解污染物效率高,稳定性好,重复使用性能优异,适用范围广,重金属离子二次污染风险低。
尽管本发明的实施方案已公开如上,但其并不仅仅限于说明书和实施方式中所列运用,它完全可以被适用于各种适合本发明的领域,对于熟悉本领域的人员而言,可容易地实现另外的修改,因此在不背离权利要求及等同范围所限定的一般概念下,本发明并不限于特定的细节和这里示出与描述的实施例。
Claims (9)
1.一种活化过硫酸盐的黏土矿物基催化剂的制备方法,其特征在于,包括以下步骤:
步骤1、将天然黏土矿物均匀分散于乙醇与水的混合溶液中,充分搅拌得到浆料,所述浆料中天然黏土矿物的浓度为50-200g/L;
所述天然黏土矿物是高岭石、累托石、云母、蛭石、凹凸棒、海泡石、埃洛石中的一种或两种;
步骤2、向步骤1所得的浆料中加入碳源,充分搅拌反应后,过滤、洗涤得到第一固体混合物,所述第一固体混合物中碳源的浓度为50-200g/L;
所述碳源为盐酸四环素、罗丹明B、葡萄糖、蔗糖中的一种或两种;
步骤3、将步骤2所得第一固体混合物重新分散于水中,加入过渡金属盐,充分搅拌反应后,过滤、洗涤、干燥得到第二固体混合物,所述第一固体混合物重新分散于水中第一固体混合物的浓度为10-100g/L,所述过渡金属用量为2-10g/L;
步骤4、将步骤3所得第二固体混合物,进行焙烧处理,得焙烧产物;
步骤5、将步骤4所得焙烧产物,进行酸洗,水洗至pH为中性,干燥后,得MSi双单原子共掺杂石墨烯催化剂,其中,M代表Co、Mn、Cu、Ni、Fe中的一种。
2.如权利要求1所述的活化过硫酸盐的黏土矿物基催化剂的制备方法,其特征在于,所述过渡金属盐的阴离子为硫酸根离子、氯离子、硝酸根离子、醋酸根离子中的一种。
3.如权利要求1所述的活化过硫酸盐的黏土矿物基催化剂的制备方法,其特征在于,步骤3中,所述搅拌反应时间为1-12h,所述干燥温度为40-80℃、时间为4-12h。
4.如权利要求1所述的活化过硫酸盐的黏土矿物基催化剂的制备方法,其特征在于,步骤4中,所述焙烧温度为600-1000℃、时间为0.5-4h、升温速率为2-10℃/min、焙烧气氛为氩气、氮气、空气、氦气中的一种。
5.如权利要求1所述的活化过硫酸盐的黏土矿物基催化剂的制备方法,其特征在于,步骤5中,所述酸洗用酸为硫酸、盐酸、氢氟酸、硝酸中的一种。
6.如权利要求1所述的活化过硫酸盐的黏土矿物基催化剂的制备方法,其特征在于,步骤5中,所述酸的质量分数为1%-20%,所述酸洗时间为1-48h,所述干燥温度为40-80℃、时间为4-12h。
7.一种活化过硫酸盐的黏土矿物基催化剂,其特征在于,由权利要求1~6任一项所述的活化过硫酸盐的黏土矿物基催化剂的制备方法制备而得。
8.一种如权利要求7所述的活化过硫酸盐的黏土矿物基催化剂在降解有机污染物中的应用。
9.如权利要求8所述的活化过硫酸盐的黏土矿物基催化剂在降解有机污染物中的应用,其特征在于,向待处理有机污染物中投加MSi双单原子共掺杂石墨烯催化剂及过硫酸盐,所述过硫酸盐为过一硫酸钾、过硫酸钠、过硫酸铵、过二硫酸钾、过二硫酸钠、过硫酸铵中的一种或多种。
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