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Method for treating water by using steel slag to catalyze ozone

A technology for water treatment and steel slag, which is applied in the fields of oxidized water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc. It can solve the problems of poor pollutant removal effect, high catalyst cost and low reaction efficiency, etc. Achieving the effect of low price, high catalytic activity, and improved removal rate and efficiency

Inactive Publication Date: 2017-06-06
NORTHEASTERN UNIV LIAONING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention solves the problems of low reaction efficiency in the single ozonation water treatment method, high catalyst cost, complex preparation, and poor pollutant removal effect of the existing catalytic ozonation water treatment method, and provides a water catalyzed ozone catalyst using steel slag. Approach

Method used

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  • Method for treating water by using steel slag to catalyze ozone

Examples

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Comparison scheme
Effect test

Embodiment 1

[0012] Add 20g / L steel slag to the reactor containing sewage (the concentration of p-chlorobenzoic acid is 50mg / L), and then introduce ozone for aeration. The ozone inlet concentration is 1mg / L, and the inlet flow rate is 0.2L / min, the residence time of wastewater in the reactor is 30min.

[0013] Depend on figure 1 The comparison of the p-chlorobenzoic acid removal rate curves of single ozonation and steel slag catalytic ozonation shows that the p-chlorobenzoic acid removal rate of single ozonation 2h is only 15%.

Embodiment 2

[0015] Add 50g / L steel slag to the reactor containing the water to be treated, and use ozone to aerate the water to be treated with the steel slag added. The ozone intake concentration is 30mg / L, and the intake flow rate is 0.6L / min. The residence time of the water to be treated in the reactor is 60min.

[0016] Depend on figure 1 The comparison of the p-chlorobenzoic acid removal rate curves of single ozonation and steel slag catalytic ozonation shows that the removal rate of p-chlorobenzoic acid can reach more than 82% after 1h of steel slag catalytic ozonation.

Embodiment 3

[0018] Add 50g / L steel slag to the reactor containing the water to be treated, and use ozone to aerate the water to be treated with the steel slag added. The ozone intake concentration is 15mg / L, and the intake flow rate is 1.0L / min. The residence time of the water to be treated in the reactor is 120min.

[0019] Depend on figure 1 The comparison of the p-chlorobenzoic acid removal rate curves of single ozonation and steel slag catalytic ozonation shows that the removal rate of p-chlorobenzoic acid can reach more than 98% after 2 hours of steel slag catalytic ozonation.

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Abstract

The invention relates to a method for treating water by using steel slag to catalyze ozone, aiming at solving the problems that a method for treating the water by using ozonization alone is low in reaction efficiency, and the existing method for treating the water by using catalytic ozonization is high in catalyst cost, complicated in preparation, poor in pollutant removal effect, and the like. The method provided by the invention comprises the steps of adding the steel slag into a reactor containing sewage, wherein 1-50g of steel slag is put into per liter of water to be treated; then, continuously replenishing the reactor with 0.5-3.0mg / L ozone, and controlling the reaction time to be 5-120min so as to realize the removal of organic matters in the water. The method has the characteristics that a catalyst is easy to obtain, low in cost, high in activity, long in service life, rapid in reaction speed and high in removal efficiency, can treat waste by using waste, is simple to operate, and the like. After the method for treating the water by using the steel slag to catalyze the ozone is used, the removal rate of parachlorobenzoic-acid reaches 98% or above.

Description

technical field [0001] The invention relates to a water treatment method using steel slag to catalyze ozone, in particular to a method for using a catalyst to strengthen ozone oxidation to remove refractory organic pollutants in water. Background technique [0002] The oxidation-reduction point of ozone under standard conditions is 2.07eV, which can quickly and efficiently remove organic matter in water. Under the action of the catalyst, ozone decomposition produces more oxidative and non-selective hydroxyl radicals (OH, the redox point of which is 2.80eV under standard conditions), which can greatly improve the removal efficiency of refractory organic matter in water. There have been large-scale research and applications in the field of water treatment. [0003] Steel slag is a solid waste produced in the steelmaking process. Its comprehensive utilization rate is low and its stockpile is large. It is often used as artificial wetland filler, soil conditioner or building mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/78C02F101/36C02F101/34
Inventor 胡恩柱李秋燕王娜娜钟圣俊薛向欣
Owner NORTHEASTERN UNIV LIAONING
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