CN106631479A - Functional fertilizer for reducing chromium pollution of soil - Google Patents
Functional fertilizer for reducing chromium pollution of soil Download PDFInfo
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- CN106631479A CN106631479A CN201611230458.1A CN201611230458A CN106631479A CN 106631479 A CN106631479 A CN 106631479A CN 201611230458 A CN201611230458 A CN 201611230458A CN 106631479 A CN106631479 A CN 106631479A
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- soil
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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
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B15/00—Organic phosphatic fertilisers
-
- 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
Abstract
The invention relates to the technical field of fertilizers, in particular to a functional fertilizer for reducing chromium pollution of soil. The functional fertilizer is prepared from, by weight, 25-30 parts of urea, 25-30 parts of urea phosphate, 10-15 parts of sodium nitrate, 25-30 parts of potassium chloride, 10-15 parts of sodium sulfate, 12-16 parts of attapulgite, 10-15 parts of sodium alginate, 8-13 parts of humus soil, 5-9 parts of oxalic acid, 15-20 parts of iron extracting solution, 10-15 parts of modified ferrous sulfate and 20-25 parts of modified corn cod. The fertilizer is rich in nutrition and contains a variety of elements and trace nutrient elements essential for crops and a variety of nutrition elements, the total nitrogen, phosphorus and potassium nutrients are 62.3% or above, the conversion rate from an effective state to an ineffective state serves as an evaluation index for soil restoration, the soil chromium metal conversion rate is 91.4% or above, corn is taken as an example, the yield can be increased by 9.1-10.3%, and the dual benefits of high yield and heavy metal soil restoration are achieved.
Description
Technical field
The present invention relates to technical field of fertilizers, and in particular to a kind of multi-Functional Fertilizers of the pollution of chromium for slowing down soil.
Background technology
With economic fast development and the progress of industrial technology, the harmful effect of work, agricultural production to environment constantly adds
Play, because solid waste is constantly stacked and toppled over to soil surface, harmful waste water constantly permeates in soil, harmful in air
Gas and floating dust are also constantly dropped in soil with rainwater, result in soil pollution, not only reduce the yield and matter of crops
Measure, also the health of indirect hazard.Wherein, heavy metal chromium is used as a kind of industrial raw materials, in its long-term production and application
In, soil environment can be affected, the chromium in soil mainly in the form of trivalent and sexavalence, trivalent chromium toxicity
Relatively low 90% trivalent chromium is attached in soil constitution in the form of hydroxide, is difficult migration, and Cr VI toxicity is relatively
Greatly, and with higher activity, it is more easy to be migrated in soil and its pore water, therefore the stabilization processes of chromium-polluted soil
It is critical only that by hexavalent chrome reduction be trivalent chromium. research shows that ferrous, sulfide and some organic complexs can be effective
In being applied to chromic process, however, the chromium of various forms can be converted mutually under certain condition in soil, especially in oxygen
When pH is 6.5～8.5 under the conditions of change, trivalent chromium can be partially converted into Cr VI, therefore, in the reparation of chromium-polluted soil,
Can Cr VI be stable in soil, and keeps not separating out under long-term natural conditions, be the focus of current research.
Since starting to apply chemical fertilizer from crop, wherein containing the nutrients such as abundant N, P, K, such as urea phosphate, urea phosphorus
Sour urea, nitric acid urea phosphate, urea phosphate potassium etc., to crop yield effect is significant, but due to the discharge of pollution sources, the evil of environment
Change so that heavy metal content in soil is exceeded, and the pollution to soil is increasingly serious, greatly reduce absorption profit of the crop to fertilizer
With, the utilization rate of fertilizer is reduced, meanwhile, there is great edible safety in the crop planted under heavy metal pollution, because
This, in efficient, quick development instantly, research and development are a kind of nutritious, both comprising the necessary nutriment of plant growth outside, moreover it is possible to
The fertilizer of effective reparation is carried out to heavy metal-polluted soil, is the trend of current agricultural development, can plant out healthy, safe
Crop, while, moreover it is possible to soil is carried out excellent modified, reduces pollution, realize the double benefit of high yield and removing heavy metals,
Jing becomes the emphasis of the research of current planting industry and fertilizer trade, for this purpose, the present inventor is provided with rich for chromium-polluted soil
The multi-functional fertilizer of chromium content is produced, reduced, is reparation and the weight of soil pollution with high economic implications and social effect
The process field of metal provides a kind of effective way.
