CN106734130A - A kind of improving salinization soil red mud base modified soil renovation agent and preparation method thereof - Google Patents
A kind of improving salinization soil red mud base modified soil renovation agent and preparation method thereof Download PDFInfo
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- CN106734130A CN106734130A CN201611198141.4A CN201611198141A CN106734130A CN 106734130 A CN106734130 A CN 106734130A CN 201611198141 A CN201611198141 A CN 201611198141A CN 106734130 A CN106734130 A CN 106734130A
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- red mud
- zeolite
- soil
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Classifications
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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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Treatment Of Sludge (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of improving salinization soil red mud base modified soil renovation agent, it is made up of the raw material of following weight portion：53 74 parts of red mud, 16 23 parts of zeolite distills appropriate amount of water, 20 30 parts of humus, 25 parts of land plaster, 1.0mol/L NaCl solutions are appropriate, 47 parts of iron chloride, 25 parts of ferrous sulfate, appropriate concentrated ammonia liquor, 24 parts of anhydrous sodium sulfate, 0.5 2 parts of chelated zinc, 0.5 1 parts of calcium superphosphate.The present invention is combined zeolite with magnetic iron oxide particle, it is prepared for the magnetic zeolite complex with characterization of adsorption, because heavy metal element remains in the secondary pollution problem produced in soil when avoiding conventional treatment, processed with the granulation of red mud particles coat afterwards, reach control sustained release OH‑The effect of ion, reduces red mud free alkali rate of release, is advantageously implemented effective stable curing of heavy metal in soil ion.
Description
Technical field
The invention belongs to heavy metal pollution of soil Treatment process field, relate more specifically to a kind of improving salinization soil and use
Red mud base modified soil renovation agent and preparation method thereof.
Background technology
Heavy metal pollution of soil refers to that due to mankind's activity, the content of minor metallic element in soil in soil exceedes
Background value, excess deposition and the too high levels that cause, are referred to as heavy metal pollution of soil.And farmland soil heavy metals pollution has huge
Big harmfulness, heavy metal in soil pollution can not only cause crop production reduction and quality decline, can also be by soil-plant
System, human body is entered through food chain, is detrimental to health and life security.
Red mud is the residue of generation in aluminum oxide production process, and the oxide containing abundant iron, aluminium and calcium can reduce gold
The solubility and bioavilability of category, continual and steady solidification is played by discharging OH ion pair heavy metal in soil, can be made
It is the stabilizing and curing agent of heavy-metal contaminated soil.But, when current red mud is applied to pollution control and restoration of the ecosystem substantially still
Red mud powder directly is utilized, because its free alkali discharges too fast, causes the soil pH rate of climb quickly, to vegetation and the micro- life of soil
Thing causes serious harm.
Luo Huili, Huang Shengsheng et al. are at it《Red mud modified particles repair materials and its steady to the original position of lead Grown In Zinc Contaminated Soil
Fixedization is studied》In one text, using the potential gelling of aluminum oxide industry waste residue-red mud, drum granulating prepares red mud-phosphorus under normal temperature
Composite particles, and it is applied to the stabilisation reparation in situ of lead Grown In Zinc Contaminated Soil, although red mud-phosphorus composite soil prepared by the method
Renovation agent can neutralize the OH of part red mud-, but the accumulation of Soil Phosphorus is easily caused, phosphorus enrichment is asked in causing surface water
Topic.
Humus contains various functional groups, such as carboxyl, alcoholic extract hydroxyl group, phenolic hydroxyl group, carbonyl and methoxyl group, with very high
Reactivity, itself is a kind of hydrophilic colloid, is the macromolecule mixture with negative electrical charge, with faintly acid.Humus leads to
Cross covalent bond, micro-porous adsorption, hydrophobic adsorbent, hydrogen bond, ionic bond, electronics and the absorption mechanism such as give-receive, can with soil in have
Malicious pollutant and its catabolite etc. interact.
