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Preparation method of hyperstable self-supported manganese dioxide water treatment membrane

A manganese dioxide film and manganese dioxide technology are applied in the fields of oxidized water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc., which can solve the problems of poor stability and easy dispersion of manganese dioxide film, and achieve broad industrial applications Foreground effect

Active Publication Date: 2017-06-13
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing an ultra-stable self-supporting manganese dioxide water treatment membrane in order to solve the problem of poor stability and easy dispersion of the existing manganese dioxide membrane in water

Method used

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  • Preparation method of hyperstable self-supported manganese dioxide water treatment membrane
  • Preparation method of hyperstable self-supported manganese dioxide water treatment membrane
  • Preparation method of hyperstable self-supported manganese dioxide water treatment membrane

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specific Embodiment approach 1

[0021] Specific embodiment one: the preparation method of a kind of ultra-stable self-supporting manganese dioxide water treatment membrane of the present embodiment is carried out according to the following steps:

[0022] 1. Evenly disperse manganese dioxide in deionized water to obtain a dispersion, then place the filter membrane in a negative pressure suction filtration device, and then use a negative pressure suction filtration device with a filter membrane to filter the dispersion liquid, Finally, a manganese dioxide film layer is obtained on the surface of the filter membrane;

[0023] The concentration of manganese dioxide in the dispersion liquid described in step 1 is 0.5g / L~1g / L;

[0024] The thickness of the manganese dioxide film layer described in step 1 is 10 μm to 50 μm;

[0025] Two, add oxidizing agent in cross-linking agent, obtain the mixed solution of oxidizing agent and cross-linking agent after mixing evenly, then pass the mixed solution of oxidizing ag...

specific Embodiment approach 2

[0033] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the microscopic morphology of manganese dioxide described in step 1 is one or more of linear, rod, hollow tubular, fibrous and lamellar. combination. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0034] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the size specification of the linear manganese dioxide is: a diameter of 10 nm to 30 nm, and a length of 10 μm to 20 μm. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a preparation method of a manganese dioxide water treatment membrane, in particular to a preparation method of a hyperstable self-supported manganese dioxide water treatment membrane. The method aims at solving the problems that an existing manganese dioxide membrane is poor in stability and likely to disperse in water. The method includes the steps that firstly, manganese dioxide is dispersed into deionized water, and a manganese dioxide membrane layer is formed on the surface of a filter membrane after suction filtration; secondly, a crosslinking agent mixed with an oxidizing agent passes through the filter membrane, and filtration is repeatedly carried out; thirdly, the filter membrane carrying the manganese dioxide membrane is taken down, stripping is carried out after drying, and the hyperstable self-supported manganese dioxide membrane is obtained. The manganese dioxide membrane prepared with the method can exist in water stably without dispersing; the manganese dioxide membrane can be used for filtering water for a long term with a certain porosity, can remove heavy metal in water by adsorption in water filtration and also can catalyze an oxidizing agent added in water, and thus persistent organic pollutants in water can be decomposed and removed; the manganese dioxide membrane can be widely applied to the field of removal and purification of micropollutants in water.

Description

technical field [0001] The invention relates to a preparation method of a manganese dioxide water treatment membrane. Background technique [0002] Manganese dioxide, as a metal oxide with a wide range of uses and economical availability, is widely used in water treatment, industrial catalysis, environmental adsorption, battery capacitors and other fields. In terms of water treatment, manganese dioxide has a good selective adsorption effect on metal ions, and is often used to treat heavy metal polluted wastewater; at the same time, manganese dioxide has a strong catalytic ability, so it is also often used to catalyze the refractory degradation in water. organic matter. However, at present, manganese dioxide materials are often used in the form of powder dosing, which has disadvantages such as large usage and difficulty in recycling. Therefore, seeking a special form of manganese dioxide for use in water treatment has become a research hotspot. [0003] As a separation medi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/32B01J20/26C02F1/28C02F1/72B01J20/28B01J20/30C02F101/20C02F101/30
CPCB01J20/06B01J20/26B01J20/28033B01J31/32C02F1/288C02F1/725C02F2101/20C02F2101/30
Inventor 马军孙志强王盼盼刘晴靓
Owner HARBIN INST OF TECH
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