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A method for directly using sunlight to catalyze the degradation of phthalate pollutants

A phthalate, catalytic degradation technology, applied in water pollutants, chemical instruments and methods, chemical/physical processes, etc., to achieve the effect of high efficiency, uniform loading, easy recovery and reuse

Active Publication Date: 2019-05-14
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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  • A method for directly using sunlight to catalyze the degradation of phthalate pollutants
  • A method for directly using sunlight to catalyze the degradation of phthalate pollutants
  • A method for directly using sunlight to catalyze the degradation of phthalate pollutants

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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 directly utilizing sunlight to catalytically degrade phthalate pollutants, and belongs to the technical field of environmental engineering. Using cheap and easily available urea as raw material, the supernatant is obtained through segmented roasting, ultrasonic stripping and centrifugation. After drying, nano carbon nitride with a particle size distribution of mainly 30 to 50 nm is obtained, which is then modified by a coupling agent and dispersed. In methanol solution, evenly coated and fixed on the inner surface of the pre-treated glass container, using it as a catalyst can significantly accelerate the degradation process of phthalates under sunlight, with a removal rate of 95 to 100%. The invention is suitable for actual operations at pollutant treatment sites, has high efficiency and low cost, and is a beneficial innovation in introducing solar photocatalysis into environmental engineering. At the same time, the catalyst is a non-metallic component, has no risk of secondary pollution, and is evenly loaded. It is strong, easy to recycle and reuse after reaction, and has good commercial value and application prospects.

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 nano-carbon nitride immobilized on the surface of glass 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.Abd...

Claims

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Application Information

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Patent Type & Authority Patents(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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