CN106734161B - A kind of APP combined remediation method for heavy metal pollution reparation of ploughing - Google Patents
A kind of APP combined remediation method for heavy metal pollution reparation of ploughing Download PDFInfo
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- CN106734161B CN106734161B CN201611197929.3A CN201611197929A CN106734161B CN 106734161 B CN106734161 B CN 106734161B CN 201611197929 A CN201611197929 A CN 201611197929A CN 106734161 B CN106734161 B CN 106734161B
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- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 15
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- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 23
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Classifications
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The present invention relates to heavy metal pollution of soil to repair field, specifically discloses a kind of APP combined remediation method for heavy metal pollution reparation of ploughing.The APP combined remediation method combines chemical technology, engineering technology, forms that one kind can operate, propagable soil conditioner (Amendment)-pH value adjust (pH)-ploughs deeply the APP combined remediation method of cultivated (Plough).The combined remediation method provide it is a kind of using natural mineral raw, repair efficient, cost economy, and under the premise of the soil conditioner product of secondary pollution will not be caused to environment, do not change the attribute of arable land plantation crops, the heavy metal being passivated in stable soil inhibits, hinders absorption of the crops to heavy metal, reduces enrichment of the crops to heavy metal, the moderate-elements such as calcium, silicon are provided for plant growth simultaneously, realize crop production safety.
Description
Technical field
The present invention relates to arable land heavy metal pollutions to repair field, specifically discloses a kind of for heavy metal pollution reparation of ploughing
APP combined remediation method, including application soil conditioner, apply acidity-basicity regulator and plough deeply cultivated three measures, mention simultaneously
Natural mineral raw is used for a kind of, repairs efficient, cost economy, and the soil conditioner of secondary pollution will not be caused to environment
Product.
Background technique
Currently, heavy metal pollution of soil becomes the great environmental problem faced outside Now Domestic.In heavy metal especially with mercury,
Cadmium, lead, arsenic, chromium are commonly referred to as " five poisonous creatures: scorpion, viper, centipede, house lizard, toad element " to human health risk maximum.Base of the arable soil as production estimation
Plinth, heavy metal with mining, sewage irrigation, fertilising, enter arable soil, arable soil deterioration using agrochemical.According to
Statistics, China are had reached 20,000,000 hectares by the cultivated area of heavy metal pollution, the 1/6 of Zhan Quanguo cultivated area, be often only because
Heavy metal pollution of soil and the grain of the underproduction are just up to more than 1,000 ten thousand tons, other contaminated by heavy metals grain every year also up to 1200
Ten thousand tons, add up at least 20,000,000,000 yuan of economic loss, and increasing trend is also presented.It is most of after heavy metal enters soil
It is detained in the soil with various forms, while heavy metal is absorbed by crops, is accumulated in crop edible part and is entered food
Chain circulation, to constitute a threat to human health.China human mortality is numerous, and the crops that safety is gone out in the arable land on kind of pollution are to work as
Preceding agricultural environment field significant problem in the urgent need to address.
Soil restoring technology spininess is to mining soil and place soil at present, mainly by Soil leaching, soil moved in improve the original, soil removal and replacement,
The methods of electro reclamation, plant absorption remove the heavy metal in soil, and big using these engineering amounts, the time is long, costly.
The restorative procedure of arable land heavy metal pollution is mainly the soil end for passing through transformation soil-plant system, reduces heavy metal in soil
Validity and dilution heavy metal in soil concentration reduce absorption of the crops to heavy metal, with individual event recovery technique or with plant
The combined remediation technology that object reparation combines is more, but there is also cumbersome, remediation efficiency is low, expense for these recovery techniques
The problems such as high, time length, influence crop planting.
" heavy metal contaminated soil conditioner and plant and chemistry combined remediation method ", ZL200910193692.5, invention
By adding a kind of pH of soil additive adjusting soil into heavy metal pollution mine soil, it is passivated heavy metal-polluted soil；Then
Between make and crop rotation plantation energy-source plant and super tired plant Sedum alfredii Hance, to absorb the heavy metal in soil.But the invention is only
Overtesting is done in mining area, in arable land, how unknown effect is, meanwhile, by the way of hyperaccumulative plant absorption, do not meet cultivated
The attribute of ground agricultural product production.