The content of the invention
The present invention is solution above-mentioned technical problem, there is provided a kind of multi-Functional Fertilizers of the pollution of chromium for slowing down soil.
Realize particular by technical scheme below：
A kind of multi-Functional Fertilizers of the pollution of chromium for slowing down soil, are made up of following raw material by weight：Urea 25～
30th, urea phosphate 25～30, sodium nitrate 10～15, potassium chloride 25～30, sodium sulphate 10～15, attapulgite 12～16, alginic acid
Sodium 10～15, fertile soil 8～13, oxalic acid 5～9, iron extract 15～20, modified ferrous sulfate 10～15, modified corn core 20
～25.
Preferably, it is made up of following raw material by weight：Urea 28, urea phosphate 28, sodium nitrate 13, potassium chloride 28,
It is sodium sulphate 13, attapulgite 14, sodium alginate 13, fertile soil 11, oxalic acid 7, iron extract 18, modified ferrous sulfate 13, modified
Corncob 23.
Further, described iron extract, is to mix black fungus and green moss by 1: 1.5～2 mass ratio, smash 10 to pieces～
12min, adds 80～85% 13～14h of alcohol steep, decompression recycling ethanol to add petroleum ether, extract 6～8h, reclaim
Petroleum ether, filters, and takes filtrate, add 2.5～3mol/L NaOH adjust pH value be stand 15 at 9～11,5～7 DEG C～
20min, adds the 4～5% of filtrate quality zeolite powder, and 1～1.5h, turning in 800～900r/min are stirred at 60～70 DEG C
Speed 15～20min of lower centrifugation, takes supernatant, and it is 2～3 to add citric acid to adjust pH value, filters to take filtrate, you can.
Further, described modified ferrous sulfate, preparation method, be by ferrous sulfate and tartaric acid by 1: 2～3 quality
Than mixing, 13～15h is soaked at 15～20 DEG C, is filtered, filter residue is heated into 85～90 DEG C, add filter residue quality 40～
50% gallic acid, mixes thoroughly, cooling, crushes.
Further, the preparation process of whole modified ferrous sulfate, is to carry out under vacuum, pressure value is 0.12～
0.15MPa。
Further, described modified corn core, preparation method is comprised the following steps：
(1) collect corncob, it is 6～8% to dry to water content, crushes 80～100 mesh sieves, add concentration be 65～
70% ethanol, addition is 1.5～2 times of corncob quality, and magnetic stirring apparatus stirs 25～30min, mistake at 50～55 DEG C
Filter, dries to obtain corncob micro mist；
(2) corncob micro mist and starch are mixed by 1: 0.12～0.15 mass ratio, add water stirring, 200～
Ultrasonically treated 10min under the frequency of 250KHz, is centrifuged 25～30min under the rotating speed of 500～600r/min, filter to take precipitation, with
The oxalic acid solution of 1.2～1.3mol/L is mixed by 1: 1.5～2 mass ratio, at 80 DEG C of constant temperature, magnetic stirrer 40～
18min is centrifuged under the rotating speed of 45min, 550r/min, is filtered, obtain final product modified corn core.
Further, the multi-Functional Fertilizers of the described pollution of chromium for slowing down soil, preparation method is to weigh raw material by formula,
Ultrasonically treated 25～30min under the frequency of 40～50KHz, then raw material is tiled on the vibrating, with the frequency of 60～70 times/min
Rate vibrates 15～20min, is put into comminutor and is granulated.
In sum, the beneficial effects of the present invention is：This Fertilizer nutrient is enriched, containing various a large amount of units necessary to crop
Element and micronutrient element, nitrogen, phosphorus, potassium total nutrient >=62.3%, rich in various nutrient elements, meanwhile, by iron extract, change
Property ferrous sulfate, the addition of modified corn core, the present invention can effectively reduce the activity of metal ion in soil, change heavy metal and exist
Form in soil, from available state soil is changed into by the heavy metal in soil and/or crop is difficult to the invalid state that absorbs, is reduced and is made
The absorption of thing heavy metal, so as to reach repairing heavy metal in soil pollution, reduces the purpose of crop in-vivo heavy metal content, by six
Valence state chromium ion is reduced to three valence state chromium ions, further forms Cr (OH)3Precipitation or FexCr1-x(OH)3Precipitation, solidification chromium unit
Element, it is to avoid the oxidation of three valence state chromium, reduces the enrichment of hexavalent state chromium, is repaiied as soil with the number turnover that available state is changed into invalid state
Multiple judging quota, the present invention reaches more than 91.4% to the conversion ratio of soil Cr metal, the fertilizer of the present invention not only heavy metal
Repairing effect significantly, also with abundant nutrition, effectively facilitates the growth of crop, and by taking corn as an example, per mu yield is relative to control
Group, can increase production 9.1～10.3%, and the chromium content in corn has reached required standard of the country to corn chromium content ,≤
The standard of 1.0mg/kg, it is ensured that the edible safety of corn, realizes the double benefit of high yield and repairing heavy metal in soil.
