CN110092695A - It is a kind of for repairing the soil conditioner and preparation method thereof in cadmium arsenic combined pollution farmland - Google Patents
It is a kind of for repairing the soil conditioner and preparation method thereof in cadmium arsenic combined pollution farmland Download PDFInfo
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- CN110092695A CN110092695A CN201910348408.0A CN201910348408A CN110092695A CN 110092695 A CN110092695 A CN 110092695A CN 201910348408 A CN201910348408 A CN 201910348408A CN 110092695 A CN110092695 A CN 110092695A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/20—Silicates
- C01B33/36—Silicates having base-exchange properties but not having molecular sieve properties
- C01B33/38—Layered base-exchange silicates, e.g. clays, micas or alkali metal silicates of kenyaite or magadiite type
- C01B33/40—Clays
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D3/00—Calcareous fertilisers
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D3/00—Calcareous fertilisers
- C05D3/02—Calcareous fertilisers from limestone, calcium carbonate, calcium hydrate, slaked lime, calcium oxide, waste calcium products
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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Abstract
The present invention provides a kind of for repairing the soil conditioner and preparation method thereof in cadmium arsenic combined pollution farmland, including following raw material: 5-20 parts of 40-50 parts of calcareous fertilisers, 20-30 parts of fertiliser containing magnesium, 10-20 parts of siliceous fertilizer, 5-10 parts of humic acid and the pillared attapulgite of iron carbonyl.Compared with prior art, it provided by the present invention for the soil conditioner in reparation cadmium arsenic combined pollution farmland, can effectively inhibit the migration of cadmium and arsenic in agricultural land soil simultaneously, cadmium and arsenic are passivated based on agricultural land soil and two aspect of crops.And raw material is mostly natural minerals composition, and inexpensive, materials are easy, are conducive to industrial production.The soil conditioner of production contains calcium, magnesium, siliceous fertilizer etc., and effective activation simultaneously supplements soil because being acidified the nutrients such as fixed calcium, phosphorus, potassium, can achieve the effect of balance fertilizing in use.This soil conditioner production method is simple, it is easy, with the prospect being widely popularized.
Description
Technical field
The invention belongs to agricultural land soil recovery technique fields, and solving agricultural land soil cadmium arsenic combined pollution leads to cadmium in crops
The exceeded problem of arsenic can effectively inhibit the soil conditioner of heavy metal cadmium and arsenic migration in agricultural land soil.More particularly to one
Plant the soil conditioner and preparation method thereof for repairing cadmium arsenic combined pollution farmland
Background technique
In recent years, it with China's rapid economic development, industrializes, the deep propulsion of urbanization and agricultural modernization, soil
Heavy metal pollution problem is increasingly serious.
In heavy-metal composite pollution, cadmium arsenic combined pollution is the pollution form of heavy metal pollution weight most serious.Cadmium and arsenic exist
Biogenic migration and toxicity in soil is relatively strong, is easily absorbed by crops and accumulates, directly affects the quality and matter of crops
Amount, enters animals and humans body eventually by food chain, constitutes and seriously endangers to human health.
The farmland source Ge Shen mainly includes industrial activities, sewage irrigation, atmospheric sedimentation, the agricultural input products such as mining smelting
Deng.The cadmium arsenic of mining smelting activity release causes region large area farmland pollution by wind-force, water conservancy diffusion, typical such as Xiang River
Basin, the basin Diao Jiang, the river Bi basin.Atmosphere cadmium, arsenic are mostly derived from combustion of fossil fuel, metal smelt and traffic exhaust gas discharge
Deng atmosphere cadmium, arsenic pollution are in extensive range.Fertilizer and pesticide are also the important sources of arsenic, be used for a long time pesticide containing arsenic, insecticide,
The farmland of herbicide, residual arsenic reach 2g/kg, and organic fertilizer, phosphate fertilizer, sludge and feces of livestock and poultry are also to cause arable land cadmium, arsenic pollution
An important factor for.Therefore, how effectively to administer by the agricultural land soil of cadmium arsenic combined pollution have become one it is urgently to be resolved great
Problem.
