CN107308906A - A kind of clay mineral sorbing material of restoration of soil polluted by heavy metal and preparation method thereof - Google Patents
A kind of clay mineral sorbing material of restoration of soil polluted by heavy metal and preparation method thereof Download PDFInfo
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- CN107308906A CN107308906A CN201710717976.4A CN201710717976A CN107308906A CN 107308906 A CN107308906 A CN 107308906A CN 201710717976 A CN201710717976 A CN 201710717976A CN 107308906 A CN107308906 A CN 107308906A
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- 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
- B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
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- 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
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/041—Oxides or hydroxides
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- 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
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
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- 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
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
- B01J20/08—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04 comprising aluminium oxide or hydroxide; comprising bauxite
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
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- Environmental & Geological Engineering (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses the clay mineral sorbing material and its preparation technology of a kind of restoration of soil polluted by heavy metal, the clay mineral sorbing material includes palygorskite；Palygorskite then mainly includes 56.96% SiO2, 23.83% Mg, Al, Fe and O, 19.21% crystallization water.And by method S1, palygorskite raw material stoving, crushing, sieving, S2, addition hydrochloric acid solution are mixed, S3, standing, filtering, drying, S4, high-temperature roasting, natural cooling obtain clay mineral sorbing material.This clay mineral sorbing material, high adsorption capacity, with good passivation repair ability, it is possible to decrease heavy metal in soil bio-available Zn concentration, processing time is short, remediation efficiency is high, and rehabilitation cost is low, and will not cause any pollution to environment and soil, is worthy to be popularized.
Description
Technical field
The present invention relates to remediation of heavy metal-contaminated soil field, more particularly to a kind of restoration of soil polluted by heavy metal
Clay mineral sorbing material and preparation method thereof.
Background technology
Heavy metal pollution of soil refers to that due to mankind's activity content of the minor metallic element in soil in soil exceedes
Background value, too high levels caused by excess deposition, is referred to as heavy metal pollution of soil.Soil is nature for the survival of mankind
One of resource, is the basis of agricultural, is also that the mankind obtain food and the material base of other regenerated resources.With industrialization development
With the modernization of agricultural production, heavy metal pollution has become the subject matter of a harm global environment quality.Heavy metal member
Element is a kind of potential pollutant, it is difficult to by soil microbial degradation.At present, China's heavy metals pollution in agricultural is overall special
The degree that levying is to pollute progressively is aggravated, and the area of pollution expands year by year, and pluralistic trend is presented in pollution sources.
In the prior art, the conventional reparation means for heavy metal pollution of soil include solidification, elution, at cement kiln collaboration
Put, the technical measures such as phytoremediation.Wherein, solidify, cement kiln synergic processing technology energy consumption is big, cost is high；Elution technique will disappear
A large amount of eluents are consumed, and elute improper easy formation secondary pollution；Though phytoremediation it is environment-friendly be not present secondary pollution, cost compared with
It is low, but processing time is longer, under remediation efficiency is relatively low.There is respective defect for above-mentioned heavy metal-polluted soil recovery technique
Property, heavy metal in soil is removed as one of heavy-metal contaminated soil repairing research direction by certain sorbing material.
Therefore, the present invention proposes a kind of clay mineral sorbing material of restoration of soil polluted by heavy metal.
The content of the invention
The invention aims to solve shortcoming present in prior art, and a kind of repairing heavy metal pollution proposed
Clay mineral sorbing material of soil and preparation method thereof.
The present invention provides a kind of clay mineral sorbing material of restoration of soil polluted by heavy metal, including palygorskite；
The palygorskite includes 56.96% SiO2, 23.83% Mg, Al, Fe and O, 19.21% crystallization water.
Preferably, described Mg, Al, Fe and O mass ratio are：2.5~4：3~5：3.2~5.8：1~1.3.
