CN101597181B - Method for activating heavy metals in domestic waste composts by utilizing ammonium sulfate mixed liquor - Google Patents
Method for activating heavy metals in domestic waste composts by utilizing ammonium sulfate mixed liquor Download PDFInfo
- Publication number
- CN101597181B CN101597181B CN2009100695739A CN200910069573A CN101597181B CN 101597181 B CN101597181 B CN 101597181B CN 2009100695739 A CN2009100695739 A CN 2009100695739A CN 200910069573 A CN200910069573 A CN 200910069573A CN 101597181 B CN101597181 B CN 101597181B
- Authority
- CN
- China
- Prior art keywords
- ammonium sulfate
- edta
- organic acid
- compost
- heavy metal
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
Landscapes
- Fertilizers (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a method for activating heavy metals in domestic waste composts by utilizing ammonium sulfate mixed liquor, which comprises the following steps: sieving and sorting the domestic waste composts polluted by heavy metals, eluting the domestic waste composts together with different ammonium sulfate mixed liquor respectively based on the weight ratio of 1:10-15 for 2-3h; respectively collecting compost leacheate, filtering and digesting the compost leacheate and determining the content changes of such heavy metals as Cd, Cr, Cu, Ni, Pb and Zn in the leacheate, thus realizing activation effects on the heavy metals in the domestic waste composts. In the invention, the joint action of the ammonium sulfate and EDTA or the organic acid is considered and the activation effects of 6 heavy metal elements with higher contents in the domestic composts are analyzed to provide earlier-stage technical links for applying the ammonium sulfate mixed liquor to chelate-induced phytoremediation of the domestic waste composts and further provide technical support for applying the ammonium sulfate mixed liquor in inducing lawn plants to remedy the heavy metals.
Description
Technical field
The invention belongs to environmental protection technical field, relate to the improvement and the restorative procedure of producing fertilizer from refuse in daily life.A kind of method of utilizing the ammonium sulfate mixed liquor activating heavy metals in domestic waste composts of saying so more specifically.
Background technology
With domestic waste collect in heaps, insulation stores, fermentation, under the manual control condition, utilizes the biochemical action of microorganism, the process that the organic matter degradation in the rubbish is converted into stable similar humus soil material is called the compost treatment of rubbish.This treating processes is decomposed the perishable organism in the rubbish, be transformed into the organic fertilizer that is rich in nutritive elements such as organism and nitrogen, phosphorus, potassium, making rubbish realize getting back to natural benign cycle again from nature, is the important channel of the economical and effective processing and the municipal wastes of dissolving.With regard to the particular case of China's rubbish, the perishable organic content in the domestic refuse is higher, adopts composting technology can reach treatment effect preferably.Domestic refuse is carried out the problem of outlet that composting both can solve municipal wastes, can reach the purpose of renewable resources again, have certain economic benefits and social benefit, and at present countries in the world are all the principle of " three change " policy of " innoxious, minimizing, resource utilization " of municipal solid wastes as comprehensive solution municipal wastes, on this development trend, adopt composting process to handle municipal wastes and meet this direction, and be regarded as handling the approach of a significant of domestic waste.
Owing to also contain materials such as heavy metal, pathogenic bacteria in the garbage compost, therefore be directly used in agricultural and make that fears are entertained that can cause quality of agricultural product bad, contaminate environment, the negative effect of health risk, thus had a strong impact on its agricultural prospect.The ascorbic content of Chinese cabbage reduces after for example using compost continuously, and the many more ranges of decrease of compost usage quantity are big more, and each handles all comparisons according to obvious decline is arranged the Chinese cabbage crude fiber content.Heavy metal pollution problem in the garbage compost is the most serious negative effect, how to reduce the toxic effect of heavy metal in the compost, and improving and improving composting technology and quality has become hot issue in the garbage compost research in recent years.