" the Phytochemistry combined remediation technology of heavy metal Mn, Pb, Cr, Zn contaminated soil ", ZL200910198915.7, In
Trade route is sowed in heavy-metal contaminated soil, while pouring chelating agent solution, is discharged fixed heavy metal ion, is promoted the suction in trade route
It receives, but when chelate solution concentration is adjusted to 500-1000mg/kg, also needs after continuously planting trade route 2-3, soil can just carry out agriculture
Make, take a long time, and after not illustrating in invention and pouring chelating agent, trade route needs checking to the absorbability of heavy metal, repairing effect
Study carefully.
CN 1788868A invention changes the migratory activity of metal ion by regulation soil pH, while utilizing fixative
Physical and chemical performance captures free metal ion from soil.Since the invention is only with (NH4)2HPO4It is mixed with straw ash
Alkalization obtains fixative after conjunction, and relatively poor to soil acidity or alkalinity ability of regulation and control, the object being capable of fixing is also fewer, predominantly
The heavy metals such as cadmium, lead, copper, and due to main component (NH4)2HPO4Though it is plant nutrient substance, once usage amount is improper,
The loss of phosphorus will be caused, be easy to cause the secondary pollutions such as water eutrophication.
" a kind of organic environment-friendly soil conditioner for improveing acidification or acid soil ", ZL201110154187.7 is used
The raw materials such as biogas residue, conch meal, calcium magnesium phosphate, plant ash, chitosan, zeolite powder, bentonite, by high-temperature calcination, high-temperature fusion,
Water quenching, drying and the complex steps such as levigate are made, but are found by testing in apple arboretum, Chinese cabbage and peanut garden, and pH value only increases
Add 0.07-0.24 unit, does not illustrate the effect to heavy metal pollution reparation.
Presently, there are technical disadvantages include:
One, arable land production estimation attribute is affected.Combined remediation technology mostly uses plant-animal reparation, plant at present
Perhaps the chemical combined reparation of plant-is activated in soil object-microorganism using soil animal, microorganism or chemical agent
Then heavy metal is carrying out absorption removal to heavy metal with heavy metal super-enriched plant.Arable land plantation heavy metal super-enriched plant
Afterwards, crops cannot be planted again or be made between can only being carried out super enriching plant, and make crops be mostly used energy-source plant rather than
Edible crops, and super enriching plant is limited to the enrichment degree of heavy metal, needs to recycle plantation harvesting, required for reparation
Time is long, influences or be directly changed arable land agricultural product to produce this functional attributes, does not meet actual production demand.
Two, soil moved in improve the original, soil removal and replacement are taken, the engineering measures such as surface soil is gone to shift contaminated soil, is backfilled using clean soil, it is this
Reclamation activities project amount is big, and rehabilitation expense is high.
Three, arable soil structure and ingredient are destroyed.When using technologies such as Soil leachings, made by chelating, activating etc.
With being separated after heavy metal in soil being transferred to liquid phase, but while separating beavy metal, other nutrient elements in soil
And organic matter can also be separated simultaneously, cause the structure of soil to be destroyed, microbiologic population withers and falls, nutrient loss, cannot
It is re-used as arable soil use.
Summary of the invention
Top priority of the invention is to provide a kind of APP combined remediation method for heavy metal pollution reparation of ploughing,
Under the attribute for not changing arable land plantation crops, the heavy metal being passivated in stable soil inhibits, hinders crops to heavy metal
Absorption, reduce enrichment of the crops to heavy metal, while providing the moderate-elements such as calcium, silicon, realization agricultural product for plant growth
Safety in production.
Another task of the invention is to provide a kind of arable land heavy metal pollution rehabilitating soil conditioner, repair efficiently, at
This economy, and secondary pollution will not be caused to environment.