A kind of preparation method of the clay mineral sorbing material of the invention that restoration of soil polluted by heavy metal is also provided, including with
Lower step：
S1, palygorskite raw material is placed under 105~135 DEG C of circulating air and dried to constant weight, by the palygorskite raw material after drying
It is placed in pulverizer, crosses 80~120 mesh sieves after fully crushing, obtain palygorskite powder A；
S2, by step S1 gained palygorskite powder A add to concentration for 4~8% hydrochloric acid solution in, with 360~480r/min
Rotating speed stirring mixing 1.5~2.5h, obtain compound B；
S3, the compound B of gained in step S2 stood into 20~30h, 76~88 DEG C of drying baker is placed in after being filtered
Interior drying obtains dried powder C to constant weight；
S4, by step S3 gained dried powder C be transferred in Muffle furnace, at 280~350 DEG C of high temperature, be calcined 3~5h,
Complete after roasting, room temperature is naturally cooled to needed for taking out and obtains clay mineral sorbing material described in the claim 1.
Preferably, the addition of hydrochloric acid solution is 2.2~3.5 times of palygorskite powder A amounts in the step S2.
Preferably, the filtering accuracy of filter is 130~175 mesh in the step S3.
Preferably, the sintering temperature in the step S4 is 320 DEG C, and roasting time is 4h.
Clay mineral sorbing material of a kind of restoration of soil polluted by heavy metal proposed by the present invention and preparation method thereof, by slope
The processing of the processes such as thread stone raw material drying, crushing, HCl treatment, filtering, drying, roasting is obtained, gained clay mineral adsorption material
Expect high adsorption capacity, there is certain passivation repair ability to the heavy metal in soil, heavy metal in soil can be effectively reduced effective
State content, and with the increase of clay mineral sorbing material addition, passivation repairing effect is also improved therewith, proposed by the present invention
Clay mineral sorbing material, its preparation method is simple, and preparation cost is low, and gained clay mineral sorbing material is used for remediating heavy metal
Contaminated soil, processing time is short, and remediation efficiency is high, and rehabilitation cost is low, and will not cause any pollution to environment and soil, is worth
Promote.
Brief description of the drawings
Fig. 1 is a kind of clay mineral sorbing material of the restoration of soil polluted by heavy metal proposed in the embodiment of the present invention one,
And undressed palygorskite raw ore is to the result figure of the adsorption effect experiment of copper ion in water.
Embodiment
The invention provides a kind of clay mineral sorbing material of restoration of soil polluted by heavy metal, including palygorskite；
The palygorskite includes 56.96% SiO2, 23.83% Mg, Al, Fe and O, 19.21% crystallization water.
The clay mineral sorbing material main component is palygorskite, and the palygorskite preferably is selected from Baiyin.
Preferably, described Mg, Al, Fe and O mass ratio are：2.5~4：3~5：3.2~5.8：1~1.3.
Palygorskite is a kind of important substance for industries such as chemical industry, agricultural chemicals, national defence, medicine, building materials, light textiles, with very
Big specific surface area and adsorption capacity, with good rheological characteristic and catalytic performance, also with preferable colloidal property and heat-resisting
Performance.
A kind of preparation method of the clay mineral sorbing material of the invention that restoration of soil polluted by heavy metal is also provided, including with
Lower step：
S1, palygorskite raw material is placed under 105~135 DEG C of circulating air and dried to constant weight, by the palygorskite raw material after drying
It is placed in pulverizer, crosses 80~120 mesh sieves after fully crushing, obtain palygorskite powder A；
S2, by step S1 gained palygorskite powder A add to concentration for 4~8% hydrochloric acid solution in, with 360~480r/min
Rotating speed stirring mixing 1.5~2.5h, obtain compound B；
S3, the compound B of gained in step S2 stood into 20~30h, 76~88 DEG C of drying baker is placed in after being filtered
Interior drying obtains dried powder C to constant weight；
S4, by step S3 gained dried powder C be transferred in Muffle furnace, at 280~350 DEG C of high temperature, be calcined 3~5h,
Complete after roasting, room temperature is naturally cooled to needed for taking out and obtains clay mineral sorbing material described in the claim 1.
