CN101597180A - A kind of domestic waste leakage solution and application in cultivating the lawn thereof that contains EDTA - Google Patents
A kind of domestic waste leakage solution and application in cultivating the lawn thereof that contains EDTA Download PDFInfo
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- CN101597180A CN101597180A CNA2009100695762A CN200910069576A CN101597180A CN 101597180 A CN101597180 A CN 101597180A CN A2009100695762 A CNA2009100695762 A CN A2009100695762A CN 200910069576 A CN200910069576 A CN 200910069576A CN 101597180 A CN101597180 A CN 101597180A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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Abstract
The present invention relates to the rubbish effusion formed by domestic waste leakage solution and 5-15mmol/LEDTA.Wherein the ratio of weight and number of domestic waste leakage solution: 5-15mmol/LEDTA is 1: 0.01-0.03; Described domestic waste leakage solution by domestic refuse with 1: form behind the water leaching of 1-3 parts by weight.The present invention applies concentration by domestic waste leakage solution with different EDTA, the nutritive medium that comes the assembly lawn plant to cultivate, and cultivate lawn plant.Contain domestic waste leakage solution long and plant height influence all of EDTA by observation, judge the growing state of lawn plant, and realize the effective application of rubbish effusion in cultivating lawn plant lawn plant thing root.Pollution-free processing and the rubbish effusion of really having realized leaching processing domestic refuse effectively utilize, and have reached the safe of effusion discharging and the purpose of rationally utilizing again.
Description
Technical field
The invention belongs to environmental protection technical field, relate to the safe utilization method of domestic waste effusion.Say so more specifically domestic waste leakage solution and the application in cultivating the lawn thereof of a kind of EDTA of containing.
Background technology
Along with the propelling of China's urbanization, the domestic waste problem becomes increasingly conspicuous, and the suburbs, many cities has piled with rubbish, allows of no optimist like a garbage-surrounded city and developing state.For a long time, China overwhelming majority cities all are to adopt air storage, fill out ditch and fill out mode such as hole and handle domestic waste naturally, objectionable constituent in the rubbish cause serious harm to atmosphere, water body, soil etc., influence urban ecological environment, the harm people's is healthy, simultaneously also global ecological environment is caused negative influence, made the refuse treatment problem become focus and the difficult point problem of paying close attention in the worldwide scope.The direct stacking of rubbish and simple and easy landfill factory discharge a large amount of obnoxious flavoures to atmosphere, and rubbish can produce a large amount of acidity and alkaline organic pollutant in stacking putrid process, and leak out wherein heavy metal, form heavy metal, organism, the biological Trinitarian source of pollution of pathogenic bacteria, these all are difficult to meet the policy and final processing target that we handle " minimizing; innoxious; resource utilization " of domestic refuse, this just requires us to form structure and characteristics from the rubbish of the specific national conditions of China and China, seeks to be fit to effective processing mode of the domestic waste of our needs.
Leaching method commonly used at present is by residual pollutent in the water filling flushing interstices of soil medium, makes flushing current inflow place Xia Shui, reclaims the flushing current then to reach the purpose of repairing polluted soil; The drip-rinsing process that Semer etc. (Semer et al., 1996) propose is a process of removing organic and inorganic pollutant from contaminated soil, mud, settling, and this process has comprised the high-energy contact of contaminated soil.Li Haibo etc. (2005) adopt HCl+CaCl under study for action
2Compound eluent reparation is subjected to Cd, Pb Marine sediments, and the result shows: this kind method technology is simple, and technical feasibility is a kind of pollution remediation technology with higher using value.Find in the early-stage Study of laboratory that pure domestic refuse can rationally be used in and cultivate no native turf and do not influence the lawn plant percentage of germination, and under the optimal concentration condition, can improve plant height, ground biomass and chlorophyll content.
