CN105170617A - Plant combination repairing method for severely-cadmium-polluted paddy soil - Google Patents
Plant combination repairing method for severely-cadmium-polluted paddy soil Download PDFInfo
- Publication number
- CN105170617A CN105170617A CN201510610878.1A CN201510610878A CN105170617A CN 105170617 A CN105170617 A CN 105170617A CN 201510610878 A CN201510610878 A CN 201510610878A CN 105170617 A CN105170617 A CN 105170617A
- Authority
- CN
- China
- Prior art keywords
- plant
- soil
- plants
- cadmium
- paddy soil
- 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.)
- Pending
Links
Landscapes
- Processing Of Solid Wastes (AREA)
- Cultivation Of Plants (AREA)
Abstract
The invention relates to a plant combination repairing method for severely-cadmium-polluted paddy soil, and belongs to the technical field of prevention of soil heavy metal pollutions. The method is characterized in that firstly, a plant combination for repairing comprises six plants including reeds, herbs of alligator alternanthera, wild rice shoots, panicum crus, sheathed monochoria herbs and globose zosasa; secondly, according to a plant plating method, the plants of different varieties and heights are planted at intervals, and the interval between the plants is 20cm; and thirdly, in the plant harvesting period, according to the harvesting method, after the plants are planted for 50 days, and the amount of absorbed and extracted Cd reaches the saturation condition, harvesting is carried out at one time, and the whole plants are rooted out and are subjected to centralized treatment. In the paddy soil heavy Cd polluted area (the Cd concentration of the soil is 1mg/kg, and reaches more than three times of the limiting value of the soil Cd content of the edible agricultural product producing area), through three-turn plant repairing which lasts about 150 days, the Cd content of the paddy soil can be repaired to meet the edible agricultural product producing area soil quality standard (the Cd concentration of the soil is smaller than 0.3mg/kg) of the China.
Description
Technical field
The present invention is a kind of plant society restorative procedure of heavy Cd contamination paddy soil, belongs to heavy metal pollution of soil Prevention Technique.
Background technology
Since the 1950's, along with increasing considerably of the size of population, the fast development of the industry such as mining, smelting and manufacture, a large amount of use of agricultural chemicals and the discharge of municipal sewage dirt, the metallic element causing Cd, Pb, Hg, Cu etc. poisonous to biology accumulates in the environment fast, excessively, this problem of environmental pollution caused by mankind's activity attracts wide attention, the major part of these metallic elements is summarised in together, is referred to as " heavy metal (Heavymetals) " element.In each heavy metal element, cadmium (Cd) is one of element that the degree of receiving publicity is the highest, because Cd is easily absorbed by plants, and often through food chain to human body enrichment.
Cd is high to human toxicity, and the accumulation that is easily absorbed by the body.Have abundant result of study to prove, Cd has very strong carcinogenesis to the lung of animal, prostate, adrenal gland, the multiple organ such as testis and hemopoietic system.According to Japanology, the rice that long-term edible Cd content is high can cause human kidney dysfunction, causes the death rate to rise, the lost of life.Betide the Itai-itai diseases in magic basin, river, Toyama County, Japan, confirmed it is because local resident is for a long time caused by the edible rice polluted by Cd by Japanese Environment mechanism.Cd is defined as the carcinogen to the mankind by international cancer research institution (InternationalAgencyforResearchonCancer).
In Chinese industrial and mining area and developed area, along with the quick increase of the size of population, the using in a large number of industrial expansion and agricultural chemicals, the heavy metal pollution of agricultural land soil is on the rise.China digs up mine to 20 many places, smelt and the investigation of industrial wastewater pollution point shows, the farmland Cd in some areas pollutes very serious, and area and degree in rising trend.Agricultural land soil as Yang Shuo, Guangxi Pb-Zn deposits contaminated wastewater reaches 10-136mg/kg containing Cd amount; The contaminated farmland area 2800hm in Zhang Shi irrigated area, Shenyang
2, soil Cd content 5-7mg/kg; The farmland of the chimney of the Daye, hubei Province copper works cadmium of discharging to around 10km scope pollutes, and polluted agricultural land area reaches 8700hm
2; The average cadmium content of agricultural land soil that the cadmium wastewater of Shanghai zine-smelting plant discharge pollutes reaches 7.7mg/kg; " world's tungsten all " Dayu County, Jiangxi spread all over tungsten ore factory, reach hm more than 5000 by rural sewage disposal farm area
2, the average cadmium content of soil is 0.62mg/kg, similar to the cadmium pollution situation in Japan's remarkable ability basin, river.Above-mentioned IA rice grain Cd concentration is 0.29-1.09mg/kg, all exceedes state health standards.Chinese Academy of Sciences Nanjing soil the sampling Detection in county of city of Jiangsu Province 8 28 is shown, Jiangsu Part area grain (rice, wheat, flour) Cd concentration over-standard rate reach 25%.And paddy rice has an outstanding feature to be to the absorption of Cd and accumulation: often grow and be not affected, but the Cd concentration of rice has exceeded sanitary standard several times, even more than ten times.Therefore, the movement of Cd in soil-rice-human system and accumulation are shown great attention to.
