CN104877688A - Conditioner for repairing farmland soil polluted by heavy metals and preparation method - Google Patents
Conditioner for repairing farmland soil polluted by heavy metals and preparation method Download PDFInfo
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- CN104877688A CN104877688A CN201510263493.2A CN201510263493A CN104877688A CN 104877688 A CN104877688 A CN 104877688A CN 201510263493 A CN201510263493 A CN 201510263493A CN 104877688 A CN104877688 A CN 104877688A
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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
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
- C09K17/08—Aluminium compounds, e.g. aluminium hydroxide
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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
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2101/00—Agricultural use
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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
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2109/00—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE pH regulation
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- Life Sciences & Earth Sciences (AREA)
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- Soil Conditioners And Soil-Stabilizing Materials (AREA)
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Abstract
The invention belongs to the technical field of agricultural environment conservation and repair, and particularly discloses a conditioner for repairing farmland soil polluted by heavy metals and a preparation method. The processed raw materials such as quick lime, zeolite, sepiolite and calcium magnesium phosphate fertilizer are uniformly mixed proportionally, so as to obtain the conditioner. The conditioner provided by the invention is reasonable in formula, the method is feasible, the operation is simple, and the conditioner integrates the functions of repairing soil with heavy metal pollution, regulating and controlling the soil acidity and alkalinity, and the like, enables the effective state cadmium and lead in polluted farmland to be reduced by 22.4%-31.4% and 26.3%-43.5% respectively, enables the contents of cadmium and lead in rice to be reduced by 33.2%-38.9% and 29.4%-44.6% respectively, the pH of soil to be increased by 0.16-0.27 and the yield of rice to be improved by 3.6%-6.3%, and is applicable to various farmland soil seriously polluted by heavy metals and seriously acidified.
Description
Technical field
The present invention relates to agricultural environment child care and recovery technique field, be specifically related to a kind of amendment improveing heavy metal contamination agricultural land soil, also relate to a kind of preparation method of amendment of above-mentioned improvement heavy metal contamination agricultural land soil, described amendment is applicable to the various contaminated by heavy metals agricultural land soil serious with soil acidification simultaneously.
Background technology
Along with modern science and technology and economic fast development, the discharge of Industrial " three Waste ", sewage irrigation, agricultural sludge, agricultural chemicals and the unreasonable for a long time of chemical fertilizer are used, and cause farmland soil heavy metals to pollute, and become one by a difficult problem for extensive concern.Heavy metal in soil enters food chain by plant absorption, and then constitutes a serious threat to HUMAN HEALTH.According to the display of national Investigation of Soil Pollution publication, the total exceeding standard rate of China's soil is 16.1%, and wherein slightly, slightly, moderate and serious pollution point position ratio be respectively 11.2%, 2.3%, 1.5% and 1.1%.China's arable soil point position exceeding standard rate is 19.4%, and wherein slightly, slightly, moderate and serious pollution point position ratio be respectively 13.7%, 2.8%, 1.8% and 1.1%, and principal pollutant are the heavy metals such as cadmium, nickel, copper, lead.This badly influenced farmland quality, food safety and even the mankind healthy and social stable.
At present, the recovery technique of heavy-metal contaminated soil mainly comprises: (1) engineering reparation, and as soil moved in improve the original, soil removal and replacement and deep ploughing are digged, this method quantities is large, and investment cost is high, is not suitable for the improvement of pollution in wide area soil; (2) peripheral doses, as electro reclamation and electric heating reparation, to polluting the soil remediation successful heavy, area is little, but easily causing Soil structure to destroy and fertility decline, being unsuitable for the reparation of agricultural land soil; (3) biological restoration, as microorganism remediation and phytoremediation, wherein microorganism remediation technology is also confined to scientific research and laboratory level, application example is few, and the phytoremediation cycle is long, and affect farming work, therefore be difficult to big area use in farmland soil heavy metals is polluted; (4) chemical redemption, as chemical leaching, chemical passivation etc.Chemical passivation reparation is in soil, add physics, the chemical property that amendment changes soil, by the effect such as absorption, precipitation, ion-exchange, complexing of its heavy metal, changes the existence of heavy metal in soil, reduces its biological activity.Chemical passivation recovery technique is with low cost with it, reparation is quick, simple operation and other advantages comes into one's own, and is suitable for the reparation of big area heavy-metal contaminated soil.
The amendment of conventional chemical passivation recovery technique comprises basic material, phosphorated material, the mineral being rich in iron and manganese oxides and organic materials etc.But conventional amendment has respective limitation, as long-term application phosphorated material can make soil be strong basicity and bring out body eutrophication; The mineral being rich in iron and manganese oxides are relatively high due to cost, there is Fe, Mn simultaneously and poison risk to crop; Organic materials can reduce the validity of heavy metal when just applying soil, but decomposes along with organic mineralising, likely causes the heavy metal ion by adsorbing again to discharge.