The patent of Guangxi University Publication No. CN108003886A discloses a kind of remediating heavy metal on May 8th, 2018
The composite passivant and its application method of combined pollution agricultural land soil.It is formed using silkworm excrement and reduced iron powder as primary raw material, matter
Measure ratio are as follows: silkworm excrement 20%~33.3%, reduced iron powder 66.7%~80%.In use, decomposed silkworm excrement and reduced iron powder is same
When be added into contaminated soil, mixed well with soil.The composite passivant can be improved by improving soil pH value and organic matter
Soil physico-chemical property reduces soil available.But since silkworm excrement is biological passivator, it is blunt to be unfavorable for long-time stable
Change, while more difficult large scale collection, is not easy large-scale promotion.In addition, dosage reaches 3%~6%, applied much higher than current mu blunt
Change material utilization amount.
The patent of Agricultural University Of Hunan Publication No. CN107999524A discloses a kind of utilize on May 8th, 2018 and gives birth to
The method that object skinning is passivated heavy metal cadmium arsenic in rice field.It in paddy soil, and is trained biological breadcrust provenance artificial infection
It educates, makes its fast-growth, absorb fixed heavy metal cadmium arsenic.But need to keep the wet of inoculation ground after being inoculated with biological breadcrust provenance,
Operation of pouring water is paid attention within biological breadcrust growth period, should avoid arid, and avoiding hypervolia to wash away again keeps biological breadcrust poly-
Integrated package carries out broad irrigation when biological breadcrust largely survives and native table is in light green color, and water depth is no more than
10.0cm.It is big that biological breadcrust provenance acquires screening operation amount, and in order to keep biological breadcrust well-grown, to field management requirement
It is high.
The patent of Guangdong Prov. Inst. of Ecological Environment & Soil Science Publication No. CN104388094A is in public affairs on March 4th, 2015
A kind of iron-based biological carbon materials, its preparation process and its application in remediation contaminated soil are opened.The invention is prepared for one
The iron-based biological carbon materials of kind are for administering heavy metal in soil pollution.Since during preparing charcoal, iron containing compounds are pressed
It is uniformly mixed in certain ratio incorporation biomass, forms the iron-based biological raw material of wood-charcoal with special construction and function through high temperature carbonization
Material.Although iron-based biological carbon materials can reduce the arsenic cadmium content in the agricultural product planted in arsenic cadmium combined pollution soil.But
The iron-based biological carbon materials dosage is big (3%), and production technology is complicated, is unfavorable for large-scale promotion.
Summary of the invention
The purpose of the present invention is to provide a kind of for repairing the soil conditioner in cadmium arsenic combined pollution farmland, can be effective
Inhibit agricultural land soil in cadmium and arsenic migration, be passivated agricultural land soil in cadmium and arsenic, energy obvious to agricultural land soil repairing effect
Effectively facilitate the soil conditioner that crops absorb microelement.
Another object of the present invention is to provide a kind of for repairing the preparation of the soil conditioner in cadmium arsenic combined pollution farmland
Method, raw material is simple, preparation is easy, low in cost, improves soil pollution situation significant effect, and it is compound to solve agricultural land soil cadmium arsenic
Pollution leads to the problem that cadmium arsenic is exceeded in crops.
The present invention has technical solution as follows:
It is a kind of for repairing the soil conditioner in cadmium arsenic combined pollution farmland, including following raw material:
40-50 parts of calcareous fertilisers, 20-30 parts of fertiliser containing magnesium, 10-20 parts of siliceous fertilizer, 5-10 parts of humic acid and the pillared bumps of iron carbonyl
5-20 parts of stick soil.
The pillared attapulgite granularity of iron carbonyl is 100-200 mesh.
The pillared attapulgite of the iron carbonyl the preparation method comprises the following steps:
1) attapulgite is mixed with water according to volume ratio 1:2, ball milling obtains attapulgite slurry；
2) the pillared liquid of iron carbonyl is added in attapulgite slurry, after reaction, is aged, washing, then dry, grinding to get
The pillared attapulgite of iron carbonyl.
