CN104667859A - Calcium bicarbonate modified diatomite adsorbent - Google Patents
Calcium bicarbonate modified diatomite adsorbent Download PDFInfo
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- CN104667859A CN104667859A CN201310651290.1A CN201310651290A CN104667859A CN 104667859 A CN104667859 A CN 104667859A CN 201310651290 A CN201310651290 A CN 201310651290A CN 104667859 A CN104667859 A CN 104667859A
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- diatomite
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- calcium bicarbonate
- bicarbonate
- chloride solution
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Abstract
The invention provides a calcium bicarbonate modified diatomite adsorbent. The calcium bicarbonate modified diatomite adsorbent consists of diatomite, sodium bicarbonate, a saturated calcium chloride solution, activated clay, and polyacrylamide. A preparation method of the calcium bicarbonate modified diatomite adsorbent comprises the following steps: adding metered diatomite to a prepared sodium bicarbonate solution, slowly adding the saturated calcium chloride solution, the activated clay and the like while stirring, filtering after the completion of reaction, arranging in an oven and drying under the condition of 105 DEG C to obtain the calcium bicarbonate modified diatomite.
Description
Technical field
The invention belongs to technical field of composite materials, be specifically related to a kind of calcium bicarbonate modification infusorial earth adsorbent for the treatment of heavy metal ion-containing waste water.
Background technology
Adsorbent is a kind of product required for field such as drink manufacturing, wastewater treatment, Oil Production and chemical analysis, can poisonous and harmful substance in adsorptive liquid when its Main Function is just to use, and makes it purified product.In chemical analysis field, the effect of adsorbent then will be placed in fixing for some tested element in liquid among analytical instrument on the sorbent, carries out qualitative analysis and quantitatively detect.This wherein, it is important that adsorbent just seems very as its performance of carrier of tested element, and wherein most important performance comprises the adsorbance of adsorbent, the clean level, apparent mass etc. of adsorbent self.
Lead applies more a kind of toxic heavy metal in industry, a large amount of lead waste water is produced in the industry such as plating, metallurgy, chemical industry, if not treated and be directly discharged in natural environment, plumbous can enrichment finally enter human body through food chain in water body or corresponding organism, cause very large toxic action.The technological means eliminating industrial discharge Pb In Exhausted Water ion is more, comprises ion-exchange, chemical precipitation, embrane method, electrolysis and absorption etc.Wherein absorption method is one of most effectual way of heavy-metal pollution in process stain disease, the feature of the method is simple to operate, heavy metal recoverable, generally can not produces secondary pollution, is generally suitable for the stain disease system that treating capacity is large, concentration of heavy metal ion is lower.In Handling Waste Water by Absorbing Way, the principle of land pollutant is using the inorganic material of high-specific surface area as adsorbent, by the mechanism such as physical absorption, chemisorbed or ion-exchange by the ionic adsorption of the various forms of lead at adsorbent surface, thus land pollutant enrichment is removed, the key of this technology be to use specific area high, with the strong material of lead ion active force as adsorbent.
Diatomite is that after the remains accumulative deposit of unicellular rudimentary plant diatom in ancient times, the one formed through preliminary diagenesis has porous biological silicalite.It is made up of the wall shell of diatom, wall shell there is micropore that is multistage, a large amount of, ordered arrangement, and the characteristic such as diatomite has that density is little, specific area large, excellent adsorption, acidproof, alkaline-resisting, insulation, surface texture and the excellent absorption property of its uniqueness are suitable for being used as sorbing material, and Chinese diatomite Resource management enriches, cheap and easy to get.
Atlapulgite uses clay (mainly bentonite) to be raw material, and through inorganic acidifying process, then through the adsorbent that water rinse, drying are made, outward appearance is off-white powder, and odorless is tasteless, nontoxic, and absorption property is very strong, can be adsorbed with color substance, organic substance.The easy moisture absorption, placed and can reduce absorption property for a long time in atmosphere.But, be heated to more than 300 degrees Celsius and just start to lose the crystallization water, be that structure changes, affect fading effect.Atlapulgite is water insoluble, in organic solvent and various oils, be almost dissolved in completely in hot caustic soda and hydrochloric acid, relative density 2.3 ~ 2.5, in water and oil, swelling is minimum.Be widely used in the decolorizing and refining of mineral oil, animal and plant fat, wax processed and organic liquid.Also can be used as moisture drying agent, endo-medicine alkaline hydrolysis toxic agent, vitamin A, B adsorbent, lubricating oil coincidence contact agent, gasoline gas phase finishing agent etc., also can be used as middle temperature polymerization catalyst, high temperature polymerization agent and manufacture the raw material of granular carclazyte.
Summary of the invention
The object of the invention is to take diatomite as raw material, by certain processing process, the skeleton of natural diatomaceous earth is retained, and removing wherein various organic matter and soluble impurity, make it composition single, and reach higher water absorption rate.
For prior art Problems existing, the invention provides a kind of calcium bicarbonate modification infusorial earth adsorbent and preparation method, its preparation method is: joined by the diatomite of metering in the sodium bicarbonate solution prepared, slow steamed bun adds saturated calcium chloride solution and atlapulgite etc. while stirring, reaction terminates rear filtration, be placed in baking oven dry under 105 DEG C of conditions, calcium bicarbonate modification stone algae soil can be obtained.