Realize that the object of the invention is adopted the technical scheme that:
APP combined remediation method includes application soil conditioner, applies acidity-basicity regulator and plough deeply cultivated three measures,
Specifically executing step includes:
(1) it ploughs deeply cultivated: sowing or transplant in crop and plough deeply within preceding 10 days or so cultivated, ploughed depth is 20-30 ㎝, with not
Destruction plough sole is principle.
(2) soil conditioner and acidity-basicity regulator are applied: ploughing deeply and applies soil conditioner and acidity-basicity regulator after ploughing
Rotary tillage rake is even, and readjustment of field plot is smooth, and watering to ground moistening, curing can be sowed or be transplanted for 7 days or so, base manure of ploughing
It can be administered simultaneously.
The amount of application of the soil conditioner is thousand grams/acre of 150-200.
The amount of application of the acidity-basicity regulator is thousand grams/acre of 70-150.
The acidity regulator is quick lime (CaO), white lime (Ca (OH)2), caustic soda (NaOH), soda ash (Na2CO3), it is small
Soda (NaHCO3), one or more of vulcanized sodium and sodium phosphate.
The soil conditioner, is prepared from the following materials:
Rich calcium material is one or more of lime stone, quick lime and white lime；
Silica-rich material is one or more of wollastonite, sodium metasilicate, potassium silicate and siliceous fertilizer；
Adsorbent material is one or more of zeolite, sepiolite, bentonite, hydroxyapatite and medical stone.
The soil conditioner technical indicator made are as follows:
Mass fraction >=30% of effective calcium (in terms of CaO), soluble silicon is (with SiO2Meter) mass fraction >=5.5%,
PH=11-13, fineness (passing through the testing sieve of 0.5 ㎜ of aperture) >=90%, moisture (H2O mass fraction≤5.0%)；
The making step of the soil conditioner:
A, when rich calcium material contains lime stone, physical mixed will be carried out with other raw materials again after limestone calcination；
When rich calcium material not containing limestone serous, rich calcium material, silica-rich material and adsorbent material are directly subjected to physical mixed；
B, mixture obtained by step A enters the particle that granule-forming machine is fractured into 2-4 centimetres of equivalent diameter；
C, these particles are then transported to drying oven by conveyer belt and carry out hot-air blowing drying；
D, dry finish is milled (500 μm of partial size or less) into grinder, and sieving, intransitable return to continues to grind
Mill, sieving finish agitation depth again and are uniformly dispersed；
E, the indexs such as real-time detection fineness, moisture after cooling, are packaged after qualified, are then sent to warehouse, sampling inspection
It can dispatch from the factory after qualification.
Compared with prior art, the advantages of the present invention are as follows:
(1) Multiple techniques combine, and realize effective reparation to heavy-metal contaminated soil.The present invention is by chemical technology, work
Journey technology, which combines, using soil conditioner (Amendment)-pH value adjust (pH)-ploughs deeply the APP connection of cultivated (Plough)
Restorative procedure is closed, this method is under the attribute for not changing arable land plantation crops, the heavy metal being passivated in stable soil, inhibit,
Absorption of the crops to heavy metal is hindered, reduces enrichment of the crops to heavy metal, while providing in calcium, silicon etc. for plant growth
Secondary element realizes crop production safety.
Arable land plough deeply cultivated before crop sowing, the high Enriching soil of heavy coating metals is turned over and buries bottom, bottom weight
The low Enriching soil renovation of metal is to surface layer, for needed for plant growth, reducing top soil Cadmium Pollution in Soils degree, to subtract
Few absorption of the crop to cadmium.
Soil pH value is improved by application acidity-basicity regulator, the heavy metal ion such as cadmium, lead are under a certain concentration, in environment
PH value is higher, slightly solubility precipitating more easily generated, while increasing conditioner and soil surface variable charge soil, and enhancing absorption makes gold
The transportable property row and biological effectiveness for belonging to ion reduce, and achieve the effect that heavy metal-passivated；
The effects of soil conditioner is by surface complexing, ion exchange, micro-porous adsorption reduces heavy metals mobilization and biology
Validity.Effective silicon can excite the activity of antioxidase, alleviate the murder by poisoning of heavy metal on plants physiological metabolism.