Wherein, by iron extract, the addition of be modified ferrous sulfate, modified corn core, the reproducibility of fertilizer is strengthened, effectively
The chromium that the chromium of hexavalent state is reduced into three valence states, and easily formed precipitation solidification, meanwhile, by the addition of iron extract, energy
Form antagonism to reduce exchangeable species of the chromium in soil with Cr VI, suppress absorption of the plant to chromium, by chromium in crop
Content is preferably minimized, in addition, be modified to corncob with oxalic acid and starch, effectively activation corn wicking surface and heavy metal chromium
The active function groups of ion complexation, improve pore structure, increase the specific surface area of corn wicking surface, increase the number of active function groups
Amount, effectively lifts the adsorption capacity of corncob, reduces the content of the available state chromium in soil.
Specific embodiment
The specific embodiment of the present invention is described in further detail below, but the invention is not limited in these realities
Mode is applied, any improvement or replacement on the present embodiment essence spirit still falls within the claims in the present invention required for protection
Scope.
Embodiment 1
A kind of multi-Functional Fertilizers of the pollution of chromium for slowing down soil, are made up of following raw material by weight：Urea 25kg,
Urea phosphate 25kg, sodium nitrate 10kg, potassium chloride 25kg, sodium sulphate 10kg, attapulgite 12kg, sodium alginate 10kg, fertile soil
8kg, oxalic acid 5kg, iron extract 15kg, modified ferrous sulfate 10kg, modified corn core 20kg.
Described iron extract, is to mix black fungus and green moss by 1: 1.5 mass ratio, smashs 10min to pieces, adds 80%
Alcohol steep 13h, decompression recycling ethanol adds petroleum ether, extracts 6h, reclaims petroleum ether, filters, and takes filtrate, adds
The NaOH of 2.5mol/L adjusts pH value to stand 15min at 9,5 DEG C, the 4% of filtrate quality zeolite powder is added, at 60 DEG C
Stirring 1h, under the rotating speed of 800r/min 15min is centrifuged, and takes supernatant, and it is 2 to add citric acid to adjust pH value, filters to take filtrate,
.
Described modified ferrous sulfate, preparation method is to mix ferrous sulfate and tartaric acid by 1: 2 mass ratio,
13h is soaked at 15 DEG C, is filtered, filter residue is heated into 85 DEG C, add the 40% of filter residue quality gallic acid, mixed thoroughly, cooled down, powder
It is broken.
The preparation process of whole modified ferrous sulfate, is to carry out under vacuum, and pressure value is 0.12MPa.
Described modified corn core, preparation method is comprised the following steps：
(1) corncob is collected, it is 6% to dry to water content, crushed 80 mesh sieves, addition concentration is 65% ethanol, is added
Amount is 1.5 times of corncob quality, and magnetic stirring apparatus stirs 25min at 50 DEG C, is filtered, and dries to obtain corncob micro mist；
(2) corncob micro mist and starch are mixed by 1: 0.12 mass ratio, add water stirring, surpasses under the frequency of 200KHz
25min is centrifuged under the rotating speed of sonication 10min, 500r/min, precipitation is filtered to take, with the oxalic acid solution of 1.2mol/L 1: 1.5 is pressed
Mass ratio mixing, at 80 DEG C of constant temperature, 40～45min of magnetic stirrer is centrifuged 18min, mistake under the rotating speed of 550r/min
Filter, obtains final product modified corn core.
The multi-Functional Fertilizers of the described pollution of chromium for slowing down soil, preparation method is to weigh raw material by formula, 40KHz's
Ultrasonically treated 25min under frequency, then raw material is tiled on the vibrating, 15min is vibrated with the frequency of 60 times/min, it is put into granulation
Machine is granulated.
