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A kind of colloidal ozone bubble and its preparation method and application

An ozone and colloid technology, applied in chemical instruments and methods, oxidized water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as inability to achieve environmental restoration, and achieve easy promotion, reduced dosage, and simple operation. Effect

Active Publication Date: 2021-08-24
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for the persistent organic pollutants PAHs, only using CGAs for enrichment and transfer is still unable to achieve complete environmental remediation, and PAHs need to be decomposed in situ on this basis

Method used

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  • A kind of colloidal ozone bubble and its preparation method and application
  • A kind of colloidal ozone bubble and its preparation method and application
  • A kind of colloidal ozone bubble and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Effects of Nonionic Surfactant Concentration on Properties of COAs and Removal Efficiency of PAHs

[0032]The high-pressure electrolysis method is adopted, and the air gas flow rate is 16.7mL / min to prepare ozone, and the yield is 10g / h. Tween20 solution with a concentration of 74mg / L (about 1 times the critical micelle concentration), 370mg / L (about 5 times the critical micelle concentration) and 740mg / L (about 10 times the critical micelle concentration), 28mg / L ( About 1 times the critical micelle concentration), 140mg / L (about 5 times the critical micelle concentration) and 280mg / L (about 10 times the critical micelle concentration) rhamnolipid solutions were used as bubble generating solutions. Preset 1L of surfactant solution in the bubble generation tank and stir it with a high-speed stirrer at 5000rpm. At the same time, the surfactant solution is passed into the tank from the bottom of the side wall of the bubble generation tank at a flow rate of 60mL / min. Fresh...

Embodiment 2

[0039] Influence of Ozone Introductory Rate on COAs Properties and PAHs Removal Efficiency During COAs Preparation

[0040] Ozone was prepared by high-pressure electrolysis, the air flow rate was 16.7mL / min, and a generator with an ozone yield of 10g / h was selected. Tween20 solution with a concentration of 74 mg / L (about 1 time of critical micelle concentration) and rhamnolipid solution of 28 mg / L (about 1 time of critical micelle concentration) were used as bubble generating liquid. Preset 1L of surfactant solution in the bubble generation tank and stir it with a high-speed stirrer at 5000rpm. At the same time, the surfactant solution is passed into the tank from the bottom of the side wall of the bubble generation tank at a flow rate of 60mL / min. Freshly prepared ozone mixed with air From the central position of the bottom of the bubble generation tank, it was introduced into the tank at the speed of 16.7mL / min, 33.3mL / min, and 66.7mL / min respectively, and the bubble generat...

Embodiment 3

[0046] Effects of different concentrations of PAHs in sediments on the properties of COAs and the removal efficiency of PAHs

[0047] A high-pressure electrolysis method is adopted with an air flow rate of 66.7mL / min to prepare ozone, and a generator with an ozone yield of 10g / h is selected. Tween20 solution with a concentration of 74 mg / L (about 1 time of critical micelle concentration) and rhamnolipid solution of 28 mg / L (about 1 time of critical micelle concentration) were used as bubble generating liquid. Preset 1L of surfactant solution in the bubble generation tank and stir it with a high-speed stirrer at 5000rpm. At the same time, the surfactant solution is passed into the tank from the bottom of the side wall of the bubble generation tank at a flow rate of 60mL / min. Freshly prepared ozone mixed with air From the central position of the bottom of the bubble generation tank, it was passed into the tank at a rate of 66.7mL / min, and the bubble generation time was 60s to pr...

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Abstract

The invention discloses a colloidal ozone bubble and its preparation method and application. The preparation method of the colloidal ozone microbubble is as follows: in the mode of continuously generating bubbles, firstly, a surfactant solution is preset in a bubble generation tank , the reserved amount of the surfactant solution accounts for 30-40% of the tank volume of the bubble generation tank, and the surfactant solution in the bubble generation liquid storage tank is passed through the liquid inlet pump at a flow rate of 50-80mL / min Pass it into the bubble generation tank, and at the same time pass the air into the air source ozone generator, 3000V high voltage power supply to the ozone generator to work quickly convert oxygen into ozone, get high concentration of ozone ion mixed air from the bottom of the bubble generation tank The air inlet of the air inlet is passed into the bubble generation tank at a flow rate of 16.7-66.7mL / min, and the high-speed stirrer stirs the gas-liquid mixture at 4000-6000rpm, and the stirring time is 40-80s. The generated bubble suspension is colloidal ozone micro bubble. The colloidal ozone microbubbles described in the invention are applied to the treatment of polycyclic aromatic hydrocarbons (PAHs) pollutants in water body sediments.

Description

technical field [0001] The invention relates to the technical field of water body sediment restoration, in particular to a colloidal ozone microbubble (COAs) and its preparation method and its application in rapidly separating and oxidatively decomposing polycyclic aromatic hydrocarbons (PAHs) pollutants in water body sediments. Background technique [0002] Polycyclic aromatic hydrocarbons (PAHs) are a class of organic pollutants with semi-volatility, long-distance migration, persistence and bioaccumulation. They are listed as the primary pollutants by the United States Environmental Protection Agency because of their susceptibility to teratogenicity, carcinogenesis and mutagenesis. PAHs mainly come from human activities, such as industrial production, biomass and fuel combustion, etc. River water is an important receptor of urban sewage, industrial wastewater and non-point source runoff, and its sediments are considered to be one of the main destinations of PAHs in the wat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/78C02F1/28C02F101/32
CPCC02F1/28C02F1/78C02F2101/327
Inventor 张明潘响亮冯裕栋蔡忠侠王亚峰杨钧椷
Owner ZHEJIANG UNIV OF TECH
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