Preferably, the addition of hydrochloric acid solution is 2.2~3.5 times of palygorskite powder A amounts in the step S2.
Preferably, the filtering accuracy of filter is 130~175 mesh in the step S3.
Preferably, the sintering temperature in the step S4 is 320 DEG C, and roasting time is 4h.
By embodiment prepared by a kind of clay mineral sorbing material of restoration of soil polluted by heavy metal of the invention
Method is described in detail：
A kind of clay mineral sorbing material preparation method of restoration of soil polluted by heavy metal of the present invention, comprises the following steps：
S1, palygorskite raw material is placed under 125 DEG C of circulating air and dried to constant weight, the palygorskite raw material after drying is placed in powder
In broken machine, 85 mesh sieves are crossed after fully crushing, palygorskite powder A is obtained；
S2, by step S1 gained palygorskite powder A add to concentration for 6.5% hydrochloric acid solution in, the addition of hydrochloric acid solution
For 2.5 times of palygorskite powder A amounts, with 420r/min rotating speed stirring mixing 2.1h, compound B is obtained；
S3, the compound B standing 22h by gained in step S2, are placed in 838 DEG C of drying baker after being filtered and dry extremely
Constant weight, the filtering accuracy of filter is 150 mesh, obtains dried powder C；
S4, by step S3 gained dried powder C be transferred in Muffle furnace, at 320 DEG C of high temperature, be calcined 4h, complete roasting
Afterwards, naturally cool to room temperature needed for taking out and obtain clay mineral sorbing material.
The present invention is made with reference to specific embodiment further to explain.
Embodiment one
A kind of clay mineral sorbing material of restoration of soil polluted by heavy metal proposed by the present invention, the clay mineral sorbing material
Main component be palygorskite, SiO in the palygorskite256.96% is accounted for, Mg, Al, Fe, O account for 23.83% altogether, remaining 19.21% is
The mass ratio of the crystallization water, wherein Mg, Al, Fe and O is 4:5:5.8:1.3；
Its preparation method, comprises the following steps：
S1, the palygorskite raw material purchased from Baiyin is placed under 135 DEG C of circulating air and dried to constant weight, by the slope after drying
Thread stone raw material is placed in pulverizer, is crossed 120 mesh sieves after fully crushing, is obtained palygorskite powder A；
S2, by solid-liquid ratio 1:3.5, the palygorskite powder A of gained in step S1 is added in the hydrochloric acid solution for being 8% to concentration, with
480r/min rotating speed stirring mixing 2.5h, obtains compound B；
S3, the compound B standing 30h by gained in step S2,88 DEG C are placed in after being filtered through filtering accuracy for the filter of 175 mesh
Drying baker in drying to constant weight, obtain dried powder C；
S4, by step S3 gained dried powder C be transferred in Muffle furnace, at 350 DEG C of high temperature, be calcined 5h, complete roasting
Afterwards, naturally cool to room temperature needed for taking out and produce clay mineral sorbing material.
Embodiment two
A kind of clay mineral sorbing material of restoration of soil polluted by heavy metal proposed by the present invention, the clay mineral sorbing material
Main component be palygorskite, SiO in the palygorskite256.96% is accounted for, Mg, Al, Fe, O account for 23.83% altogether, remaining 19.21% is
The mass ratio of the crystallization water, wherein Mg, Al, Fe and O is 2.5:3:3.2:1；
Its preparation method, comprises the following steps：
S1, the palygorskite raw material purchased from Baiyin is placed under 105 DEG C of circulating air and dried to constant weight, by the slope after drying
Thread stone raw material is placed in pulverizer, is crossed 120 mesh sieves after fully crushing, is obtained palygorskite powder A；
S2, by solid-liquid ratio 1:2.2, the palygorskite powder A of gained in step S1 is added in the hydrochloric acid solution for being 4% to concentration, with
360r/min rotating speed stirring mixing 1.5h, obtains compound B；
S3, the compound B standing 20h by gained in step S2,76 DEG C are placed in after being filtered through filtering accuracy for the filter of 130 mesh
Drying baker in drying to constant weight, obtain dried powder C；
S4, by step S3 gained dried powder C be transferred in Muffle furnace, at 280 DEG C of high temperature, be calcined 3h, complete roasting
Afterwards, naturally cool to room temperature needed for taking out and produce clay mineral sorbing material.