Embodiment 2
A kind of multi-Functional Fertilizers of the pollution of chromium for slowing down soil, are made up of following raw material by weight：Urea 30kg,
Urea phosphate 30kg, sodium nitrate 15kg, potassium chloride 30kg, sodium sulphate 15kg, attapulgite 16kg, sodium alginate 15kg, fertile soil
13kg, oxalic acid 9kg, iron extract 20kg, modified ferrous sulfate 15kg, modified corn core 25kg.
Described iron extract, is to mix black fungus and green moss by 1: 2 mass ratio, smashs 12min to pieces, adds 85%
Alcohol steep 14h, decompression recycling ethanol adds petroleum ether, extracts 8h, reclaims petroleum ether, filters, and takes filtrate, adds 3mol/
The NaOH of L adjusts pH value to stand 20min at 11,7 DEG C, adds the 5% of filtrate quality zeolite powder, stirs at 70 DEG C
1.5h, under the rotating speed of 900r/min 20min is centrifuged, and takes supernatant, and it is 3 to add citric acid to adjust pH value, filters to take filtrate, i.e.,
Can.
Described modified ferrous sulfate, preparation method is to mix ferrous sulfate and tartaric acid by 1: 3 mass ratio,
15h is soaked at 20 DEG C, is filtered, filter residue is heated into 90 DEG C, add the 50% of filter residue quality gallic acid, mixed thoroughly, cooled down, powder
It is broken.
The preparation process of whole modified ferrous sulfate, is to carry out under vacuum, and pressure value is 0.15MPa.
Described modified corn core, preparation method is comprised the following steps：
(1) corncob is collected, it is 8% to dry to water content, crushed 100 mesh sieves, addition concentration is 70% ethanol, is added
Amount is 2 times of corncob quality, and magnetic stirring apparatus stirs 30min at 55 DEG C, is filtered, and dries to obtain corncob micro mist；
(2) corncob micro mist and starch are mixed by 1: 0.15 mass ratio, add water stirring, surpasses under the frequency of 250KHz
30min is centrifuged under the rotating speed of sonication 10min, 600r/min, precipitation is filtered to take, with the oxalic acid solution of 1.3mol/L 1: 2 is pressed
Mass ratio mixes, and at 80 DEG C of constant temperature, magnetic stirrer 45min is centrifuged 18min under the rotating speed of 550r/min, filters, and obtains final product
Modified corn core.
The multi-Functional Fertilizers of the described pollution of chromium for slowing down soil, preparation method is to weigh raw material by formula, 50KHz's
Ultrasonically treated 30min under frequency, then raw material is tiled on the vibrating, 20min is vibrated with the frequency of 70 times/min, it is put into granulation
Machine is granulated.
Embodiment 3
A kind of multi-Functional Fertilizers of the pollution of chromium for slowing down soil, are made up of following raw material by weight：Urea 28kg,
Urea phosphate 28kg, sodium nitrate 13kg, potassium chloride 28kg, sodium sulphate 13kg, attapulgite 14kg, sodium alginate 13kg, fertile soil
11kg, oxalic acid 7kg, iron extract 18kg, modified ferrous sulfate 13kg, modified corn core 23kg.
Described iron extract, is to mix black fungus and green moss by 1: 1.8 mass ratio, smashs 11min to pieces, adds 83%
Alcohol steep 13.5h, decompression recycling ethanol adds petroleum ether, extracts 7h, reclaims petroleum ether, filters, and takes filtrate, adds
It is to stand 18min at 10,6 DEG C that the NaOH of 2.8mol/L adjusts pH value, adds the 4.5% of filtrate quality zeolite powder, 65
1.3h is stirred at DEG C, 18min is centrifuged under the rotating speed of 850r/min, take supernatant, it is 2.5 to add citric acid to adjust pH value, mistake
Leaching filtrate, you can.
Described modified ferrous sulfate, preparation method is to mix ferrous sulfate and tartaric acid by 1: 2.5 mass ratio,
14h is soaked at 18 DEG C, is filtered, filter residue is heated into 88 DEG C, add the 45% of filter residue quality gallic acid, mixed thoroughly, cooled down,
Crush.
The preparation process of whole modified ferrous sulfate, is to carry out under vacuum, and pressure value is 0.13MPa.
