CN103864543A - Soil remediation agent prepared from straws serving as raw materials as well as preparation method and application - Google Patents
Soil remediation agent prepared from straws serving as raw materials as well as preparation method and application Download PDFInfo
- Publication number
- CN103864543A CN103864543A CN201410076204.3A CN201410076204A CN103864543A CN 103864543 A CN103864543 A CN 103864543A CN 201410076204 A CN201410076204 A CN 201410076204A CN 103864543 A CN103864543 A CN 103864543A
- Authority
- CN
- China
- Prior art keywords
- soil
- repairing agent
- preparation
- stalk
- biological carbon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Processing Of Solid Wastes (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention relates to a soil remediation agent, and particularly relates to a soil remediation agent prepared from straws serving as raw materials as well as a preparation method and an application. The preparation method of the soil remediation agent comprises the following steps: mixing biochar, the straws and soil so as to obtain a compost raw material; carrying out compost treatment on the compost raw material so as to obtain the soil remediation agent. The soil remediation agent has a good remediation effect and no toxic or side effects and can be used for remedying multiple polluted soil and combined polluted soil. The preparation method of the soil remediation agent is simple in process and low in cost; the soil remediation agent can be used for remedying the polluted soil at high efficiency and also realizes the resource utilization of biomass resources, particularly the agricultural straws.
Description
Technical field
The present invention relates to a kind of soil-repairing agent, specifically relating to a kind of stalk that adopts is soil-repairing agent, preparation method and the purposes of raw material.
Background technology
Soil is the natural resources that is difficult to regeneration, is human production activity's important foundation.At present, the situation of China's soil pollution is severeer, comprises heavy metal contamination, Organic pollutants etc.The safety problem of the agricultural-food that soil pollution causes can not be ignored: soil pollution can reduce crop yield and quality, also by transmission and the inrichment harm humans health of food chain.For repairing polluted soil, in recent years countries in the world particularly developed country all dropped into huge human and material resources and financial resources are carried out soil remediation research, and make some progress.
Contaminated soil reparation is generally the pollutent by shifting, adsorbing, transform and degrade in soil, makes its concentration be reduced to acceptable level, or hazardous and noxious substances is converted into nontoxic material.At present, main restorative procedure comprises physical partition method, the dripping method of solution, fixing conversion method, electronic force method, extraction process, oxidation style, reduction method, soil-repairing agent method and biological restoration etc.But these technology in various degree exist cost high, repair and pollute single, one or more deficiencies such as repairing effect has much room for improvement.
As large agricultural country, China all can produce a large amount of biological materials every year, and such as stalk resource, but the how idle waste of stalk resource at present or on-site incineration cause serious environmental problem.As: when annual autumn harvest, a large amount of crop straw burnings, cause Air quality to worsen, and cause smogout motorway and airport simultaneously, cause motorway and socked-in, and social life and production are produced to many negative impacts.Therefore the recycling of agricultural stalk and efficient disposal become the focus that various circles of society pay close attention to.
Compost rehabilitating soil metallic pollution progress, application and environmental organism journal, 2008,14 (6): 898 ~ 904, disclose Chen Tongbin etc. applies after garbage compost in two kinds of soil, in dryland soil, the partition ratio of water-soluble state chromium has declined 26.01%, and flooded soils has declined 31.47%.
The impact research of biological carbon on Cadmium in Soil, agricultural science and technology and equipment, total the 223rd phase of the 1st phase, tell about the characteristic due to biological carbon with the high and porous of carbon amount, therefore can improve the ability that water storage is stored up, the microorganism in can soil protection.Soil is after biological carbon is processed, Cadmium Forms In Soils distributes significant variation has occurred: exchange state cadmium content has dropped to below 68% from 83%, carbonate combined content is from having risen to 15% less than 11%, Fe-Mn oxidation combined content rises to 9% from 2%, organic content rises to 9% from 3%, but biological carbon obviously can't meet actual demand to the removal efficiency of heavy metal in soil ion.
