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Method for preparing nanometer ferroferric oxide by taking waterworks sludge as raw material

A technology of ferric tetroxide and water supply sludge, applied in iron oxide/iron hydroxide, nanotechnology for material and surface science, nanotechnology, etc., can solve the problem that the composition of iron salt coagulant cannot be fully utilized, etc. problems, to avoid secondary pollution hazards, widely used, easy to operate

Inactive Publication Date: 2015-03-25
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that a large amount of iron salt coagulant components in the feedwater sludge cannot be fully utilized, and to provide a method for preparing nanometer ferric oxide from feedwater sludge

Method used

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  • Method for preparing nanometer ferroferric oxide by taking waterworks sludge as raw material
  • Method for preparing nanometer ferroferric oxide by taking waterworks sludge as raw material
  • Method for preparing nanometer ferroferric oxide by taking waterworks sludge as raw material

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specific Embodiment approach 1

[0021] Specific embodiment one: this embodiment is a kind of method for preparing nano-ferric oxide ferric oxide with water supply sludge as raw material, specifically completes according to the following steps: 1. Preparation of water supply sludge powder: first, water supply sludge is naturally dried, Then grind to a particle size of less than 100 μm to obtain the water supply sludge powder; 2. Roasting: Put the water supply sludge powder into a box-type electric furnace, heat up from room temperature to 400-900 °C at a heating rate of 5 °C / min, and Roast at 400-900°C for 1 hour, then cool naturally to room temperature to obtain roasted feedwater sludge; 3. Acid leaching extraction: add the roasted feedwater sludge to acid at a solid-to-liquid ratio of 1:20, and stir at a stirring speed 400r / min and acid leaching temperature of 50-90°C for 1h-3h, then use a vacuum filter for vacuum filtration, then use distilled water as detergent, combined with vacuum filtration to wash the ...

specific Embodiment approach 2

[0025] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the water supply sludge described in step 1 is sludge from a sedimentation tank of a water purification plant. Others are the same as the first embodiment.

specific Embodiment approach 3

[0026] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the acid described in Step 3 is hydrochloric acid with a concentration of 2 mol / L. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for preparing nanometer ferroferric oxide by taking waterworks sludge as a raw material, relates to a preparation method of nanometer ferroferric oxide and aims at solving the problem that a great number of ferric salt coagulant components in the waterworks sludge cannot be sufficiently utilized. The method comprises the steps of firstly, preparing waterworks sludge powder; secondly, roasting; thirdly, carrying out acid leaching, and extracting; fourthly, carrying out centrifugal separation; and fifthly, carrying out nanometer treatment to obtain nanometer ferroferric oxide. The method has the advantages that the method is simple and convenient to operate, no toxic byproducts are generated, the problems of secondary pollution harms and the like caused by recycle of the waterworks sludge are avoided, and the preparation cost of nanometer ferroferric oxide is reduced. The method is mainly used for preparing nanometer ferroferric oxide by taking the waterworks sludge as the raw material.

Description

technical field [0001] The invention relates to a preparation method of nano ferric oxide. Background technique [0002] In recent years, with the continuous development and improvement of water supply systems in small towns in China, some problems have also emerged, such as the discharge of a large amount of untreated water supply sludge that seriously pollutes surface water bodies. China has formulated relevant laws and regulations on the sludge discharge from water supply plants to manage the treatment and disposal of water supply sludge in small towns to reduce its harm to the environment. The treatment and disposal methods mainly include quenching and tempering, dehydration, and sanitary landfill , direct discharge, etc., but due to the huge amount of it, it will consume a lot of pharmacy costs, labor costs or mechanical equipment costs, occupy a lot of land resources, and the secondary pollution caused by the leachate of the landfill site has also attracted much attent...

Claims

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Application Information

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IPC IPC(8): C01G49/08B82Y30/00
Inventor 邹金龙孟令友代莹王涵镡英子
Owner HEILONGJIANG UNIV
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