Summary of the invention
For the deficiencies in the prior art, the object of the invention is to there are provided a kind of amendment improveing heavy metal contamination agricultural land soil.It is made up by a certain percentage of unslaked lime, fused(calcium magnesium)phosphate, zeolite, sepiolite four kinds of raw materials, and this amendment is by changing soil pH, increasing the approach reduction bioavailability of heavy metals such as adsorption by soil site, antagonism of ions.Various contaminated by heavy metals agricultural land soil can be widely used in, especially southern acid agricultural land soil.
Amendment of the present invention combines the advantage of various conventional amendment, is rich in multiple reparative factor, has quick and continual and steady remarkable repairing effect, and the raw material sources of amendment are extensive, and with low cost, environmental friendliness, non-secondary pollution, is easy to spread.
Another object of the present invention there are provided a kind of preparation method improveing the amendment of heavy metal contamination agricultural land soil, simple to operate, easy to implement the method.
In order to realize foregoing invention object, present invention employs following technical measures:
Improve an amendment for heavy metal contamination agricultural land soil, it is made up of four kinds of raw materials that weight percent is following:
Improve an amendment for heavy metal contamination agricultural land soil, it is made up (preferable range) of four kinds of raw materials that weight percent is following:
Improve an amendment for heavy metal contamination agricultural land soil, it is made up (preferred plan) of four kinds of raw materials that weight percent is following:
Described unslaked lime is the powder crossing 60-140 mesh sieve after the calcining of Wingdale raw ore being pulverized;
Described fused(calcium magnesium)phosphate is a kind of alkaline fertilizer containing phosphate radical, P
2o
5content>=12%;
Described zeolite is by rear for air-dry for the zeolite raw ore pulverizing powder crossing 60-140 mesh sieve;
Described sepiolite is by rear for air-dry for the sepiolite raw ore pulverizing powder crossing 60-140 mesh sieve;
Improve a preparation method for the amendment of heavy metal contamination agricultural land soil, it comprises the steps:
A. raw material unslaked lime preparation: select Wingdale raw ore, calcining crosses 60-140 mesh sieve after pulverizing, for subsequent use.
B. raw material zeolite preparation: select zeolite raw ore, air-dry pulverizing is rear crosses 60-140 mesh sieve, for subsequent use.
C. raw material sepiolite preparation: select sepiolite raw ore, air-dry pulverizing is rear crosses 60-140 mesh sieve, for subsequent use.
D. raw material steps A, B, C prepared and fused(calcium magnesium)phosphate mix in proportion, and obtain a kind of amendment improveing heavy metal contamination agricultural land soil of the present invention.
Compared with prior art, advantage of the present invention and beneficial effect are:
A. the principal character of the present invention adjustable soil pH that has been reasonable disposition, the raw material that increases adsorption by soil site, form ion antagonism, make product can reduce Study on Availability Control of Heavy Metals in Soil from multi-angle.Pilot plant test and Demonstration And Extension result show: after using this product, and the heavy metal content such as the cadmium in agricultural-food, lead all meet " national food safety standard ".
B. the present invention not only has the function of in-situ passivation soil metal, and the permeability that can also improve soil pH value greatly, promote soil aggregate formation, strengthen soil, have concurrently and repair acidified soil, improve soil tillage quality, improve the functions such as crop yield, being applicable to the soil that various soil parent material is grown, is a kind of broad spectrum type, multi-functional environmentfriendly products.
C. raw material sources of the present invention are extensive, and preparation method is simple, easy, easy to use, and popularizing application prospect is wide.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail; but be not the restriction to claims of the present invention request protection domain; the equivalent replacement of all any this areas done according to the disclosure of invention, all belongs to protection scope of the present invention.
In following examples 1-10, raw material unslaked lime is crossed 80 mesh sieves after pulverizing by the calcining of Wingdale raw ore and is prepared from, and this raw material unslaked lime is provided by Lime Factory of xiangtan, hunan province county, wherein mass percentage content >=80% of CaO, MgO≤5%, cadmium content≤5mg/kg.
In following examples 1-10, raw material zeolite is that the air-dry pulverizing of clinoptilolite raw ore rear mistake 80 mesh sieve is prepared from, and this raw material is provided by Ningxiang County ore powder factory of Hunan Province.It inhales ammonia amount mmol/100g>=100, H
2o≤10%, cadmium content≤5mg/kg.
