Application of piezoelectric material barium titanate in ultrasonic activation of persulfate for wastewater treatment

A piezoelectric material and persulfate technology, applied in the field of water treatment, to achieve the effect of increasing removal efficiency, accelerating degradation efficiency and rate, and promoting removal

Active Publication Date: 2019-04-12
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to overcome the defects and deficiencies of existing persulfate activation to generate sulfate radicals, and provide a piezoelectric material barium titanate ultrasonically activated persulfate in the treatment of waste water. React with persulfate in an ultrasonic environment to produce hydroxyl radicals, superoxide radicals, singlet oxygen, etc., to form a liquid-phase multi-oxidative substance system, thereby increasing the removal efficiency of pollutants in water

Method used

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  • Application of piezoelectric material barium titanate in ultrasonic activation of persulfate for wastewater treatment
  • Application of piezoelectric material barium titanate in ultrasonic activation of persulfate for wastewater treatment
  • Application of piezoelectric material barium titanate in ultrasonic activation of persulfate for wastewater treatment

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Embodiment 1

[0047] A method for ultrasonically activating persulfate with piezoelectric material barium titanate to treat wastewater, as follows: the piezoelectric material barium titanate powder is added to 25 mL of wastewater to be treated, the organic matter in the wastewater is ibuprofen, and the concentration is 6.0 mg / L , the dosage of piezoelectric material is 2.0g / L, the dosage of potassium persulfate is 1.00mmol / L, put it into a 110W, 40KHZ ultrasonic instrument for ultrasonic-piezoelectric degradation of pollutants for 60min. Samples were taken every 10 minutes to determine the efficiency of ultrasonic-piezoelectric material-persulfate to remove organic pollutants.

[0048] Wherein the preparation method of barium titanate is:

[0049] S1. Take 40 mL of tetraethyl titanate and slowly drop it into 400 mL of 1.0 mol / L acetic acid solution drop by drop. After magnetic stirring at room temperature for 72 hours, centrifuge at 10,000 rpm for 5 minutes. Discard the supernatant, wash t...

Embodiment 2

[0052] A method for ultrasonically activating persulfate with piezoelectric material barium titanate to treat wastewater, as follows: the piezoelectric material barium titanate powder is added to 25 mL of wastewater to be treated, the organic matter in the wastewater is ibuprofen, and the concentration is 6.0 mg / L , the dosage of piezoelectric material is 2.0g / L, the dosage of sodium persulfate is 0.5mmol / L, put it into a 110W, 40KHZ ultrasonic instrument for ultrasonic-piezoelectric degradation of pollutants for 60min. Samples were taken every 10 minutes to determine the efficiency of ultrasonic-piezoelectric material-persulfate to remove organic pollutants.

Embodiment 3

[0054] A method for ultrasonically activating persulfate with piezoelectric material barium titanate to treat wastewater, as follows: the piezoelectric material barium titanate powder is added to 25 mL of wastewater to be treated, the organic matter in the wastewater is ibuprofen, and the concentration is 6.0 mg / L , the dosage of piezoelectric material is 2.0g / L, the dosage of potassium persulfate is 0.75mmol / L, put it into a 110W, 40KHZ ultrasonic instrument for ultrasonic-piezoelectric degradation of pollutants for 60min. Samples were taken every 10 minutes to determine the efficiency of ultrasonic-piezoelectric material-persulfate to remove organic pollutants.

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Abstract

The invention discloses an application of a piezoelectric material barium titanate in ultrasonic activation of persulfate for wastewater treatment. Persulfate is activated through the combination of the piezoelectric material and ultrasonic waves, so that sulfate radicals are generated; the sulfate radical free radicals have certain oxidation capacity on pollutants, so that high degradation efficiency is achieved. Compared with a conventional method for promoting persulfate to generate sulfate radicals, the persulfate activation method provided by the invention has obvious advantages; the sulfate radical free radicals generated by piezoelectric activation of the persulfate can form a multiple oxide system with hydroxyl radicals, superoxide radicals, singlet oxygen and the like which are formed in a water body through the piezoelectric effect, so that removal efficiency of the pollutants in the water body is further improved, the removal rate of wastewater of drugs such as ibuprofen andthe like can reach 98% or above, and thus the method can be widely applied to various wastewater treatment systems.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to the application of a piezoelectric material barium titanate ultrasonically activated persulfate in wastewater treatment. Background technique [0002] In water treatment technology, advanced oxidation technology can generate extremely active free radicals (HO and SO 4 - ), compared with the traditional advanced oxidation based on hydroxyl radicals (HO ), based on sulfuric acid radicals (SO 4 - ) in the advanced oxidation technology, SO 4 - There is a lone pair of electrons, which has a higher redox potential and can be activated under alkaline conditions to oxidize and degrade organic pollutants, and the applicable pH range is wider. Relative to H in hydrogen peroxide 2 o 2 Generally speaking, persulfate has higher stability, longer action time during use, and theoretically can oxidize many types of organic pollutants, so it has broad prospects in wastewater treatm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72
CPCC02F1/72C02F2101/30
Inventor 何春彭菲胡玲玲夏德华黄雅婧张青王蕴琛廖宇宏
Owner SUN YAT SEN UNIV
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