(2) process is simple, does not influence normally to plough and produce.The present invention uses chemistry-engineering combined remediation method, broadcasts
Kind or transplanting before plough deeply cultivated, agree with farming and turn over demand, spread fertilizer over the fields soil conditioner and acidity-basicity regulator harrows even curing,
It can apply while carry out with farming base manure, all measures will not generate extra work burden to peasant.Meanwhile reclamation activities is all
It is carried out before crop seeding is transplanted, curing can be sowed for seven days, and the time of infertility is not required to take other measures, not influence agriculture of ploughing
This attribute of crop production.
(3) soil conditioner provided in invention, using natural minerals as raw material, crushing is directly applied after milling, and makes work
Skill is simple, and abundant raw material easily obtains, at low cost.Soil parent material of the mineral as soil development, it is right there is no destruction soil texture
Soil environment causes the risk of secondary pollution.
(4) conditioner peomotes crop growth rich in moderate-elements such as calcium, silicon needed for plant growth, improves
Diseases and insect pests resistance.It is rich in porous mineral materials in conditioner, not only micro-porous adsorption can be carried out to heavy metal ion, reduce soil
Heavy metal activity in earth, while soil texture can be improved, enhance the retain water and nutrients ability of soil.
Detailed description of the invention
Fig. 1: the variation of middle serious pollution rice field soil pH after different disposal.
Fig. 2: middle serious pollution rice field soil exchange state Cd changes of contents after different disposal.
Fig. 3: middle serious pollution rice field soil exchange state Pb changes of contents after different disposal.
Fig. 4: middle serious pollution rice field Cd changes of contents in brown rice after different disposal.
Fig. 5: middle serious pollution rice field Pb changes of contents in brown rice after different disposal.
Fig. 6: the variation of slight pollution rice field rice yield after different disposal.
Fig. 7: the variation of slight pollution rice field pH after different disposal.
Fig. 8: slight pollution rice field soil exchange state Cd changes of contents after different disposal.
Fig. 9: slight pollution rice field Cd changes of contents in brown rice after different disposal.
Figure 10: the preparation route figure of APP combined remediation method flow chart and soil conditioner of the invention.
Specific embodiment
Applicant will in conjunction with specific embodiments be described in detail application of the invention below, so as to the skill of this field
Art personnel are further understood the present invention, but following embodiment is not construed in any way to the scope of the present invention
Limitation.
All % are mass percentage in following embodiment.The active calcium ion content (in terms of CaO) and stone of quick lime
The active calcium ion content (in terms of CaO) of product is 90% or more after lime stone calcining, and wollastonite available silicon content is (with SiO2Meter) be
20% or more, the modulus of sodium metasilicate is 2, and potassium silicate modulus is 1.8, and the available silicon content of siliceous fertilizer is (with SiO2Meter) be 20% with
On.
In following embodiment, the test method of soil conditioner and soil pH is the rule by NY/T 1377-2007 standard
Fixed to execute, digestion agent is water, pedotheque solution to be measured specific the preparation method comprises the following steps:
10.0g pedotheque to be measured is weighed, is placed in the beaker in tall form of 50mL, and 25mL water is added.After beaker is sealed,
5min is acutely vibrated with vibrating machine, is then allowed to stand 2h.
Embodiment 1: the preparation of soil conditioner
Selected raw material carries out physical mixed according to the proportion weighing of table 1, is broken into 2-4 centimetres of equivalent diameter through crusher
Size particles are transported to drying oven by conveyer belt and carry out 280 DEG C of hot-air blowings dryings, and dry finish is milled into vertical mill
Afterwards, powder is sieved, and the vertical mill that returns to that diameier is greater than 0.5mm and cannot be sieved continues to grind, and sieving finishes stirs again
Dynamic depth is uniformly dispersed, and real-time detection after cooling is packaged after qualified, obtains soil conditioner sample S1.
