Method for efficiently and fast removing antipyrine by using MnOx/SBA-15-PMS compound system and application

An anti-aging and efficient technology, applied in chemical instruments and methods, water/sewage treatment, chemical/physical processes, etc., can solve the problem of mineralization rate reaching 60%, inconvenient storage and transportation, narrow pH operating range, etc. problem, to achieve the effect of simple and feasible preparation method, reusable regeneration performance, and equipment requirements

Active Publication Date: 2015-06-24
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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Problems solved by technology

[0002] with hydroxyl radicals ( · OH) as an oxidant to treat refractory organic pollutants is an advanced oxidation technology (Advanced Oxidation Processes, AOPs) developed in the 1980s. · OH has strong oxidation ability (2.6 V), low selectivity and fast reaction rate (106-108 M -1 ?s -1 ), high electrophilicity, mild reaction conditions, no need for high temperature and high pressure, and easy operation, so it is widely used in the degradation of pollutants in water. · The OH group-based advanced oxidation technology also has some defects: (1) narrow pH operating range (pH 2-4); (2) requires a large amount of iron salt and produces a large amount of iron sludge, and the mineralization rate is difficult to achieve 60%; (3) H 2 o 2 Due to its instability, it is inconvenient to store and transport; (4) · OH is susceptible to CO 3 2? 、PO 4 3? , SO 4 2? and Cl ? inactivated by anion quenching
[0005] The literature search results show that: with mesoporous silica SBA-15 as the catalyst carrier, manganese oxide (MnO x ) as a catalyst, MnO synthesized by ultrasonic-impregnation-high-temperature calcination method x The method and application of SBA-15 composite catalyzing PMS to remove antipyrin have not been reported yet

Method used

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  • Method for efficiently and fast removing antipyrine by using MnOx/SBA-15-PMS compound system and application
  • Method for efficiently and fast removing antipyrine by using MnOx/SBA-15-PMS compound system and application
  • Method for efficiently and fast removing antipyrine by using MnOx/SBA-15-PMS compound system and application

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Example 1: Preparation and characterization of mesoporous silica (SBA-15) carrier, this example is a control experiment of the method of the present invention. The details are as follows.

[0031] (1) Mesoporous SBA-15 was synthesized according to the method reported in the literature ( Science , 1998, 279 (5350), 548-552): Weigh 4.000 g of poly(ethylene glycol)-poly(propylene glycol)-poly(ethylene glycol) polymer (P-123) and place in 125 mL 2 M HCl solution in a clean beaker, placed in a 311 K water bath and stirred for 24 h; after P-123 was fully dissolved, 8.17 g of tetraethyl silicate (TEOS) was added, continued to be placed in a 311 K water bath and stirred for 24 h, and then dissolved at 373 K hydrothermal reaction for 24 h; cooling, filtering and washing, drying, calcination at 823 K for 6 h, and grinding to obtain SBA-15.

[0032] (2) Field emission scanning electron microscopy (FE-SEM) characterization of the mesoporous SBA-15 prepared in this example (see ...

Embodiment 2

[0033] Embodiment 2: This MnO x / SBA-15 (MS) composite material preparation, the details are as follows.

[0034] (1) First prepare the mesoporous SBA-15 carrier according to Example 1.

[0035] (2) Prepare 90MS 6 (823,3) Composite material: Weigh 0.1604 g (0.6546 mmol) of Mn(CH 3 COO) 2 ?4H 2 O and use it in an appropriate amount of deionized water, then add 0.6 g of SBA-15, put it in 348 K for drying after ultrasonication for 90 min; then place the dried sample in a muffle furnace at 823 K for 3 h K / min), after cooling down to room temperature, the sample obtained after grinding is 90MS 6 (823,3) Composite material, stored for future use.

[0036] (3) According to step (2) of this embodiment, Mn(CH 3 COO) 2 ?4H 2 O dosage, sonication time, drying temperature, calcination temperature and time were changed to 0.1069 g (0.4364 mmol), 60 min, 333 K, 723 K and 2 h to prepare 60MS 4 (723,2) Composite material, store for future use.

[0037] (4) According to step (2) of ...

Embodiment 3

[0038] Example 3: Different MS composite materials catalyzed PMS to degrade antipyrin in water, the specific content is as follows.

[0039] (1) Investigate 120MS 8 (923,4)-PMS composite system degrading antipyrine efficiency in water: 120MS was prepared according to the method described in Example 2 8 (923,4) composites. Prepare an aqueous solution with a concentration of 50 mg / L antipyrine and adjust its pH to 11. Measure 80 mL of antipyrine aqueous solution with a concentration of 50 mg / L in 4 clean reaction vials and number them, add 120MS to No. 1 reaction vial 8 (923,4) composite material (2.5 g / L) and PMS (15 mM), 120MS was added to the No. 2 reaction bottle 8 (923,4) Composite material (2.5 g / L), PMS (15 mM) was added to No. 3 reaction bottle, no material was added to No. 4 reaction bottle (control sample), and stirred at room temperature (300 rpm) for 100 min. At regular intervals, 2 mL water samples were taken for analysis.

[0040] (2) Draw the data obtained fr...

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Abstract

The invention discloses a method for efficiently and fast removing antipyrine by using a MnOx/SBA-15-PMS compound system and application. The method comprises the following steps: (1) preparing MnOx/SBA-15(MS) compound materials under different synthesis conditions; (2) preparing a 0.5-50mg/L antipyrine target solution, and regulating the pH to 3-11; and (3) respectively adding a certain amount of MS compound material and potassium hydrogen sulfate (PMS) in the antipyrine target solution, and reacting under room temperature. The method disclosed by the invention firstly discovers that the MS-PMS catalytic oxidation compound system is capable of fast and effectively removing the antipyrine, and capable of maintaining high removal rate (more than 90%) under the reaction condition that the pH value change is large. The process is easy to operate, the process is simple and the equipment demand is low; the used MS compound catalytic material is easy to regenerate and recycle. The method disclosed by the invention can be widely applied to removing newly developed pollutant in the water environment, and has wide market application prospect.

Description

technical field [0001] The invention belongs to the technical field of environmental functional materials and water pollution control, and relates to a method using MnO x The method and application of efficient and rapid removal of antipyrin by / SBA-15-PMS composite system. Background technique [0002] with hydroxyl radicals ( · OH) as an oxidant to treat refractory organic pollutants is an advanced oxidation technology (Advanced Oxidation Processes, AOPs) developed in the 1980s. · OH has strong oxidation ability (2.6 V), low selectivity and fast reaction rate (106-108 M -1 ?s -1 ), high electrophilicity, mild reaction conditions, no need for high temperature and high pressure, and easy operation, so it is widely used in the degradation of pollutants in water. · The OH group-based advanced oxidation technology also has some defects: (1) narrow pH operating range (pH 2-4); (2) requires a large amount of iron salt and produces a large amount of iron sludge, and the minera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/58B01J29/035
CPCB01J29/035C02F1/725C02F2101/34C02F2101/38C02F2301/00C02F2305/02
Inventor 付明来杨佳诚林小琼
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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