Method for removing organic pollutants in water through photocatalytically activating calcium peroxide

A technology for organic pollutants and calcium peroxide, which is applied in the field of removing organic pollutants in water and photocatalytically activating calcium peroxide to remove organic pollutants in water, can solve the problems of long processing time, low activation efficiency and complex process, etc. Achieve fast effect, avoid reprocessing problems, and apply a wide range of pollutants

Active Publication Date: 2019-01-18
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The activation of transition metal ions requires a low pH condition (pH = about 3), and after the reaction, alkali needs to be added to adjust the pH of the solution to neutral, and a large amount of iron sludge needs to be processed at the same time, and the process is relatively complicated
Although thermal activation is simple and easy, the activation efficiency is not high and the processing time is longer

Method used

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  • Method for removing organic pollutants in water through photocatalytically activating calcium peroxide
  • Method for removing organic pollutants in water through photocatalytically activating calcium peroxide

Examples

Experimental program
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Effect test

Embodiment 1

[0021] A photocatalytically activated CaO 2 Methods for removing organic pollutants in wastewater:

[0022] Choose CaO with a mass content of 75% 2 As raw material and add water to make CaO 2 Suspension, for CaO 2 It can play its greatest advantage in water, using hydrochloride buffer solution to maintain pH stability. Start the reactor, and after the lamp tube is preheated for 30 minutes and the light source is output stably, the wastewater to be treated (prepared diclofenac sodium wastewater solution, DCFNa) with a concentration of 20 mg / L is placed in the photocatalytic reactor, and then the prepared CaO 2 The reaction liquid is added to the waste water. Under light irradiation, the light source activates the CaO 2 Will produce active species like OH, O 2 ·- etc., so as to realize the degradation of organic pollutants in wastewater. To verify that CaO 2 Under ultraviolet light, the efficiency of treating organic matter can be greatly improved, compared with the sin...

Embodiment 2

[0025] A photocatalytically activated CaO 2 Methods to remove different concentrations of organic pollutants in water:

[0026] Choose CaO with a mass content of 75% 2 As raw material and add water to make CaO 2 Suspension, for CaO 2 It can be used to its greatest advantage in water, using a phosphate buffer solution to maintain a stable pH. Start the reactor, and after the lamp tube is preheated for 30 minutes and the light source is output stably, different concentrations of wastewater to be treated (diclofenac sodium wastewater solutions with concentrations of 30mg / L, 40mg / L, and 50mg / L respectively, DCFNa) are placed in the light In the catalytic reactor, the prepared CaO 2 The reaction liquid is added to the waste water. Under light irradiation, the light source activates the CaO 2 Will produce active species like OH, O 2 ·- etc., so as to realize the degradation of organic pollutants in wastewater. The reaction continued for 3 hours, and after filtration, sample...

Embodiment 3

[0029] A photocatalytic activation of different concentrations of CaO 2 Methods for removing organic pollutants in wastewater:

[0030] Choose CaO with a mass content of 75% 2 As raw material and add water to make CaO 2 Suspension, for CaO 2 It can play its greatest advantage in water, using pH buffer solution to maintain pH stability. Start the reactor, and after the lamp tube is preheated for 30 minutes and the light source is output stably, the wastewater to be treated (diclofenac sodium wastewater solution, DCFNa) with a concentration of 30 mg / L is placed in the photocatalytic reactor, and then the prepared CaO 2The reaction liquid is added to the waste water. Under light irradiation, the light source activates the CaO 2 Will produce active species like OH, O 2 ·- etc., so as to realize the removal of organic pollutants in wastewater. Similarly, prepare different concentrations of CaO 2 , and then repeat the above experiment. The reaction continued for 3 hours, a...

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Abstract

The invention discloses a method for removing organic pollutants in water through photocatalytically activating calcium peroxide. The method is characterized by comprising the following steps: addingwater into the calcium peroxide to prepare suspension liquid; meanwhile, regulating the pH (Potential of Hydrogen) value of the suspension liquid by utilizing a pH regulator according to different oxygen release and oxidization requirements; putting wastewater to be treated into a photocatalytic reactor; starting the reactor; after pre-heating a lamp tube and stably outputting a light source, adding the calcium peroxide suspension liquid into the wastewater; activating the calcium peroxide under the illumination of the light source to generate an active substance, so that degradation of the organic pollutants in the wastewater is realized. According to the method, the organic pollutants in the water are removed by photocatalytically activating CaO2; compared with a single oxidization repairing technology or a photocatalytic technology, the acting effect is more rapid, and the applicable range on the pollutants is wider.

Description

technical field [0001] The invention relates to a method for removing organic pollutants in water, in particular to a method for photocatalytically activating calcium peroxide to remove organic pollutants in water, and belongs to the technical field of water treatment. Background technique [0002] Calcium peroxide (CaO 2 ) is a stable environment-friendly inorganic substance with oxygen-releasing and oxidizing properties. It is often used in aquaculture and agricultural planting. In recent years, it has also been introduced into the field of water treatment. While it releases oxygen in water, it can also release oxidizing substances-hydrogen peroxide (H 2 o 2 ). Therefore, people sometimes refer to calcium peroxide as "solid hydrogen peroxide". After this property was discovered, calcium peroxide was applied to the field of wastewater treatment and soil remediation, and showed its unique advantages. According to relevant research reports, 1g of CaO 2 Dissolved in wate...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F1/30C02F1/32C02F101/30
CPCC02F1/30C02F1/32C02F1/722C02F2101/30C02F2305/023
Inventor 钱雅洁李前薛罡高品陈红李响刘振鸿袁健吴桐许若梦锁瑞娟刘祥
Owner DONGHUA UNIV
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