Therefore, the present invention is combined zeolite with magnetic iron oxide particle, is prepared for the magnetic zeolite with characterization of adsorption and is answered
It is fit, it is to avoid because heavy metal element remains in the secondary pollution problem produced in soil during conventional treatment, afterwards with it is red
The granulation of mud particles coat is processed, and reaches control sustained release OH-The effect of ion, reduces red mud free alkali rate of release, is conducive to
Realize effective stable curing of heavy metal in soil ion.
The content of the invention
In view of the shortcomings of the prior art, repaired with red mud base modified soil the invention provides a kind of improving salinization soil
Agent and preparation method thereof.
A kind of improving salinization soil red mud base modified soil renovation agent, is made up of the raw material of following weight portion：Red mud
53-74 parts, zeolite 16-23 parts, appropriate amount of water is distilled, humus 20-30 parts, land plaster 2-5 parts, 1.0mol/L NaCl solutions are fitted
Amount, iron chloride 4-7 parts, ferrous sulfate 2-5 parts, appropriate concentrated ammonia liquor, anhydrous sodium sulfate 2-4 parts, chelated zinc 0.5-2 parts, peroxophosphoric acid
Calcium 0.5-1 parts.
Comprise the following steps that：
（1）The preparation of magnetic zeolite：
1., compound concentration is 1.0mol/L NaCl solutions, is 1 by zeolite and NaCl solution:10 mass ratio, is added thereto to
Zeolite, is placed in 20-40 DEG C of thermostat water bath afterwards, mechanical agitation 2-3 hours, then with distillation water washing, mistake
Filter, drying, grinding obtain final product na-pretreated zeolite；
2., above-mentioned na-pretreated zeolite is added in 3-5 times of distilled water, stirring forms suspension, adds iron chloride, ferrous sulfate
Stirring mixing, is placed in 60-80 DEG C of thermostat water bath and stirs 2-3 hours, arrives concentrated ammonia liquor fast drop while stirring
In suspension system, the pH values of solution are made to be stirred for 10-25 minutes after reaching 11-12, afterwards by reaction system at 60-80 DEG C
It is aged 1-3 hour in thermostat water bath, with distillation water washing black precipitate, is filtered, perseverance is dried under vacuum in 70-90 DEG C
Weight, grinding obtains final product magnetic zeolite；
（2）The preparation of magnetic zeolite/humus composite colloid：
Humus is distilled into water dissolves with 3-5 times and is configured to solution, heated 20-40 minutes in 40-60 DEG C of water-bath, add step
（1）Magnetic zeolite, mechanical agitation 1-3 hours under water bath condition, after being cooled to room temperature, dries, shape under the conditions of being placed in 70-90 DEG C
Into dark brown crystal, grind into powder crosses 50-80 mesh sieves, obtains final product magnetic zeolite/humus composite colloid；
（3）Red mud base modified particles：
1., red mud is placed in calcining furnace, is cooled down after being calcined 20-30 minutes at 200-300 DEG C and taken out, 50- is crossed after crushing
100 mesh sieves, it is standby to obtain red mud particle, and chelated zinc, calcium superphosphate are dissolved in distilled water in addition, standby；
2., by above-mentioned red mud particle, step（2）Magnetic zeolite/humus composite colloid, land plaster, anhydrous sodium sulfate mixing, stir
Mix 2-4 hours, be well mixed all powders, put mixed powder in granulating disc, control granulates rotating speed 20-40r/
Min, by 0.4-0.6:1 ratio of mud sprays into the aqueous solution containing chelated zinc, calcium superphosphate, is placed in and balling-up is granulated in comminutor
；
（4）By step（3）Gained particle natural air drying 30-40 hours, the green-ball after air-drying afterwards dries 5-7 in 40-50 DEG C
Hour, natural cooling obtains red mud base modified soil renovation agent.
Wherein, described red mud base modified soil renovation agent is graininess, and it is shaped as the spherical of particle diameter 2- 3mm.
