Preparation and regeneration method for water treatment defluoridation filter material based on natural mineral

A natural mineral and water treatment technology, applied in filter regeneration, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of cumbersome preparation process, difficulty in wide application, limited application scope, etc., and achieve pore distribution. The effect of uniformity, low cost and lower production cost

Inactive Publication Date: 2010-09-22
HEFEI UNIV OF TECH
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  • Abstract
  • Description
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Problems solved by technology

At present, the most commonly used fluoride removal filter material is activated alumina, which has the advantages of mature technology and good fluoride removal effect, but due to its cumbersome preparation process and high cost, its application in actual water treatment, especially in economically underdeveloped areas There are still great difficulties in the wide application of
In addition, aluminosilicate minerals, zeolites, etc. can also be processed into fluorine-removing filter materials, but all need to be modified and activated, and pore-forming agents, binders, etc. are added, which greatly increases the preparation cost and limits its practical application. scope

Method used

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  • Preparation and regeneration method for water treatment defluoridation filter material based on natural mineral
  • Preparation and regeneration method for water treatment defluoridation filter material based on natural mineral
  • Preparation and regeneration method for water treatment defluoridation filter material based on natural mineral

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Embodiment Construction

[0019] Preparation method of water treatment defluoridation filter material based on natural minerals:

[0020] 1) Select bauxite ore with a mass percentage of alumina not less than 40%;

[0021] 2) The bauxite ore is crushed and sieved to get 0.5-2mm particles;

[0022] 3) The granular bauxite is soaked in 0.1-5mol / L hydrochloric acid for 24-48 hours, then soaked in water for 24 hours and washed 3 times, then put into an oven and dried at 102°C for 2 hours and taken out.

[0023] 4) The treated granular bauxite is calcined by gradient temperature control, that is, calcined at 300°C for 0.5 hour, then calcined at 700°C for 1-2 hours, and cooled to room temperature to obtain the fluorine-removing filter material.

[0024] 5) Fill the experimental column with fluorine-removing filter material, use simulated groundwater with a fluorine concentration of 8mg / L as the influent, and conduct dynamic experiments. Stop using the effluent when the fluoride ion concentration exceeds 1mg / ...

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Abstract

The invention discloses a preparation and regeneration method for water treatment defluoridation filter material based on a natural mineral. The invention is that natural bauxite ores are used as raw materials, are roasted at high temperature at two stages after crushing, screening and pretreatment through hydrochloric acid, and finally are cooled to obtain the defluoridation filter material. After the defluoridation filter material loses efficacy, the defluoridation filter material can be reused after inorganic aluminum salt solution is used for soaking the defluoridation filter material. The invention has the advantages that the water treated by using the defluoridation filter material can fully satisfy the standard that fluorine content in drinking water is lower than 1.0mg/L, the source of the raw materials is wide, the preparation is simple and convenient, the cost is low and the application prospect is good.

Description

technical field [0001] The invention relates to a technology for preparing, using and regenerating a water treatment defluoridation filter material. technical background [0002] As a trace element necessary for the life activities of the body, fluorine has various physiological functions. However, if the fluorine intake is too high, it will affect the calcium and phosphorus metabolism of the human body, and cause the material metabolism and physiological functions of the human body to be disordered, resulting in symptoms of fluorosis such as skeletal fluorosis and dental fluorosis. By the end of 2003, there were 38.77 million patients with dental fluorosis and 2.84 million patients with skeletal fluorosis nationwide. There were 41.94 million people in drinking water-type endemic fluorosis areas who needed defluoridation and improved water. The "National Rural Drinking Water Safety Project "Eleventh Five-Year" Plan" pointed out that during the "Eleventh Five-Year Plan" peri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/58B01J20/08B01J20/34C02F101/14
Inventor 苏馈足陈天虎袁守军胡真虎王超史亚丹王延明
Owner HEFEI UNIV OF TECH
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