Low molecular organic acids (low molecular weight organic acids) is the functional organism of a ubiquitous class in the soil, be mainly derived from organic matter decomposition, plant root exudation and microorganism secretion and metabolism, in rhizosphere environment, play an important role, and low molecular weight organic acid is a kind of natural sequestrant, there are some researches show that organic acid can discharge the solid-state heavy metal of soil by complexing action, strengthen the heavy metal activity and come fortification of plants to absorb, accumulate, thereby improve phytoremediation efficient and shorten repairing efficiency.Also there is simultaneously the research report to point out, organic acid can combine with the heavy metal coordination and form stable complex body, the metallic transition of ionic state is become low toxicity or nontoxic chelating attitude form, and participate in the processes such as absorption, transportation, accumulation of heavy metal element, thereby promote plant tired to the ultraproduct of heavy metal, alleviate the toxic effect of excess metal, reach the purpose of detoxifcation plant heavy metal of body plant.At present existing many scholar's research organic acid the influence of cadmium form and absorption, desorb in the soil and organic acid are coerced down the influence of vine growth and development to cadmium, there are some researches prove that also it is to have formed " cadmium-low molecular organic acids " mixture that organic acid can promote in the soil the release of cadmium and the absorption of promotion plant.Therefore, the interaction of soil-plant system organic acid and metal ion is very important for the dissolving and the migration of insoluble heavy metal, result of study points out that also forming metallo-chelate by organic acid and cadmium has not only increased the movability of cadmium in the plant materials, and also can weaken cadmium in the environment to the murder by poisoning of plant materials.
Kramer etc. (1996) discover that the organic acid of plant rhizosphere zone chelating heavy metal mainly comprises citric acid, oxysuccinic acid and oxalic acid etc.Citric acid can reduce soil to absorption plumbous, cadmium, has just activated lead and the cadmium element in the soil; There are some researches prove also that simultaneously small molecular organic acid and heavy metal generation chelating or coordination in rhizospheric environment influences the form that exists of heavy metal in the soil, improve the solubleness of heavy metal, increase the ability of moving that metal moves, and then reach the activatory effect, and different types of organic acid is also different to the influence of heavy metal in soil.Lawn plant is applied to also see in the chelation evoked phytoremediation that in conjunction with organic acid report is arranged, the result shows: the existence of low molecular weight organic acid has obviously reduced the absorption of cadmium on soil, other organic acid salt of oxalic acid and citric acid and branch thereof all has activation to dark brown earth iron, and the iron of the activated release of dark brown earth is to increase along with the increase of low molecular organic acids/salt concn, and the activation effect of citric acid is greater than oxalic acid, may be because the sequestering power of iron is better than oxalic acid to citric acid and citric acid has bigger dissociation constant.This shows that reparation is feasible to heavy metal in soil to utilize organic acid, but does not see bibliographical information as yet about the method for utilizing ammonium sulfate to prepare the mixed solution activating heavy metals in domestic waste composts.
Summary of the invention
The objective of the invention is to activate heavy metal in the consumer garbage compost by adding ammonium sulfate and EDTA and three kinds of organic acids, after carrying out leaching or carrying out the organic acid for activating processing, the heavy metal element that pollutes in the consumer garbage compost is come out or increase the content of soluble state heavy metal in the consumer garbage compost solution, handle or improve plant to the absorption of heavy metal and then reach the purpose of phytoremediation by collecting consumer garbage compost solution then, thereby alleviate the pollution level of consumer garbage compost, the present invention carries out the activation test to the heavy metal in the compost, consider between ammonium sulfate and EDTA or the organic acid whether existence effect simultaneously, the 6 heavy metal species element (Crs higher to content in the compost, Zn, Cu, Cd, Ni, Pb) activation effect is analyzed, provide early-stage Study in the hope of being applied in the chelation evoked phytoremediation of consumer garbage compost for ammonium sulfate mixed liquor, and ready for further ammonium sulfate mixed liquor being applied to induce the lawn plant heavy metal to repair in the The Characteristic Study.For realizing above-mentioned target, the invention provides following technical scheme:
A kind of ammonium sulfate mixed liquor is characterized in that described ammonium sulfate mixed liquor is: ammonium sulfate and EDTA or ammonium sulfate and organic acid or ammonium sulfate and EDTA and organic; Wherein:
(1) ammonium sulfate: EDTA is 1gL (NH
4)
2SO
4: 50-100mmol/LEDT;
(2) ammonium sulfate: organic acid is 1g/L (NH
4)
2SO
4: 50-100mmol/LEDTA;
(3) ammonium sulfate: EDTA: organic acid is 1g/L (NH
4)
2SO
4: 50-100mmol/LEDT: 50-100mmol/L organic acid.
