CN105727881B - A kind of alkali modification attapulgite clay adsorbent and preparation method thereof - Google Patents
A kind of alkali modification attapulgite clay adsorbent and preparation method thereof Download PDFInfo
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- CN105727881B CN105727881B CN201610200746.6A CN201610200746A CN105727881B CN 105727881 B CN105727881 B CN 105727881B CN 201610200746 A CN201610200746 A CN 201610200746A CN 105727881 B CN105727881 B CN 105727881B
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- 229960000892 attapulgite Drugs 0.000 title claims abstract description 39
- 229910052625 palygorskite Inorganic materials 0.000 title claims abstract description 39
- 239000003513 alkali Substances 0.000 title claims abstract description 32
- 238000012986 modification Methods 0.000 title claims abstract description 29
- 230000004048 modification Effects 0.000 title claims abstract description 29
- 239000003463 adsorbent Substances 0.000 title claims abstract description 17
- 239000004927 clay Substances 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000000203 mixture Substances 0.000 claims abstract description 19
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 10
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 10
- 239000004571 lime Substances 0.000 claims abstract description 10
- 150000001875 compounds Chemical class 0.000 claims abstract description 9
- 238000001354 calcination Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 239000012153 distilled water Substances 0.000 claims description 14
- 239000013049 sediment Substances 0.000 claims description 13
- 239000000725 suspension Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 238000000746 purification Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 3
- 238000003760 magnetic stirring Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 2
- 238000009423 ventilation Methods 0.000 claims description 2
- 238000005119 centrifugation Methods 0.000 claims 1
- 239000002002 slurry Substances 0.000 claims 1
- 239000002689 soil Substances 0.000 abstract description 30
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 19
- 239000002253 acid Substances 0.000 abstract description 9
- 238000010521 absorption reaction Methods 0.000 abstract description 7
- 239000007864 aqueous solution Substances 0.000 abstract description 6
- 238000005067 remediation Methods 0.000 abstract description 5
- 238000001179 sorption measurement Methods 0.000 abstract description 5
- 239000002594 sorbent Substances 0.000 abstract description 3
- 238000002161 passivation Methods 0.000 abstract description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 8
- 150000002500 ions Chemical class 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 239000002270 dispersing agent Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- -1 polyoxy Polymers 0.000 description 3
- 229920000056 polyoxyethylene ether Polymers 0.000 description 3
- 229940051841 polyoxyethylene ether Drugs 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 2
- WLZRMCYVCSSEQC-UHFFFAOYSA-N cadmium(2+) Chemical compound [Cd+2] WLZRMCYVCSSEQC-UHFFFAOYSA-N 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 230000009514 concussion Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 235000019795 sodium metasilicate Nutrition 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 238000010561 standard procedure Methods 0.000 description 2
- DMAXMXPDVWTIRV-UHFFFAOYSA-N 2-(2-phenylethyl)phenol Chemical compound OC1=CC=CC=C1CCC1=CC=CC=C1 DMAXMXPDVWTIRV-UHFFFAOYSA-N 0.000 description 1
- DUIOKRXOKLLURE-UHFFFAOYSA-N 2-octylphenol Chemical compound CCCCCCCCC1=CC=CC=C1O DUIOKRXOKLLURE-UHFFFAOYSA-N 0.000 description 1
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 239000011852 carbon nanoparticle Substances 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000002178 crystalline material Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000001976 improved effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- RVPVRDXYQKGNMQ-UHFFFAOYSA-N lead(2+) Chemical compound [Pb+2] RVPVRDXYQKGNMQ-UHFFFAOYSA-N 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical group CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical group [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/12—Naturally occurring clays or bleaching earth
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4806—Sorbents characterised by the starting material used for their preparation the starting material being of inorganic character
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Analytical Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of alkali modification attapulgite clay adsorbent and preparation method thereof, which is by using alkali compounds, lime and attapulgite mix, and alkali modification attapulgite clay adsorbent material is obtained after calcining.The alkali modification attapulgite clay adsorbent includes following material by weight：Purify 12 parts of attapulgite；0.5 1 parts of alkali compounds；12 parts of lime.The heavy metal ion and its compound that the sorbent material can be used in Adsorption aqueous solution, the material can be also used for the soil remediation on farmland simultaneously, for improveing the heavy metal ion in acid soil and absorption passivation polluted soil, the part physicochemical property of agricultural land soil is adjusted.