The inventor has also applied for " producing fertilizer from refuse in daily life leacheate and its production and application " (application number 200610014441.2), and it is that consumer garbage compost is soaked in water, and fully stirs after-filtration and obtains leacheate.This leacheate does not have the nutritive medium that earth culture is planted as culturing turf, not only heavy metal from consumer garbage compost is polluted and repairs, realizes that the safe and effective utilization of garbage compost plays a role, and also can reduce the turf production cost, and help protecting farmland.But along with deepening continuously of research, the inventor finds: behind the domestic refuse leaching, the rubbish effusion can overflow and enter the environment of periphery; Here it is pointed out that because effusion contains the required nutritive ingredient of abundant plant-growth in also, if directly be discharged in the environment thereupon, not only nutritive ingredient obtains waste, and can cause leaching liquor to underground water and deep soil secondary pollution risk.
But up to the present, undressed domestic waste leakage solution being carried out safe utilization is a technology that using value is arranged very much.How fully in addition the safe and reasonable use technology does not also still have the report data.Here also it is pointed out that the other effect of this technology, the environmental safety by the domestic refuse rubbish behind the leaching has also obtained improving greatly.The activation of EDTA heavy metal in to matrix and promote the effect aspect the plant absorbing heavy metal to gain unanimous acceptance is applied to the technology that lawn plant cultivates and does not also have bibliographical information but apply EDTA in the domestic waste leakage solution.
Summary of the invention
The present invention analyzes the background value of domestic waste leakage solution, and adds the EDTA of different concns in effusion, has inquired into the action rule of cultivating lawn plant, and the domestic waste leakage solution that contains EDTA is cultivated the situation of planting on the lawn make an appraisal.For the recycling of rubbish effusion behind the leaching has found outlet, reached the purpose of lawn planting simultaneously again.
The object of the present invention is to provide domestic waste leakage solution and the application in cultivating the lawn thereof of a kind of EDTA of applying.Apply under the concentration processing effect with different EDTA by different water and rubbish mass ratio, investigate long and plant height influence all the lawn plant root.The real pollution-free processing that realizes that leaching is handled has reached the safe of effusion and the purpose of rationally utilizing.
For realizing above-mentioned target, the invention provides following technical scheme: the domestic waste leakage solution of a kind of EDTA of containing is characterized in that it is made up of domestic waste leakage solution and 5-15mmol/LEDTA; Wherein the ratio of weight and number of domestic waste leakage solution: 5-15mmol/LEDTA is 1: 0.01-0.03; Described domestic waste leakage solution by domestic refuse with 1: form behind the water leaching of 1-3 parts by weight.
The using method of domestic waste leakage solution in cultivating the lawn that contains EDTA of the present invention, it is undertaken by following step:
(1) sow rye grass or Festuca Arundinacea with 20-40g/ square metre on plastic wire, early growth period utilizes the Hoagland nutritive medium to cultivate;
(2) treat that seed culture after 30 days, all pours out nutritive medium, substitute the Hoagland nutritive medium, continue that lawn plant is not had earth culture and support with the domestic waste leakage solution that contains EDTA;
(3) each once comes to replenish the rubbish effusion that contain EDTA lost by evaporation sooner or later, changes the domestic waste leakage solution that once contains EDTA weekly;
(4) handle through the domestic waste leakage solution that contains EDTA and rye grass or Festuca Arundinacea gathered in the crops in 7 days to 2 months, its overground part is carried out the measurement of plant height; Underground part carries out the long measurement of the longest fibrous root;
(5) place 80 ℃ baking oven to dry rye grass or the Festuca Arundinacea of gathering in the crops then, measure its dry weight to constant weight.
The present invention further discloses the application of domestic waste leakage solution in cultivating lawn plant that applies EDTA.Comprise lawn plant plant height, the influence of dry weight, root length, weight of root system on the ground.For example when water and rubbish mass ratio are 2: 1, applying in the effusion between 5mmol/L, 10mmol/L, 15mmol/L concentration EDTA processing Festuca Arundinacea ground dry weight and contrast and the high density EDTA processing has significant difference, and rye grass dry weight on the ground has utmost point significant difference between EDTA applies processing and contrasts.Water and rubbish mass ratio are 1: 1 and 2: 1 o'clock, all are the maximum values that have root long when effusion applies EDTA concentration for 10mmol/L during each is handled, and are that to handle differences remarkable with applying 5mmol/LEDTA in 1: 1 the processing with water and rubbish mass ratio especially.Different EDTA apply concentration and identical water and rubbish quality than leaching handle lawn plant weight of root system down all be in effusion EDTA apply concentration for 15mmol/L the time maximum value of lawn plant weight of root system arranged.Effusion apply 15mmol/L EDTA handle with contrast and in, the Festuca Arundinacea weight of root system has utmost point significant difference between the lower concentration processing.
