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Method for catalytically degrading phthalate pollutant by directly utilizing sunlight

A phthalate ester, catalytic degradation technology, applied in the direction of water pollutants, chemical instruments and methods, chemical/physical processes, etc., to achieve the effect of accelerating the degradation process, low cost, and high efficiency

Active Publication Date: 2017-05-31
SHANXI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem solved by the present invention is to overcome the defects of the existing photocatalytic degradation method of phthalate pollutants, and provide a kind of pollutant with high degradation rate, no secondary pollution, mild catalyst immobilization condition and multiple times Recycling, convenient and fast operation, applicable to the degradation method of phthalate ester pollutants for on-site treatment of pollutants

Method used

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  • Method for catalytically degrading phthalate pollutant by directly utilizing sunlight
  • Method for catalytically degrading phthalate pollutant by directly utilizing sunlight
  • Method for catalytically degrading phthalate pollutant by directly utilizing sunlight

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Embodiment 1

[0045] A method for directly utilizing sunlight to catalyze the degradation of phthalate pollutants, comprising the steps of:

[0046] 1) Preparation of nano-carbon nitride powder: put a certain amount of urea in a reactor and calcinate at 480°C for 4h, drop to room temperature, and then put in 30% H 2 o 2 heated to 60°C for 16 hours, urea and H 2 o 2 The mass ratio of urea is 1:55; the reaction solution is filtered, the filter residue is calcined at 520°C for 4 hours, cooled to room temperature, put into water with 100 times the mass of urea and ultrasonically stripped for 15 hours, then centrifuged to take the supernatant, and dried to obtain nano-carbon nitride powder;

[0047] The ultrasonic power is 65W;

[0048] The centrifugal speed is 3200r / min, and the centrifugal time is 40min;

[0049] The particle size of the nano carbon nitride powder is 30nm;

[0050] 2) Preparation of modified nano-carbon nitride methanol solution: uniformly mix the nano-carbon nitride powde...

Embodiment 2

[0065] A method for directly utilizing sunlight to catalyze the degradation of phthalate pollutants, comprising the steps of:

[0066] 1) Preparation of nano-carbon nitride powder: put a certain amount of urea in a reactor and calcined at 400°C for 3 hours, then drop to room temperature, and then put in 30% H 2 o 2 Heated to 55°C for 8 hours, urea and H 2 o 2 The mass ratio of urea is 1:10; the reaction solution is filtered, the filter residue is calcined at 450°C for 3 hours, cooled to room temperature, put into water with 100 times the mass of urea and ultrasonically stripped for 6 hours, then centrifuged to take the supernatant, and dried to obtain nano-carbon nitride powder;

[0067] The ultrasonic power is 50W;

[0068] The centrifugal speed is 3000r / min, and the centrifugal time is 30min;

[0069] The particle size of the nano carbon nitride powder is 50nm;

[0070] 2) Preparation of modified nano-carbon nitride methanol solution: uniformly mix the nano-carbon nitr...

Embodiment 3

[0085] A method for directly utilizing sunlight to catalyze the degradation of phthalate pollutants, comprising the steps of:

[0086] 1) Preparation of nano-carbon nitride powder: put a certain amount of urea in a reactor and calcinate at 550°C for 5h, drop to room temperature, and then put in 30% H 2 o 2 Heated to 65°C for 24 hours, urea and H 2 o 2 The mass ratio of urea is 1:100; the reaction solution is filtered, the filter residue is calcined at 600°C for 5 hours, cooled to room temperature, put into water with 100 times the mass of urea and ultrasonically stripped for 24 hours, then centrifuged to take the supernatant, and dried to obtain nano-carbon nitride powder;

[0087] The ultrasonic power is 80W;

[0088] The centrifugal speed is 3500r / min, and the centrifugal time is 50min;

[0089] The particle size of the nano carbon nitride powder is 40nm;

[0090] 2) Preparation of modified nano-carbon nitride methanol solution: uniformly mix the nano-carbon nitride po...

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Abstract

The invention discloses a method for catalytically degrading phthalate pollutant by directly utilizing sunlight, and belongs to the technical field of environmental engineering. The method comprises the following steps: preparing supernate by using low-price easily-available urea as a raw material through stepwise roasting, ultrasonic peeling and centrifuging; drying to obtain nano-carbon nitride having grain size mainly distributed in a range of 30-50nm; and modifying with a coupling agent, dispersing in a methyl alcohol solution, uniformly applying and immobilizing to the inner surface of a pre-treated glass container. The treated glass container serving as a catalyst can be used for remarkably accelerating the degrading process of phthalate under sunlight radiation, and the removal rate can be 95-100 percent. The method is applicable to actual operation of a pollutant treatment field, has high efficiency and low cost, is beneficial innovation of introducing sunlight catalysis to the environmental engineering; the catalyst is a non-metallic ingredient, does not have secondary pollution risk, has uniform and firm immobilization, is convenient for reclaiming and recycling after reaction, and has relatively good commercial value and application prospect.

Description

technical field [0001] The invention relates to a method for catalytically degrading phthalate pollutants, in particular to a method for directly using sunlight to degrade phthalate pollutants by using nanometer carbon nitride immobilized on the glass surface as a catalyst . Background technique [0002] Phthalates are mostly used in plasticizers, adhesives, inks, and additives in food, cosmetics, and skin care products. They are one of the typical pollutants recognized by the United Nations Environment Program and the World Health Organization. It can be found in meat, fat and human urine, and long-term contact with it will significantly affect the balance of hormones and reproductive development in humans and animals. Studies have shown that traditional water treatment processes such as adsorption and biological methods have limited degradation capabilities for such compounds, while advanced oxidation treatment processes can effectively and deeply degrade them (MahmoudM.A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30B01J31/02C02F101/34
CPCC02F1/30B01J31/0275C02F2305/10C02F2101/34B01J35/39Y02W10/37
Inventor 朱娜梁栋张洁桑楠李广科
Owner SHANXI UNIV
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