Description
Technical field
The invention belongs to technical field of sewage, more particularly to a kind of modification attapulgite clay adsorbent material in a huge sum of money
Belong to waste water and the application in polluted soil improvement, the invention further relates to the preparation methods of the adsorbent.
Background technology
Water is for the survival of mankind and development important substance basis, but with human progress and industrial expansion,
Heavy metal pollution problem becomes getting worse.Heavy metal pollution refers to the environmental pollution as caused by heavy metal and its compound,
The Absolute emissions amount of heavy metal accounts for about the 66.33% of waste water total amount in middle discharge of wastewater.Its main source is mining engineering, discards
Discharge, sewage irrigation, the percolate using heavy metals exceeding standard product and garbage loading embeading.These enter natural water and soil
Heavy metal, it is difficult to eliminate naturally.Heavy metal pollution mainly generates two big harm in nature：First, in nature, that is, food chain
It builds up, eventually results in organism lesion or death.Second is that influence agricultural production, it was reported that China is annual because attaching most importance to
Metallic pollution and cause more than 1,000 ten thousand tons of grain drop in production, in addition also up to 12,000,000 tons every year of contaminated by heavy metals grain, is closed
Meter economic loss is at least up to 20,000,000,000 yuan.
Heavy metal ion conventional method in removal water body mainly has two big kinds：First, based technique for in-situ remediation；Second is that dystopy
Recovery technique.Contaminated soil is mainly digged up and focused on by showering technology, is mainly had ablution, is burned
Processing, heat treating process etc., but excavation and transport of the showering technology due to being related to earth volume, there is time-consuming, costs
The problems such as height, inefficiency, and depth contaminated soil cannot be handled and there is the soil below economic value and building.It is former
Position recovery technique be at the scene under the conditions of the method directly repaired to contaminated soil.Based technique for in-situ remediation is as a kind of technique
Simply, soil remediation new technology easy to operate, is gradually approved by people, receives extensive attention.
Attapulgite as a kind of mineral resources of rich reserves in China, in water process be a kind of development cost it is cheap,
Effective environmental-protection adsorption new material.Its unique porous type chain layered crystal structure, leads to large number of duct and seam
For gap through in entire crystalline material, natural huge specific surface area determines that it has good adsorptivity, natural concave convex rod
One layer of tradable cation and hydroxyl are contained in native surface, can with aqueous solution or in the form of an ion existing heavy metal occur from
Sub- exchange interaction forms coordinate bond, so as to be passivated or Adsorption aqueous solution in heavy metal.However natural concave convex rod is former
Shape soil contains a large amount of impurity, and duct permeability is poor, influences its absorption property, and need to pass through purification and appropriate modification could obtain
Better absorption property.
Invention content
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of systems of alkali modification concave convex rod sorbent material
Preparation Method and its application.
The purpose of the present invention is realized by the following method：
A kind of alkali modification attapulgite material is by using after alkali compounds, lime and purification attapulgite mix, passes through
It crosses calcining and obtains alkali modification attapulgite clay adsorbent material.