Compared with prior art, the present invention has advantages below：
（1）Zeolite is combined with magnetic iron oxide particle in the present invention, is prepared for the magnetic zeolite complex with characterization of adsorption,
On the one hand make in magnetic zeolite containing more micropore and mesoporous, increase its specific surface area so that the absorption property enhancing of zeolite,
On the other hand its magnetic property can make renovation agent of the present invention after use, can make saturated zeolite from soil by simple magnetic separation process
Separated in earth, it is to avoid because heavy metal element remains in the secondary pollution problem produced in soil, realization during conventional treatment
Zeolite is recycled；Compounded with the humus containing weak acid performance afterwards, obtain the magnetic boiling with various reactivities
Stone/humus composite colloid, can occur complex reaction with metal ion well, suppress the migration of heavy metal, in addition humic
The presence of matter can strengthen catalase activity in crop body, accelerate plant physiology metabolism, promote the growth of plant.
（2）The present invention is carried out magnetic zeolite/humus composite colloid and red mud particle using the potential gelling of red mud
Cladding granulation treatment, can be such that red mud alkaline matter is coated in the lattice of colloidal solid or interstitial void, slow so as to reach control
Release OH-The effect of ion, reduces red mud free alkali rate of release, suppresses the too fast problem of the soil pH rate of climb, retains
The stronger absorption property of red mud raw material, reaches and effectively facilitates the residual form that each form heavy metal in contaminated soil continues to stabilization
Conversion, solves the problems, such as heavy-metal contaminated soil, the purpose of the treatment of wastes with processes of wastes against one another is reached, with application value and Environmental Effect higher
Benefit.
（3）The chelated zinc of present invention addition, calcium superphosphate are rapidly dissolvable in water, can absorb profit by crops rapidly
With, micro- shortage problem in arable land and salinization soil is solved, there is the effect that water conservation loosens the soil, soil with reference to anhydrous sodium sulfate
After earth becomes loose, there is provided the transparency of salt affected soil, promote to be drenched under saline and alkaline nitre, the element silicon of high content can in zeolite in addition
Effectively supplement salinization soil reaches the effect of effective improving salinization soil to the demand of element silicon.
Specific embodiment
A kind of improving salinization soil red mud base modified soil renovation agent, is made up of the raw material of following weight portion：Red mud
68 parts, 19 parts of zeolite distills appropriate amount of water, and 25 parts of humus, 4 parts of land plaster, 1.0mol/L NaCl solutions are appropriate, iron chloride 6
Part, 4 parts of ferrous sulfate, appropriate concentrated ammonia liquor, 3 parts of anhydrous sodium sulfate, 1 part of chelated zinc, 0.8 part of calcium superphosphate.
Comprise the following steps that：
（1）The preparation of magnetic zeolite：
1., compound concentration is 1.0mol/L NaCl solutions, is 1 by zeolite and NaCl solution:10 mass ratio, is added thereto to
Zeolite, is placed in 30 DEG C of thermostat water bath afterwards, mechanical agitation 2.5 hours, then with distillation water washing, filtering, baking
Dry, grinding obtains final product na-pretreated zeolite；
2., above-mentioned na-pretreated zeolite is added in 4 times of distilled water, stirring forms suspension, adds iron chloride, ferrous sulfate to stir
Mixing is mixed, is placed in 70 DEG C of thermostat water bath and is stirred 2.5 hours, by concentrated ammonia liquor fast drop to suspended substance while stirring
In system, the pH values of solution are made to be stirred for 20 minutes after reaching 11.5, afterwards by reaction system in 70 DEG C of thermostat water bath
Ageing 2 hours, with distillation water washing black precipitate, filtering, in 80 DEG C of the constant weight that is dried under vacuum to, grinding obtains final product magnetic boiling
Stone；
（2）The preparation of magnetic zeolite/humus composite colloid：
Humus is configured to solution with 4 times of distillation water dissolves, is heated 30 minutes in 50 DEG C of water-baths, add step（1）Magnetic
Zeolite, mechanical agitation 2 hours under water bath condition after being cooled to room temperature, are dried under the conditions of being placed in 80 DEG C, form dark brown brilliant
Body, grind into powder crosses 80 mesh sieves, obtains final product magnetic zeolite/humus composite colloid；