Embodiment 2: the preparation of soil conditioner
Lime stone is weighed according to the proportion in table 1 with other raw material and is carried out after 900 DEG C of -1200 DEG C of calcinings are cooling
Physical mixed is broken into 2-4 centimetres of size particles of equivalent diameter through crusher, is transported to drying oven by conveyer belt and carries out 280
DEG C hot-air blowing is dry, dry to finish into after vertical mill milling, and powder sieving, diameier is greater than what 0.5mm cannot be sieved
It returns to vertical mill to continue to grind, sieving finishes agitation depth again and is uniformly dispersed, and real-time detection after cooling carries out after qualified
Encapsulation, obtains soil conditioner sample S2.
Embodiment 3: the preparation of soil conditioner
Selected raw material weighs according to the proportion of embodiment 3 in table, prepares as described in Example 1, obtain soil conditioner sample
Product S3.
1 soil conditioner composition of raw materials table of table
The performance indicator of the soil conditioner sample S1-S3 of 2 embodiment 1-3 of table preparation
| S1 | S2 | S3 | |
| CaO (%) | 33.2 | 31.8 | 32.4 |
| SiO2(%) | 5.6 | 5.9 | 5.8 |
| pH | 11.7 | 12.4 | 12.6 |
| Fineness (passing through 0.5 ㎜ testing sieve) (%) | 98.6 | 99.2 | 97.7 |
| Moisture (%) | 2.1 | 2.4 | 1.8 |
Embodiment 4: middle serious pollution rice field APP combined remediation method plot experiment
Select serious pollution rice field in Chenzhou City Suxian District one that the product is used to carry out field plot July in March, 2015-
24 cells are arranged in test, testing site, and every 8 cells are one group.Cell size is 4 × 5m (20m2), with high 30cm, width 30cm
Ridge separate, apply agricultural film on ridge, cell it is single it is single fill, prevent from going here and there mutually water.Testing site soil is that granite is developed
Rice soil, for examination soil physico-chemical property be shown in Table 3.Test is Hunan morning Xian with early-paddy brown rice, is purchased from the limited public affairs of Hunan Jin Yuan kind industry
Department.Test sets A, P1, P2, AP1, AP2, P1P2, APP seven processing and CK mono- control, and A is the soil for spreading fertilizer over the fields the preparation of embodiment 1
200kg/ mus of earth conditioner, P1 is to spread fertilizer over the fields 150kg/ mus of acidity-basicity regulator quick lime, and P2 is to plough deeply cultivated 27cm, and guarantee does not destroy
Plough sole, each processing set 3 repetitions, random district's groups arrangement.Depth was carried out to P2, AP2, P1P2, APP cell in 28 March
It turns over, April 5 has spread fertilizer over the fields soil conditioner to A, AP1 cell respectively, and P1, P1P2 cell have spread fertilizer over the fields pH value conditioner,
P1P2, APP cell will spread fertilizer over the fields soil conditioner and pH value conditioner, after the above cell spreads fertilizer over the fields measure and CK cell
It is even that Rotary tillage rake is carried out together, cell is arranged smooth.April 15 transplanted rice seedling, between the time of infertility of rice,
The moisture condition of each cell, fertility level, pesticide application level are consistent.When rice maturation, five-spot is taken respectively respectively
A cell soil and rice sample, adopted pedotheque are divided air-dried after taking back, stir break the removal impurity such as rhizome into pieces with one's fingers in the process,
It is ground after air-drying with agate mortar, crosses 100 mesh nylon mesh, it is stand-by after being marked with sample sack pack.Rice sample is placed in baking oven
80 DEG C are dried to weight.With small-sized stainless steel rice mill decladding, brown rice is obtained, is crushed, 100 mesh nylon mesh are crossed, it is packed with sample
It is stand-by after bag label.