The method that applies EDTA domestic waste leakage solution and the application in cultivating the lawn thereof disclosed by the invention compared with prior art, the positively effect that is had is:
(1) utilization of the present invention contains EDTA rubbish effusion and cultivates lawn plant, reaches the purpose that reduces the secondary pollution of rubbish effusion, for safety dumping, collection, the processing of effusion provides the testing data support.This technology reach utilize effusion in, can obtain the turf of soilless culture again, and then save the land resources of lawn planting.In addition, rubbish effusion emission matching standard, the recycling pattern is rationalized effectively.Finally reach the target that solid-state domestic refuse reduces the pollution level of environment; And the cost of the turf of soilless culture and environmental improvement has also reduced.
(2) utilization of the present invention contains the turf of the domestic waste leakage solution acquisition soilless culture of EDTA, and then the land resources of having saved lawn planting, meets the rationalization and the resource utilization standard of effusion discharging; Simultaneously, Gu the pollution level of the domestic refuse of shape also can reduce.
Embodiment
For simple and purpose clearly, hereinafter appropriate omission the description of known technology, in order to avoid those unnecessary details influences are to the description of the technical program.The present invention is described further below in conjunction with example.
Embodiment 1
(1) on plastic wire, sows Festuca Arundinacea, pouring Hoagland nutritive medium with 20g/ square metre;
(2) treat that seed culture after 30 days, all pours out nutritive medium, substitute nutritive medium, continue that lawn plant is not had earth culture and support and sprout with applying the domestic waste leakage solution that contains EDTA; Domestic waste leakage solution wherein is: water and rubbish mass ratio are 2: 1, apply EDTA5mmol/L, 10mmol/L, 15mmol/L.Wherein the ratio of weight and number of domestic waste leakage solution: 5-15mmol/LEDTA is 1: 0.01;
(3) each once comes to replenish the effusion lost by evaporation sooner or later, changes the domestic waste leakage solution that once contains EDTA weekly;
(4) after domestic waste leakage solution is handled 7 days rye grass or Festuca Arundinacea are gathered in the crops carrying out, its overground part is carried out the measurement of plant height; Underground part carries out the long measurement of the longest fibrous root;
(5) then Festuca Arundinacea is placed 80 ℃ baking oven to dry, measure its dry weight, specifically see embodiment 3 to constant weight.
Embodiment 2
(1) on plastic wire, sows rye grass, pouring Hoagland nutritive medium with 40g/ square metre;
(2) treat that seed culture after 30 days, all pours out nutritive medium, substitute nutritive medium, continue that lawn plant is not had earth culture and support and sprout with applying the domestic waste leakage solution that contains EDTA; Domestic waste leakage solution wherein is: water and rubbish mass ratio are 1: 1, and applying EDTA concentration at effusion is 5mmol/L.Wherein the ratio of weight and number of domestic waste leakage solution: 5-15mmol/LEDTA is 1: 0.03;
(3) each once comes to replenish the effusion lost by evaporation sooner or later, changes domestic waste leakage solution weekly one time;
(4) after domestic waste leakage solution is handled 30 days rye grass or Festuca Arundinacea are gathered in the crops carrying out, its overground part is carried out the measurement of plant height; Underground part carries out the long measurement of the longest fibrous root;
(5) then rye grass is placed 80 ℃ baking oven to dry, measure its dry weight, specifically see embodiment 3 to constant weight.