Summary of the invention
It is soil-repairing agent, preparation method and the purposes of raw material that the technical problem to be solved in the present invention is to provide a kind of stalk that adopts, described soil-repairing agent is used for removing heavy metal in soil ion and/or organic pollutant (particularly polycyclic aromatic hydrocarbons material), and clearance is higher.
The soil-repairing agent that employing stalk of the present invention is raw material, is made up of following steps, and mixed biologic carbon, stalk and soil, obtain composting material; Composting material is carried out to compost treatment, obtain described soil-repairing agent.
In described composting material, the weight ratio of described biological carbon and stalk is 0.5～2:1.
The C/N ratio of described composting material is 25～35:1.
The preparation method of described biological carbon is that under anoxia condition, pyrolysis biological material, obtains biological carbon, and biological carbon is ground into the powder that particle diameter is less than 1mm.
Described biological material is stalk, tree branches, fowl and animal excrement or active sludge.In the time using active sludge to make biological carbon, the biological carbon removal heavy metal material obtaining.
In the process of described compost treatment, controlling water ratio is 50～60%.
It is the preparation method of the soil-repairing agent of raw material that the present invention also provides a kind of stalk that adopts, and comprises the steps, mixed biologic carbon, stalk and soil, obtain composting material; Composting material is carried out to compost treatment, obtain described soil-repairing agent.
The time of described compost treatment is 25～45 days.
It is the soil-repairing agent of the raw material purposes in repairing polluted soil that the present invention also provides a kind of stalk that adopts.Soil-repairing agent of the present invention carries out original position reparation to soil, or as soil conditioner.Soil-repairing agent of the present invention is used for removing heavy metal in soil ion and/or organic pollutant, and organic pollutant refers to polycyclic aromatic hydrocarbons material especially.
The addition of described soil-repairing agent is 0.5～20% of contaminated soil dry weight.In the time that soil-repairing agent of the present invention carries out original position reparation to soil, the addition of soil-repairing agent is 2～20% of contaminated soil dry weight; When soil-repairing agent of the present invention is during as soil conditioner, the addition of soil-repairing agent is 0.5～3% of contaminated soil dry weight.
Contaminated soil of the present invention mainly refers to by heavy metal ion and/or organic pollutant (particularly polycyclic aromatic hydrocarbons material) contaminated soil.
The invention has the beneficial effects as follows, soil-repairing agent of the present invention is heavy metal in soil ion and/or organic pollutant (the particularly polycyclic aromatic hydrocarbons material) reason that clearance is high than common compost product or biological carbon: compost microbe has been improved biological carbon structure, improve the adsorption efficiency of biological carbon, increased the pollution remediation efficiency of biological carbon; Meanwhile, biological carbon has promoted the compost of stalk, has strengthened the activity of compost microbe, has increased the pollution remediation efficiency of compost microbe.In addition, soil-repairing agent of the present invention has been realized the reparation of combining of biological carbon and composting production.
The repairing effect of the soil-repairing agent that employing stalk of the present invention is raw material is good, has no side effect, and can repair multiple pollution and combined pollution.The method of preparing soil-repairing agent of the present invention, technique is simple, cost is low, and soil-repairing agent of the present invention had both efficiently been repaired contaminated soil, had realized again the particularly recycling of agricultural stalk of biomass resource.
Embodiment
embodiment 1
First, under anoxia condition pyrolysis rape straw for biological carbon, and pulverize (particle diameter is less than 1mm); Then, by biological carbon and rice straw 1/1 ratio mixing in mass ratio, add appropriate soil to control compound C/N as 30, obtain composting material; Finally, composting material is placed in to compost place and carries out compost treatment, during compost, timely adjustment water ratio makes water ratio remain on 50% ~ 60%, and turning every day is once to avoid local anaerobism, and composting process continues 36 days, until composting material forms humic substance, be soil-repairing agent.
embodiment 2
Soil-repairing agent (soil-repairing agent that embodiment 1 obtains) prepared by the present invention is added in heavy metal (take cadmium as example) and organic pollutant (take pyrene as example) contaminated soil by 5% consumption of intending rehabilitating soil dry weight, as shown in table 1 for examination soil property, turn in time, after one month, again turn over.
