CN1033781A - Activated-carbon defluorinating agent and manufacture method thereof - Google Patents
Activated-carbon defluorinating agent and manufacture method thereof Download PDFInfo
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- CN1033781A CN1033781A CN 87106858 CN87106858A CN1033781A CN 1033781 A CN1033781 A CN 1033781A CN 87106858 CN87106858 CN 87106858 CN 87106858 A CN87106858 A CN 87106858A CN 1033781 A CN1033781 A CN 1033781A
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- activated
- carbon
- defluorinating agent
- animal skeleton
- acetic acid
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Abstract
The present invention introduces a kind of activated-carbon defluorinating agent and method for making thereof.
By the gac that animal skeleton makes, fluoro droping effect is good, and the present invention is come unstuck crushing and screening 14-30 purpose skeletal grain with pressurization de-oiling after the animal skeleton decontamination earlier, the liming caustic dip, with the acetic acid neutralization, dry back charing, soak activation with alkali, then with acetic acid neutralization, final drying.
The inventive method is simple, and raw material sources are wide, and the product fluoro droping effect is good, and regeneration is easy, and wastage rate are low, and water quality meets standard for drinking.
Description
The present invention introduces a kind of activated-carbon defluorinating agent and method for making thereof.
Fluorine is the necessary element of human body and livestock, still, if the human intaking amount is too many, will cause organism to be poisoned, and the result of poisoning destroys the enamel of tooth, and bone becomes fragile.The chronic poisoning of fluorine also can cause the people appetite stimulator, tiredly be equipped with, tooth and textured bone, joint stiffness, fluorosis also can cause the infringement of internal organs such as kidney, heart, suprarenal gland, testis and Tiroidina.
The method of current removal of fluorine from water is more, have: " activated alumina method ", " bone meal method ", " bone black method " reach " synthetic sclerotin method " etc., also have " electrolytic aluminum method for removing fluor ", " the alchlor precipitator method ", " fluorite rock method for removing fluor ", " BC defluorinating agent method " etc. in China, all obtained certain defluorination effect.But the water that aforesaid method is handled, what have has a peculiar smell, the muddiness that has, what have contains harmful aluminium element, and also difficulty relatively of defluorinating agent regeneration.
The objective of the invention is to disclose a kind of activated-carbon defluorinating agent and preparation method thereof, make fluorine reducing agent have water purification, fall the double effects of fluorine, and regenerate easily.
Calcium phosphate powder has the elimination effect of two kinds of forms to the fluorion in the water, and a kind of form is adsorbed fluorion as carrier, and its possible reaction mechanism is:
Fall the water of fluorine through above-mentioned absorption reaction, add (PH＞9) after the alkali F
-Be increased to original concentration again, the F that this explanation is adsorbed
-Change unbound state again into, possible reaction mechanism is:
To falling the measured in solution Ca behind the fluorine
+, find Ca
+Slightly reduce, add solution behind the alkali as neutralizing, then find Ca to PH=7 with acid
+Increase is arranged again slightly, and its reaction mechanism is:
Second kind of form that fluorine falls in calcium phosphate powder is replacement process, and its possible reaction mechanism is:
According to equilibrium principle, work as OH
-When concentration is big:
From above-mentioned two kinds of defluorination reaction mechanisms, the calcium phosphate powder defluorination has specificity.In influencing former water a little the calcium ion concn, only have the defluorination effect basically.
Calcium phosphate powder is the major ingredient in the sclerotin, and the present invention is raw material with the animal skeleton, through processing treatment, makes activated-carbon defluorinating agent.Present method is divided four steps: one, raw materials pretreatment; Two, liming; Three, charing; Four, activation.
One, raw materials pretreatment.Raw material is based on animal skeleton, and animal skeleton has many kinds, and its sclerotin is formed different, and generally comparatively desirable with Patella, vertebra, phalanx, shin bone, hipbone, the sclerotin of other parts is softer, and it is more loose after coming unstuck to deoil, inconvenience processing.Green bone is put into 28% hydrochloric acid or 1% sulphuric acid soln, washing by soaking 10-36 hour, to put into pressurized vessel then, adding water heats up, insulation is 1-2 hour under the 2.5kg vapour pressure, decompression cooling back factice separates, and reaches the disposable purpose of removing factice, and fuel-displaced rate of gum output is about 10% (but not surpassing 14%) of former bone weight.
Two, liming.Carrying out drying through the aggregate that comes unstuck, pulverize after the drying, leave and take 14-30 purpose particle, 14-30 purpose particle is put into aqua calcis, liming 24-72 hour, calcium hydroxide was the best with 20% concentration, and the skeletal grain of process liming soaked 4-5 hour in 2% sodium hydroxide solution, neutralize with acetic acid again, the pH value of solution is 10 hours constant getting final product of 5 or 6 maintenances, does not reach requirement as pH value, continue to add acid, to reach to the PH of solution requirement constant till, with the skeletal grain drying.
Three, charing.Skeletal grain and wood powder (saw foam) mixing are put into container, cover one deck wood powder heating charing above again, carbonization temperature 400-600 ℃, insulation for some time, the water flushing of getting off to be cooled separates skeletal grain and wood powder.Carbonization temperature is too high to hang down the absorption that all is unfavorable for fluorine with crossing.
