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Colloid ozone bubble as well as preparation method and application thereof

A technology of ozone and colloid, applied in chemical instruments and methods, oxidized water/sewage treatment, adsorbed water/sewage treatment, etc., can solve problems such as inability to achieve environmental restoration, and achieve easy promotion, huge application value, and high utilization rate Effect

Active Publication Date: 2019-09-24
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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  • Colloid ozone bubble as well as preparation method and application thereof
  • Colloid ozone bubble as well as preparation method and application thereof
  • Colloid ozone bubble as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[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. Freshly pre...

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 colloid ozone bubble as well as a preparation method and application thereof. The preparation method of the colloid ozone bubble comprises the following steps: presetting a surfactant solution in a bubble generating tank in a mode of continuously producing bubbles, wherein the reserved amount of the surfactant solution accounts for 30-40% of the volume of the bubble generating tank; introducing the surfactant solution in a bubble generating fluid storage tank into the bubble generating tank via a liquid inlet pump at a flow velocity of 50-80mL / min, and introducing air into an air source ozone generator; supplying 3000V high voltage power to the ozone generator so as to rapidly convert oxygen into ozone, introducing the obtained high-concentration ozone-electric ion mixed air into the bubble generating tank from the air inlet at the bottom of the bubble generating tank at a flow velocity of 16.7-66.7mL / min, stirring the gas-liquid mixture by a high-speed stirrer for 40-80 seconds at 4000-6000 revolutions per minute, and producing bubble suspension, namely the colloid ozone bubble. The colloid ozone bubble disclosed by the invention is applied to treating polycyclic aromatic hydrocarbons (PAHs) contaminants in water body sediments.

Description

technical field [0001] The invention relates to the technical field of water sediment restoration, in particular to a colloidal ozone microbubble (COAs) and a preparation method thereof and its application in rapidly separating and oxidatively decomposing polycyclic aromatic hydrocarbons (PAHs) pollutants in water sediments. Background technique [0002] Polycyclic aromatic hydrocarbons (PAHs) are a class of organic pollutants with semi-volatile, long-range mobility, persistence, and bioaccumulation. They are listed as primary pollutants by the United States Environmental Protection Agency because of their teratogenic, carcinogenic, and mutagenic potential. PAHs mainly come from human activities, such as industrial production, biomass and fuel combustion. River water is an important receptor for 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 water environment. PAHs themselve...

Claims

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Application Information

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Patent Type & Authority Applications(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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