Attapulgite granularity described in step 1) is 100-200 mesh.
The pillared liquid of iron carbonyl described in step 2) the preparation method comprises the following steps: under the conditions of aeration stirring, by ferrous salt solution pH
Value is adjusted to 6~9, then places ageing at room temperature for 24 hours to get the pillared liquid of iron carbonyl.
The ferrous salt solution is ferrous sulfate solution or solution of ferrous chloride, preferably ferrous sulfate solution.
It is described that ferrous salt solution pH value is adjusted to 6~9, it is directed to ferrous salt solution and NaOH or Ca (OH) is added2Solution
Afterwards, add water that pH value is adjusted to 6~9；Or NaOH or Ca (OH) is added to ferrous salt solution2PH value is adjusted to 6~9 by solution.
The aeration stirring, specifically: it is stirred with air or pure oxygen aeration, aeration stirring to solution colour is to dark red
Color.
When the pillared liquid of iron carbonyl being added in step 2), molysite/attapulgite=5~15mmol/g in pillared liquid is controlled.
It is reacted described in step 2, refers to and reacted 3~6 hours under the conditions of speed of agitator is 150~250r/min, reaction temperature
Degree is 40~70 DEG C；
Described in step 2) ageing be room temperature be aged, digestion time be 8~for 24 hours；
Washing described in step 2) is centrifugation or filtering and washing, washing filtrate to no Cl-Or without SO4 2-。Cl-Use AgNO3
Detection, SO4 2-Use BaCl2Solution detection.
Drying temperature described in step 2) is 80~120 DEG C, and drying time is 3~6h；
Ground 100~200 mesh in step 2).
Calcareous fertilisers, fertiliser containing magnesium and the siliceous fertilizer, granularity are 100-200 mesh.
The calcareous fertilisers include one of dolomite dust, calcium oxide, conch meal, land plaster, calcium carbonate or calcium hydroxide or
Person is a variety of.
The fertiliser containing magnesium includes one or more of dolomite dust, magnesia or magnesia.
The siliceous fertilizer includes one of red mud, disiloxane, polysiloxanes, sodium metasilicate or waterglass or a variety of.
The humic acid water solubility content of humic acid (butt) >=60%, granularity are 20-120 mesh.
The conch meal refers to shell by high-temperature calcination powder pulverized powder, and 95% main component is calcium carbonate.
The main component of the magnesia is magnesia, using magnisite as raw material, is forged at a temperature of 800~850 DEG C
It burns, is a kind of air-setting cementing material of fine-powdered.
The red mud is that aluminium industry extracts the pollution waste residue being discharged when aluminium oxide.
The commercially available acquisition of above-mentioned all material, or can be obtained according to producer's self-condition by prior art preparation.
It is provided by the invention a kind of for repairing the preparation method of the soil conditioner in cadmium arsenic combined pollution farmland:
According to formula, each raw material is uniformly mixed through batch mixer, be can be obtained for repairing cadmium arsenic combined pollution farmland
Soil conditioner.
Provided by the present invention for repairing the soil conditioner in cadmium arsenic combined pollution farmland, it is based on agricultural land soil and crops
Two aspects are passivated heavy metal substance, to reduce the content of cadmium and arsenic in crop and fruit.Improve soil pH value, cation
The physicochemical properties such as exchange capacity (CEC), by heavy metal in soil from, to not converting using state, reducing it in the soil using state
Activity and migration, thus reduce heavy metal-polluted soil biological toxicity and reduce its migration and product in crop products
Tired amount.
Firstly, the pillared attapulgite of iron carbonyl is to utilize the expansiveness of attapulgite, cationic exchangeability and unique
Oligomeric or high poly- iron carbonyl cation is inserted into concave convex rod soil layer interchain by ion-exchange by layer chain structure feature, will be recessed
The layer of convex stick soil is strutted with layer, is sloughed after being inserted into the moisture in the column-supporting agent of interlayer, and surface hydroxyl increases, and increases interlamellar spacing
Afterwards, hydroxyl can reinforce coordination, fixed heavy metal ion with heavy metal ion such as cadmium arsenic.Attapulgite increases after pillared
The elecrtonegativity of surface potential, facilitates Adsorption of Cadmium.Obtained from the iron complexes of formation strut attapulgite interlayer
Mesh composite material with rock-steady structure, can effective fixed arsenic cadmium ion, prevent the secondary release of arsenic cadmium ion.