Embodiment 3
Materials and methods
Test materials
It is test materials that more common English ryegrass of northern China (Lolium perenne L.) and Festuca Arundinacea (Festuca arundinacea L.) are selected in this test for use.Domestic refuse is from Tianjin.Hoagland ' s nutritive medium is formed: mother liquor 1:Ca (NO
3)
24H
2O 118g/L; Mother liquor 2:KNO
350.5g/L; KH
2PO
413.6g/L; Mother liquor 3:MgSO
47H
2O24.6g/L; Mother liquor 4:H
3BO
33.09g/L; MnCl
24H
2O 0.9g/L; ZnSO
47H
2O 1.1g/L; CuSO
45H
2O7.5mg/L; (NH
4)
2MoO
4124mg/L; Mother liquor 5:EDTA-Na23.72g/L; FeCl
36H
2O 2.70g/L.After mother liquor prepares, pour in the bottle that posts label separately, put into refrigerator and preserve standby.The nutritive medium matching while using, mother liquor 1,2,3 is got 10mL respectively during preparation, and mother liquor 4,5 is got 1mL respectively, mixes to be settled to 1000mL with distilled water then.
Test method
The water planting of lawn plant is cultivated
Lawn plant adopts Hoagland ' s nutritive medium to carry out the water planting cultivation in test early stage, uses in order to follow-up test.On the beaker of bungee with plastic gauze stuck-at-00ml, make its side in beaker cave in pointing to press down wire side, on plastic gauze, cover two-layer hospital gauze then, germinating bed as the lawn plant seed, in beaker, add the about 85ml of Hoagland nutritive medium for preparing, in each beaker, sow about 150 of the seed of Festuca Arundinacea and rye grass full seed then respectively, for cooperating next step to adopt effusion to replace the processing of nutritive medium, each lawn plant will be provided with 30 processing, amounts to 60 nutritive medium water plantings and handles.The liquid level place of nutritive medium draws mark with marking pen in the beaker, and respectively add first water sooner or later to drawing the mark place every day between the incubation period of lawn plant, replenishes the moisture that scatters and disappears owing to normal evaporation with this.Utilize nutritive medium that the initial stage planting of lawn plant is cultivated under experiment indoor natural light condition and carry out, intensity of illumination is 600～800 μ molm-2s-1.Beaker is positioned in the laboratory near on the experiment table of window, and the putting position of often changing beaker is to guarantee that each beaker is to grow under even, consistent illumination condition, per week is changed one time of nutrition liquid, the nutritive medium water planting was cultivated 30 days, the medial temperature of environment is 24.5 ℃ between incubation period, and medial humidity is 56.5%.
The mensuration of leaching Design of device and morphological index
Between lawn plant water planting incubation period, carry out the test of different water and quality simultaneously than leaching treating refuse.The leaching device adopts high 15cm, and the pvc pipe of internal diameter 11cm is at bottom dress 100g sand, on put 500g, rubbish is sealed the pvc pipe bottom with four layers of hospital gauze, with sand in the supporting tube and rubbish, and is equipped with the container that receives effusion respectively below pipe.Rubbish and the sand height in pvc pipe is about 7cm, and whole leaching test is carried out under experiment indoor natural light condition.Drip the tap water that is equivalent to rubbish saturation moisture capacity 60% for the first time, one night of balance, the leaching that carries out then under different water and the rubbish mass ratio is handled, and quality: the rubbish quality is 1: 1,2: 1,3: 1, and promptly tap water measures 500g, 1000g, 1500g; Carry out three days leaching test continuously, collect the effusion that obtains after different water and rubbish quality are handled than leaching then respectively, the effusion that obtained in three days is separately mixed.Medial temperature in the leaching duration of test laboratory is 27.8 ℃, and medial humidity is 42.6%.
Apply the EDTA of 5mmol/L, 10mmol/L, 15mmol/L in than the effusion that leaching treating refuse rubbish obtains under the condition respectively in three kinds of different water and rubbish quality, the ratio of weight and number of domestic waste leakage solution: 5-15mmol/LEDTA is 1: 0.03; Become two factor randomized block experiments, test is provided with 3 repetitions.After lawn plant utilizes the nutritive medium water planting to cultivate 30 days, nutritive medium is all poured out, substitute nutritive medium and join and continue in the beaker that lawn plant is not had earth culture and support with applying effusion behind the EDTA, to continue to use processing that nutritive medium cultivates as blank.Apply and after EDTA handles 7 days lawn plant is begun to gather in the crops carrying out effusion, its overground part is carried out the measurement of plant height; Underground part carries out the long measurement of the longest fibrous root, then lawn plant is placed 80 ℃ baking oven to dry to constant weight, measures its dry weight.