A kind of alkali modification attapulgite clay adsorbent includes following material by weight：
Purify 1-2 parts of attapulgite
0.5-1 parts of alkali compounds
1-2 parts of lime
A kind of preparation method of alkali modification attapulgite clay adsorbent, includes the following steps：
(1) it purifies：Natural attapulgite using mechanical means is rolled, crushes, grind, is sieved with 100 mesh sieve, by adding
Enter distilled water, mud in suspension be made, then carry out ultrasonic disperse 10min, discard lower sediment, in reservation suspension carry out from
The heart controls rotating speed 4000r/min, centrifuges 15min.Retain sediment, it is for use to be transferred to beaker；
(2) modifying agent：By highly basic powder and lime with mass ratio 1:1 or 0.5:1 ratio mixes, and obtains alkaline mixt,
That is modifying agent；
(3) it is modified：The modifying agent that the purification attapulgite that step (1) is prepared is prepared with step (2) is with 2:1
Ratio mixing after obtain mixture, after while the mixture is stirred continuously add in distilled water carry out mix, be made outstanding
Mud scum is starched, and is constantly stirred on magnetic stirring apparatus, to be added to finish, and continues stirring to obtain mixing mud to uniformly mixed；
(4) pH is adjusted：In the case where being stirred continuously, hydrochloric acid is constantly instilled in mixing mud made from step (3), while with essence
The pH of close pH test paper method control mud is 8 or so, continues to stir 15min or so or until being uniformly mixed；
(5) it centrifuges：Mud made from step (4) is centrifuged on centrifuge, control rotating speed is in 4000r/min；From
In heart 15min, then solid sediment is washed with distilled water 3 times, continues to centrifuge, dry, then ground 100 mesh
Sieve；
(6) it calcines：The solid dried object that (5) obtain is calcined, at 350 DEG C~450 DEG C, calcining 1h, natural cooling,
Alkali modification attapulgite sorbing material can be obtained, divulge information or carries out sealing preservation after drying in drying box.
Preferably, above-mentioned steps (1) are replaced with：(1) it purifies：Natural attapulgite is ground using mechanical means
Pressure, broken, grinding, sieve with 100 mesh sieve, and by adding in distilled water, mud in suspension are made, then carries out dispersant dispersion 10min, abandons
Sub-cloud precipitates, and suspension is centrifuged in reservation, controls rotating speed 4000r/min, centrifuges 15min.Retain sediment, be transferred to
Beaker is for use.
Preferably, the dispersant is calgon or Sodium Polyacrylate or sodium metasilicate.
More preferably, the dispersant is nonylphenol polyoxyethylene ether, octyl phenol polyoxyethylene ether, phenethyl phenol polyoxy second
It is one or more in alkene ether, fatty alcohol polyoxyethylene ether, polyoxyethylene alkylphenol ether.
More preferably, the dispersant be composite dispersing agent, ingredient by it is following by weight：Nonyl pheno
Ether, sodium metasilicate, sodium carboxymethylcellulose, active carbon nanoparticles, polyoxyethylene alkylphenol ether mixture, volume mixture ratio
For：1:(2-3):1:1:0.5.
Advantageous effect
The heavy metal ion and its compound that the sorbent material can be used in Adsorption aqueous solution, while the material is also
It can be used for the soil remediation on farmland, for improveing the heavy metal ion in acid soil and absorption passivation polluted soil,
Adjust the part physicochemical property of agricultural land soil.
Specific embodiment
The present invention is described in further detail with reference to embodiment, for going for the heavy metal ion in aqueous solution
It removes, inventive formulation and production method are as follows, can reach effect as scheduled：
Embodiment 1：
(1) it purifies：Natural attapulgite using mechanical means is rolled, crushes, grind, is sieved with 100 mesh sieve, by adding
Enter distilled water, mud in suspension be made, then carry out ultrasonic disperse 10min, discard lower sediment, in reservation suspension carry out from
The heart controls rotating speed 4000r/min, centrifuges 15min.Retain sediment, it is for use to be transferred to beaker；
(2) by calcium hydroxide and lime in mass ratio 0.5:1 ratio mixes, and obtains alkali modification mixture, i.e. modifying agent B.