Secondly, attapulgite by iron carbonyl it is pillared after, after expanding aperture, improve the porosity and specific surface of material
Product, improves the mass-transfer efficiency that heavy metal ion enters duct, helps to adsorb heavy metal ion.Simultaneously for arsenic element, arsenic
Biological effectiveness depend on its valence state and form, by electronics transfer promote arsenic in soil oxidation and absorption fix, reduce it
Validity.Through the attapulgite that iron carbonyl is pillared, playing pillared iron complexes is mainly Fe (OOH)X, it is easy to arsenic-adsorbing
Arsenic can be adsorbed and be fixed, arsenic element is promoted to generate ferric arsenate (FeAsO by acid ion4·H2) or scorodite (FeAsO O4·
2H2) etc. O low solubilities mineral sequestration reduces the migration of the available state of arsenic in the interlayer spacings of the pillared attapulgite of iron carbonyl.
After arsenic-adsorbing, iron carbonyl is pillared more firm and enhances, and the interlamellar spacing further expansion of attapulgite, attapulgite compare table
Area and porosity increase again, and modified pillared attapulgite absorption property further enhances.And calcium, magnesium etc. in formula from
Son has the function of auxiliary into mine, obstructs crops and absorbs arsenic in soil；Secondly, containing a large amount of calcium ions and magnesium ions, calcium in formula
Magnesium ion easily forms competitive Adsorption with cadmium ion, facilitates absorption of the crop reduction to cadmium, while calcium and magnesium is the required member of crop
Element, the calcium ions and magnesium ions in formula can be sustained in agricultural land soil, and sustainable release calcium ions and magnesium ions improve farmland fertility, be continued
Crop is acted on；Third has fertilizer synergistic, improvement soil, stimulation plant growth containing humic acid in formula and improves agricultural production
The functions such as quality；In addition, humic acid also has preferable suction-operated to cadmium, effective cadmium in soil can effectively reduce；4th,
Appropriate in formula to joined siliceous fertilizer, siliceous fertilizer has important trophism to crop, is conducive to the photosynthesis for improving crop, increases
Object is pretended to the resistivity of pest and disease damage, improves the lodging tolerance of crop, effectively prevents the root rot of crop, there is improvement crop
The effect of quality, each position silicon concentration of crop overground part increase, therefore silicon promotes crop overground part in the Energy Deposition of crop overground part
Cadmium concentration is reduced.
It compared with prior art, can provided by the present invention for the soil conditioner in reparation cadmium arsenic combined pollution farmland
The effective migration for inhibiting cadmium and arsenic in agricultural land soil simultaneously is based on carrying out cadmium and arsenic in terms of agricultural land soil and crops two blunt
Change.And raw material is mostly natural minerals composition, and inexpensive, materials are easy, are conducive to industrial production.The soil conditioner of production contains
There are calcium, magnesium, siliceous fertilizer etc., effective activation simultaneously supplements soil because being acidified the nutrients such as fixed calcium, phosphorus, potassium, in use may be used
To achieve the effect that balance fertilizing.This soil conditioner production method is simple, it is easy, with the prospect being widely popularized.
Specific embodiment
Below in conjunction with specific embodiment, the present invention is further described.
Embodiment 1
It is a kind of for repairing the soil conditioner in cadmium arsenic combined pollution farmland, including following raw material:
40 parts of calcium carbonate, 20 parts of magnesia, 10 parts of land plaster, 10 parts of humic acid, 10 parts of the pillared attapulgite of iron carbonyl, silicon
10 parts of sour sodium.
The pillared attapulgite of iron carbonyl the preparation method comprises the following steps:
1): according to molar ratio NaOH/FeCl2The NaOH solution of 0.5mol/L is slowly injected into constantly aeration and stirred by=2.1:1
The FeCl of the 0.5mol/L mixed2In solution, then, water is added to adjust solution ph to 6.5, color to peony, then in room temperature
Lower placement is for 24 hours to get the pillared liquid of iron carbonyl.
