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A method for treating reverse osmosis concentrate by using secondary iron minerals to activate persulfate

A reverse osmosis concentrate, monosulfate technology, applied in chemical instruments and methods, oxidized water/sewage treatment, special compound water treatment, etc., can solve the problems of sulfate radical quenching, limited application, etc. Scale and corrosion, simple and easy operation, high decontamination efficiency

Active Publication Date: 2020-09-04
HARBIN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Sulfate radical (SO 4 ·－ ) is highly oxidizing, and the redox potential under neutral pH conditions is higher than that of hydroxyl radicals (OH), which can theoretically oxidize most organic matter, but the various anions in the reverse osmosis concentrate can easily convert sulfate Free radical quenching, which greatly limits its use in reverse osmosis concentrate treatment

Method used

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  • A method for treating reverse osmosis concentrate by using secondary iron minerals to activate persulfate
  • A method for treating reverse osmosis concentrate by using secondary iron minerals to activate persulfate
  • A method for treating reverse osmosis concentrate by using secondary iron minerals to activate persulfate

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specific Embodiment approach 1

[0026] Specific embodiment one: a kind of method of utilizing secondary iron mineral activation peroxosulfate of the present embodiment to process reverse osmosis concentrated solution, it is realized by following steps:

[0027] 1. Add the crushed secondary iron minerals that pass through a 200-mesh sieve into the water to be treated by reverse osmosis, and perform reverse osmosis treatment;

[0028] 2. Add peroxymonosulfate to the reverse osmosis concentrated solution after the reverse osmosis treatment in step one, stir, control the mass ratio of catalyst and peroxymonosulfate to be 1: (1~10), and control the concentration of peroxomonosulfate to be 100 ~5000mg / L, the hydraulic retention time is 30~180min, that is, the use of secondary iron minerals to activate persulfate to treat the reverse osmosis concentrate.

specific Embodiment approach 2

[0029] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the described permonosulfate is potassium peroxosulfate, sodium peroxosulfate, ammonium permonosulfate, calcium peroxosulfate, magnesium peroxosulfate One or more mixtures mixed in any proportion. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0030] Embodiment 3: This embodiment is different from Embodiment 1 in that: the secondary iron mineral is Shi's mineral. Others are the same as in the first embodiment.

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Abstract

The invention discloses a method for treating reverse osmosis concentrate by utilizing peroxymonosulfate activated by secondary iron ore and relates to a treatment method of the reverse osmosis concentrate. The treatment method disclosed by the invention comprises the following steps: adding biosynthetic Schwertmannite into to-be-treated water, performing reverse osmosis treatment, adding peroxymonosulfate into the reverse osmosis concentrate, stirring, reacting, and precipitating to obtain the effluent, thereby obtaining the product. Some heavy metal ions can be adsorbed from the Schwertmannite, and organic matters and the peroxymonosulfate can be adsorbed onto the mineral surface, so that a Fenton-like reaction is carried out between the peroxymonosulfate and Fe3+ on the surface of the Schwertmannite to produce SO4.-, and the organic matters are further degraded until the mineralization process of the organic matters is completed. The method disclosed by the invention has the characteristics that the secondary iron ore and peroxymonosulfate are environment-friendly, the pollutant removal efficiency is high, no toxic or harmful by-product is produced, the product is simple and readily available, and the method is a high-efficiency reverse osmosis concentrate treatment method integrating heavy metal removal and oxidative decontamination.

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 secondary iron minerals to activate permonosulfate (PMS). Background technique [0002] Reverse osmosis treatment technology is a membrane separation and filtration technology driven by pressure difference, which has the advantages of low energy consumption, simple operation, small system footprint, and good treatment effect. Development, improvement of pretreatment technology, etc., the cost of reverse osmosis treatment technology has been decreasing 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 backwater, the impurities in the influent water are highly concentrated, which can produce reverse osmosi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72
CPCC02F1/725C02F2305/026
Inventor 郭钦刘奋武庞素艳段杰斌
Owner HARBIN UNIV OF SCI & TECH
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