Embodiment three
A kind of clay mineral sorbing material of restoration of soil polluted by heavy metal proposed by the present invention, the clay mineral sorbing material
Main component be palygorskite, SiO in the palygorskite256.96% is accounted for, Mg, Al, Fe, O account for 23.83% altogether, remaining 19.21% is
The mass ratio of the crystallization water, wherein Mg, Al, Fe and O is 3.8:4.5:3.5.4:1.2；
Its preparation method, comprises the following steps：
S1, the palygorskite raw material purchased from Baiyin is placed under 120 DEG C of circulating air and dried to constant weight, by the slope after drying
Thread stone raw material is placed in pulverizer, is crossed 100 mesh sieves after fully crushing, is obtained palygorskite powder A；
S2, by solid-liquid ratio 1:2.8, the palygorskite powder A of gained in step S1 is added in the hydrochloric acid solution for being 6% to concentration, with
420r/min rotating speed stirring mixing 2h, obtains compound B；
S3, the compound B standing 25h by gained in step S2,82 DEG C are placed in after being filtered through filtering accuracy for the filter of 155 mesh
Drying baker in drying to constant weight, obtain dried powder C；
S4, by step S3 gained dried powder C be transferred in Muffle furnace, at 320 DEG C of high temperature, be calcined 4h, complete roasting
Afterwards, naturally cool to room temperature needed for taking out and produce clay mineral sorbing material.
Example IV
A kind of clay mineral sorbing material of restoration of soil polluted by heavy metal proposed by the present invention, the clay mineral sorbing material
Main component be palygorskite, SiO in the palygorskite256.96% is accounted for, Mg, Al, Fe, O account for 23.83% altogether, remaining 19.21% is
The mass ratio of the crystallization water, wherein Mg, Al, Fe and O is 2.8:3.5:3.8:1.1；
Its preparation method, comprises the following steps：
S1, the palygorskite raw material purchased from Baiyin is placed under 130 DEG C of circulating air and dried to constant weight, by the slope after drying
Thread stone raw material is placed in pulverizer, is crossed 110 mesh sieves after fully crushing, is obtained palygorskite powder A；
S2, by solid-liquid ratio 1:3.2, the palygorskite powder A of gained in step S1 is added in the hydrochloric acid solution for being 7% to concentration, with
440r/min rotating speed stirring mixing 2.2h, obtains compound B；
S3, the compound B standing 28h by gained in step S2,84 DEG C are placed in after being the filtering of 165 mesh filters through filtering accuracy
Drying obtains dried powder C to constant weight in drying baker；
S4, by step S3 gained dried powder C be transferred in Muffle furnace, at 340 DEG C of high temperature, be calcined 3.5h, complete roasting
Room temperature, which is naturally cooled to, after burning, needed for taking out produces clay mineral sorbing material.