2): by attapulgite and water with the ratio mixing and ball milling of volume ratio 1:2, being modulated into attapulgite slurry, will prepare
The good pillared liquid of iron carbonyl is slowly added in attapulgite slurry, controls molysite/attapulgite=5mmol/g in pillared liquid, and 40
After reacting 5h under DEG C water-bath 150r/min stirring condition, room temperature is aged for 24 hours, then is washed to no Cl-(use AgNO3Detection), Zhi Hou
It dries 4 hours, sieves with 100 mesh sieve after grinding to get the pillared attapulgite of iron carbonyl is arrived at 105 DEG C.
It is a kind of for repairing the preparation method of the soil conditioner in cadmium arsenic combined pollution farmland: take 40 parts of calcium carbonate, oxidation
20 parts of magnesium, 10 parts of land plaster, 10 parts of humic acid, 10 parts of the pillared attapulgite of iron carbonyl, 10 parts of sodium metasilicate, by above-mentioned raw materials through mixed
Material machine be uniformly mixed to get.
Embodiment 2
It is a kind of for repairing the soil conditioner in cadmium arsenic combined pollution farmland, including following raw material:
40 parts of land plaster, 20 parts of magnesia, 10 parts of conch meal, 15 parts of sodium metasilicate, 10 parts of humic acid, the pillared bumps of iron carbonyl
15 parts of stick soil；
The pillared attapulgite of iron carbonyl the preparation method comprises the following steps:
1): according to molar ratio Ca (OH)2/FeCl2=0.7:1, by the Ca (OH) of 0.02mol/L2Solution, which is slowly injected into, to expose
The FeCl of 0.3mol/L under gaseity2In solution, then, water is added to adjust solution ph to 8.6, color to peony, then,
It places at room temperature for 24 hours to get the pillared liquid of iron carbonyl.
2): by attapulgite and water with the ratio mixing and ball milling of volume ratio 1:2, being modulated into attapulgite slurry, will prepare
The good pillared liquid of iron carbonyl is slowly added in the attapulgite slurry of stirring with peristaltic pump, controls molysite/concave convex rod in pillared liquid
Soil=10mmol/g, after then reacting 3h under 70 DEG C of water-bath 200r/min stirring conditions, room temperature is aged for 24 hours, then is washed to no Cl-
(use AgNO3Detection), it dries 4 hours, sieves with 100 mesh sieve after grinding to get the pillared attapulgite of iron carbonyl is arrived at 105 DEG C later.
It is a kind of for repairing the preparation method of the soil conditioner in cadmium arsenic combined pollution farmland: take 40 parts of land plaster, oxidation
20 parts of magnesium, 10 parts of conch meal, 15 parts of sodium metasilicate, 10 parts of humic acid, 15 parts of the pillared attapulgite of iron carbonyl, by above-mentioned raw materials through mixed
Material machine is uniformly mixed.
Embodiment 3
It is a kind of for repairing the soil conditioner in cadmium arsenic combined pollution farmland, including following raw material:
40 parts of calcium carbonate, 25 parts of magnesia, 15 parts of disiloxane, 10 parts of humic acid, 10 parts of the pillared attapulgite of iron carbonyl.
The pillared attapulgite of iron carbonyl the preparation method comprises the following steps:
1): according to molar ratio Ca (OH)2/FeSO4=0.55:1, by the Ca (OH) of 0.02mol/L2Solution is slowly injected into not
The FeSO of the 1.0mol/L of disconnected aeration stirring4In solution, then, water is added to adjust solution ph to 6.5, color to peony, so
It places at room temperature afterwards for 24 hours to get the pillared liquid of iron carbonyl.(due to generating calcium sulfate in the process, calcium sulfate slightly soluble has wrapped up hydrogen
Calcium oxide prevents reaction further progress, therefore has an impact to pH).