(3) it is modified：The modifying agent that the purification attapulgite that step (1) is prepared is prepared with step (2) is with 2:1
Ratio mixing after obtain mixture, after while the mixture is stirred continuously add in distilled water carry out mix, be made outstanding
Mud scum is starched, and is constantly stirred on magnetic stirring apparatus, to be added to finish, and continues stirring to obtain mixing mud to uniformly mixed；
(4) pH is adjusted：In the case where being stirred continuously, hydrochloric acid is constantly instilled in mixing mud made from step (3), while with essence
The pH of close pH test paper method control mud is 8 or so, continues to stir 15min or so or until being uniformly mixed；
(5) it centrifuges：Mud made from step (4) is centrifuged on centrifuge, control rotating speed is in 4000r/min；From
In heart 15min, then solid sediment is washed with distilled water 3 times, continues to centrifuge, dry, then ground 100 mesh
Sieve；
(6) it calcines：The solid dried object that (5) obtain is calcined, at 350 DEG C~450 DEG C, calcining 1h, natural cooling,
Aeration-drying carries out sealing preservation in drying box after drying, you can obtains alkali modification attapulgite sorbing material.
Preferably, above-mentioned steps (1) are replaced with：(1) it purifies：Natural attapulgite is ground using mechanical means
Pressure, broken, grinding, sieve with 100 mesh sieve, and by adding in distilled water, mud in suspension are made, then carries out dispersant dispersion 10min, abandons
Sub-cloud precipitates, and suspension is centrifuged in reservation, controls rotating speed 4000r/min, centrifuges 15min.Retain sediment, be transferred to
Beaker is for use.
To obtain the alkali modification attapulgite to the Adsorption effect of the heavy metal ion in aqueous solution and to soil
Improved effect, spy have done the scheme of being implemented as follows：
(1) cadmium-ion solution of 1g/L and the solution of lead ion solution is respectively configured, is then mixed and made into the mixed of 500mg/L
Close solution.The mixed liquor 100ml of six parts of lead ions and cadmium ion is accurately measured respectively, is put into 250ml volumetric flasks
(2) weigh 6 parts of alkali modification attapulgite clay adsorbent material respectively, quality be respectively 0.025g, 0.05g, 0.1g,
0.15g, 0.2g, 0.25g are put into conical flask, and room temperature concussion absorption is for 24 hours.
(3) after concussion absorption, 2h is stood, supernatant 20ml is taken, 15min is centrifuged under 4000r/min, using national standard
Method measures concentration of heavy metal ion.
1 alkali modification concave convex rod sorbing material of embodiment absorption heavy metal effect situation is shown in Table 1
Table 1
Embodiment 2
To obtain alkali modification attapulgite clay adsorbent material in improvement acid soil, recovery field biological characteristic performance is special
The domestic experiment acid soil in Xuyi County of Jiangsu Province is picked up from selection, and the pH value of initial soil is non-Suitable agricultural kind between 4-5
The acid soil of plant.
This is used to improveing acid soil alkali modification attapulgite sorbing material manufacturing process as follows：
(1) by broken concave convex rod undisturbed soil in mass ratio 1:10 add in distilled water, are mixed into mud and are being stirred continuously
Lower progress ultrasonic disperse 10-15min, discards sediment, and suspension is centrifuged in reservation, control rotating speed in 4000r/min, from
Heart 15min obtains mud A.
(2) modifying agent：By calcium hydroxide and lime with mass ratio 1:1 is mixed, and obtains alkaline mixt, i.e. modifying agent
B；
(3) it is modified：The modifying agent that the purification attapulgite that step (1) is prepared is prepared with step (2) is with 2:1
Ratio mixing after obtain mixture, after while the mixture is stirred continuously add in distilled water carry out mix, control turn
Speed in 60-120r/min per minute, mud in suspension is made, it is to be added to finish, continue stirring to obtain mixing mud to being uniformly mixed；
(4) pH is adjusted：In the case where being stirred continuously, hydrochloric acid is constantly instilled in mixing mud made from step (3), while with essence
The pH of close pH test paper control mud is 8 or so, continues to stir 15min or so or until being uniformly mixed；
(5) it centrifuges：Mud made from step (4) is centrifuged on centrifuge, control rotating speed is in 4000r/min；From
In heart 15min, then solid sediment is washed with distilled water 3 times, continues to centrifuge, then at 105 DEG C dry 4h or
It is that gravity-flow ventilation is dried, then grinds, sieve with 100 mesh sieve.
