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Method for degrading organic wastewater by hydroxylamine hydrochloride reinforced iron oxide activated persulfate

A technology for activating persulfate and iron oxides, applied in chemical instruments and methods, oxidized water/sewage treatment, water pollutants, etc. and other problems, to achieve the effect of reducing cost, low cost and improving degradation rate

Inactive Publication Date: 2016-05-04
SINOPEC YIZHENG CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention is in order to solve existing [Fe 2+ ] / [Persulfate] The oxidation reaction of the oxidation system is too fast, which limits the degradation rate of pollutants and produces a large amount of iron sludge to be treated. It provides a method for strengthening iron oxide with hydroxylamine hydrochloride to activate persulfate to degrade organic wastewater.

Method used

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  • Method for degrading organic wastewater by hydroxylamine hydrochloride reinforced iron oxide activated persulfate
  • Method for degrading organic wastewater by hydroxylamine hydrochloride reinforced iron oxide activated persulfate
  • Method for degrading organic wastewater by hydroxylamine hydrochloride reinforced iron oxide activated persulfate

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Embodiment 1

[0032] A method for hydroxylamine hydrochloride to strengthen iron oxides to activate persulfate to degrade organic waste water, comprising the following steps:

[0033] Put 1L of simulated wastewater containing 0.1mmol / L Orange G (sodium 1-phenylazo-2-naphthol-6,8-disulfonate) into the reactor, add 0.5mmol hydroxylamine hydrochloride, and adjust the pH to 3. Add 0.5g ferric oxide and 1mmol potassium persulfate to it, and react at room temperature for 30min.

[0034] figure 1 Represented in is the time-removal rate curve graph that only adds persulfate to degrade organic wastewater and utilizes the hydroxylamine hydrochloride of embodiment 1, activator ferric oxide and persulfate to degrade organic wastewater. Depend on figure 1 It can be seen that the removal rate of only adding persulfate oxidation is only about 10% at 30 min, while the removal rate of hydroxylamine hydrochloride-enhanced iron oxide activated persulfate oxidation can be as high as 99%. It shows that the h...

Embodiment 2

[0038] A method for hydroxylamine hydrochloride to strengthen iron oxides to activate persulfate to degrade organic waste water, comprising the following steps:

[0039] Put 1L of simulated wastewater containing orange G (the initial concentration of orange G is 0.1mmol / L) in the reactor, add 0.5mmol of hydroxylamine hydrochloride, adjust the pH to 3, and then add 0.5g of iron sludge and 1mmol of persulfate Potassium hydrogen, reacted at room temperature for 30min.

[0040] Depend on Figure 4 It can be seen that the oxidation rate of hydroxylamine hydrochloride-enhanced iron oxide-activated persulfate system is much higher than that of only iron oxide-activated persulfate system. The degradation rate of orange G activated by iron oxide persulfate oxidation is only about 37% in 30 minutes, but the present invention can reach more than 99% in 10 minutes after strengthening with hydroxylamine hydrochloride.

Embodiment 3

[0042] A method for hydroxylamine hydrochloride to strengthen iron oxides to activate persulfate to degrade organic waste water, comprising the following steps:

[0043] Put 1L of simulated wastewater containing orange G (the initial concentration of orange G is 0.1mmol / L) in the reactor, add 0.5mmol of hydroxylamine hydrochloride, adjust the pH to 3, and then add 0.5g of ferric oxide and 1mmol Potassium hydrogen persulfate was reacted at room temperature for 30 minutes. It is measured that the removal rate of orange G of the present invention can reach 71% in 30 minutes.

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Abstract

The invention discloses a method for degrading organic wastewater by hydroxylamine hydrochloride reinforced iron oxide activated persulfate, and belongs to the technical field of water treatment. The method comprises the following specific steps: mixing hydroxylamine hydrochloride with wastewater to be pretreated; regulating pH (potential of hydrogen) to weak acidity; adding iron oxide and persulfate, and stirring at room temperature until reaction is complete; separating and recovering the iron oxide by adopting an external magnetic field to obtain purified wastewater, wherein proportion of organic matter to hydroxylamine hydrochloride to the iron oxide to the persulfate in the wastewater is 1 mmol: (5 to 10 mmol): 5mg: (10 to 30 mmol). A sulfate radical anion with strong oxidizing property is generated by the hydroxylamine hydrochloride reinforced iron oxide activated persulfate, therefore organic pollutants in a water body are removed. By adopting the method disclosed by the invention to remove the organic pollutants in the water, a removal rate can reach 70 percent to 99 percent in 30 minutes. The method disclosed by the invention is simple to operate, high in efficiency and low in operating cost, and has a broad application prospect in the field of advanced wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to a method for strengthening iron oxide with hydroxylamine hydrochloride to activate persulfate to degrade organic wastewater. Background technique [0002] For a long time, the treatment of refractory organic wastewater in the environment has been a difficult point in water treatment technology. Taking dye wastewater as an example, it is highly polluted, difficult to degrade, and has a large total discharge. At present, the industry usually adopts a treatment process combining chemical and biological methods. But most of the operations are complicated, and the treatment effect is sometimes not optimistic. [0003] Advanced oxidation technology refers to the use of strong oxidizing free radicals to react with pollutants such as addition, substitution, bond breaking, and ring opening to transform organic matter into easily degradable small molecular substances. Advanced ox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/12C02F1/72C02F101/30
CPCC02F9/00C02F1/488C02F1/66C02F1/72C02F2101/30
Inventor 朱亮陈梦妍张静
Owner SINOPEC YIZHENG CHEM FIBER
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