Table 3 is for trying soil physico-chemical property
The influence of 1 pair of soil pH
The variation of soil pH is as shown in Figure 1, as can be seen from Figure 1 after different disposal: execute A, P1, AP1, AP2,
The measures such as P1P2, APP, soil aciditiy are adjusted, and pH improves 0.02-0.81 unit, reach 4.82-5.61；Execute APP
PH improves 0.81 unit when joint reclamation activities, reaches 5.61, not only contributes to heavy metal and generates deposit, reduces weight
The transportable property and biological effectiveness of metal, reduce the absorption of crop, while more tending to rice and being most suitable for pH value section 5.50-
6.50, be conducive to the growth of rice.
The influence of 2 pairs of soil exchange state heavy metals
Soil exchange state Cd, Pb changes of contents difference is as shown in Figure 2 and Figure 3 after different disposal, can from figure
Out: compared with CK, the treatment measures that A, P1, P2, AP1, AP2, P1P2, APP are different are taken, it can conspicuousness reduction heavy metal-polluted soil
Cd, Pb exchange state content, reduction amount is respectively in 13.03%-63.83%, 14%-56%, when taking APP joint measure to handle
When, heavy metal-polluted soil Cd, Pb exchange state content reduces 63.83%, 56% respectively, and the transportable of heavy metal greatly reduces
Property and biological effectiveness.There is also significant differences between other treatment measures.
The influence of content of beary metal in 3 pairs of brown rice
Cd, Pb changes of contents difference are as shown in Figure 4, Figure 5 in brown rice after different disposal, as can be seen from the figure: with
CK control is compared, and executing A, P1, P2, AP1, AP2, P1P2, APP different measure can effectively reduce content of beary metal in brown rice,
Wherein the content of cadmium can reduce 12.3%-76.4% in brown rice, and the content of lead can reduce 12.6%-69.1%.Join when executing APP
When closing reclamation activities, cadmium, lead content reduced rate drop to 0.16mgkg up to 76.4%, 69.1% respectively in brown rice-1、
0.39mg·kg-1, in " eight kinds of members such as lead, cadmium, chromium, mercury, selenium, arsenic, copper, zinc in grain (contain cereal, beans, potato) and product
Element limitation " within critical field, meet Crop securify production requirement.
In general, APP combined remediation method is executed, soil acidity or alkalinity can be effectively improved, reduce arable land heavy metal biological
Content of beary metal in validity and brown rice reaches the reparation purpose in heavy metal pollution arable land.
Embodiment 5: slight pollution rice field APP combined remediation method plot experiment
Changsha County crossing town slight pollution rice field is selected to carry out field plot trial with the product July in March, 2015-,
24 cells are arranged in testing site, and every 8 cells are one group.Cell size is 4 × 5m (20m2), with the field of high 30cm, width 30cm
The ridge separates, and applies agricultural film on ridge, cell it is single it is single fill, prevent from going here and there mutually water.Testing site soil is water made of granite development
Rice soil, the full cadmium content of soil are 0.82mgkg-1, more than 1.73 times of standard of soil environment quality second level, soil exchange state cadmium contains
Amount is 0.52mgkg-1, pH value 5.4.Early-paddy brown rice is Hunan morning Xian, is purchased from Hunan Jin Yuan Zhong Ye Co., Ltd.Test set A,
P1, P2, AP1, AP2, P1P2, APP seven processing and CK mono- control, A are the soil conditioner for spreading fertilizer over the fields the preparation of embodiment 2
150kg/ mus, P1 is 100kg/ mus of acidity-basicity regulator for spreading fertilizer over the fields sodium bicarbonate and white lime according to 20%:80% quality proportioning, P2
To plough deeply cultivated 23cm, guarantee does not destroy plough sole, and each processing sets 3 repetitions, random district's groups arrangement.In March 28 to P2,
AP2, P1P2, APP cell plough deeply cultivated, and April 2 has spread fertilizer over the fields soil conditioner to A, AP1 cell respectively, and P1, P1P2 are small
PH value conditioner has been spread fertilizer over the fields in area, and P1P2, APP cell will spread fertilizer over the fields soil conditioner and pH value conditioner, and the above cell is spread
After applying measure and CK cell to carry out Rotary tillage rake together even, cell is arranged smooth.April 10 moved rice seedling
It plants, between the time of infertility of rice, the moisture condition of each cell, fertility level, pesticide application level are consistent.Rice at
When ripe, five-spot takes each cell soil and rice sample respectively, and each cell singles singly receive, and poidometer produces.Adopted soil
Sample is divided air-dried after taking back, stir break the removal impurity such as rhizome into pieces with one's fingers in the process, ground after air-drying with agate mortar, cross 100 mesh
Nylon mesh, it is stand-by after being marked with sample sack pack.Rice sample is placed in baking oven and is dried to weight for 80 DEG C.It is ground with small-sized stainless steel
Rice machine decladding, obtains brown rice, crushes, and crosses 100 mesh nylon mesh, stand-by after being marked with sample sack pack.
