CN101838042A - Preparation and regeneration method for water treatment defluoridation filter material based on natural mineral - Google Patents
Preparation and regeneration method for water treatment defluoridation filter material based on natural mineral Download PDFInfo
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- CN101838042A CN101838042A CN201010046560A CN201010046560A CN101838042A CN 101838042 A CN101838042 A CN 101838042A CN 201010046560 A CN201010046560 A CN 201010046560A CN 201010046560 A CN201010046560 A CN 201010046560A CN 101838042 A CN101838042 A CN 101838042A
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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
The present invention relates to a kind of preparation use and regeneration techniques of water treatment defluoridation filter material.
Technical background
Fluorine has many-sided physiological action as the essential trace element of body vital movement.But, if it is too high to take the photograph the fluorine amount, can influence calcium, the phosphorus metabolism of human body, the substance metabolism of human body and physiological function are got muddled, thereby cause fluorosis symptoms such as skeletal fluorosis, dental fluorosis.By the end of the year 2003, there are dental fluorosis patient 3,877 ten thousand people in the whole nation, and skeletal fluorosis patient 2,840,000 people have 4,194 ten thousand drinking water type Endemic Fluorosis populations need remove fluoride content and improving water quality." national drinking water of rural area safety technique Eleventh Five-Year Plan " pointed out, the Eleventh Five-Year Plan period the whole nation will solve the safe drinking water problem of 1.6 hundred million people in the countryside, strives solving national rural drinking water security with ten years.The essential measure of prevention endemic fluorine poisoning mainly contains seeks two kinds of low fluorine water source and physics and chemistry method defluorinations, when in the zone during no low fluorine water source, and necessary employing physics and chemistry method defluorination.
The method of defluorination mainly contains absorption method, electrocoagulation, reverse osmosis method, ion exchange method, chemical precipitation method and coagulation sedimentation etc.Because the cost of absorption method is lower, and defluorination effect is better, so be the important method that fluoride waste is handled always.The most frequently used defluoridation filter material is an activated alumina at present, advantages such as the maturation, defluorination effect of possessing skills is good, but because its preparation process is loaded down with trivial details, cost is high, therefore, also there is very big difficulty in the widespread use of the application in actual water treatment, especially economically underdeveloped area.In addition, aluminium silicate mineral, zeolite etc. also can be processed into defluoridation filter material, but all need carry out modified active, and adds pore-forming material, binding agent etc., has increased preparation cost greatly, has also limited its practical ranges.
Summary of the invention
Technical problem to be solved by this invention is to avoid above-mentioned existing in prior technology weak point, utilizes the bauxitic ore calcined dehydration to generate the renovation process that activated alumina prepares defluoridation filter material and defluoridation filter material.
Technical scheme of the present invention is as follows:
A kind of preparation method of the water treatment defluoridation filter material based on natural mineral is characterized in that it is raw material that selective oxidation aluminium mass percent is not less than 40% bauxite ore, and with bauxite ore reduction, the particle of 0.5-2mm is got in screening; The salt acid soak of particulate state bauxite usefulness 0.1-5mol/L 24-48 hour is soaked with tap water then and was also washed repeatedly repeatedly in 12-24 hour; Adopt gradient temperature control to calcine after the oven dry, promptly calcined 20-30 minute down at 300 ℃-400 ℃ earlier, calcined 1-2 hour down at 700 ℃-800 ℃ then, promptly get defluoridation filter material behind the cool to room temperature.
The renovation process of described water treatment defluoridation filter material, it is characterized in that the defluoridation filter material of preparation is seated in the filter post, the hydraulic detention time of fluorinated water with 1-2h flow through from the filter post, after surpassing established standards, water outlet fluorine mass concentration regenerates, promptly with soaking defluoridation filter material 24-48 hour, promptly reusable with clear water washing 3-5 time then with the 2-4mol/L inorganic aluminate.
The renovation process of described water treatment defluoridation filter material is characterized in that described established standards is that water outlet fluorine mass concentration surpasses 1mg/L.