Ammonium sulfate mixed liquor of the present invention, organic acid wherein are oxysuccinic acid, citric acid or oxalic acid.
The weightmeasurement ratio of ammonium sulfate mixed liquor of the present invention, wherein ammonium sulfate: EDTA is: 1: 0.01-0.03; Ammonium sulfate: the organic acid weightmeasurement ratio is 1: 0.01-0.03; Ammonium sulfate: EDTA: the organic acid weightmeasurement ratio is 1: 0.01-0.03: 1-3.
Ammonium sulfate mixed liquor of the present invention prepares the method for activating heavy metals in domestic waste composts, and it is undertaken by following step:
(1) will contain the consumer garbage compost of heavy metal contamination, the sorting of sieving, natural air drying grinds, and sieves, and is standby;
(2) with standby consumer garbage compost and different ammonium sulfate mixed liquors with 1: the 10-15 parts by weight are leaching 2-3h respectively;
(3) collect the compost eluent solution then respectively, filter, carry out digestion process, measure the content of heavy metal Cd, Cr, Cu, Ni, Pb, Zn in the solution.
Experimental result of the present invention shows: each is handled ammonium sulfate mixed liquor the content of heavy metal element in the compost is all had activating effect, wherein with the best results of EDTA, activation percentage to Cd in the compost reaches 66.5%, and each mainly is with the variation of EDTA and organic acid concentration the volume of activation of heavy metal element in the compost to be produced main influence in handling.The promoter action that during for example the oxysuccinic acid of ammonium sulfate and 100mmol/L is handled the volume of activation of Pb is shown and handles; After with ammonium sulfate and EDTA and organic acid processing compost, to heavy metal element activating effect wherein all are activation effect the bests with 100mmol/L EDTA, wherein the activation effect for Pb is the strongest, digestion process in the compost can't can be activated extraction by dissolved Pb, the volume of activation of Pb was greater than former compost under therefore should handling.
The method of utilizing the ammonium sulfate activating heavy metals in domestic waste composts disclosed by the invention compared with prior art, the positively effect that is had is:
The present invention is directed to the producing fertilizer from refuse in daily life that contains heavy metal contamination, utilize ammonium sulfate and EDTA and three kinds of organic acid (oxysuccinic acid, citric acid, oxalic acid) heavy metal in the compost is carried out the activation test, consider between ammonium sulfate and EDTA or the organic acid whether existence effect simultaneously, the 6 heavy metal species element (Crs higher to content in the compost, Zn, Cu, Cd, Ni, Pb) activation effect is analyzed, provide early-stage Study in the hope of being applied in the chelation evoked phytoremediation of consumer garbage compost for organic acid, and ready for further organic acid being applied to induce the lawn plant heavy metal to repair in the The Characteristic Study.
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) will contain the consumer garbage compost of heavy metal contamination, the sorting of sieving, natural air drying grinds, and sieves, and is standby;
(2) standby consumer garbage compost is distinguished leaching 2h with different ammonium sulfate mixed liquors with 1: 10 parts by weight; Wherein ammonium sulfate is 1g/L (NH
4)
2SO
4: EDTA 50mmol/LEDT.