2): by attapulgite and water with the ratio mixing and ball milling of volume ratio 1:2, being modulated into attapulgite slurry, will prepare
The good pillared liquid of iron carbonyl is slowly added in the attapulgite slurry of stirring with peristaltic pump, controls molysite/concave convex rod in pillared liquid
Soil=15mmol/g, after reacting 4h under 60 DEG C of water-bath 250r/min stirring conditions, room temperature is aged for 24 hours, then is washed to no SO4 2-It (uses
BaCl2Detection), it is dried 6 hours at 80 DEG C later, 120 meshes is crossed after grinding to get the pillared attapulgite of iron carbonyl is arrived.
It is a kind of for repairing the preparation method of the soil conditioner in cadmium arsenic combined pollution farmland:
40 parts of calcium carbonate, 25 parts of magnesia, 15 parts of disiloxane, 10 parts of humic acid, 10 parts of the pillared attapulgite of iron carbonyl.
Above-mentioned raw materials are uniformly mixed through batch mixer.
Embodiment 4
It is a kind of for repairing the soil conditioner in cadmium arsenic combined pollution farmland, including following raw material: Paris white
25 parts, 20 parts of calcium oxide, 15 parts of magnesia, 5 parts of magnesia, 10 parts of waterglass, 5 parts of humic acid, 10 parts of red mud, iron carbonyl it is pillared
15 parts of attapulgite.
The pillared attapulgite of embodiment iron carbonyl is the same as embodiment 3.
It is a kind of for repairing the preparation method of the soil conditioner in cadmium arsenic combined pollution farmland:
It is 25 parts of Paris white, 20 parts of calcium oxide, 15 parts of magnesia, 5 parts of magnesia, 10 parts of waterglass, 5 parts of humic acid, red
15 parts of the pillared attapulgite of 10 parts of mud, iron carbonyl, above-mentioned raw materials are uniformly mixed through batch mixer.
Embodiment 5
It is a kind of for repairing the soil conditioner in cadmium arsenic combined pollution farmland, including following raw material: take calcium carbonate
30 parts, 20 parts of land plaster, 5 parts of magnesia, 15 parts of magnesia, 10 parts of humic acid, 10 parts of the pillared attapulgite of iron carbonyl, red mud 10
Part.
The pillared attapulgite of embodiment iron carbonyl is the same as embodiment 3.
It is a kind of for repairing the preparation method of the soil conditioner in cadmium arsenic combined pollution farmland:
Take 30 parts of calcium carbonate, 20 parts of land plaster, 5 parts of magnesia, 15 parts of magnesia, 10 parts of humic acid, iron carbonyl pillared recessed
Convex stick native 10 parts, 10 parts of red mud, above-mentioned raw materials are uniformly mixed through batch mixer.
Embodiment 6
It is a kind of for repairing the soil conditioner in cadmium arsenic combined pollution farmland, including following raw material: calcium carbonate 30
Part, 15 parts of conch meal, 5 parts of gypsum, 5 parts of humic acid, 20 parts of magnesia, 10 parts of red mud, 10 parts of polysiloxanes, iron carbonyl are pillared recessed
Convex 15 parts of stick soil.
The pillared attapulgite of embodiment iron carbonyl is the same as embodiment 1.
It is a kind of for repairing the preparation method of the soil conditioner in cadmium arsenic combined pollution farmland:
Take 30 parts of calcium carbonate, 15 parts of conch meal, 5 parts of gypsum, 5 parts of humic acid, 20 parts of magnesia, 10 parts of red mud, poly- silicon oxygen
15 parts of the pillared attapulgite of 10 parts of alkane, iron carbonyl, above-mentioned raw materials are uniformly mixed through batch mixer.
Effect test
1, test site: the Jiangxi Province town Pingxiang City Shang Bu
2, experimental field soil basic condition: topography is flat, and fertility is uniform, and irrigation condition is good, the basic physicochemical character of soil
Are as follows:
Cadmium and total arsenic concentration can satisfy " agricultural irrigation water quality standard " (GB 5084-2005) standard requirements in irrigation water；
3, test period: on September 25th, 28 days 1 May in 2018
4, experimental design:
2 processing of test setting, are respectively as follows:
Processing 1: control, conventional fertilizer application；
Processing 2: conventional fertilizer application+respectively applies the soil conditioner of Examples 1 to 6.