Data processing
Data analysis adopts Excel software and SPSS14.0 statistical analysis software to carry out.
Result and analysis
Rubbish rubbish effusion applies the influence of EDTA to the growth of lawn plant overground part
Different EDTA apply concentration and handle down than leaching with identical water and rubbish quality, for Festuca Arundinacea water and rubbish mass ratio be add maximum concentration EDTA in 1: 1 o'clock the effusion its plant height of processing significantly (p＜0.05) be lower than that lower concentration is handled and contrast (seeing Table 1), but in the time of water and the increase of rubbish mass ratio, there is not significant difference between each plant height of handling and contrasting of Festuca Arundinacea; For rye grass, under each water and rubbish mass ratio are handled, its plant height all significantly (p＜0.05) be lower than contrast, and along with the rising of EDTA concentration of treatment in the effusion, plant height also reduces gradually, but variant EDTA concentration does not have significant difference between handling.
Table 1EDTA rubbish effusion is to the influence of lawn plant plant height
Annotate: data are represented with mean value ± standard error (SE) in the table; Different capitalizations are represented difference extremely significantly (p＜0.01) in the same hurdle; Different lowercase alphabet differentials different significantly (p＜0.05); Down together.
Applying concentration with the rubbish quality than leaching, different EDTA for identical water handles down, at water and rubbish mass ratio is during the leaching of 1: 1 and 3: 1 is handled, apply in the effusion between each concentration EDTA Festuca Arundinacea and the rye grass over-ground part dry weight and and contrast between be on close level no significant difference (seeing Table 2); But when water and rubbish mass ratio are 2: 1, in applying in the effusion, low-concentration EDTA handle Festuca Arundinacea on the ground dry weight between handling with contrast and high density EDTA significance (p＜0.05) difference is arranged, rye grass on the ground dry weight EDTA apply handle with contrast between extremely remarkable (p＜0.01) difference is arranged.
Table 2EDTA rubbish effusion is to the lawn plant influence of dry weight on the ground
Rubbish rubbish effusion applies the influence of EDTA to the lawn plant root growth
As shown in Table 3, apply than leaching, different EDTA under the concentration processing in identical water and rubbish quality, the root of two kinds of lawn plants is long all less than blank, and the toxic substance in this explanation effusion is accompanied by the rising that EDTA applies concentration, to the growth generation restraining effect of lawn plant root system.In the Festuca Arundinacea test group, rising along with water and rubbish mass ratio, EDTA concentration of treatment, this restraining effect is more remarkable, and in water and rubbish mass ratio were 3: 1 processing, effusion applied between the processing of 15mmol/L EDTA and the contrast difference extremely significantly (p＜0.01); In the rye grass test group, water and rubbish mass ratio are 1: 1 and 2: 1 o'clock, all are the maximum values that when effusion applies EDTA concentration for 10mmol/L, have root long during each is handled, especially with water and rubbish mass ratio be in 1: 1 the processing with apply 5mmol/LEDTA and handle differences significantly (p＜0.05).
The influence long of table 3EDTA rubbish effusion to the lawn plant root
Identical water applies the concentration processing with the rubbish quality than leaching, different EDTA and down the influence of lawn plant weight of root system is seen Table 5.7.Different EDTA apply concentration and identical water and rubbish quality than leaching handle lawn plant weight of root system down all be in effusion EDTA apply concentration for 15mmol/L the time maximum value of lawn plant weight of root system arranged.Effusion apply 15mmol/L EDTA handle with contrast and in, lower concentration handle between the Festuca Arundinacea weight of root system extremely remarkable (p＜0.01) difference is arranged; Apply in the processing of 15mmol/L EDTA at effusion for rye grass, and the difference between the contrast is not obvious.