In following examples 1-10, raw material sepiolite is that the air-dry pulverizing of appositional pattern sepiolite raw ore rear mistake 80 mesh sieve is prepared from; This raw material is provided by Ningxiang County ore powder factory of Hunan Province.Its sepiolite mass percentage content>=50%, H
2o≤10%, cadmium content≤5mg/kg.
In following examples 1-10, raw material fused(calcium magnesium)phosphate is a kind of alkaline fertilizer containing phosphate radical, is provided, P by phosphate fertilizer plant of changde, hunan province city
2o
5content>=12%, its quality meets the standard of GB20412-2006 salable product.
Embodiment 1: a kind of amendment improveing heavy metal contamination agricultural land soil, it is made up of four kinds of raw materials that weight percent is following:
Improve an amendment for heavy metal contamination agricultural land soil, the steps include: raw material unslaked lime, fused(calcium magnesium)phosphate, zeolite and sepiolite to mix in proportion, obtain product, it is a kind of agricultural land soil amendment reducing heavy metals in farmland and pollute.
Embodiment 2-embodiment 10: a kind of amendment improveing heavy metal contamination agricultural land soil, it is made up of four kinds of raw materials that weight percent is following:
| Embodiment | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Unslaked lime | 40％ | 40％ | 45％ | 45％ | 50％ | 55％ | 55％ | 60％ | 60％ |
| Fused(calcium magnesium)phosphate | 30％ | 25％ | 25％ | 30％ | 20％ | 15％ | 15％ | 15％ | 15％ |
| Zeolite | 10％ | 20％ | 15％ | 10％ | 20％ | 25％ | 20％ | 20％ | 15％ |
| Sepiolite | 20％ | 15％ | 15％ | 15％ | 10％ | 5％ | 10％ | 5％ | 10％ |
Its preparation process is identical with embodiment 1.
The pilot plant test of above-mentioned improvement heavy metal contamination agricultural land soil amendment is as described below:
During 2014, carry out Field trial test in crossing town, ChangSha, Hunan Province county and two places, gold township of Wangcheng district.Above-mentioned two places are heavy metal contamination arable land, Chang-Zhu-Tan Delta Region key area and repair pilot.
A. process is tested
Arrange and do not execute that any amendment (i.e. CK) and every mu use 120, the embodiment of the present invention 1 product (FM) three process of 160kg, three repetitions, the arrangement of random district group.Each process Monitoring of Paddy Rice Plant Area is 20m
2(4m × 5m), separates with the ridge (buried depth 0.3m) that the thick plastic film that 0.2m is wide wraps up between each process.Fertilization Level and other field management measures, respectively process is completely the same.
B. for examination crop varieties
Each process all unification selects the excellent China in sky to account for paddy rice (late rice)
C. application process
Use together with base fertilizer before turning over.
D. see (inspection) and survey project
Soil available cadmium, lead content is detected, the cadmium in agricultural-food, lead content, soil pH value during rice harves.
E. main result
Result shows, use the embodiment of the present invention 1 product, the available Cd in the polluted farmland soil of crossing town, Changsha County is made to have dropped 22.4%, 26.5% respectively, lead have dropped 26.3%, 38.3% respectively, the cadmium content in rice is made to decline 33.6%, 37.5% respectively, lead content have dropped 29.4%, 44.6% respectively, makes soil pH improve 0.20,0.27 respectively, makes rice yield improve 4.6%, 6.3% respectively.
Use the embodiment of the present invention 1 product, the available Cd in gold township of Wangcheng district polluted farmland soil is made to have dropped 24.9%, 31.4% respectively, lead have dropped 32.6%, 43.5% respectively, the cadmium content in rice is made to have dropped 33.2%, 38.9% respectively, lead content have dropped 30.4%, 41.5% respectively, make soil pH improve 0.16,0.24 respectively, make rice yield improve 3.6%, 5.2% respectively.
Above-mentioned experimental result for details see attached table 1-4:
What subordinate list-1 product was applied on paddy rice falls cadmium effect
What subordinate list-2 product was applied on paddy rice falls plumbous effect
Subordinate list-3 product improves the effect of soil pH value
The effect of increasing production that subordinate list-4 product is applied on paddy rice
Note: FM
1product consumption is 120kg/ mu, FM
2product consumption is 160kg/ mu.
Claims (8)
1. improve an amendment for heavy metal contamination agricultural land soil, it is characterized in that, it is made up of four kinds of raw materials that weight percent is following:
Raw material weight per-cent (%)
Unslaked lime 40-60,
Fused(calcium magnesium)phosphate 10-30,
Zeolite 5-25,
Sepiolite 5-20.
2. the amendment of improvement heavy metal contamination agricultural land soil according to claim 1, is characterized in that, it is made up of four kinds of raw materials that weight percent is following:
Raw material weight per-cent (%)
Unslaked lime 45-55,
Fused(calcium magnesium)phosphate 15-30,
Zeolite 10-20,
Sepiolite 10-20.