Conventional fertilizer application is to be accustomed to by the dose and fertilising of local farmers, applies compound fertilizer (N-P per acre2O5-K2O:15-15-
9) 50Kg, base manure apply 35 kgs/acre of compound fertilizer, 15 kgs/acre of top dressing compound fertilizer.Every plot area 30m2Each processing repeats 3
It is secondary, take random district's groups to arrange.
1. fertilizing management: in addition to the difference of experimental design, fertilising is according to local habitual dose and fertilization mode.
2. insect pest preventing and controlling management: each test field management is accustomed to cultural method using local rice, by testing carrier
Special messenger is arranged uniformly to carry out liquid manure and pest management.Each cell, in addition to the difference of experimental design, other insect pest preventing and controlling measures
It is consistent, it is ensured that all each breeding time normal growth and developments of experimental plot rice.All are disabled after the comprehensive medication of pregnant heading
Pesticide.
3. water management: in addition to the difference of experimental design, being irrigated by habitual, i.e. shallow water tiller reaches seedling in tillering regularity
When drain dry field, water , Yun Miho and heading flowering period keep shoaling layer before water loses before and after booting, rear that field is kept to moisten to receipts
It cuts.
5, for testing kind: middle rice varieties, C two excellent 651.
6, test method: the processing of application 1-6 of embodiment of the present invention soil conditioner is applied May by 300Kg/ mus on the 28th
With, 7 days before rice transplanting, by soil conditioner spreading to upper soll layer to be processed, then according to turn over agitating mode will be to
Processing soil turns over stirring 2 times together with the conditioner of spreading thereon, and overturning depth is 20cm.It harvests within rice September 25 days, measurement is each
Cadmium and arsenic content see below Tables 1 and 2 in Brown Rice on processing soil, and cadmium and arsenic content see the table below 3 and table 4 in soil.
Cadmium content in 1 effect experiment of table
Arsenic content in 2 effect experiment of table
Cadmium content in 3 effect experiment of table
Arsenic content in 4 effect experiment of table
The above is only a preferred embodiment of the present invention, it is not intended to limit the present invention in any form.It should
It points out, for those skilled in the art, without departing from the principle of the present invention, if can also make
Dry improvements and modifications, these modifications and embellishments should also be considered as the scope of protection of the present invention.
Claims (10)
1. a kind of for repairing the soil conditioner in cadmium arsenic combined pollution farmland, which is characterized in that the soil conditioner includes
Following raw material:
40-50 parts of calcareous fertilisers, 20-30 parts of fertiliser containing magnesium, 10-20 parts of siliceous fertilizer, 5-10 parts of humic acid and the pillared attapulgite of iron carbonyl
5-20 parts.
2. soil conditioner according to claim 1, which is characterized in that the preparation of the pillared attapulgite of the iron carbonyl
Method are as follows:
1) attapulgite is mixed with water according to volume ratio 1:2, ball milling obtains attapulgite slurry；
2) the pillared liquid of iron carbonyl is added in attapulgite slurry, after reaction, is aged, washing, then dry, grinds to get hydroxyl
Iron prop supports attapulgite.
3. soil conditioner according to claim 2, which is characterized in that the preparation of the pillared liquid of iron carbonyl described in step 2)
Method are as follows: under the conditions of aeration stirring, ferrous salt solution pH value is adjusted to 6~9, then places ageing for 24 hours at room temperature, i.e.,
Obtain the pillared liquid of iron carbonyl.
4. soil conditioner according to claim 3, which is characterized in that it is described ferrous salt solution pH value is adjusted to 6~
9, it is directed to ferrous salt solution and NaOH or Ca (OH) is added2After solution, add water that pH value is adjusted to 6~9；Or to ferrous salt solution
NaOH or Ca (OH) is added2PH value is adjusted to 6~9 after solution.