(3) collect the compost eluent solution then respectively, filter, carry out digestion process, measure the content of heavy metal Cd, Cr, Cu, Ni, Pb, Zn in the solution.Specifically see embodiment 3.
Embodiment 2
(1) will contain the consumer garbage compost of heavy metal contamination, the sorting of sieving, natural air drying grinds, and sieves, and is standby;
(2) standby consumer garbage compost is distinguished leaching 3h with different ammonium sulfate mixed liquors with 1: 15 parts by weight; Ammonium sulfate: EDTA wherein: organic acid is: 1g/L (NH
4)
2SO
4: 100mmol/LEDT: 50mmol/L citric acid.
(3) collect the compost eluent solution then respectively, filter, carry out digestion process, measure the content of heavy metal Cd, Cr, Cu, Ni, Pb, Zn in the solution.Specifically see embodiment 3.
Embodiment 3
(1) experiment material
For having a try agent
Disodium ethylene diamine tetraacetate (ethylenediaminetetraacetic acid-Na
2), chemical pure, content is no less than 99.0%; DL-oxysuccinic acid (C
4H
6O
5), analytical pure, content is no less than 99.0%; Citric acid (C
6H
8O
7H
2O), analytical pure, content is no less than 99.5%; Oxalic acid (C
2H
2O
42H
2O), analytical pure, content is no less than 99.5%; Ammonium sulfate ((NH
4)
2SO
4), chemical pure, content is no less than 99.0%.
For the examination consumer garbage compost
From Tianjin Xiao Dian composting plant, its basic physical and chemical sees Table 1 to consumer garbage compost (being called for short compost down).To reject things such as stone, glass, plastics bag and plant residue for the examination consumer garbage compost, natural air drying carries out milled processed, grinds with ball mill, then crosses 80 mesh sieves, preservation, standby.
Table 1 is for examination consumer garbage compost physics and chemistry
| Testing index | Consumer garbage compost |
| pH | 7.62 |
| Full sharp water content ml/g | 0.76 |
| Unit weight g/ml | 0.85 |
| Full nitrogen % | 5.18 |
| Full potassium g/kg | 50.83 |
| Available phosphorus mg/kg | 77.92 |
| Organic % | 12.12 |
| Cu(μg/g) | 238.73 |
| Cd(μg/g) | 1.97 |
| Zn(μg/g) | 496.38 |
| Ni(μg/g) | 33.42 |
| Pb(μg/g) | 172.11 |
| Cr(μg/g) | 67.00 |
(2) test method
Accurately take by weighing through grinding the compost 2.5g of processing, put into the Erlenmeyer flask of 100ml, the amount that adds liquid is 25ml, and the proportioning that adds liquid in each different treatment sees Table 2, to add 25ml distilled water and 1g/L (NH fully
4)
2SO
4Processing in contrast, each processing is provided with 3 repetitions.