According to research reports, some plants have extremely strong accumulation ability to the heavy metal in contaminated soil, the heavy metal concentration in its body can reach heavy metal concentration in its soil for growth hundreds of, even several thousand times.Therefore these plants have broad application prospects in restoration of soil polluted by heavy metal.
The phytoremediation technology of heavy-metal contaminated soil is a kind of general name utilizing the plant of self-sow or cultivate plants restoration of soil polluted by heavy metal by genetic engineering.Mainly comprise plant stability technology and plant extraction technology.Plant extraction technology is also referred to as plants enriched technology, it refers to utilize one or more heavy metals of obligate plant Root Absorption, and shifted, be stored to aerial part, then cauline leaf is gathered in the crops, focus on, thus fundamentally can remove the heavy metal in soil, but the capacity variance of the patience of different types of plant heavy metal and absorption, extraction heavy metal is very large, and the growing environment of plant and upgrowth situation absorb, extract the function effect of heavy metal to it also very large.At present, in the phytoremediation field of heavy-metal contaminated soil, in Plants types choice, configuration and upgrowth situation control, also very lack research, seriously limit the application of heavy-metal contaminated soil phytoremediation technology in real work.
The present invention, on the basis that applicant studies for many years, discloses a kind of plant society restorative procedure of heavy Cd contamination paddy soil.
Summary of the invention
Technical problem to be solved by this invention is: the plant society restorative procedure providing a kind of heavy Cd contamination paddy soil, (soil Cd concentration 1mg/kg in heavy Cd contamination rice field, reach more than 3 times of food agricultural produce Producing Area Soil Cd prohibitive content, belong to serious pollution), take turns reparation by 3, the Cd content of paddy soil can be repaired and meet China's food agricultural produce Producing Area Soil quality standard (soil Cd concentration <0.3mg/kg) (see accompanying drawing 1).
The technical solution adopted for the present invention to solve the technical problems is: a kind of plant society restorative procedure of heavy Cd contamination paddy soil, is characterized in that: (1) reparation plant society is: reed, alternanthera philoxeroides, hay bamboo shoot, barnyard grass, Monochoria vaginalis, willow leaf indocalamus 6 Plants; (2) plant cover cultivation methods is: the plant interval plantation of variety classes, differing heights, and interval 20cm between plant, ensures that every strain plant has more sufficient growing space, forms the phytobiocoenose of a vigorous growth; (3) plant harvest period and harvesting method.After planting 50 days, the amount of absorption extraction Cd reach capacity state time (see accompanying drawing 2) disposable results, whole strain plant is uprooped, then focuses on, greatly can improve repairing effect.Smooth soil after plant harvest, can carry out next round phytoremediation as required; (4) paddy field moisture management.Repair front thin water layer (about 3cm) of being poured water in rice field, then planting plants.Venting ponding after alive of plant, allows soil natural be dried to slight lack of water, and from soil in appearance, table soil starts hardening, but does not turn white, and occurs blind crack.As measured soil moisture content, maintenance soil moisture content is about 80% (± 5%) of maximum water-holding capacity.Then pour water to saturation state (not occurring obvious water layer), pour water again when reaching slight exsiccosis saturated, alternation of wetting and drying like this, to repeat, until plant harvest.
The invention has the beneficial effects as follows: at paddy soil severe Cd IA (soil Cd concentration 1mg/kg, reach more than 3 times of food agricultural produce Producing Area Soil Cd prohibitive content), by 3 to take turns, the phytoremediation of about 150 days, significantly can reduce the Cd content of soil.By the enforcement of this application art solutions, the Cd content of paddy soil can be repaired and meet China's food agricultural produce Producing Area Soil quality standard (soil Cd concentration <0.3mg/kg) (see accompanying drawing 1).