The influence of 1 pair of rice yield
The variation of rice yield is as shown in fig. 6, as can be seen from Figure 6 after different disposal: seven kinds for the treatment of measures have six
Kind of measure has an effect of increasing production to rice yield, and average growth rate 0.44%-5.31%, P1 measure makes rice be averaged the underproduction
0.07%, but impact effect is little.By variance analysis it is found that influence of A, AP1, AP2, APP processing to yield is compareed with CK
There are significant differences between group, and P1, P2, P1P2 handle the influence to yield and there is no conspicuousness is poor between CK control group
It is different.Meanwhile that there are conspicuousnesses between measure in addition to A is poor by APP joint measure influence of the processing to rice yield and other several
It is different, increasing production of rice 5.31%.Illustrate, soil conditioner and arable land heavy metal pollution APP combined remediation method have crop yield
There is certain facilitation, but the facilitation of AAP is bigger.
The influence of 2 pairs of soil pH values
The soil pH variation after different disposal is as shown in fig. 7, from figure 7 it can be seen that execute different disposal measure, soil
PH increases 0.01-0.31 unit, achievees the purpose that reduce heavy metal activity, meanwhile, ensure rice optimum growh pH.
The influence of 3 pairs of soil exchange state cadmium contents
The variation of soil exchange state cadmium content is as shown in figure 8, as can be seen from Figure 8 after different disposal: comparison CK control
Group, execute other seven measures can be effectively reduced heavy metal in soil activity or concentration, measures averagely reduce degree
For 9.04%-59.61%, after executing APP combined remediation method, soil exchange state cadmium content average value is from 0.52mgkg-1Drop
As low as 0.21mgkg-1, reduced rate reaches 59.61%, by variance analysis it is found that soil is handed in APP joint measure processing
Change between the influence of state cadmium content and other several measures that there are significant differences.APP combined remediation method can significantly reduce soil
Earth heavy metal exchange state cadmium content or concentration.
The influence of cadmium content in 4 pairs of brown rice
After different disposal in brown rice Cd changes of contents as shown in figure 9, as can be seen from Figure 9: CK control group output
In paddy, the cadmium content of brown rice is 0.34mgkg-1, than specified in " national food safety standard " GB2762-2012
0.2mg·kg-1It is higher by 41.18%, is handled by measures, average cadmium content reduces 10.32%-66.32% in brown rice,
When implementing the processing of APP combined remediation method, average cadmium content is 0.115mgkg in brown rice-1, relative comparison group reduces
66.18%, it is far below state food threshold limit values standard.By variance analysis it is found that measures can effectively reduce brown rice
The content of middle heavy metal, and implement APP joint reclamation activities compared with other measures, there are conspicuousnesses for cadmium content in brown rice
Difference.Test proves that APP combined remediation method can significantly reduce cadmium content in brown rice, reaches arable land heavy metal pollution and repairs mesh
's.