Table 1: for examination soil property
| pH | Organic (%) | Full nitrogen (g/kg) | Full phosphorus (g/kg) | Cation exchange capacity (cmol/kg) | Total cadmium (mg/kg) | Can extract state cadmium (mg/kg) | Pyrene (mg/kg) |
| 6.1 | 11.54 | 2.19 | 0.30 | 19.07 | 0.12 | 0.04 | 172.68 |
embodiment 3
According to soil-repairing agent of the present invention in embodiment 2, soil is carried out to reparative experiment.Table 2 is for soil-repairing agent of the present invention and general renovation agent are to extracting the clearance synopsis of state cadmium and pyrene, general renovation agent comprises common compost product, biological carbon and common compost product and biological carbon mixing renovation agent (common compost product and biological carbon equal proportion are mixed), and in this controlled trial, the production control condition of common compost product and other experiment conditions are identical with soil-repairing agent of the present invention.Sampling and measuring analysis can be extracted the clearance of state cadmium and pyrene after two months, and record data are as table 2(unit: %):
Table 2: soil-repairing agent of the present invention and general renovation agent are to extracting the clearance synopsis of state cadmium and pyrene
| ? | Common compost product | Biological carbon | Common compost product and biological carbon are mixed renovation agent | Soil-repairing agent of the present invention |
| Can extract state cadmium | 31 | 30 | 33 | 51 |
| Pyrene | 81 | 86 | 89 | 95 |
Common compost product in table 2 is rice straw composting production, and biological carbon is the standby biological carbon obtaining of pyrolysis rape straw under anoxia condition.
Common compost product from table 2 and biological carbon are mixed renovation agent and with respect to common compost product or biological carbon, the clearance of heavy metal ion (can extract state cadmium) are changed, and can know that common compost product and biological carbon are lower to the addition effect of removal heavy metal in soil ion.
The present invention is by mixed biologic carbon, stalk and soil, to be used as composting material, as can be seen from Table 2, soil-repairing agent of the present invention is very high to the clearance of pollution substance, apparently higher than the clearance of common compost, biological carbon and common compost product and biological carbon mixing renovation agent.
embodiment 4
Soil-repairing agent (soil-repairing agent that embodiment 1 obtains) prepared by the present invention is added to in examination soil by 1% consumption of intending conditioning soil dry weight,, as shown in table 1 in embodiment 2, turns in time for examination soil property, after one month, again turns over.Sampling and measuring is analyzed soil physico-chemical property after two months, and record data are as shown in table 3.
Soil physico-chemical property after table 3 soil-repairing agent of the present invention uses as soil conditioner
| pH | Organic (%) | Cation exchange capacity (cmol/kg) |
| 7.3 | 18.97 | 28.36 |
PH, organic matter and the cation exchange capacity of contrast table 1 and table 3, can find that soil-repairing agent of the present invention uses as soil conditioner time, soil physico-chemical property is obviously improved, and improved effect is good.
Although the present invention discloses as above with preferred embodiment, but not in order to limit the present invention.Any those of ordinary skill in the art, in the situation that not departing from technical solution of the present invention scope, can utilize the technology contents of above-mentioned announcement to make many possible variations and modification to technical solution of the present invention, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not depart from technical solution of the present invention,, all should drop in the scope of technical solution of the present invention protection any simple modification made for any of the above embodiments, equivalent variations and modification according to the technology of the present invention essence.
Claims (10)
1. adopting stalk is a soil-repairing agent for raw material, it is characterized in that, is made up of following steps, and mixed biologic carbon, stalk and soil, obtain composting material; Composting material is carried out to compost treatment, obtain described soil-repairing agent.
2. soil-repairing agent as claimed in claim 1, is characterized in that, in described composting material, the weight ratio of described biological carbon and stalk is 0.5～2:1.
3. soil-repairing agent as claimed in claim 1 or 2, is characterized in that, the C/N ratio of described composting material is 25 ~ 35:1.
