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Method for treating water by using singlet oxygen produced from peroxymonosulfate under induction of inorganic solid peroxide

A peroxide and inorganic solid technology, applied in the field of water treatment, can solve problems such as easy self-decomposition, secondary pollution, complex operation and safety hazards, and achieve the effects of stable chemical properties, simple and easy operation, and convenient transportation and storage

Active Publication Date: 2014-02-05
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of this invention is to provide a kind of water treatment method that utilizes inorganic solid peroxide to induce persulfate to produce singlet oxygen, solve following problem: (1) produce singlet oxygen in photosensitization method and need to add light source, it is difficult to Large-scale application, and the introduction of photosensitizer will produce secondary pollution; (2) chemical reaction method (H 2 o 2 -ClO - ) The singlet oxygen generated instantaneously in ) has a large amount, is easy to self-decompose, and is difficult to be efficiently utilized by pollutants, and the liquid hydrogen peroxide and hypochlorous acid solution or chlorine gas is inconvenient to transport and store, and the operation is complicated and there are potential safety hazards

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  • Method for treating water by using singlet oxygen produced from peroxymonosulfate under induction of inorganic solid peroxide

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specific Embodiment approach 1

[0014] Embodiment 1: This embodiment is a water treatment method that utilizes inorganic solid peroxide to induce persulfate to produce singlet oxygen, which is achieved through the following steps: combine inorganic solid peroxide and persulfate According to the mass ratio of 1: (0.5 ~ 5), it is added to the water to be treated, stirred, and the concentration of persulfate in the water to be treated is controlled to be 0.3 ~ 300mg / L, and the hydraulic retention reaction is 5 ~ 60min, that is, the utilization of inorganic Water treatment for generating singlet oxygen from peroxymonosulfate induced by solid peroxide; wherein, the water to be treated is source water and sewage.

[0015] The inorganic solid peroxide and persulfate in this embodiment are stored separately before use.

[0016] 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 separatel...

specific Embodiment approach 2

[0019] 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

[0020] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: permonosulfate is sodium persulfate (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 water by using singlet oxygen produced from peroxymonosulfate under induction of inorganic solid peroxide and relates to a water treatment method. The water treatment method is used for solving the problems of a photosensitive method for generating singlet oxygen that a light source needs to be additionally added, secondary pollution is caused, and the utilization rate of singlet oxygen generated by adopting a chemical method is low. The method for treating water comprises the following steps: adding the inorganic solid peroxide and the peroxymonosulfate to water, reacting and stirring so as to complete the water treatment, wherein the water to be treated is source water and wastewater. According to the water treatment method, after the peroxide is dissolved in water, hydrogen peroxide slowly released reacts with the peroxymonosulfate rapidly to continuously generate the low-concentration high-activity singlet oxygen which can be efficiently utilized by pollutants, the self decomposition of the singlet oxygen is reduced, and the utilization rate of the singlet oxygen is increased. The method has the advantages that the pollution removal efficiency is high, no poisonous or harmful byproducts are generated, the additional equipment is not needed; and as solid reagents, the inorganic solid peroxide and the peroxymonosulfate are convenient to transport and store and are suitable for emergency treatment.

Description

technical field [0001] The invention relates to a water treatment method, in particular to a water treatment method using inorganic solid peroxide to induce persulfate to generate singlet oxygen. Background technique [0002] singlet oxygen ( 1 o 2 ) is a molecular oxygen in excited state, and superoxide radical (O 2 -· ), hydroxyl radical (OH), sulfate radical (SO 4 ·- ) and other reactive oxygen species, chemical properties are lively and unstable, and widely exist in nature. It is one of the longest active oxygen species involved in the fields of chemistry, environment, and medicine. After oxidation, no toxic and harmful by-products are produced, and it is a green and environment-friendly oxidant. [0003] At present, the methods for generating singlet oxygen mainly include photosensitization and chemical methods. The generation of singlet oxygen by photosensitization involves a photoexcitation process, a photosensitizer (rose bengal, eosin, methylene blue, fluores...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72
Inventor 庞素艳江进王强鲁雪婷郭晓瑜黄亮郭仕达王玲
Owner HARBIN UNIV OF SCI & TECH
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