CN101428208A - Methods for producing and using high-efficiency defluorination adsorption agent - Google Patents
Methods for producing and using high-efficiency defluorination adsorption agent Download PDFInfo
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- CN101428208A CN101428208A CNA2007101769196A CN200710176919A CN101428208A CN 101428208 A CN101428208 A CN 101428208A CN A2007101769196 A CNA2007101769196 A CN A2007101769196A CN 200710176919 A CN200710176919 A CN 200710176919A CN 101428208 A CN101428208 A CN 101428208A
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- fluorine
- iron
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Abstract
The invention relates to a technique for preparing an absorbing material capable of effectively removing excessive fluorine from drinking water, and an application method thereof. For the invention, natural sea bed iron-manganese concretion is adopted as the raw material which is pulverized to ensure that the raw material is within a certain granularity range. To obtain the required drinking water fluorine removal sorbent, all that is needed is to subject the raw material to modification by iron trichloride so that ferric ions Fe<3+> and hydroxide thereof can adhere to iron-manganese concretion. The sorbent has the characteristics of cleanness, harmlessness, low cost, large fluorine adsorption capacity, high efficiency of difluoridation, stable performance and suitability for drinking water difluoridation processes of various scales. The material can be taken as a filter material for a filter, so that 90% of fluorine can be removed at a temperature of 20 DEG C and pH of 5-7. Purified water after being treated by the method can satisfy the sanitary standards for drinking water in China.
Description
Technical field the invention belongs to water-treatment technology field, and particularly a kind of water treatment is with the preparation of de-fluoridation adsorbent and the defluorination application process that adapts with it.De-fluoridation adsorbent of the present invention and matching method can effectively be removed fluorine excessive in the former water, fluorine content during effectively control is purified waste water.
The technical background fluorine is one of trace element of needed by human, and (0.5～1.0mg/L) is that to keep bone and tooth development institute requisite to an amount of fluorine.Drinking water is a main source of taking in fluorine, and the high-fluorine water that the long-term drinking fluorinated volume is higher than 1.5mg/L can cause chronic fluorine poisoning, tooth, bone, nervous system, digestive system, respiratory system and reproductive system is produced poison.In addition, food, industrial pollution, medicine, cosmetics etc. also are other fluorine sources of fluorine poisoning.All there is high-fluorine water in many areas, the world, and the drinking water type fluorine poisoning is numerous.Except that Shanghai and Hainan, other 31 provinces all have fluorine poisoning in various degree to take place in China, and main generation area concentrates on the each province to the north of the Changjiang river, are the widest endemic diseases of China's distribution.Fluorine poisoning distributes and distributes with the drinking water fluoride concentration is consistent.The fluorine content of drinking water maximum reach 14.0mg/L, and the safety margin of fluoride is 1.0mg/L in the drinking water.In order effectively to prevent the harm of drinking water fluorine poisoning, must handle high-fluorine water.In general, defluorination method comprises absorption method, ion-exchange, chemical precipitation method, Coagulation Method, electroosmose process, hyperfiltration and film exchange process etc.The method of excessive fluoride is an absorption method in the removal high-fluorine water commonly used both at home and abroad.The most general adsorbent is activated alumina and activated carbon.The former adsorption capacity is little; The latter pH scope of application is little, needs to regulate the pH value, thereby causes the processing cost height.
It is raw material that summary of the invention the present invention adopts cheap natural seabed iron-manganese concretion, through after the modification of ferric trichloride, can obtain needed drinking water defluorination adsorbent.This adsorbent cost is low, cleaning is nontoxic, the fluorine adsorption capacity big, stable performance.Its major technique content is: natural seabed iron-manganese concretion is pulverized, obtained optimum grain-diameter, use a certain amount of liquor ferri trichloridi modification again, make Fe
3+And hydroxide is adsorbed on the iron-manganese concretion, and resulting drinking water defluorination adsorbent can effectively be removed fluorine ion (F in the water
-).
The methods for making and using same of specific embodiment high-efficiency defluorinating adsorbent is as follows:
1, the preparation method of high-efficiency defluorinating adsorbent
The essential mineral component of seabed iron-manganese concretion is Mn mineral and Fe mineral, and other authigenic minerals have apatite and zeolite minerals etc., and detrital mineral mainly is quartzy and plagioclase etc.Natural seabed iron-manganese concretion is optimal adsorption particle diameter 0.5～1mm through pulverizing, sieving.A certain amount of iron-manganese concretion is put into the activation post, adds the liquor ferri trichloridi of certain concentration of certain volume, controls less flow velocity by constant flow pump, allows the liquor ferri trichloridi iron-manganese concretion activation post of slowly flowing through, and makes sufficient Fe
3+And hydroxide is adsorbed on the iron-manganese concretion.After a period of time, take out iron-manganese concretion, and use washed with de-ionized water, after the oven dry, promptly make de-fluoridation adsorbent about 40 ℃.