4. soil-repairing agent as claimed in claim 1 or 2, is characterized in that, the preparation method of described biological carbon is that under anoxia condition, pyrolysis biological material, obtains biological carbon, and biological carbon is ground into the powder that particle diameter is less than 1mm.
5. soil-repairing agent as claimed in claim 1 or 2, is characterized in that, described biological material is stalk, tree branches, fowl and animal excrement or active sludge, in the time using active sludge to make biological carbon, and the biological carbon removal heavy metal material obtaining.
6. soil-repairing agent as claimed in claim 1 or 2, is characterized in that, in the process of described compost treatment, controlling water ratio is 50～60%.
7. a preparation method for the soil-repairing agent as described in claim 1-6 any one, is characterized in that, be made up of following steps, mixed biologic carbon, stalk and soil, obtain composting material; Composting material is carried out to compost treatment, obtain described soil-repairing agent.
8. preparation method as claimed in claim 7, is characterized in that, the time of compost treatment is 25～45 days.
9. the soil-repairing agent obtaining as the preparation method of the soil-repairing agent of claim 1-6 any one or the claim 7-8 any one purposes in repairing polluted soil.
10. purposes as claimed in claim 9, is characterized in that, when described soil-repairing agent carries out original position reparation to soil, the addition of soil-repairing agent is 2～20% of contaminated soil dry weight; Described soil-repairing agent is during as soil conditioner, and the addition of soil-repairing agent is 0.5～3% of contaminated soil dry weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410076204.3A CN103864543B (en) | 2014-03-04 | 2014-03-04 | Soil remediation agent prepared from straws serving as raw materials as well as preparation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410076204.3A CN103864543B (en) | 2014-03-04 | 2014-03-04 | Soil remediation agent prepared from straws serving as raw materials as well as preparation method and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103864543A true CN103864543A (en) | 2014-06-18 |
| CN103864543B CN103864543B (en) | 2015-05-13 |
Family
ID=50903625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410076204.3A Expired - Fee Related CN103864543B (en) | 2014-03-04 | 2014-03-04 | Soil remediation agent prepared from straws serving as raw materials as well as preparation method and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103864543B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384178A (en) * | 2014-09-28 | 2015-03-04 | 同济大学 | In-situ immobilizing method for heavy metal pollutants in electronic waste pollution site |
| CN104907323A (en) * | 2015-06-18 | 2015-09-16 | 浙江农林大学 | Method for remedying heavy metal contaminated soil by utilizing dead pig charcoal |
| CN105733603A (en) * | 2016-03-03 | 2016-07-06 | 河北煜环环保科技有限公司 | Composition for treating mine soil pollution and method for remedying mine soil |
| TWI548724B (en) * | 2015-01-20 | 2016-09-11 | xin-lin Guo | Removal and stability of soil heavy metal treatment methods and repair agent |
| CN106269827A (en) * | 2016-11-01 | 2017-01-04 | 南通圆平农业科技有限公司 | A kind of Soil structure condenses restorative procedure |
| CN106542713A (en) * | 2016-10-17 | 2017-03-29 | 长江水利委员会长江科学院 | A kind of method of recycling desilting sediment |
| CN106734184A (en) * | 2016-12-23 | 2017-05-31 | 镇江华域环保设备制造有限公司 | A kind of in-situ remediation method of heavy-metal contaminated soil |
| CN106903151A (en) * | 2017-03-31 | 2017-06-30 | 湖南大学 | The method that Composting repairing polluted soil is realized using stalk |
| CN107626732A (en) * | 2017-10-27 | 2018-01-26 | 中国环境科学研究院 | The method for repairing chromium-polluted soil using mineralized waste and/or composting production |