Accompanying drawing explanation
Cadmium in Soil content after the phytoremediation of the different number of times of Fig. 1
The amount of different number of days absorption extraction cadmium after Fig. 2 planting
Detailed description of the invention
Embodiment 1: a kind of plant society restorative procedure of heavy Cd contamination paddy soil.Detailed description of the invention is: (1) reparation plant society is: reed, alternanthera philoxeroides, hay bamboo shoot, barnyard grass, Monochoria vaginalis, willow leaf indocalamus 6 Plants; (2) plant cover cultivation methods is: the plant interval plantation of variety classes, differing heights, interval 20cm between plant; (3) plant harvest period and harvesting method: after planting 50 days, the amount of absorption extraction Cd reach capacity state time (see accompanying drawing 2) disposable results, whole strain plant is uprooped, then focuses on.Smooth soil after plant harvest, can carry out next round phytoremediation as required; (4) paddy field moisture management: thin water layer (about 3cm) of before repairing, being poured water in rice field, then planting plants.Venting ponding after alive of plant, allows soil natural be dried to slight lack of water, and from soil in appearance, table soil starts hardening, but does not turn white, and occurs blind crack.As measured soil moisture content, maintenance soil moisture content is about 80% (± 5%) of maximum water-holding capacity.Then pour water to saturation state (not occurring obvious water layer), pour water again when reaching slight exsiccosis saturated, alternation of wetting and drying like this, to repeat, until plant harvest.
Accompanying drawing 1 proves that the present embodiment significantly can reduce soil Cd content.In figure, data obtain under soil Cd concentration is 1mg/kg (serious pollution degree reaches more than 3 times of food agricultural produce Producing Area Soil Cd prohibitive content) condition.Taken turns by this application art solutions 3, the enforcement of about 150 days, the Cd content of paddy soil can be repaired and meet China's food agricultural produce Producing Area Soil quality standard (soil Cd concentration <0.3mg/kg)
Accompanying drawing 2 proves that the suitable time of plant harvest is after planting 50 days, and the total amount that now plant absorption extracts Cd reaches capacity state, and now results can improve repairing effect greatly.
Claims (3)
1. a plant society restorative procedure for heavy Cd contamination paddy soil, is characterized in that reparation plant society is: reed, alternanthera philoxeroides, hay bamboo shoot, barnyard grass, Monochoria vaginalis, willow leaf indocalamus 6 Plants.
2. method according to claim 1, is characterized in that plant cover cultivation methods is: the plant interval plantation of variety classes, differing heights, interval 20cm between plant.
3. method according to claim 1, is characterized in that plant harvest period and harvesting method are: after planting 50 days, the amount of absorption extraction Cd reach capacity state time disposable results, whole strain plant is uprooped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510610878.1A CN105170617A (en) | 2015-09-23 | 2015-09-23 | Plant combination repairing method for severely-cadmium-polluted paddy soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510610878.1A CN105170617A (en) | 2015-09-23 | 2015-09-23 | Plant combination repairing method for severely-cadmium-polluted paddy soil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105170617A true CN105170617A (en) | 2015-12-23 |
Family
ID=54893305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510610878.1A Pending CN105170617A (en) | 2015-09-23 | 2015-09-23 | Plant combination repairing method for severely-cadmium-polluted paddy soil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105170617A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109226219A (en) * | 2018-10-17 | 2019-01-18 | 常州大学 | A kind of method that nitrogenous fertilizer strengthens alternanthera philoxeroides cadmium pollution soil repair |
| CN110508612A (en) * | 2019-09-02 | 2019-11-29 | 江苏省地质调查研究院 | The method of cadmium is remained in a kind of removing farmland |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4568893B2 (en) * | 2001-02-26 | 2010-10-27 | Ｄｏｗａエコシステム株式会社 | Purification method of contaminated soil |
| CN102303040A (en) * | 2011-09-26 | 2012-01-04 | 中山大学 | Remediation method for acid heavy metal contaminated soil |
| CN102553903A (en) * | 2012-01-11 | 2012-07-11 | 中国科学院南京土壤研究所 | Remediation method of heavy metal contaminated soil |