2, defluorination method
Static defluorination method: getting the fluorinated water of certain concentration of certain volume, is that 1:50 adds adsorbent by de-fluoridation adsorbent and fluorinated water mass ratio, stirs, and standing sedimentation after 24 hours, supernatant are processed fluorinated water.
Defluorination example 1 (static state): get 50mL fluoride ion (F
-) 3mg/L, Na
+The pending water sample of=0.00018mol/L, pH=6 adds defluorinating agent 1g, under 20 ℃ of conditions, stirs, and after 24 hours, gets supernatant and measures F
-Content is 0.15mg/L, and eliminating rate of absorption reaches 95%.
Defluorination example 2 (static state): get 50mL fluoride ion (F
-) 5mg/L, Na
+The pending water sample of=0.0003mol/L, pH=7 adds defluorinating agent 1g, under 20 ℃ of conditions, stirs, and after 24 hours, gets supernatant and measures F
-Content is 0.50mg/L, and eliminating rate of absorption reaches 90%.
Claims (4)
1, a kind of adsorbent of drinking water defluorination is characterized in that being made up of natural seabed iron-manganese concretion at least.
2, adsorbent as claimed in claim 1 is characterized in that: the natural seabed iron-manganese concretion that mainly contains Mn mineral and Fe mineral and maintenance certain particle size.
3, adsorbent as claimed in claim 2 is characterized in that: the seabed iron-manganese concretion forms after ferric trichloride modified, makes sufficient Fe
3+And hydroxide absorption thereon.
4, adsorbent as claimed in claim 2 is characterized in that: the granularity of the seabed iron-manganese concretion that adopts is 0.5～1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101769196A CN101428208B (en) | 2007-11-07 | 2007-11-07 | Methods for producing and using high-efficiency defluorination adsorption agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101769196A CN101428208B (en) | 2007-11-07 | 2007-11-07 | Methods for producing and using high-efficiency defluorination adsorption agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101428208A true CN101428208A (en) | 2009-05-13 |
| CN101428208B CN101428208B (en) | 2011-08-17 |
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ID=40643971
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101769196A Expired - Fee Related CN101428208B (en) | 2007-11-07 | 2007-11-07 | Methods for producing and using high-efficiency defluorination adsorption agent |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811020A (en) * | 2010-03-22 | 2010-08-25 | 南昌航空大学 | Method for preparing Fe3O4@ZrO(OH)2 magnetic nano-adsorbing material for high-efficient fluoride removal from drinking water |
| CN101966445A (en) * | 2010-08-30 | 2011-02-09 | 南昌航空大学 | Magnetism-based nanocomposite for simultaneously removing arsenic and fluorine and application method thereof |
| CN101559988B (en) * | 2009-05-27 | 2013-08-07 | 北京矿冶研究总院 | Treatment method of ammonia nitrogen wastewater |
| CN105195108A (en) * | 2015-09-28 | 2015-12-30 | 江苏振宇环保科技有限公司 | Method for preparing modified natural fluoride adsorbent |
| CN113842871A (en) * | 2021-10-19 | 2021-12-28 | 山东建筑大学 | Anti-interference defluorination adsorbent and preparation method thereof |
-
2007
- 2007-11-07 CN CN2007101769196A patent/CN101428208B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101559988B (en) * | 2009-05-27 | 2013-08-07 | 北京矿冶研究总院 | Treatment method of ammonia nitrogen wastewater |
| CN101811020A (en) * | 2010-03-22 | 2010-08-25 | 南昌航空大学 | Method for preparing Fe3O4@ZrO(OH)2 magnetic nano-adsorbing material for high-efficient fluoride removal from drinking water |
| CN101966445A (en) * | 2010-08-30 | 2011-02-09 | 南昌航空大学 | Magnetism-based nanocomposite for simultaneously removing arsenic and fluorine and application method thereof |
| CN105195108A (en) * | 2015-09-28 | 2015-12-30 | 江苏振宇环保科技有限公司 | Method for preparing modified natural fluoride adsorbent |
| CN113842871A (en) * | 2021-10-19 | 2021-12-28 | 山东建筑大学 | Anti-interference defluorination adsorbent and preparation method thereof |
| CN113842871B (en) * | 2021-10-19 | 2022-05-31 | 山东建筑大学 | Preparation method of anti-interference defluorination adsorbent |
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| Publication number | Publication date |
|---|---|
| CN101428208B (en) | 2011-08-17 |
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Granted publication date: 20110817 Termination date: 20131107 |