The scheme that adds liquid in the table 2 ammonium sulfate treating refuse compost different treatment
| Handle | Add liquid | Handle | Add liquid |
| 1 | Distilled water | 10 | 100mmol/L oxysuccinic acid+1g/L (NH 4) 2SO 4 |
| 2 | 1g/L(NH 4) 2SO 4 | 11 | The 50mmol/L citric acid |
| 3 | 50mmol/L?EDTA | 12 | The 100mmol/L citric acid |
| 4 | 100mmol/L?EDTA | 13 | 50mmol/L citric acid+1g/L (NH 4) 2SO 4 |
| 5 | 50mmol/L?EDTA+1g/L(NH 4) 2SO 4 | 14 | 100mmol/L citric acid+1g/L (NH 4) 2SO 4 |
| 6 | 100mmol/L?EDTA+1g/L(NH 4) 2SO 4 | 15 | 50mmol/L oxalic acid |
| 7 | The 50mmol/L oxysuccinic acid | 16 | 100mmol/L oxalic acid |
| 8 | The 100mmol/L oxysuccinic acid | 17 | 50mmol/L oxalic acid+1g/L (NH 4) 2SO 4 |
| 9 | 50mmol/L oxysuccinic acid+1g/L (NH 4) 2SO 4 | 18 | 100mmol/L oxalic acid+1g/L (NH 4) 2SO 4 |
Compost and the different treatment of will packing into adds Erlenmeyer flask behind the liquid and puts into 25 ℃ of constant temperature oscillators vibration 2h down, leave standstill balance 0.5h after will Erlenmeyer flask taking out, then with the compost extracting liquid filtering, be settled in the volumetric flask of 25ml with distilled water.The concrete digestion method of extracting solution is as follows: change the compost extracting solution behind the constant volume over to 100ml in the beaker of peroxy-nitric acid acidification, add 10ml nitric acid, be placed on the hot plate and heat, when the liquid in the beaker adds the HClO of 1ml during near evaporate to dryness again
4Continuation is heated on hot plate and is caught up with acid, at last with 1% nitric acid with the resolution of precipitate in the beaker and shift, be settled in the volumetric flask of 25ml, with the content of heavy metal (Cd, Cr, Cu, Ni, Pb, Zn) in the TAS-990 atomic absorption spectrophotometer solution, the collection of data adopts AAWin2.1 software to carry out.
(3) data processing: data analysis adopts Excel 2003 softwares and SPSS 14.0 statistical analysis softwares to carry out.
(4) result and analysis
Ammonium sulfate and EDTA handle the activating effect to the compost heavy metal
Activation to heavy metal in the compost under ammonium sulfate and EDTA handle sees Table 3.After ammonium sulfate and EDTA handle, can extremely significantly increase the volume of activation of heavy metal in the compost compared with the control, and this activation capacity is an enhanced thereupon under the high density EDTA treatment condition.In the 6 heavy metal species elements that test is measured, contrast of the volume of activation of heavy metal element and distilled water and (NH under high density (100mmol/L) the EDTA treatment condition
4)
2SO
4Compared extremely significantly (p＜0.01) difference between contrast.In two different concns that EDTA handles, no matter whether (NH is arranged
4)
2SO
4Processing, the content of the 6 heavy metal species elements of surveying all shows in the remarkable difference of (p＜0.01) of EDTA different treatment concentration compole.The processing of ammonium sulfate and 100mmol/L EDTA shows the negative interaction of processing to the activation results of Zn, promptly ammonium sulfate and the volume of activation of handling back Zn extremely significantly (p＜0.01) be lower than the processing of 100mmol/L EDTA.
Table 3 ammonium sulfate and EDTA handle the volume of activation to the compost heavy metal
Annotate: EDTA-50 represents the EDTA of 50mmol/L in the table, and EDTA-(NH4) 2SO4-50 represents that (NH4) 2SO4 of 1g/L and concentration are the EDTA of 50mmol/L, down together.Data are with mean value ± standard error (SE) expression in the table, and it is remarkable that different lowercases are illustrated in 0.05 level difference in the same hurdle, and it is remarkable that different capitalizations are illustrated in 0.01 level difference, down together.
Ammonium sulfate and oxysuccinic acid are handled the activating effect to the compost heavy metal
The activation that ammonium sulfate and oxysuccinic acid are handled the compost heavy metal sees Table 3.4.After ammonium sulfate and oxysuccinic acid are handled, be to increase to the activation capacity of 6 heavy metal species elements of test determination, and compare, the volume of activation of 6 heavy metal species elements is reached extremely remarkable (p＜0.01) difference with two groups of contrasts along with the rising of malic acid concentration; The volume of activation of heavy metal element all reaches extremely significantly (p＜0.01) difference between two concentration of treatment of oxysuccinic acid.With (NH
4)
2SO
4Control treatment is compared, and the volume of activation of Cr was to significant difference (p＜0.05) level under the 50mmol/L oxysuccinic acid was handled, and the volume of activation of all the other 5 kinds of elements all reaches extremely significantly (p＜0.01) difference in variant processing.The promoter action that during the oxysuccinic acid of ammonium sulfate and 100mmol/L is handled the volume of activation of Pb is shown and handles, during this is handled the volume of activation of Pb extremely significantly (p＜0.01) handle greater than the 100mmol/L oxysuccinic acid.