（3）Red mud base modified particles：
1., red mud is placed in calcining furnace, is cooled down after being calcined 25 minutes at 300 DEG C and taken out, 80 mesh sieves are crossed after crushing, obtain red
Mud particle is standby, and chelated zinc, calcium superphosphate are dissolved in distilled water in addition, standby；
2., by above-mentioned red mud particle, step（2）Magnetic zeolite/humus composite colloid, land plaster, anhydrous sodium sulfate mixing, stir
Mix 3 hours, be well mixed all powders, put mixed powder in granulating disc, control granulation rotating speed 30r/min is pressed
0.5:1 ratio of mud sprays into the aqueous solution containing chelated zinc, calcium superphosphate, is placed in and balling-up is granulated in comminutor；
（4）By step（3）Gained particle natural air drying 36 hours, the green-ball after air-drying afterwards is dried 6 hours in 45 DEG C, natural
Cooling, obtains red mud base modified soil renovation agent.
Wherein, described red mud base modified soil renovation agent is graininess, and it is shaped as the spherical of particle diameter 2-3mm.
In order to further illustrate application value of the invention, inventor chooses one piece of heavy-metal contaminated soil and uses this hair
Bright renovation agent carries out the checking of repairing effect, and wherein content of heavy metal lead is 132.12mg/kg.
60 days after reparation, Lead In Soil content is 62.89 mg/kg；90 days after reparation, Lead In Soil content is 21.14
mg/kg。
Claims (3)
1. a kind of improving salinization soil red mud base modified soil renovation agent, it is characterised in that by the raw material of following weight portion
Composition：Red mud 53-74 parts, zeolite 16-23 parts, distill appropriate amount of water, humus 20-30 parts, land plaster 2-5 parts, 1.0mol/L
Appropriate NaCl solution, iron chloride 4-7 parts, ferrous sulfate 2-5 parts, appropriate concentrated ammonia liquor, anhydrous sodium sulfate 2-4 parts, chelated zinc 0.5-2
Part, calcium superphosphate 0.5-1 parts.
2. the preparation side of red mud base modified soil renovation agent of a kind of improving salinization soil according to claims 1
Method, it is characterised in that comprise the following steps that：
（1）The preparation of magnetic zeolite：
1., compound concentration is 1.0mol/L NaCl solutions, is 1 by zeolite and NaCl solution:10 mass ratio, is added thereto to
Zeolite, is placed in 20-40 DEG C of thermostat water bath afterwards, mechanical agitation 2-3 hours, then with distillation water washing, mistake
Filter, drying, grinding obtain final product na-pretreated zeolite；
2., above-mentioned na-pretreated zeolite is added in 3-5 times of distilled water, stirring forms suspension, adds iron chloride, ferrous sulfate
Stirring mixing, is placed in 60-80 DEG C of thermostat water bath and stirs 2-3 hours, arrives concentrated ammonia liquor fast drop while stirring
In suspension system, the pH values of solution are made to be stirred for 10-25 minutes after reaching 11-12, afterwards by reaction system at 60-80 DEG C
It is aged 1-3 hour in thermostat water bath, with distillation water washing black precipitate, is filtered, perseverance is dried under vacuum in 70-90 DEG C
Weight, grinding obtains final product magnetic zeolite；
（2）The preparation of magnetic zeolite/humus composite colloid：
Humus is distilled into water dissolves with 3-5 times and is configured to solution, heated 20-40 minutes in 40-60 DEG C of water-bath, add step
（1）Magnetic zeolite, mechanical agitation 1-3 hours under water bath condition, after being cooled to room temperature, dries, shape under the conditions of being placed in 70-90 DEG C
Into dark brown crystal, grind into powder crosses 50-80 mesh sieves, obtains final product magnetic zeolite/humus composite colloid；
（3）Red mud base modified particles：
1., red mud is placed in calcining furnace, is cooled down after being calcined 20-30 minutes at 200-300 DEG C and taken out, 50- is crossed after crushing
100 mesh sieves, it is standby to obtain red mud particle, and chelated zinc, calcium superphosphate are dissolved in distilled water in addition, standby；
2., by above-mentioned red mud particle, step（2）Magnetic zeolite/humus composite colloid, land plaster, anhydrous sodium sulfate mixing, stir
Mix 2-4 hours, be well mixed all powders, put mixed powder in granulating disc, control granulates rotating speed 20-40r/
Min, by 0.4-0.6:1 ratio of mud sprays into the aqueous solution containing chelated zinc, calcium superphosphate, is placed in and balling-up is granulated in comminutor
；
（4）By step（3）Gained particle natural air drying 30-40 hours, the green-ball after air-drying afterwards dries 5-7 in 40-50 DEG C
Hour, natural cooling obtains red mud base modified soil renovation agent.