Described modified corn core, preparation method is comprised the following steps：
(1) corncob is collected, it is 7% to dry to water content, crushed 90 mesh sieves, addition concentration is 68% ethanol, is added
Amount is 1.8 times of corncob quality, and magnetic stirring apparatus stirs 28min at 53 DEG C, is filtered, and dries to obtain corncob micro mist；
(2) corncob micro mist and starch are mixed by 1: 0.13 mass ratio, add water stirring, surpasses under the frequency of 230KHz
28min is centrifuged under the rotating speed of sonication 10min, 550r/min, precipitation is filtered to take, with the oxalic acid solution of 1.25mol/L 1: 1.8 is pressed
Mass ratio mixing, at 80 DEG C of constant temperature, magnetic stirrer 43min is centrifuged 18min under the rotating speed of 550r/min, filter, i.e.,
Obtain modified corn core.
The multi-Functional Fertilizers of the described pollution of chromium for slowing down soil, preparation method is to weigh raw material by formula, 45KHz's
Ultrasonically treated 28min under frequency, then raw material is tiled on the vibrating, 18min is vibrated with the frequency of 65 times/min, it is put into granulation
Machine is granulated.
Embodiment 4
A kind of multi-Functional Fertilizers of the pollution of chromium for slowing down soil, are made up of following raw material by weight：Urea 25kg,
Urea phosphate 25kg, sodium nitrate 15kg, potassium chloride 30kg, sodium sulphate 10kg, attapulgite 12kg, sodium alginate 15kg, fertile soil
13kg, oxalic acid 5kg, iron extract 15kg, modified ferrous sulfate 15kg, modified corn core 20kg.
Described iron extract, is to mix black fungus and green moss by 1: 2 mass ratio, smashs 12min to pieces, adds 80%
Alcohol steep 13h, decompression recycling ethanol adds petroleum ether, extracts 6h, reclaims petroleum ether, filters, and takes filtrate, adds
The NaOH of 2.5mol/L adjusts pH value to stand 20min at 9,7 DEG C, the 5% of filtrate quality zeolite powder is added, at 70 DEG C
Stirring 1h, under the rotating speed of 800r/min 20min is centrifuged, and takes supernatant, and it is 2 to add citric acid to adjust pH value, filters to take filtrate,
.
Described modified ferrous sulfate, preparation method is to mix ferrous sulfate and tartaric acid by 1: 2 mass ratio,
13h is soaked at 20 DEG C, is filtered, filter residue is heated into 90 DEG C, add the 50% of filter residue quality gallic acid, mixed thoroughly, cooled down, powder
It is broken.
The preparation process of whole modified ferrous sulfate, is to carry out under vacuum, and pressure value is 0.15MPa.
Described modified corn core, preparation method is comprised the following steps：
(1) corncob is collected, it is 8% to dry to water content, crushed 100 mesh sieves, addition concentration is 70% ethanol, is added
Amount is 1.5 times of corncob quality, and magnetic stirring apparatus stirs 25min at 50 DEG C, is filtered, and dries to obtain corncob micro mist；
(2) corncob micro mist and starch are mixed by 1: 0.12 mass ratio, add water stirring, surpasses under the frequency of 250KHz
30min is centrifuged under the rotating speed of sonication 10min, 500r/min, precipitation is filtered to take, with the oxalic acid solution of 1.2mol/L 1: 1.5 is pressed
Mass ratio mixing, at 80 DEG C of constant temperature, magnetic stirrer 40min is centrifuged 18min under the rotating speed of 550r/min, filter, i.e.,
Obtain modified corn core.
The multi-Functional Fertilizers of the described pollution of chromium for slowing down soil, preparation method is to weigh raw material by formula, 40KHz's
Ultrasonically treated 25min under frequency, then raw material is tiled on the vibrating, 20min is vibrated with the frequency of 70 times/min, it is put into granulation
Machine is granulated.
Embodiment 5
A kind of multi-Functional Fertilizers of the pollution of chromium for slowing down soil, are made up of following raw material by weight：Urea 25kg,
Urea phosphate 30kg, sodium nitrate 10kg, potassium chloride 30kg, sodium sulphate 10kg, attapulgite 16kg, sodium alginate 10kg, fertile soil
13kg, oxalic acid 5kg, iron extract 20kg, modified ferrous sulfate 15kg, modified corn core 25kg.