Table 4 ammonium sulfate and oxysuccinic acid are handled the volume of activation to the compost heavy metal
Ammonium sulfate and citric acid treatment are to the activating effect of compost heavy metal
Activation to the compost heavy metal under ammonium sulfate and the citric acid treatment sees Table 5.Compare with two groups of control treatment, the 6 heavy metal species elements that test is measured all show extremely significantly (p＜0.01) difference through the volume of activation after ammonium nitrate and the citric acid treatment.The activation capacity of while heavy metal element is to increase along with the rising of the concentration of citric acid treatment, except that Cd has only citric acid treatment, no matter whether all the other 5 kinds of elements have ammonium nitrate and processing, between two kinds of different citric acid treatment concentration, all show utmost point significant difference (p＜0.01).For Zn and Cu element, in being the processing of 50mmol/L, citric acid compares with ammonium nitrate and same concentrations citric acid treatment, volume of activation to these two kinds of elements reaches extremely significantly (p＜0.01) difference, and be carry out and handle the back element volume of activation reduce extremely significantly, show the negative interaction of processing.
Table 5 ammonium sulfate and citric acid treatment are to the volume of activation of compost heavy metal
Ammonium sulfate and oxalic acid treatment are to the activating effect of compost heavy metal
Activation to the compost heavy metal under ammonium sulfate and the oxalic acid treatment sees Table 6.The activation capacity of heavy metal element is to increase along with the rising of concentration of oxalic acid, and the volume of activation that removes Cd does not show difference to the rising of concentration of oxalic acid, all shows extremely remarkable (p＜0.01) difference between all the other each high density oxalic acid treatment and the contrast.When concentration of oxalic acid is 50mmol/L, compare with the distilled water contrast, change to the activation capacity of element does not have significant difference, and except the ammonium sulfate and the processing of Cd and two kinds of elements of Pb, all the other all reached utmost point significant difference (p＜0.01) with contrast when concentration of oxalic acid was 100mmol/L.With (NH
4)
2SO
4Contrast is compared, and the volume of activation of Cr all shows utmost point significant difference (p＜0.01) with it when two kinds of concentration of oxalic acid are handled; The volume of activation of Zn, Cu, three kinds of elements of Ni does not have significant difference at concentration of oxalic acid during for 50mmol/L, shows utmost point significant difference (p＜0.01) when 100mmol/L; The volume of activation of Pb element 100mmol/L oxalic acid do not add ammonium nitrate and processing in, reveal utmost point significant difference (p＜0.01) with synopsis, volume of activation to this element in processing reduces on the contrary, with contrast and lower concentration oxalic acid treatment be same level, also show the negative interaction that ammonium sulfate is handled.For Zn, Cu, Ni three heavy metal species elements, extremely significantly increased the volume of activation of these three kinds of elements in ammonium sulfate and the 100mmol/L oxalic acid treatment, show the promoter action of ammonium sulfate and processing.