3. the preparation side of red mud base modified soil renovation agent of a kind of improving salinization soil according to claims 2
Method, it is characterised in that described red mud base modified soil renovation agent is graininess, and it is shaped as the spherical of particle diameter 2- 3mm.
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Cited By (6)
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| CN108048109A (en) * | 2017-12-20 | 2018-05-18 | 北京东方复地环境科技有限公司 | It is a kind of for multi-functional passivator of paddy fields in south china heavy metal-polluted soil Cd and preparation method thereof |
| CN109111927A (en) * | 2018-08-14 | 2019-01-01 | 东南大学 | A kind of heavy metal pollution sandy soil curing agent and its application method |
| CN109852393A (en) * | 2019-01-07 | 2019-06-07 | 黑龙江大学 | A kind of water-retaining type heavy-metal contaminated soil repairs the preparation method and applications of particle |
| CN113617820A (en) * | 2021-08-18 | 2021-11-09 | 东华大学 | Passivation method and application of heavy metals in red mud |
| CN116120812A (en) * | 2023-03-20 | 2023-05-16 | 广西福宝信科技有限公司 | Electric insulation powder coating containing modified red mud and preparation method thereof |
| CN117247249A (en) * | 2023-11-17 | 2023-12-19 | 石家庄铁道大学 | Reinforced phase-change concrete and preparation method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108048109A (en) * | 2017-12-20 | 2018-05-18 | 北京东方复地环境科技有限公司 | It is a kind of for multi-functional passivator of paddy fields in south china heavy metal-polluted soil Cd and preparation method thereof |
| CN109111927A (en) * | 2018-08-14 | 2019-01-01 | 东南大学 | A kind of heavy metal pollution sandy soil curing agent and its application method |
| CN109111927B (en) * | 2018-08-14 | 2020-07-31 | 东南大学 | Heavy metal polluted sandy soil curing agent and application method thereof |
| CN109852393A (en) * | 2019-01-07 | 2019-06-07 | 黑龙江大学 | A kind of water-retaining type heavy-metal contaminated soil repairs the preparation method and applications of particle |
| CN113617820A (en) * | 2021-08-18 | 2021-11-09 | 东华大学 | Passivation method and application of heavy metals in red mud |
| CN116120812A (en) * | 2023-03-20 | 2023-05-16 | 广西福宝信科技有限公司 | Electric insulation powder coating containing modified red mud and preparation method thereof |
| CN116120812B (en) * | 2023-03-20 | 2023-12-12 | 广西福宝信科技有限公司 | Electric insulation powder coating containing modified red mud and preparation method thereof |
| CN117247249A (en) * | 2023-11-17 | 2023-12-19 | 石家庄铁道大学 | Reinforced phase-change concrete and preparation method thereof |
| CN117247249B (en) * | 2023-11-17 | 2024-01-16 | 石家庄铁道大学 | Reinforced phase-change concrete and preparation method thereof |
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