Described iron extract, is to mix black fungus and green moss by 1: 1.8 mass ratio, smashs 12min to pieces, adds 80%
Alcohol steep 14h, decompression recycling ethanol adds petroleum ether, extracts 6h, reclaims petroleum ether, filters, and takes filtrate, adds
The NaOH of 3mol/L adjusts pH value to stand 15min at 9,5 DEG C, adds the 5% of filtrate quality zeolite powder, stirs at 70 DEG C
1h is mixed, 20min is centrifuged under the rotating speed of 900r/min, take supernatant, it is 3 to add citric acid to adjust pH value, filters to take filtrate, i.e.,
Can.
Described modified ferrous sulfate, preparation method is to mix ferrous sulfate and tartaric acid by 1: 2 mass ratio,
13h is soaked at 20 DEG C, is filtered, filter residue is heated into 85 DEG C, add the 50% of filter residue quality gallic acid, mixed thoroughly, cooled down, powder
It is broken.
The preparation process of whole modified ferrous sulfate, is to carry out under vacuum, and pressure value is 0.12MPa.
Described modified corn core, preparation method is comprised the following steps：
(1) corncob is collected, it is 8% to dry to water content, crushed 100 mesh sieves, addition concentration is 65% ethanol, is added
Amount is 1.5 times of corncob quality, and magnetic stirring apparatus stirs 25min at 50 DEG C, is filtered, and dries to obtain corncob micro mist；
(2) corncob micro mist and starch are mixed by 1: 0.15 mass ratio, add water stirring, surpasses under the frequency of 200KHz
30min is centrifuged under the rotating speed of sonication 10min, 600r/min, precipitation is filtered to take, with the oxalic acid solution of 1.2mol/L 1: 2 is pressed
Mass ratio mixes, and at 80 DEG C of constant temperature, magnetic stirrer 40min is centrifuged 18min under the rotating speed of 550r/min, filters, and obtains final product
Modified corn core.
The multi-Functional Fertilizers of the described pollution of chromium for slowing down soil, preparation method is to weigh raw material by formula, 50KHz's
Ultrasonically treated 25min under frequency, then raw material is tiled on the vibrating, 15min is vibrated with the frequency of 60 times/min, it is put into granulation
Machine is granulated.
Experimental example
In order to further illustrate the using value of the present invention, inventor have chosen the corn trials field of 6 pieces of pollutions of chromium, wherein
One piece uses common fertilizer as a control group during maize planting, and another 5 pieces respectively using the fertilizer of the embodiment of the present invention 1～5
As experimental group, soil sampling is analyzed during plantation, counted with reference to corn yield, the content of 6-valence Cr ions on 6 pieces of ground is average
Value is in 965.3mg/kg, and the content of 6-valence Cr ions to the corn of 6 pieces of real estates is measured, as a result as shown in table 1：
Table 1
Explanation：The present invention can effectively reduce the activity of metal ion in soil, change form of the heavy metal in soil, will
Heavy metal in soil is changed into soil from available state and/or crop is difficult to the invalid state that absorbs, reduces the suction of crop heavy metal
Receive, so as to reach repairing heavy metal in soil pollution, reduce the purpose of crop in-vivo heavy metal content, it is invalid to be changed into available state
The number turnover of state is the judging quota of soil remediation, and the present invention reaches more than 91.4% to the conversion ratio of soil Cr metal, this
Not only heavy metal repairing effect significantly, also with abundant nutrition, effectively facilitates the growth of crop to bright fertilizer, is with corn
Example, per mu yield can increase production 9.1～10.3% relative to control group, and the chromium content in corn has reached country and corn chromium is contained
The required standard of amount, the standard of≤1.0mg/kg, it is ensured that the edible safety of corn, realize high yield and a rehabilitating soil huge sum of money
The double benefit of category.
Claims (7)
1. a kind of multi-Functional Fertilizers of the pollution of chromium for slowing down soil, it is characterised in that be made up of following raw material by weight：
Urea 25～30, urea phosphate 25～30, sodium nitrate 10～15, potassium chloride 25～30, sodium sulphate 10～15, attapulgite 12～
16th, sodium alginate 10～15, fertile soil 8～13, oxalic acid 5～9, iron extract 15～20, modified ferrous sulfate 10～15, modified
Corncob 20～25.