5. soil conditioner according to claim 3 or 4, which is characterized in that when the pillared liquid of iron carbonyl being added in step 2),
Control molysite/attapulgite=5~15mmol/g in pillared liquid.
6. soil conditioner according to claim 2, which is characterized in that reacted described in step 2, refer to that speed of agitator is
It is reacted 3~6 hours under the conditions of 150~250r/min, reaction temperature is 40~70 DEG C.
7. soil conditioner according to claim 2, which is characterized in that ageing described in step 2) is that room temperature is aged, old
Change the time be 8~for 24 hours.
8. soil conditioner according to claim 2, which is characterized in that drying temperature described in step 2) is 80~120
DEG C, drying time is 3~6h.
9. soil conditioner according to claim 1, which is characterized in that calcareous fertilisers, fertiliser containing magnesium and the siliceous fertilizer, granularity are
100-200 mesh.
10. a kind of claim 1-9 is described in any item for repairing the preparation of the soil conditioner in cadmium arsenic combined pollution farmland
Method, which is characterized in that the preparation method is that:
According to formula, each raw material is uniformly mixed through batch mixer, the soil for repairing cadmium arsenic combined pollution farmland can be obtained
Conditioner.
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Cited By (7)
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| CN110373201A (en) * | 2019-09-04 | 2019-10-25 | 天津水泥工业设计研究院有限公司 | A kind of fast long-acting soil conditioner and preparation method thereof for repairing farmland cadmium pollution |
| CN112931094A (en) * | 2021-02-01 | 2021-06-11 | 郑州轻工业大学 | Method for efficiently preventing and controlling cadmium pollution of wheat-corn crop rotation system |
| CN112997656A (en) * | 2021-03-08 | 2021-06-22 | 茂施农业科技有限公司 | Method for efficiently reducing standard exceeding of cadmium in rice by utilizing slow-release calcium |
| CN113088291A (en) * | 2021-04-07 | 2021-07-09 | 湖南省农业环境生态研究所 | Soil conditioner for effectively reducing cadmium and arsenic accumulation of rice and preparation method and application thereof |
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| CN114621599A (en) * | 2022-03-17 | 2022-06-14 | 中南大学 | Nano ferrihydrite-spent grain composite colloidal material and preparation and application thereof |
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| CN110373201A (en) * | 2019-09-04 | 2019-10-25 | 天津水泥工业设计研究院有限公司 | A kind of fast long-acting soil conditioner and preparation method thereof for repairing farmland cadmium pollution |
| CN112931094A (en) * | 2021-02-01 | 2021-06-11 | 郑州轻工业大学 | Method for efficiently preventing and controlling cadmium pollution of wheat-corn crop rotation system |
| CN112997656A (en) * | 2021-03-08 | 2021-06-22 | 茂施农业科技有限公司 | Method for efficiently reducing standard exceeding of cadmium in rice by utilizing slow-release calcium |
| CN113088291A (en) * | 2021-04-07 | 2021-07-09 | 湖南省农业环境生态研究所 | Soil conditioner for effectively reducing cadmium and arsenic accumulation of rice and preparation method and application thereof |
| CN114031461A (en) * | 2021-10-26 | 2022-02-11 | 中冶南方都市环保工程技术股份有限公司 | Organic silicon fertilizer for reducing chromium and arsenic content in rice and preparation method and application thereof |
| CN114621599A (en) * | 2022-03-17 | 2022-06-14 | 中南大学 | Nano ferrihydrite-spent grain composite colloidal material and preparation and application thereof |
| CN114621599B (en) * | 2022-03-17 | 2023-03-10 | 中南大学 | Nano ferrihydrite-spent grain composite colloidal material and preparation and application thereof |
| CN114713623A (en) * | 2022-03-23 | 2022-07-08 | 华中农业大学 | Method for improving arsenic and cadmium enrichment capacity of ciliate desert-grass by combining phytic acid and phosphorus fertilizer reinforcement |
| CN114713623B (en) * | 2022-03-23 | 2024-02-27 | 华中农业大学 | Method for improving arsenic and cadmium enrichment capacity of ciliate desert-grass by using phytic acid reinforced combined phosphate fertilizer |
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