(6) it calcines：The solid dried object that (5) obtain is calcined, at 400 DEG C, calcines 1h, natural cooling, you can obtain
Alkali modification attapulgite sorbing material is obtained, divulge information or carries out sealing preservation after drying in drying box.
To obtain alkali modification attapulgite clay adsorbent to the implementation result on acid soil improvement, spy has done the side of being implemented as follows
Case：
(1) moisture content for measuring acid soil is 18.2%, accurately weighs 5 parts of experiment soil, and every part of soil sample presses practical 10g
Dry soil samples, which calculates, to be weighed, and is put into 50ml small beakers, then number 1-0,1-1,1-2,1-3,1-4,1-5.
(2) it is concave-convex for the fully dried alkali modification of 0.0g, 0.3g, 0.9g, 1.5g, 1.8g, 2.1g that quality is weighed respectively
Stick earth adsorbing sample is put by number in experiment soil, every part of style respectively stirring twice, i.e., with glass bar clockwise and the inverse time
Respectively stirring is primary for needle, turns over shape.
PH is measured by National Standard Method after sample opening is continuously cultivated 3 days, it is as a result as follows：
Alkali modification attapulgite clay adsorbent material improvement acid soil effect situation is shown in Table 2 in embodiment 2：
Table 2
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that：It still may be used
To modify to the technical solution recorded in previous embodiment or carry out equivalent replacement to which part technical characteristic；And
These modifications are replaced, the spirit and model of technical solution of the embodiment of the present invention that it does not separate the essence of the corresponding technical solution
It encloses.
Claims (1)
1. a kind of alkali modification attapulgite clay adsorbent is by using attapulgite, alkali compounds and lime mix, after calcining
It obtains, it is characterised in that：The alkali modification attapulgite clay adsorbent includes following material by weight,
Purify 1-2 parts of attapulgite
0.5-1 parts of alkali compounds
1-2 parts of lime；
A kind of preparation method of alkali modification attapulgite clay adsorbent, includes the following steps：
(1) it purifies：Natural attapulgite using mechanical means is rolled, crushes, grind, is sieved with 100 mesh sieve, is steamed by adding in
Mud in suspension is made in distilled water, then carries out ultrasonic disperse 10min, discards lower sediment, and suspension is centrifuged in reservation, control
Rotating speed 4000r/min processed centrifuges 15min；Retain sediment, it is for use to be transferred to beaker；
(2) modifying agent：By highly basic powder and lime with mass ratio 1:1 or 0.5:1 ratio mixes, and obtains alkaline mixt, that is, changes
Property agent；
(3) it is modified：The modifying agent that the purification attapulgite that step (1) is prepared is prepared with step (2) is with 2:1 ratio
Example mixing after obtain mixture, after while the mixture is stirred continuously add in distilled water carry out mix, suspension mud is made
Slurry, is constantly stirred on magnetic stirring apparatus, to be added to finish, and continues stirring to obtain mixing mud to uniformly mixed；
(4) pH is adjusted：In the case where being stirred continuously, hydrochloric acid is constantly instilled, while use Accurate pH in mixing mud made from step (3)
The pH of test paper method control mud is 8, continues to stir 15min or until being uniformly mixed；
(5) it centrifuges：Mud made from step (4) is centrifuged on centrifuge, control rotating speed is in 4000r/min；Centrifugation
In 15min, then solid sediment is washed with distilled water 3 times, continues to centrifuge, dry, then grinding sieves with 100 mesh sieve；
(6) it calcines：The solid dried object that (5) obtain is calcined, at 350 DEG C~450 DEG C, calcines 1h, natural cooling, ventilation
Drying carries out sealing preservation in drying box after drying, you can obtains alkali modification attapulgite sorbing material.
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| CN113307280B (en) * | 2021-06-23 | 2023-01-06 | 西北师范大学 | Method for normalizing quality of attapulgite product |
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