2. slow down the multi-Functional Fertilizers of the pollution of chromium of soil as claimed in claim 1, it is characterised in that by it is following by weight
The raw material composition of meter：Urea 28, urea phosphate 28, sodium nitrate 13, potassium chloride 28, sodium sulphate 13, attapulgite 14, sodium alginate
13rd, fertile soil 11, oxalic acid 7, iron extract 18, modified ferrous sulfate 13, modified corn core 23.
3. the multi-Functional Fertilizers of the pollution of chromium of soil are slowed down as claimed in claim 1, it is characterised in that described iron is extracted
Liquid, is to mix black fungus and green moss by 1: 1.5～2 mass ratio, smashs 10～12min to pieces, adds 80～85% ethanol leaching
13～14h is carried, decompression recycling ethanol adds petroleum ether, extracts 6～8h, reclaims petroleum ether, filters, and takes filtrate, adds 2.5
It is 15～20min of standing at 9～11,5～7 DEG C that the NaOH of～3mol/L adjusts pH value, adds the 4～5% of filtrate quality
Zeolite powder, at 60～70 DEG C stir 1～1.5h, under the rotating speed of 800～900r/min be centrifuged 15～20min, take supernatant,
It is 2～3 to add citric acid to adjust pH value, filters to take filtrate, you can.
4. the multi-Functional Fertilizers of the pollution of chromium of soil are slowed down as claimed in claim 1, it is characterised in that described modified sulfuric acid
Ferrous iron, preparation method is to mix ferrous sulfate and tartaric acid by 1: 2～3 mass ratio, at 15～20 DEG C immersion 13～
15h, filters, and filter residue is heated into 85～90 DEG C, adds the 40～50% of filter residue quality gallic acid, mixes thoroughly, cools down, and crushes
.
5. the multi-Functional Fertilizers of the pollution of chromium of soil are slowed down as claimed in claim 4, it is characterised in that entirely modified sulfuric acid is sub-
The preparation process of iron, is to carry out under vacuum, and pressure value is 0.12～0.15MPa.
6. the multi-Functional Fertilizers of the pollution of chromium of soil are slowed down as claimed in claim 1, it is characterised in that described modified corn
Core, preparation method is comprised the following steps：
(1) corncob is collected, it is 6～8% to dry to water content, crushed 80～100 mesh sieves, addition concentration is 65～70% second
Alcohol, addition is 1.5～2 times of corncob quality, and magnetic stirring apparatus stirs 25～30min at 50～55 DEG C, is filtered, drying
Obtain corncob micro mist；
(2) corncob micro mist and starch are mixed by 1: 0.12～0.15 mass ratio, add water stirring, 200～250KHz's
Ultrasonically treated 10min under frequency, is centrifuged 25～30min under the rotating speed of 500～600r/min, filter to take precipitation, with 1.2～
The oxalic acid solution of 1.3mol/L is mixed by 1: 1.5～2 mass ratio, at 80 DEG C of constant temperature, 40～45min of magnetic stirrer,
18min is centrifuged under the rotating speed of 550r/min, is filtered, obtain final product modified corn core.
7. the multi-Functional Fertilizers of the pollution of chromium of soil are slowed down as claimed in claim 1, it is characterised in that preparation method is to press
Formula weighs raw material, ultrasonically treated 25～30min under the frequency of 40～50KHz, then raw material is tiled on the vibrating, with 60～
The frequency of 70 times/min vibrates 15～20min, is put into comminutor and is granulated.
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| CN110560474A (en) * | 2019-09-05 | 2019-12-13 | 王旭 | Method for removing total chromium pollutants in chromium-polluted soil by water removal |
| CN110683894A (en) * | 2019-10-10 | 2020-01-14 | 内蒙古阿尔格生命科学有限公司 | Active cell microalgae repairing liquid and preparation method thereof |
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| CN110560474A (en) * | 2019-09-05 | 2019-12-13 | 王旭 | Method for removing total chromium pollutants in chromium-polluted soil by water removal |
| CN110560474B (en) * | 2019-09-05 | 2021-05-14 | 王旭 | Method for removing total chromium pollutants in chromium-polluted soil by water removal |
| CN110683894A (en) * | 2019-10-10 | 2020-01-14 | 内蒙古阿尔格生命科学有限公司 | Active cell microalgae repairing liquid and preparation method thereof |
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Application publication date: 20170510 |