Four, activation.The effective ingredient of activated-carbon defluorinating agent mainly is the hydroxyl in the calcium phosphate powder, and effective means is to boil with alkali, to strengthen hydroxyl.Sodium hydroxide solution with 5% boiled 15 fens, used clean (low fluorine water) to wash after cooling, made pH value to 9, was neutralized to PH=7 with 2% acetum again, washed to not having acetate for extremely with clean water.
The composition of the fluorine reducing agent that makes is as follows: the Cao40-70%(weight percent, down together), P
2O
530-50%, Fe0.03-0.1%, Zn0.05-0.1%, acid non-soluble substance 1.5-8%.Physical parameter is: true density 3.45g/mL, volume density 1.47g/mL, bulk density 0.70g/mL, pore volume 0.39mL/g, porosity 57%, specific surface 62.06m
2/ g, average pore radius 125.7
Embodiment one:
After (mg/L) adsorbs before the absorption (mg/L)
Ca????3????3
Mg????3????300
Fe????0.04????0.02
AL????0.02????0.01
Zn????0.01????0.05
Hg????0.02????0.01
Se????0.02????0.012
F????5????0.37
Embodiment two:
After (mg/L) adsorbs before the absorption (mg/L)
Ammonia nitrogen 0.05 does not detect
Nitrite nitrogen does not detect
Nitrate nitrogen 0.07 0.09
Fluorochemical 2.52 0.10
Total hardness 30.0 21.9
Vitriol 140.0 143.0
Iodide 210.0 190.0
Arsenic does not detect
Selenium does not detect
Mercury does not detect
Prussiate 0.02 0.02
Manganese does not detect
Iron 0.50 0.20
Lead does not detect
Cadmium does not detect
Zinc does not detect
Activated-carbon defluorinating agent made it to recover to fall the fluorine ability after losing efficacy again, and its principle is:
Soak the activated-carbon defluorinating agent that lost efficacy with the sodium hydroxide solution of 1-2%, alkali lye amount fluorine reducing agent per jin soaks more than 8 hours with 2 liters in alkali, washes to PH=7 with clean water to get final product.
The inventive method is simple, and raw material sources are wide, and the product fluoro droping effect is good, and regeneration is easy, and wastage rate are low, and water quality meets standard for drinking.
Claims (2)
1, a kind of activated-carbon defluorinating agent made from animal skeleton is characterized by CaO40-70% (weight percent, down together), P
2O
530-50%, Fe0.03-0.1%, Zn0.05-0.1%, acid non-soluble substance 1.5-8%.
2, a kind of animal skeleton is the method that raw material is made activated-carbon defluorinating agent, and charing is that skeletal grain and wood powder (saw foam) mixing are put into container, covers with one deck wood powder more above, and the heating charing is characterized in that carbonization temperature is 400-600 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87106858 CN1033781A (en) | 1987-10-08 | 1987-10-08 | Activated-carbon defluorinating agent and manufacture method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87106858 CN1033781A (en) | 1987-10-08 | 1987-10-08 | Activated-carbon defluorinating agent and manufacture method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1033781A true CN1033781A (en) | 1989-07-12 |
Family
ID=4815876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87106858 Pending CN1033781A (en) | 1987-10-08 | 1987-10-08 | Activated-carbon defluorinating agent and manufacture method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1033781A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085050C (en) * | 1999-12-01 | 2002-05-22 | 湖南医科大学 | Low-fluorine brick tea and its production process |
| CN101993068A (en) * | 2010-10-27 | 2011-03-30 | 北京化工大学 | Preparation method of porous structured active carbon |
| CN103145209A (en) * | 2013-03-05 | 2013-06-12 | 中国科学院新疆生态与地理研究所 | Method for treating cobalt-containing wastewater by using sodium hydroxide modified pig bones |
| CN103787301A (en) * | 2014-01-13 | 2014-05-14 | 曹云富 | Method for processing bone char by taking bovine bones as active ingredient |
| CN108516546A (en) * | 2018-05-09 | 2018-09-11 | 中国铝业股份有限公司 | A kind of preparation method of activated carbon |
| CN108793160A (en) * | 2018-08-17 | 2018-11-13 | 广东璞睿泰科环保科技有限公司 | Preparation method with the active Carbon Materials of fluorine removal |
-
1987
- 1987-10-08 CN CN 87106858 patent/CN1033781A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085050C (en) * | 1999-12-01 | 2002-05-22 | 湖南医科大学 | Low-fluorine brick tea and its production process |
| CN101993068A (en) * | 2010-10-27 | 2011-03-30 | 北京化工大学 | Preparation method of porous structured active carbon |
| CN101993068B (en) * | 2010-10-27 | 2012-05-30 | 北京化工大学 | Preparation method of porous structured active carbon |
| CN103145209A (en) * | 2013-03-05 | 2013-06-12 | 中国科学院新疆生态与地理研究所 | Method for treating cobalt-containing wastewater by using sodium hydroxide modified pig bones |
| CN103787301A (en) * | 2014-01-13 | 2014-05-14 | 曹云富 | Method for processing bone char by taking bovine bones as active ingredient |
| CN108516546A (en) * | 2018-05-09 | 2018-09-11 | 中国铝业股份有限公司 | A kind of preparation method of activated carbon |
| CN108793160A (en) * | 2018-08-17 | 2018-11-13 | 广东璞睿泰科环保科技有限公司 | Preparation method with the active Carbon Materials of fluorine removal |
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