Embodiment five
A kind of clay mineral sorbing material of restoration of soil polluted by heavy metal proposed by the present invention, the clay mineral sorbing material
Main component be palygorskite, SiO in the palygorskite256.96% is accounted for, Mg, Al, Fe, O account for 23.83% altogether, remaining 19.21% is
The mass ratio of the crystallization water, wherein Mg, Al, Fe and O is 3.5:4:4.5:1.2；
Its preparation method, comprises the following steps：
S1, the palygorskite raw material purchased from Baiyin is placed under 110 DEG C of circulating air and dried to constant weight, by the slope after drying
Thread stone raw material is placed in pulverizer, is crossed 90 mesh sieves after fully crushing, is obtained palygorskite powder A；
S2, by solid-liquid ratio 1:2.5, the palygorskite powder A of gained in step S1 is added in the hydrochloric acid solution for being 4~8% to concentration,
With 380r/min rotating speed stirring mixing 1.8h, compound B is obtained；
S3, the compound B standing 22h by gained in step S2,80 DEG C are placed in after being the filtering of 140 mesh filters through filtering accuracy
Drying obtains dried powder C to constant weight in drying baker；
S4, by step S3 gained dried powder C be transferred in Muffle furnace, at 300 DEG C of high temperature, be calcined 4.5h, complete roasting
Room temperature, which is naturally cooled to, after burning, needed for taking out produces clay mineral sorbing material.
Embodiment six
A kind of clay mineral sorbing material of restoration of soil polluted by heavy metal proposed by the present invention, the clay mineral sorbing material
Main component be palygorskite, SiO in the palygorskite256.96% is accounted for, Mg, Al, Fe, O account for 23.83% altogether, remaining 19.21% is
The mass ratio of the crystallization water, wherein Mg, Al, Fe and O is 4:3:5.8:1；
Its preparation method, comprises the following steps：
S1, the palygorskite raw material purchased from Baiyin is placed under 125 DEG C of circulating air and dried to constant weight, by the slope after drying
Thread stone raw material is placed in pulverizer, is crossed 100 mesh sieves after fully crushing, is obtained palygorskite powder A；
S2, by solid-liquid ratio 1:3, the palygorskite powder A of gained in step S1 is added in the hydrochloric acid solution for being 6% to concentration, with
400r/min rotating speed stirring mixing 1.5h, obtains compound B；
S3, the compound B standing 30h by gained in step S2,85 DEG C are placed in after being the filtering of 150 mesh filters through filtering accuracy
Drying obtains dried powder C to constant weight in drying baker；
S4, by step S3 gained dried powder C be transferred in Muffle furnace, at 300 DEG C of high temperature, be calcined 5h, complete roasting
Afterwards, naturally cool to room temperature needed for taking out and produce clay mineral sorbing material.
The clay mineral sorbing material prepared in the embodiment of the present invention one is used respectively with undressed palygorskite raw ore
Copper ion in absorption water, designs the adsorption effect experiment to copper ion in water as follows：
The clay mineral sorbing material of preparation, undressed each 5g of palygorskite raw ore is taken to add to 500mL copper contents respectively
In 1000mg/L conical flask, 150rpm persistent oscillation 90min take 10mL solution centrifugals to separate per 10min, take supernatant to determine
Copper content, and then the polluted by copper amount of two kinds of sorbing materials is extrapolated, and then obtain adsorption saturation time and maximal absorptive capacity；Every group
Processing set 3 it is parallel.Testing result, which is arranged, sees Fig. 1.
Result of the test shows that two kinds of sorbing materials reach adsorption saturation after vibration 40min；The wherein embodiment of the present invention
The maximal absorptive capacity average out to 42.6mg/g of the clay mineral sorbing material prepared in one, and undressed palygorskite raw ore is most
Big adsorbance is 27.1mg/g；As can be seen here, the clay mineral sorbing material prepared in the embodiment of the present invention one is more unprocessed
Palygorskite raw ore adsorption capacity lifting 57.2%.