| CN107879833A (en) * | 2017-09-27 | 2018-04-06 | 湖北农谷畅响土壤修复科技股份有限公司 | A kind of soil-repairing agent made using agricultural crop straw and biological carbon |
| CN108435767A (en) * | 2018-04-08 | 2018-08-24 | 丰桢敏 | A kind of soil-repairing agent of biomass material and preparation method thereof |
| CN108515080A (en) * | 2018-04-08 | 2018-09-11 | 丰桢敏 | A kind of heavy-metal contaminated soil renovation agent and its soil remediation method |
| CN112194536A (en) * | 2020-08-31 | 2021-01-08 | 杭州植物园(杭州西湖园林科学研究院) | Soil improvement material component for improving vegetable biomass |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI556882B (en) * | 2015-09-03 | 2016-11-11 | Method for desorption of volatile organochlorine compounds by composting heat |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102553905A (en) * | 2012-02-22 | 2012-07-11 | 农业部环境保护科研监测所 | Method for remediating cadmium contaminated soil of vegetable field in situ by compounding bio-charcoal and organic fertilizer |
| CN102674917A (en) * | 2012-04-20 | 2012-09-19 | 南京农业大学 | Multifunctional soil maturing agent and preparation method thereof |
| CN102771217A (en) * | 2012-08-10 | 2012-11-14 | 北京市可持续发展促进会 | Combined ecological restoration method of deserted soil by use of plant and sludge-made biological carbon soil |
| CN103224418A (en) * | 2013-03-08 | 2013-07-31 | 南京农业大学 | Blue alga compost and its making method |
| US20130213101A1 (en) * | 2009-06-08 | 2013-08-22 | Full Circle Solutions, Inc. | Biochar |
| CN103396179A (en) * | 2013-08-06 | 2013-11-20 | 江苏太湖地区农业科学研究所 | Rapid composting method of water plant by utilization of biomass charcoal |
-
2014
- 2014-03-04 CN CN201410076204.3A patent/CN103864543B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130213101A1 (en) * | 2009-06-08 | 2013-08-22 | Full Circle Solutions, Inc. | Biochar |
| CN102553905A (en) * | 2012-02-22 | 2012-07-11 | 农业部环境保护科研监测所 | Method for remediating cadmium contaminated soil of vegetable field in situ by compounding bio-charcoal and organic fertilizer |
| CN102674917A (en) * | 2012-04-20 | 2012-09-19 | 南京农业大学 | Multifunctional soil maturing agent and preparation method thereof |
| CN102771217A (en) * | 2012-08-10 | 2012-11-14 | 北京市可持续发展促进会 | Combined ecological restoration method of deserted soil by use of plant and sludge-made biological carbon soil |
| CN103224418A (en) * | 2013-03-08 | 2013-07-31 | 南京农业大学 | Blue alga compost and its making method |
| CN103396179A (en) * | 2013-08-06 | 2013-11-20 | 江苏太湖地区农业科学研究所 | Rapid composting method of water plant by utilization of biomass charcoal |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384178A (en) * | 2014-09-28 | 2015-03-04 | 同济大学 | In-situ immobilizing method for heavy metal pollutants in electronic waste pollution site |
| TWI548724B (en) * | 2015-01-20 | 2016-09-11 | xin-lin Guo | Removal and stability of soil heavy metal treatment methods and repair agent |
| CN104907323A (en) * | 2015-06-18 | 2015-09-16 | 浙江农林大学 | Method for remedying heavy metal contaminated soil by utilizing dead pig charcoal |
| CN105733603A (en) * | 2016-03-03 | 2016-07-06 | 河北煜环环保科技有限公司 | Composition for treating mine soil pollution and method for remedying mine soil |
| CN106542713A (en) * | 2016-10-17 | 2017-03-29 | 长江水利委员会长江科学院 | A kind of method of recycling desilting sediment |
| CN106269827A (en) * | 2016-11-01 | 2017-01-04 | 南通圆平农业科技有限公司 | A kind of Soil structure condenses restorative procedure |
| CN106734184A (en) * | 2016-12-23 | 2017-05-31 | 镇江华域环保设备制造有限公司 | A kind of in-situ remediation method of heavy-metal contaminated soil |
| CN106903151A (en) * | 2017-03-31 | 2017-06-30 | 湖南大学 | The method that Composting repairing polluted soil is realized using stalk |
| CN107879833A (en) * | 2017-09-27 | 2018-04-06 | 湖北农谷畅响土壤修复科技股份有限公司 | A kind of soil-repairing agent made using agricultural crop straw and biological carbon |
| CN107626732A (en) * | 2017-10-27 | 2018-01-26 | 中国环境科学研究院 | The method for repairing chromium-polluted soil using mineralized waste and/or composting production |