The present invention carries out pre-treatment with particulate state bauxite with hydrochloric acid, solubilized lime carbonate wherein, and with flushing with clean water solvability product, avoid the calcium oxide of calcination of calcium carbonate generation that the pH value of solution value is raise, and reduce fluorine removing rate.
The present invention adopts gradient temperature control calcining that the segmentation of dehydration hole generative process is carried out, and makes the bauxite void distribution after the calcining more even, and specific surface area is bigger, intensity is higher.
Usefulness of the present invention is embodied in the following aspects:
1, bauxite is the very wide nonmetalliferous ore raw material in a kind of source, is used for preparing the de-fluoridation adsorbent filtrate, has characteristics with low cost, is fit to the vast backward areas of China as the modify-water material.
2, bauxite ore itself has higher intensity, directly fragmentation becomes the particulate state of 0.5-2mm, obtain high-intensity granule filter material through calcining after the pre-treatment, save the trouble that is equipped with the de-fluoridation adsorbent granulation with industrial activated alumina, reduced production cost.
3, bauxite essential mineral composition is the oxyhydroxide of aluminium, comprise diaspore or/and boehmite or/and gibbsite.The bauxite ore is through 350-800 ℃ of high-temperature calcination, and aluminium hydroxide dewaters and changes γ-Al into
2O
3Or/and α-Al
2O
3, because dehydration produces nanoporous and nanocrystalline domain structure, calcining bauxite has very high-ratio surface, high adsorption activity.Therefore, high-temperature calcination bauxite can be used as good defluorination absorbing material.
4, can carry out manipulation of regeneration with the de-fluoridation adsorbent absorption of bauxite high-temperature calcination preparation by regenerator after saturated, recover to be repeatedly used after its defluorination ability.
Description of drawings:
High resolution projection sem image shows the gibbsite tabular crystal because dehydration forms nanoporous and nanocrystalline domain structure after 500 ℃ of calcinings of Fig. 1 bauxite.
The X ray diffracting spectrum of 00 ℃ of calcining of Figure 25 bauxite, A are represented the diffraction peak of the aluminum oxide of diaspore dehydration formation, and P represents the diffraction peak of impurity agalmatolite in the bauxite.
Embodiment
Preparation method based on the water treatment defluoridation filter material of natural mineral:
1) selective oxidation aluminium mass percent is not less than 40% bauxite ore;
2) bauxite ore reduction, the particle of 0.5-2mm is got in screening;
3) particulate state bauxite is with the salt acid soak of 0.1-5mol/L 24-48 hour, soaks 24 hours with clear water then and washes 3 times, puts into baking oven again and takes out in 2 hours 102 ℃ of dryings.
4) the particulate state bauxite of handling adopts gradient temperature control to calcine, and promptly calcines 0.5 hour down at 300 ℃ earlier, calcines 1-2 hour down at 700 ℃ then, promptly gets defluoridation filter material behind the cool to room temperature.
5) defluoridation filter material filling The columns, with fluorine concentration be the simulated groundwater of 8mg/L as water inlet, carry out dynamic experiment, the water outlet fluorinion concentration is stopped using after surpassing 1mg/L, soaked 30-36 hour with the 2mol/L inorganic aluminate, use after the flushing with clean water 3 times promptly reusable then.
Claims (3)
1. preparation method based on the water treatment defluoridation filter material of natural mineral is characterized in that it is raw material that selective oxidation aluminium mass percent is not less than 40% bauxite ore, and with bauxite ore reduction, the particle of 0.5-2mm is got in screening; The salt acid soak of particulate state bauxite usefulness 0.1-5mol/L 24-48 hour is soaked with tap water then and was also washed repeatedly repeatedly in 12-24 hour; Adopt gradient temperature control to calcine after the oven dry, promptly calcined 20-30 minute down at 300 ℃-400 ℃ earlier, calcined 1-2 hour down at 700 ℃-800 ℃ then, promptly get defluoridation filter material behind the cool to room temperature.
2. the renovation process of the described water treatment defluoridation filter material of claim 1, it is characterized in that the defluoridation filter material of preparation is seated in the filter post, the hydraulic detention time of fluorinated water with 1-2h flow through from the filter post, after surpassing established standards, water outlet fluorine mass concentration regenerates, promptly soaked defluoridation filter material 24-48 hour with the 2-4mol/L inorganic aluminate, promptly reusable with clear water washing 3-5 time then.