Table 4EDTA rubbish effusion is to the influence of lawn plant weight of root system
The technical operation conclusion
Two kinds of different level of factor in test design: different water apply under the concentration processing effect with different EDTA with the rubbish mass ratio, and lawn plant root length and plant height are not all had remarkable influence.The variation that EDTA applies concentration has extremely significantly (p＜0.01) influence compared with the control to the Festuca Arundinacea weight of root system, when identical water and the processing of rubbish mass ratio, except that rye grass water and rubbish mass ratio are 3: 1 processing, the lawn plant weight of root system raises along with the rising that applies EDTA concentration in the effusion, and significantly (p＜0.05) difference is arranged between 5mmol/L and 15mmol/L handle, and the maximum of Festuca Arundinacea and rye grass weight of root system increase multiple is respectively 2.76 times and 2.23 times compared with the control.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (4)
1, a kind of domestic waste leakage solution that contains EDTA, it is made up of domestic waste leakage solution and 5-15mmol/LEDTA; Wherein the ratio of weight and number of domestic waste leakage solution: 5-15mmol/LEDTA is 1: 0.01-0.03; Described domestic waste leakage solution by domestic refuse with 1: form behind the water leaching of 1-3 parts by weight.
2, contain the using method of domestic waste leakage solution in cultivating the lawn of EDTA according to claim 1, it is undertaken by following step:
(1) sow rye grass or Festuca Arundinacea with 20-40g/ square metre on plastic wire, early growth period utilizes the Hoagland nutritive medium to cultivate;
(2) treat that seed culture after 30 days, all pours out nutritive medium, substitute the Hoagland nutritive medium, continue that lawn plant is not had earth culture and support with the domestic waste leakage solution that contains EDTA;
(3) each once comes to replenish the rubbish effusion that contain EDTA lost by evaporation sooner or later, changes the domestic waste leakage solution that once contains EDTA weekly;
(4) handle through the domestic waste leakage solution that contains EDTA and rye grass or Festuca Arundinacea gathered in the crops in 7 days to 2 months, its overground part is carried out the measurement of plant height; Underground part carries out the long measurement of the longest fibrous root;
(5) place 80 ℃ baking oven to dry rye grass or the Festuca Arundinacea of gathering in the crops then, measure its dry weight to constant weight.
3, the described application of domestic waste leakage solution in cultivating lawn plant that contains EDTA of claim 1.
4, the described application of claim 3 comprises lawn plant plant height, ground dry weight, long, the weight of root system of root.
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|---|---|---|---|
| CN2009100695762A CN101597180B (en) | 2009-07-06 | 2009-07-06 | Domestic waste leakage solution containing EDTA and application thereof in culturing lawns |
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| CN101597180B CN101597180B (en) | 2012-06-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102626032A (en) * | 2012-05-04 | 2012-08-08 | 天津师范大学 | Method adopting ryegrass and nitrilotriacetic acid (NTA) to restore heavy metal of compost leacheate |
| CN102630471A (en) * | 2012-05-04 | 2012-08-15 | 天津师范大学 | Method for restoring heavy metal in garbage compost by using impermeable layer |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1280032C (en) * | 2005-05-20 | 2006-10-18 | 天津师范大学 | Method for repairing urban house refuse compost heavy-metal composite pollution by synergistic lawn plant |
| CN100366585C (en) * | 2006-06-23 | 2008-02-06 | 天津师范大学 | Eluate for compost of domestic waste of city, preprtion method and application |
| CN101218929B (en) * | 2007-11-09 | 2010-12-01 | 天津师范大学 | Application of earthworm faeces, compost or earthworm faeces-compost leaching liquor soaked seeds in lawn plant |
-
2009
- 2009-07-06 CN CN2009100695762A patent/CN101597180B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102626032A (en) * | 2012-05-04 | 2012-08-08 | 天津师范大学 | Method adopting ryegrass and nitrilotriacetic acid (NTA) to restore heavy metal of compost leacheate |
| CN102630471A (en) * | 2012-05-04 | 2012-08-15 | 天津师范大学 | Method for restoring heavy metal in garbage compost by using impermeable layer |
| CN102630471B (en) * | 2012-05-04 | 2014-07-02 | 天津师范大学 | Method for restoring heavy metal in garbage compost by using impermeable layer |
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