Table 6 ammonium sulfate and oxalic acid treatment are to the volume of activation of compost heavy metal
EDTA and organic acid are handled the comparison to heavy metallic activation amount in the compost under the optimal activation concentration
EDTA and three kinds of organic acids be respectively under 100mmol/L concentration to compost in the activation efficiency maximum of heavy metal, with the EDTA of 100mmol/L and oxysuccinic acid, citric acid, oxalic acid the activation results of heavy metal in the compost is analyzed, by table 3.7 as can be known, in the 6 heavy metal species elements that test is measured, for Zn, Cd, four kinds of elements of Cu, Pb, EDTA is to its volume of activation maximum, and the activation effect of oxalic acid is the poorest, and its volume of activation is compared difference extremely significantly (p＜0.01) between the two; Citric acid is better than EDTA to the activation effect of Cr, and its volume of activation and each all have utmost point significant difference (p＜0.01) between handling; Citric acid and EDTA are on close level to the volume of activation of Ni, and all extremely significantly greater than oxysuccinic acid and oxalic acid, and also there is extremely significantly (p＜0.01) difference in the volume of activation to Ni between oxysuccinic acid and the oxalic acid treatment.
Table 7100mmol/L EDTA and organic acid are to compost heavy metal element volume of activation relatively
Ammonium sulfate and EDTA and organic acid are handled the influence to heavy metallic activation percentage ratio in the compost
Compare with each contents of heavy metal elements in the former compost of table 1, after handling compost, the influence of heavy metal element activating effect percentage ratio is wherein seen Table 8 with ammonium sulfate and EDTA and organic acid.In the 6 heavy metal species elements that test is measured, except that Cr concerning all the other 5 kinds of elements, all are activation effect the bests with 100mmol/L EDTA, wherein the activation effect for Pb is the strongest, digestion process in the compost can't can be activated extraction by dissolved Pb, the volume of activation of Pb was greater than former compost under therefore should handling.We see that also using organic acid to carry out activation treatment has also reached good effect simultaneously, and all are that maximum activation percentage ratio is arranged with the organic acid of ammonium sulfate and high density and during use high density organic acid is handled separately.
Table 8 ammonium sulfate and EDTA and organic acid are handled the comparison to compost heavy metallic activation percentage ratio
Technology is used conclusion
In the research of using ammonium sulfate and EDTA and organic acid for activating processing consumer garbage compost, the result shows: each content of handling heavy metal element in the compost all has activating effect, wherein with the best results of EDTA, activation percentage to Cd in the compost reaches 66.5%, and each mainly is with the variation of EDTA and organic acid concentration the volume of activation of heavy metal element in the compost to be produced main influence in handling.The activation effect of heavy metal element is along with the rising of EDTA and organic acid concentration increases in the compost, and though whether the processing of ammonium sulfate is arranged, between 2 kinds of different EDTA concentration of treatment, the volume of activation of heavy metal there are significantly (p＜0.05) and extremely remarkable (p＜0.01) difference.In the 6 heavy metal species elements measured of test, use the processing of ammonium sulfate not remarkable separately, and ammonium sulfate and EDTA effect are also not obvious, even in activation, show the negative interaction of processing Zn to its activation effect; Simultaneously in the two kinds of elements of Cu, Zn and Cd and two kinds of elements of Pb under the oxalic acid treatment under citric acid treatment, reduce the volume of activation that contrasts with distilled water when the volume of activation of above-mentioned element is on the contrary than using organic acid singly in processing and remain on same level, shown the negative interaction that ammonium sulfate is handled, but in the oxysuccinic acid of ammonium sulfate and 100mmol/L and oxalic acid treatment respectively to compost in the activation effect of Pb and elements such as Zn, Cu, Ni show the promoter action of ammonium sulfate.Therefore, in carrying out EDTA and organic acid activation treatment, should consider to use kind, the working concentration of sequestrant comprehensively and whether add ammonium sulfate association and handle consumer garbage compost.