3. the renovation process of the described water treatment defluoridation filter material of claim 2 is characterized in that described established standards is that water outlet fluorine mass concentration surpasses 1mg/L.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102614849A (en) * | 2012-03-26 | 2012-08-01 | 西安建筑科技大学 | Preparation method of water body fluoride removal material |
| CN102718234A (en) * | 2012-07-12 | 2012-10-10 | 张勇 | Method for extracting lithium carbonate from lepidolite |
| CN102795700A (en) * | 2011-05-24 | 2012-11-28 | 中国科学院地理科学与资源研究所 | Defluorinating agent for naturally treating high-fluorine hot spring drinking water and application method thereof |
| CN103349974A (en) * | 2013-06-14 | 2013-10-16 | 河海大学 | Spherical hydroxyapatite fluoride-removing material regenerated powder and application thereof |
| CN103880097A (en) * | 2014-03-21 | 2014-06-25 | 苏州腾纳环保科技有限公司 | Novel environmental-friendly water purification filter material |
| CN104923150A (en) * | 2014-03-19 | 2015-09-23 | 中国科学院生态环境研究中心 | Lanthanum-loaded activated aluminium oxide defluorinating adsorbent and preparation method thereof |
| CN109248648A (en) * | 2018-10-25 | 2019-01-22 | 福州大学 | A kind of modified bauxite for adsorption treatment heavy metal ions in wastewater |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4159246A (en) * | 1975-09-10 | 1979-06-26 | Kohei Deguchi | Removal of fluorine from water |
| CN1037465A (en) * | 1988-05-10 | 1989-11-29 | 天津市公用事业科学技术研究所 | Defluoridation filter material and application method thereof |
| CN1421404A (en) * | 2001-11-27 | 2003-06-04 | 中国科学院生态环境研究中心 | Drinking water defluorinating process and equipment |
| CN101028945A (en) * | 2006-02-27 | 2007-09-05 | 权力敏 | Fluorine-removing biological sterilizer for water source |
| CN101007261B (en) * | 2006-12-17 | 2010-05-12 | 于向真 | Zeolite adsorbent and its preparation method |
-
2010
- 2010-01-19 CN CN201010046560A patent/CN101838042B/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102795700A (en) * | 2011-05-24 | 2012-11-28 | 中国科学院地理科学与资源研究所 | Defluorinating agent for naturally treating high-fluorine hot spring drinking water and application method thereof |
| CN102614849A (en) * | 2012-03-26 | 2012-08-01 | 西安建筑科技大学 | Preparation method of water body fluoride removal material |
| CN102614849B (en) * | 2012-03-26 | 2014-04-16 | 西安建筑科技大学 | Preparation method of water body fluoride removal material |
| CN102718234A (en) * | 2012-07-12 | 2012-10-10 | 张勇 | Method for extracting lithium carbonate from lepidolite |
| CN102718234B (en) * | 2012-07-12 | 2014-05-14 | 张勇 | Method for extracting lithium carbonate from lepidolite |
| CN103349974A (en) * | 2013-06-14 | 2013-10-16 | 河海大学 | Spherical hydroxyapatite fluoride-removing material regenerated powder and application thereof |
| CN103349974B (en) * | 2013-06-14 | 2015-04-29 | 河海大学 | Spherical hydroxyapatite fluoride-removing material regenerated powder and application thereof |
| CN104923150A (en) * | 2014-03-19 | 2015-09-23 | 中国科学院生态环境研究中心 | Lanthanum-loaded activated aluminium oxide defluorinating adsorbent and preparation method thereof |
| CN103880097A (en) * | 2014-03-21 | 2014-06-25 | 苏州腾纳环保科技有限公司 | Novel environmental-friendly water purification filter material |
| CN109248648A (en) * | 2018-10-25 | 2019-01-22 | 福州大学 | A kind of modified bauxite for adsorption treatment heavy metal ions in wastewater |
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| CN101838042B (en) | 2012-09-26 |
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