| CN102934580A (en) * | 2012-11-21 | 2013-02-20 | 中国科学院亚热带农业生态研究所 | Planting method of jute in heavy-metal contaminated soil |
| CN102986423A (en) * | 2012-11-25 | 2013-03-27 | 溧阳市天目湖保健品有限公司 | Method for planting paspalum distichum on lead zinc ore tailing |
-
2015
- 2015-09-23 CN CN201510610878.1A patent/CN105170617A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4568893B2 (en) * | 2001-02-26 | 2010-10-27 | Ｄｏｗａエコシステム株式会社 | Purification method of contaminated soil |
| CN102303040A (en) * | 2011-09-26 | 2012-01-04 | 中山大学 | Remediation method for acid heavy metal contaminated soil |
| CN102553903A (en) * | 2012-01-11 | 2012-07-11 | 中国科学院南京土壤研究所 | Remediation method of heavy metal contaminated soil |
| CN102934580A (en) * | 2012-11-21 | 2013-02-20 | 中国科学院亚热带农业生态研究所 | Planting method of jute in heavy-metal contaminated soil |
| CN102986423A (en) * | 2012-11-25 | 2013-03-27 | 溧阳市天目湖保健品有限公司 | Method for planting paspalum distichum on lead zinc ore tailing |
Non-Patent Citations (1)
| Title |
|---|
| 李光辉等: "不同湿地植物的根系酸化作用与重金属吸收", 《生态环境学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109226219A (en) * | 2018-10-17 | 2019-01-18 | 常州大学 | A kind of method that nitrogenous fertilizer strengthens alternanthera philoxeroides cadmium pollution soil repair |
| CN110508612A (en) * | 2019-09-02 | 2019-11-29 | 江苏省地质调查研究院 | The method of cadmium is remained in a kind of removing farmland |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104289509B (en) | The method of biological restoration heavy-metal contaminated soil | |
| CN102172607A (en) | Use of Debregeasia orientalis C. J. Chen in remediation of cadmium heavy metal contaminated soil | |
| CN105689376A (en) | Method for repairing heavy metal contaminated soil or water body by utilizing hyperaccumulator polymerization | |
| CN107081335A (en) | A kind of ecological restoring method of heavy metal pollution agricultural land soil | |
| CN107199236A (en) | A kind of method of utilization biological carbon and Phytoremediation of Soils Contaminated by Heavy Metals | |
| CN102349403A (en) | Sewage irrigation soil heavy metal pollution large biomass non-super enrichment ecological restoration method | |
| Klooss et al. | Charred root tubers of lesser celandine (Ficaria verna HUDS.) in plant macro remain assemblages from Northern, Central and Western Europe | |
| CN105665439A (en) | Practical method for farmland soil cadmium pollution remediationby planting Salix jiangsuensis J795 | |
| CN106914480A (en) | A kind of method for combining green plants restoration of soil polluted by heavy metal | |
| CN105170617A (en) | Plant combination repairing method for severely-cadmium-polluted paddy soil | |
| CN103586268A (en) | Application of lantana camara to remediation of heavy metal zinc, lead and copper polluted soil | |
| CN106345795A (en) | Method for promoting symphytum officinale to enrich and absorb heavy metal from heavy metal contaminated soil | |
| CN102441562A (en) | Method for promoting broad bean in restoring and treating cadmium-polluted soil by using citric acid | |
| CN104148378A (en) | Method for repairing cadmium-pollution farmland soil | |
| CN104255392A (en) | Irrigation method for reducing arsenic concentration of rice in fields with severe arsenic pollution | |
| CN104001713B (en) | Cover the method that tolerant plant improves root of bidentate achyranthes chrysanthemum reparation orchard cadmium pollution soil ability | |
| Jaikumar | A review on water hyacinth (Eichhornia crassipes) and phytoremediation to treat aqua pollution in Velachery lake, Chennai-Tamilnadu | |
| Razanov et al. | Yield, chemical composition and the level of accumulation of heavy metals in the vegetative mass and seeds of milk thistle (Silybum marianum L.) in different types of organic fertilizer | |
| Ploetz | Phytophthora root rot of avocado. | |
| Talpur et al. | A review on the enhancement of rice production in paddy field with minimum input of water | |
| Mridha et al. | Green cultivation of moringa on arid agricultural land in Saudi Arabia | |
| Ahmed et al. | Restoration and conservation of deteriorated arid land by a native thorny shrub Lycium shawii | |
| Schwandt et al. | Whitebark pine direct seeding trials in the Pacific Northwest | |
| CN105382022A (en) | Plant composition repair method for severe zinc polluted rice field | |
| CN105127184A (en) | Phytoremediation combination method for severe-chromium-pollution paddyfield soil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151223 |
|
| WD01 | Invention patent application deemed withdrawn after publication |