Method for treating reverse osmosis concentrated solution by using singlet oxygen produced from peroxymonosulfate under induction of inorganic solid peroxide

A technology of reverse osmosis concentrate and peroxide, applied in the direction of oxidized water/sewage treatment, etc., can solve the problems of complex process operation, short survival time, large instantaneous production volume, etc., and achieve good decontamination effect and high decontamination efficiency , easy operation effect

Active Publication Date: 2014-02-05
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

The generation of singlet oxygen by this chemical method is fast, and its second-order reaction rate constant is about 10 4 m -1 the s -1 , that is, the instantaneous production is large, the self-decomposition speed is fast, the survival time is short, and the utilization rate of organic matter is low; the chemical reagent is liquid hydrogen peroxide and hypochlorous acid solution or chlorine gas, the transportation and storage are inconvenient, the process operation is complex and there are potential safety hazards question

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  • Method for treating reverse osmosis concentrated solution by using singlet oxygen produced from peroxymonosulfate under induction of inorganic solid peroxide
  • Method for treating reverse osmosis concentrated solution by using singlet oxygen produced from peroxymonosulfate under induction of inorganic solid peroxide

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specific Embodiment approach 1

[0016] Embodiment 1: This embodiment is a method of using inorganic solid peroxide to induce persulfate to generate singlet oxygen to treat reverse osmosis concentrate, which is realized by the following steps: combining inorganic solid peroxide and peroxide Monosulfate is added to the reverse osmosis concentrate according to the mass ratio of 1:(0.5~5), stirred, and the concentration of peroxysulfate is controlled to 100~5000mg / L, and the hydraulic retention reaction is 5~60min, that is, the utilization of inorganic Solid peroxide induces singlet oxygen generation from peroxymonosulfate to treat reverse osmosis concentrate.

[0017] The inorganic solid peroxide and persulfate in this embodiment are stored separately before use.

[0018] The inorganic solid peroxide and peroxymonosulfate described in this embodiment can be made into powder reagents according to the mass ratio of 1:(0.5-5) and added together or added separately, which is the dry-type addition method; The inorg...

specific Embodiment approach 2

[0021] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the inorganic solid peroxide is sodium peroxide (Na 2 o 2 ), calcium peroxide (CaO 2 ), magnesium peroxide (MgO 2 ), barium peroxide (BaO 2 ), sodium percarbonate (Na 2 CO 4 ), potassium percarbonate (K 2 CO 4 ) in one or several mixtures in any ratio. Other parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0022] Specific embodiment three: this embodiment is different from specific embodiment one or two: permonosulfate is sodium peroxosulfate (NaHSO 5 ), potassium persulfate (KHSO 5 ), ammonium persulfate (NH 4 HSO 5 ), calcium persulfate (Ca(HSO 5 ) 2 ), magnesium persulfate (Mg(HSO 5 )2 ) in one or several mixtures in any ratio. Other parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention provides a method for treating a reverse osmosis concentrated solution by using singlet oxygen produced from peroxymonosulfate under induction of inorganic solid peroxide and relates to a reverse osmosis concentrated solution treatment method. The reverse osmosis concentrated solution treatment method comprises the following steps: adding the inorganic solid peroxide and the peroxymonosulfate to the reverse osmosis concentrated solution and stirring so as to complete the reverse osmosis concentrated solution treatment. According to the reverse osmosis concentrated solution treatment method, after the peroxide is dissolved in water, released hydrogen peroxide rapidly reacts with the peroxymonosulfate to generate the high-activity singlet oxygen, and the generated singlet oxygen with strong oxidizing property can rapidly react with pollutants, oxidizes organic matters and inactivates microorganisms, thus achieving a good pollutant removal effect. As environmentally-friendly reagents, the inorganic solid peroxide and the peroxymonosulfate do not generate poisonous and harmful byproducts in the oxidative degradation process, and after the solution is treated, water can be directly discharged into a municipal sewage treatment system; and as solid reagents, the inorganic solid peroxide and the peroxymonosulfate can be directly added for use without need of additional equipment. The reverse osmosis concentrated solution treatment method has the advantages that the operation is simple and practicable and the reagents are convenient to transport and store.

Description

technical field [0001] The invention relates to a method for treating reverse osmosis concentrated liquid, in particular to a method for treating reverse osmosis concentrated liquid by using inorganic solid peroxide to induce persulfate to generate singlet oxygen. Background technique [0002] Reverse osmosis treatment technology (RO) is a membrane separation and filtration technology powered by pressure difference. It has the advantages of low energy consumption, easy operation, small system footprint, and good treatment effect. With the development of recovery system and the improvement of pretreatment technology, the cost of reverse osmosis treatment technology has decreased year by year. At present, it has been widely used in scientific research, medicine, food, beverage, seawater desalination, environmental protection and other fields. [0003] However, while reverse osmosis technology is used to produce recycled water, the impurities in the influent water are concentr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72
Inventor 庞素艳郭晓瑜王强江进鲁雪婷黄亮郭仕达王玲
Owner HARBIN UNIV OF SCI & TECH
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