Claims (1)
1. a kind of APP combined remediation method for heavy metal pollution reparation of ploughing, it is characterised in that the following steps are included:
(1) plough deeply cultivated: crop sow or transplant before carry out within 8-12 days ploughing deeply it is cultivated, ploughed depth be 20-30 ㎝, not destroy plough
Bottom is principle；
(2) soil conditioner and acidity-basicity regulator are applied: ploughing deeply and applies soil conditioner and acidity-basicity regulator rotary tillage after ploughing
Harrow even, readjustment of field plot is smooth, and to ground moistening, curing is sowed or transplanted after 6-8 days for watering, and base manure of ploughing is applied simultaneously
With；
The soil conditioner, is prepared from the following materials:
Rich calcium material 35-45wt%
Silica-rich material 20-40wt%
Adsorbent material 15-37wt%
Rich calcium material is one or more of lime stone, quick lime and white lime；
Silica-rich material is one or more of wollastonite, sodium metasilicate, potassium silicate and siliceous fertilizer；
Adsorbent material is one or more of zeolite, sepiolite, bentonite, hydroxyapatite and medical stone；
The soil conditioner technical indicator prepared are as follows: mass fraction >=30% of effective calcium in terms of CaO, with SiO2That counts is solvable
Property silicon mass fraction >=5.5%, pH=11-13, fineness in terms of the ratio by the testing sieve of 0.5 ㎜ of aperture >=90%, moisture
Mass fraction≤5.0%；
The making step of the soil conditioner:
A, when rich calcium material contains lime stone, physical mixed will be carried out with other raw materials again after limestone calcination；
When rich calcium material not containing limestone serous, rich calcium material, silica-rich material and adsorbent material are directly subjected to physical mixed；
B, mixture obtained by step A is broken into 2-4 centimetres of equivalent diameter of particle；
C, particle delivery obtained by step B to drying oven is subjected to hot-air blowing drying；
D, drying finishes, and is milled into grinder, and sieving, intransitable returns continue to grind, be sieved finish stir again with
It is uniformly dispersed；
E, the technical indicator of the soil conditioner is detected after cooling, all up to the soil conditioner after qualification；
The acidity-basicity regulator be one of quick lime, white lime, caustic soda, soda ash, sodium bicarbonate, vulcanized sodium and sodium phosphate or
It is two or more；
The amount of application of the soil conditioner is thousand grams/acre of 150-200；
The amount of application of the acidity-basicity regulator is thousand grams/acre of 70-150.
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| CN107892917A (en) * | 2017-10-30 | 2018-04-10 | 湖南新九方科技有限公司 | A kind of heavy metal pollution arable soil conditioner, preparation and its application |
| CN108640743A (en) * | 2018-05-22 | 2018-10-12 | 广州草木蕃环境科技有限公司 | The passivation adjusting control agent and its preparation and application in repairing heavy metal pollution arable land |
| CN108821843A (en) * | 2018-05-22 | 2018-11-16 | 广州草木蕃环境科技有限公司 | Conditioner and its preparation and application for the Farmland contamination reparation of mining area periphery |
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| CN111269722B (en) * | 2020-03-02 | 2021-04-13 | 中南林业科技大学 | Slow-release type repairing agent for treating cadmium-arsenic composite polluted paddy soil and preparation method thereof |
| CN112474789A (en) * | 2020-10-14 | 2021-03-12 | 广西师范大学 | Method for promoting growth of anthurium andraeanum under heavy metal stress |
| CN113004091B (en) * | 2021-02-26 | 2022-07-12 | 西北农林科技大学 | Compound fertilizer passivator for alkaline soil and preparation method and application thereof |
| CN113248333A (en) * | 2021-05-31 | 2021-08-13 | 河南中米生态科技有限公司 | Granular soil conditioner for composite heavy metal pollution and preparation method thereof |
| CN113785745A (en) * | 2021-10-12 | 2021-12-14 | 中国热带农业科学院环境与植物保护研究所 | High-quality rice planting method for high-background geological areas in south |
| CN114409445A (en) * | 2021-12-30 | 2022-04-29 | 春华秋实科技集团有限公司 | Composite microbial soil remediation agent and preparation method thereof |
| CN114769307A (en) * | 2022-04-22 | 2022-07-22 | 江西有色地质矿产勘查开发院 | Soil remediation agent for reducing cadmium concentration in cultivated land and using method and application thereof |
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