The clay mineral sorbing material prepared in the embodiment of the present invention one is used to repair by copper, cadmium pollution soil, design
Recovery dynatron effect experiment to copper, cadmium pollution soil is as follows：
Certain electronic waste is picked up from for examination soil and disassembles place, and copper, cadmium bio-available Zn concentration are respectively 235mg/kg and 0.516mg/kg；
Recovery dynatron effect experimental study is carried out using potted plant experiment mode, it is 1kg to be measured per basin for soil on probation；4 groups of processing, clay ore deposit are set
The addition of thing sorbing material is respectively 0,5g, 10g, 20g, and every group of processing setting 3 is parallel；Soil and clay mineral are adsorbed
Material is stirred and evenly mixed, and controls moisture content to carry out the copper in each processing samples-soil, cadmium bio-available Zn concentration after 25~30%, 10d
Detection, draws following result：
As seen from the above table, the clay mineral sorbing material prepared in the embodiment of the present invention one, it is equal to the heavy metal copper in soil, cadmium
With certain passivation repair ability；Wherein, Available cupper deactivation rate is up to 62.34%, and effective cadmium deactivation rate is up to 86.01%；
As can be seen here, the clay mineral sorbing material for preparing of the present invention can effectively reduce heavy metal in soil bio-available Zn concentration, and with
The increase of clay mineral sorbing material addition, passivation repairing effect is also improved therewith.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (6)
1. the clay mineral sorbing material of a kind of restoration of soil polluted by heavy metal, it is characterised in that including palygorskite；
The palygorskite includes 56.96% SiO2, 23.83% Mg, Al, Fe and O, 19.21% crystallization water.
2. the clay mineral sorbing material of restoration of soil polluted by heavy metal according to claim 1, it is characterised in that described
Mg, Al, Fe and O mass ratio is：2.5~4：3~5：3.2~5.8：1~1.3.
3. a kind of preparation method of the clay mineral sorbing material of restoration of soil polluted by heavy metal, comprises the following steps：
S1, palygorskite raw material is placed under 105~135 DEG C of circulating air and dried to constant weight, by the palygorskite raw material after drying
It is placed in pulverizer, crosses 80~120 mesh sieves after fully crushing, obtain palygorskite powder A；
S2, by step S1 gained palygorskite powder A add to concentration for 4~8% hydrochloric acid solution in, with 360~480r/min
Rotating speed stirring mixing 1.5~2.5h, obtain compound B；
S3, the compound B of gained in step S2 stood into 20~30h, 76~88 DEG C of drying baker is placed in after being filtered
Interior drying obtains dried powder C to constant weight；
S4, by step S3 gained dried powder C be transferred in Muffle furnace, at 280~350 DEG C of high temperature, be calcined 3~5h,
Complete after roasting, room temperature is naturally cooled to needed for taking out and obtains clay mineral sorbing material described in the claim 1.
4. a kind of preparation method of the clay mineral sorbing material of restoration of soil polluted by heavy metal according to claim 3,
Characterized in that, the addition of hydrochloric acid solution is 2.2~3.5 times of palygorskite powder A amounts in the step S2.
5. a kind of preparation method of the clay mineral sorbing material of restoration of soil polluted by heavy metal according to claim 3,
Characterized in that, the filtering accuracy of filter is 130~175 mesh in the step S3.
6. a kind of preparation method of the clay mineral sorbing material of restoration of soil polluted by heavy metal according to claim 3,
Characterized in that, the sintering temperature in the step S4 is 320 DEG C, roasting time is 4h.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109734421A (en) * | 2018-12-18 | 2019-05-10 | 佛山市铁人环保科技有限公司 | A kind of place heavy-metal contaminated soil disposal of resources method |
| CN109824427A (en) * | 2019-01-25 | 2019-05-31 | 兰州大学 | A kind of Slow-release organic fertilizer improving heavy metal pollution of soil |
| CN109824426A (en) * | 2019-01-25 | 2019-05-31 | 兰州大学 | A kind of slow release fertilizer improving heavy metal pollution of soil |
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| CN109824427A (en) * | 2019-01-25 | 2019-05-31 | 兰州大学 | A kind of Slow-release organic fertilizer improving heavy metal pollution of soil |
| CN109824426A (en) * | 2019-01-25 | 2019-05-31 | 兰州大学 | A kind of slow release fertilizer improving heavy metal pollution of soil |
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