Present invention obtains positive effect, be mainly manifested in:
(1) the diatomite material stable performance relying on the present invention to produce, absorption property is strong, has large porosity and specific area, and the existence of a large amount of micropore, is the very good material of water treatment absorbent in addition.
(2) pollutant component in sewage is complicated, and diatomite, except can removing heavy metal ion wherein, can also effectively reclaim by heavy metal ion.
(3) diatomite can also remove microorganism in sewage, algae, inorganic matter and organic matter etc., has a wide range of applications so utilize diatomite to dispose of sewage.
(4) adsorbent produced almost can absorb 6 times to the water of own wt, and due to through calcination processing, diatomite skeleton has suitable intensity, even if absorb a lot of moisture still can not be hydrolyzed into powder, enough adsorption effects can be ensured, again secondary pollution welding can not occur.
Specific embodiment
Embodiment 1:
Diatomite 124
Sodium acid carbonate 42
Saturated calcium chloride solution 33
Atlapulgite 20
Polyacrylamide 3
Preparation scheme: the diatomite of metering is joined in the sodium bicarbonate solution prepared, slow steamed bun adds saturated calcium chloride solution and atlapulgite etc. while stirring, reaction terminates rear filtration, is placed in baking oven dry under 105 DEG C of conditions, can obtains calcium bicarbonate modification stone algae soil.
The diatomite material stable performance that the present invention produces, absorption property is strong, has large porosity and specific area, and the existence of a large amount of micropore, is the very good material of water treatment absorbent in addition.
Embodiment 2:
Diatomite 136
Sodium acid carbonate 45
Saturated calcium chloride solution 36
Atlapulgite 24
Polyacrylamide 5
Preparation scheme is the same.
Pollutant component in sewage is complicated, and diatomite, except can removing heavy metal ion wherein, can also effectively reclaim by heavy metal ion.
Embodiment 3:
Diatomite 147
Sodium acid carbonate 49
Saturated calcium chloride solution 40
Atlapulgite 28
Polyacrylamide 7
Preparation scheme is the same.
Calcium bicarbonate modification infusorial earth be purify liquid waste the heavy metal ion such as middle chromium ion, zinc ion, copper ion and lead ion have self-absorbent, its adsorption capacity reaches 3.5 ~ 4mmol/g.The condition of the complete Adsorption of heavy metal ion is: copper ion, and pH value is 7 ~ 10; Chromium ion, pH value is greater than 5.5; Zinc ion, pH value is 8.5 ~ 9.5, lead ion, pH value be 5 ~ 7 or pH value be greater than 10.5.This adsorbent not only can use in a static condition, also can use in a dynamic condition, and it is contained in tower in granular form.But, only have 3.43MPa containing the diatomaceous mechanical strength of calcium carbonate, add after bentonite makes binder, its mechanical strength to 8.82 ~ 10.79MPa can be improved, so just can meet the use in wastewater treatment process.
This product is applicable to remove the various heavy metal ion in waste water.
Embodiment given is above to better the present invention is described, is not that disclosed content is only limitted to the following examples.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read described content of the present invention, these equivalent form of values fall within the application's appended claims limited range equally.
Claims (3)
1. a calcium bicarbonate modification infusorial earth adsorbent, is characterized in that, it is made up of diatomite, sodium acid carbonate, saturated calcium chloride solution, atlapulgite and polyacrylamide.
2. according to claim 1, described calcium bicarbonate modification infusorial earth adsorbent, it is characterized in that, each component by quality proportioning is: diatomite 120 ~ 150, sodium acid carbonate 40 ~ 50, saturated calcium chloride solution 30 ~ 40, atlapulgite 20 ~ 30, polyacrylamide 1 ~ 10.
3. according to claim 1, described calcium bicarbonate modification infusorial earth adsorbent, it is characterized in that, its preparation method is: joined by the diatomite of metering in the sodium bicarbonate solution prepared, slow steamed bun adds saturated calcium chloride solution and atlapulgite etc. while stirring, reaction terminates rear filtration, is placed in baking oven dry under 105 DEG C of conditions, can obtains calcium bicarbonate modification stone algae soil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310651290.1A CN104667859A (en) | 2013-12-03 | 2013-12-03 | Calcium bicarbonate modified diatomite adsorbent |
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| CN201310651290.1A CN104667859A (en) | 2013-12-03 | 2013-12-03 | Calcium bicarbonate modified diatomite adsorbent |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105384321A (en) * | 2015-12-29 | 2016-03-09 | 哈尔滨工业大学 | Bioleaching complex reagent |
| CN108854504A (en) * | 2018-07-11 | 2018-11-23 | 合肥帧讯低温科技有限公司 | Air purifying agent and preparation method thereof |
| CN109486227A (en) * | 2018-10-11 | 2019-03-19 | 朱登年 | A kind of odor adsorption agent and its application in low VOC plastic matrix |
-
2013
- 2013-12-03 CN CN201310651290.1A patent/CN104667859A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105384321A (en) * | 2015-12-29 | 2016-03-09 | 哈尔滨工业大学 | Bioleaching complex reagent |
| CN108854504A (en) * | 2018-07-11 | 2018-11-23 | 合肥帧讯低温科技有限公司 | Air purifying agent and preparation method thereof |
| CN109486227A (en) * | 2018-10-11 | 2019-03-19 | 朱登年 | A kind of odor adsorption agent and its application in low VOC plastic matrix |
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Application publication date: 20150603 |