| CN108435767A (en) * | 2018-04-08 | 2018-08-24 | 丰桢敏 | A kind of soil-repairing agent of biomass material and preparation method thereof |
| CN108515080A (en) * | 2018-04-08 | 2018-09-11 | 丰桢敏 | A kind of heavy-metal contaminated soil renovation agent and its soil remediation method |
| CN112194536A (en) * | 2020-08-31 | 2021-01-08 | 杭州植物园(杭州西湖园林科学研究院) | Soil improvement material component for improving vegetable biomass |
| CN112194536B (en) * | 2020-08-31 | 2022-03-25 | 杭州植物园(杭州西湖园林科学研究院) | Soil improvement material component for improving vegetable biomass |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103864543B (en) | 2015-05-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103864543B (en) | Soil remediation agent prepared from straws serving as raw materials as well as preparation method and application | |
| CN103864542B (en) | Fowl and animal excrement is adopted to be the soil-repairing agent of raw material, preparation method and purposes | |
| CN104450597B (en) | Preparation method of petroleum degrading bacteria solid microbial inoculum and method for repairing petroleum-polluted soil by using solid microbial inoculum prepared by preparation method | |
| CN109233840B (en) | Composite repairing agent for heavy metal contaminated soil and application thereof | |
| Shyamala et al. | Studies on variations in physico-chemical and biological characteristics at different maturity stages of municipal solid waste compost | |
| CN110283599A (en) | A kind of heavy-metal contaminated soil renovation agent and preparation method thereof | |
| CN106734188B (en) | Micro-ecological restoration method and composition for heavy metal pollution of farmland | |
| CN111205877B (en) | Composite repairing agent for treating farmland cadmium-polluted soil and repairing method | |
| Wu et al. | Phytoremediation of contaminants of emerging concern from soil with industrial hemp (Cannabis sativa L.): a review | |
| CN104368306A (en) | Preparation method of biochar-like matter used for heavy metal contaminated soil repair | |
| CN103788958B (en) | Take active sludge as contaminated soil top layer repair materials of raw material and preparation method thereof | |
| CN102085529A (en) | Method for repairing polycyclic aromatic hydrocarbon polluted soil by using residual active sludge | |
| CN108672492B (en) | Construction method of organic fertilizer nutrition system for biostimulation remediation of petroleum-contaminated soil | |
| Kumar et al. | Experimental and kinetics study for phytoremediation of sugar mill effluent using water lettuce (Pistia stratiotes L.) and its end use for biogas production | |
| CN103937700A (en) | Composite biological agent used for restoring cadmium polluted soil, and its preparation method | |
| CN106995704A (en) | A kind of renovation agent, its preparation method and the method with its restoration of soil polluted by heavy metal | |
| CN106914484A (en) | The ecological restoring method of rural area noxious waste pollution soil | |
| Li et al. | Analyzing nutrient distribution in different particle-size municipal aged refuse | |
| Sinha et al. | Agricultural waste management policies and programme for environment and nutritional security | |
| CN106903151A (en) | The method that Composting repairing polluted soil is realized using stalk | |
| Alvarenga et al. | Managing organic amendments in agroecosystems to enhance soil carbon storage and mitigate climate change | |
| CN103788957B (en) | Contaminated soil top layer repair materials and preparation method thereof | |
| Agarry et al. | Biostimulation and phytoremediation treatment strategies of gasoline-nickel co-contaminated soil | |
| Shoudho et al. | Biochar in global carbon cycle: Towards sustainable development goals | |
| CN103250539A (en) | Method for reducing absorption of cadmium by rape |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150513 Termination date: 20180304 |