3. the amendment of improvement heavy metal contamination agricultural land soil according to claim 1, is characterized in that, it is made up of four kinds of raw materials that weight percent is following:
Raw material weight per-cent (%)
Unslaked lime 50,
Fused(calcium magnesium)phosphate 30,
Zeolite 10,
Sepiolite 10.
4. the amendment of the improvement heavy metal contamination agricultural land soil according to claim 1 or 2 or 3, is characterized in that: described unslaked lime is the powder crossing 60-140 mesh sieve after the calcining of Wingdale raw ore being pulverized.
5. the amendment of the improvement heavy metal contamination agricultural land soil according to claim 1 or 2 or 3, is characterized in that: described fused(calcium magnesium)phosphate, is a kind of alkaline fertilizer containing phosphate radical, P
2o
5content>=12%.
6. the amendment of the improvement heavy metal contamination agricultural land soil according to claim 1 or 2 or 3, is characterized in that: described zeolite is by rear for air-dry for the zeolite raw ore pulverizing powder crossing 60-140 mesh sieve.
7. the amendment of the improvement heavy metal contamination agricultural land soil according to claim 1 or 2 or 3, is characterized in that: described sepiolite is by rear for air-dry for the sepiolite raw ore pulverizing powder crossing 60-140 mesh sieve.
8. the preparation method of the amendment of arbitrary described improvement heavy metal contamination agricultural land soil in claim 1-7, its step is as follows:
Raw material unslaked lime, fused(calcium magnesium)phosphate, zeolite and sepiolite are mixed in proportion.
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| CN105778924A (en) * | 2016-04-26 | 2016-07-20 | 天津天润益康环保科技有限公司 | Fertility-increasing and pollution-controlling type soil conditioner and preparation method thereof |
| CN106811200A (en) * | 2017-01-13 | 2017-06-09 | 环保桥（湖南）生态环境修复有限公司 | A kind of complex repairation agent for reducing arsenic content in the crops of arsenic pollution area and preparation method thereof |
| CN107090292A (en) * | 2017-04-26 | 2017-08-25 | 湖南晨露环保科技发展有限公司 | A kind of soil conditioner for being passivated heavy metals in farmland and preparation method thereof |
| CN107216226A (en) * | 2017-06-30 | 2017-09-29 | 四川省地质调查院 | A kind of composition and its application method, purposes for being used to nurse one's health cadmium pollution selenium-rich soil |
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| CN107699243A (en) * | 2017-09-30 | 2018-02-16 | 惠州市欧野科技有限公司 | A kind of formula for reducing cabbage mustard and absorbing heavy metal lead |
| CN107879850A (en) * | 2017-11-28 | 2018-04-06 | 湖南本农环境科技有限公司 | A kind of acid heavy metal polluted soil of farmland conditioner and its preparation method and application |
| CN108342195A (en) * | 2018-05-15 | 2018-07-31 | 丁文强 | A kind of acid soil heavy metal pollution ecological modifying agent and preparation method thereof |
| CN108998042A (en) * | 2018-06-22 | 2018-12-14 | 武汉市秀谷科技有限公司 | Farmland soil heavy metals contaminated soil conditioner and preparation method thereof is repaired in passivation |
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| CN109777426A (en) * | 2018-12-19 | 2019-05-21 | 湘潭海泡石科技有限公司 | A kind of renovation agent and preparation method thereof suitable for cadmium pollution soil |
| CN110028974A (en) * | 2019-05-09 | 2019-07-19 | 湖南联和环保科技有限公司 | A kind of heavy metal cadmium soil remediation passivator, preparation method and applications |
| CN110283598A (en) * | 2019-07-08 | 2019-09-27 | 河南乐长农业科技有限公司 | It is a kind of for the soil remediation conditioner of agricultural pollution and its application |
| CN110591728A (en) * | 2019-10-31 | 2019-12-20 | 环保桥(湖南)生态环境工程股份有限公司 | Conditioner for mercury-polluted soil and preparation method thereof |
| CN112322300A (en) * | 2020-09-29 | 2021-02-05 | 江苏天象生物科技有限公司 | Soil conditioner for treating saline-alkali soil |
| CN112358359A (en) * | 2020-10-14 | 2021-02-12 | 浙江大学 | Soil conditioner and application thereof in reducing cadmium content of brown rice |
| CN112939696A (en) * | 2021-02-28 | 2021-06-11 | 湖南中米环保科技有限公司 | Soil conditioner for treating farmland cadmium and arsenic combined pollution and application method thereof |
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| CN104877688B (en) | 2018-01-09 |
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