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Preparation method and application of iron/lanthanum manganate catalyst

A catalyst, lanthanum manganate technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of inability to meet emission requirements, low TOC removal rate, etc., and achieve easy regeneration and low cost. , high active effect

Pending Publication Date: 2021-03-26
CHINA NORTH ENERGY CONSERVATION & ENVIRONMENT PROTECTION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method and application of an iron / lanthanum manganate catalyst in order to solve the problem that the TOC removal rate is low during the existing wastewater treatment and cannot meet the emission requirements

Method used

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  • Preparation method and application of iron/lanthanum manganate catalyst
  • Preparation method and application of iron/lanthanum manganate catalyst
  • Preparation method and application of iron/lanthanum manganate catalyst

Examples

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Embodiment 1

[0034] Weigh 9.0101g La(NO 3 ) 3 ·6H 2 O, 8.4491g Fe(NO 3 ) 3 9H 2 Dissolve O in 100mL distilled water and mix well; take 8mL ammonia water and 0.25g polyethylene glycol (PEG) (molecular weight: 20000) and add them into 92mL distilled water; add the well-mixed lye into the salt solution drop by drop, and stir magnetically after the dropwise addition One hour; as for aging at 100°C for 24 hours, vacuum filter, wash with distilled water to a medium size, filter and dry in an oven at 120°C for 14 hours, then use a muffle furnace to heat up to 3°C / min in an air atmosphere. Calcined at 800°C for 4h, recorded as LaFeO 3 . to LaFeO 3Physical adsorption characterization (see Table 1) and SEM characterization (see image 3 ), and carried out catalytic ozonation experiment, reaction conditions: normal temperature, normal pressure, 100ppm m-cresol model wastewater, initial pH of wastewater: 7.0, O 3 (mg / L):COD(mg / L)=1.9:1, the ratio of ozone flow to wastewater flow is 3.7:1.

Embodiment 2

[0036] Weigh 9.0538g La(NO 3 ) 3 ·6H 2 O, 7.4085g Mn(NO 3 ) 2 (50%) dissolved in 100mL of distilled water and mixed evenly; take 8mL of ammonia water and 0.25g of polyethylene glycol (PEG) (molecular weight 20000) and add it to 92mL of distilled water; add the well-mixed lye to the salt solution drop by drop, and the dropwise addition is completed Then magnetically stir for one hour; as for aging at 100°C for 24 hours, vacuum filter, wash with distilled water to medium size, dry in an oven at 120°C for 14 hours after filtration, and then use a muffle furnace to heat up at 3°C / min in an air atmosphere The temperature was raised to 800 ° C for 4 hours, and it was recorded as LaMnO 3 . to LaMnO 3 Physical adsorption characterization (see Table 1) and SEM characterization (see Figure 4 ), and carried out catalytic ozonation experiment, reaction conditions: normal temperature, normal pressure, 100ppm m-cresol model wastewater, initial pH of wastewater: 7.0, O 3 (mg / L):COD(...

Embodiment 3

[0038] Weigh 9.0101g La(NO 3 ) 3 ·6H 2 O, 4.2246g Fe(NO 3 ) 3 9H 2 O, 3.6864g Mn(NO 3 ) 2 (50%) dissolved in 100mL of distilled water and mixed evenly; take 8mL of ammonia water and 0.25g of polyethylene glycol (PEG) (molecular weight 20000) and add it to 92mL of distilled water; add the well-mixed lye to the salt solution drop by drop, and the dropwise addition is completed Then magnetically stir for one hour; as for aging at 100°C for 24 hours, vacuum filter, wash with distilled water to medium size, dry in an oven at 120°C for 14 hours after filtration, and then use a muffle furnace to heat up at 3°C / min in an air atmosphere The temperature is raised to 800°C for 4 hours, and it is recorded as LaFe 0.5 mn 0.5 o 3 . to LaFe 0.5 mn 0.5 o 3 Physical adsorption characterization (see Table 1) and SEM characterization (see Figure 5 ), and carried out catalytic ozonation experiment, reaction conditions: normal temperature, normal pressure, 100ppm m-cresol model wast...

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Abstract

The invention provides a preparation method and application of an iron / lanthanum manganate catalyst, and belongs to the field of wastewater treatment. The preparation method comprises the following steps: taking polyethylene glycol (PEG) as a dispersing agent, jointly dissolving the polyethylene glycol (PEG) and ammonia water in an aqueous solution to form an alkaline solution A, jointly dissolving one or two of ferric nitrate and manganese nitrate and lanthanum nitrate in the aqueous solution to obtain a salt solution B, dropwise adding the alkaline solution into an inorganic salt solution toform a solution, and then performing stirring and hydrothermal aging treatment, and then cooling, carrying out suction filtration, washing, drying and roasting to obtain a LaFe1-xMnxO3 catalyst. Theprepared LaFe1-xMnxO3 catalyst is approximately spherical, has the particle size of 10-50nm, the specific surface area of 5-40cm < 3 > g < -1 > and the pore size distribution of 1.5-18 nm, and is a non-noble metal modified perovskite type catalyst material with high stability, high activity and low cost. The catalyst is applied to catalyzing ozone and hydrogen peroxide to treat m-cresol model wastewater in cooperation with an oxidation reaction, explosive biochemical effluent and has a good effect.

Description

technical field [0001] The invention provides a preparation method and application of an iron / lanthanum manganate catalyst, belonging to the field of wastewater treatment. Background technique [0002] At present, the efficient, rapid and harmless treatment of highly toxic and difficult-to-biodegradable industrial organic wastewater is the focus and difficulty of current wastewater treatment. The emergence and continuous development of catalytic ozone oxidation (Catalytic Wet Ozonation Oxidation, CWOO) technology provides a feasible way for the treatment of this kind of wastewater, because it has the characteristics of strong oxidation ability, simple process and no secondary pollution. It has become the mainstream technology for industrial wastewater pretreatment and advanced treatment, and has been adopted by a large number of industrial parks and enterprises. At present, the use of its single technology also has the problem of low removal rate in terms of standard discha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J23/83B01J23/34B01J35/10B01J37/03B01J37/10B01J37/08C02F1/72C02F1/78C02F101/34C02F101/38
CPCB01J23/8892B01J23/83B01J23/34B01J23/002B01J37/031B01J37/10B01J37/082C02F1/722C02F1/78B01J2523/00C02F2101/345C02F2101/38B01J35/612B01J35/613B01J35/633B01J35/647B01J2523/3706B01J2523/72B01J2523/842
Inventor 姜鑫王盛哲武春艳赵颖崔剑孙承林郝亚婷卫皇曌马磊胡连武桑欣欣文传选刘珣
Owner CHINA NORTH ENERGY CONSERVATION & ENVIRONMENT PROTECTION
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