The percentage ratio of handling heavy metallic activation behind the compost from EDTA and organic acid as can be seen, after handling, the concentration of test design can significantly improve the volume of activation of heavy metal element, just overall activation effect, EDTA and 3 kinds of strong and weak orders of organic acid activation effect are EDTA＞citric acid＞oxysuccinic acid＞oxalic acid.Citric acid is the strongest acid of sequestering power in the small molecular organic acid, but test-results shows: the organic acid sequestering power and to the volume of activation of heavy metal element all less than EDTA, in leaching to Pb and Cd, each low molecular organic acids ability size order is citric acid＞tartrate＞oxalic acid, the desorb of Cu is citric acid＞oxalic acid＞tartrate in proper order, and the desorb of Zn is tartrate＞citric acid＞oxalic acid in proper order.Also as can be seen, Cu in the compost and Zn element are comparatively active from the result of activation percentage ratio, are easier to be activated, and this just points out us at the stripping and the branch problem that activate, will consider during leaching treating refuse compost these two kinds of elements.Because the activation effect of heavy metal element clearly during use sequestrant EDTA or organic acid were handled, therefore we will consider the recovery of leaching liquor and handle problems after carrying out activation treatment, when repairing consumer garbage compost, can prevent the generation of secondary pollution effectively, avoid underground water and lower soil are polluted.
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 (3)
1. an ammonium sulfate mixed liquor is characterized in that described ammonium sulfate mixed liquor is: ammonium sulfate and EDTA or ammonium sulfate and organic acid or ammonium sulfate and EDTA and organic acid; Wherein:
(1) ammonium sulfate: EDTA is 1g/L (NH
4)
2SO
4: 50-100mmol/L EDTA;
(2) ammonium sulfate: organic acid is 1g/L (NH
4)
2SO
4: the 50-100mmol/L organic acid;
(3) ammonium sulfate: EDTA: organic acid is 1g/L (NH
4)
2SO
4: 50-100mmol/L EDTA: 50-100mmol/L organic acid;
Wherein the organic acid of step (2), (3) is oxysuccinic acid, citric acid or oxalic acid.
2. ammonium sulfate mixed liquor as claimed in claim 1, wherein the weightmeasurement ratio of ammonium sulfate: EDTA is 1: 0.01-0.03; Ammonium sulfate: the organic acid weightmeasurement ratio is 1: 0.01-0.03; Ammonium sulfate: EDTA: the organic acid weightmeasurement ratio is 1: 0.01-0.03: 1-3.
3. method that adopts the described ammonium sulfate mixed liquor of claim 1 to prepare activating heavy metals in domestic waste composts, it is undertaken by following step:
(1) will contain the consumer garbage compost of heavy metal contamination, the sorting of sieving, natural air drying grinds, and sieves, and is standby;
(2) with standby consumer garbage compost and different ammonium sulfate mixed liquors with 1: the 10-15 parts by weight are leaching 2-3h respectively;
(3) collect the compost eluent solution then respectively, filter, carry out
Change processing, measure the content of heavy metal Cd, Cr, Cu, Ni, Pb, Zn in the solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100695739A CN101597181B (en) | 2009-07-06 | 2009-07-06 | Method for activating heavy metals in domestic waste composts by utilizing ammonium sulfate mixed liquor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100695739A CN101597181B (en) | 2009-07-06 | 2009-07-06 | Method for activating heavy metals in domestic waste composts by utilizing ammonium sulfate mixed liquor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101597181A CN101597181A (en) | 2009-12-09 |
| CN101597181B true CN101597181B (en) | 2011-08-10 |
Family
ID=41418806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100695739A Expired - Fee Related CN101597181B (en) | 2009-07-06 | 2009-07-06 | Method for activating heavy metals in domestic waste composts by utilizing ammonium sulfate mixed liquor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101597181B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102068783B (en) * | 2011-01-25 | 2012-03-28 | 浙江工商大学 | Stabilization agent for solid waste incineration ash and preparation method thereof |
| CN102617199B (en) * | 2012-04-06 | 2013-07-17 | 东北农业大学 | Preparation method for straw-decomposing agent capable of reducing heavy metal pollution |
| CN102630394B (en) * | 2012-05-04 | 2013-11-20 | 天津师范大学 | Method for adjusting temperature in leaching and repairing heavy metal of waste compost |
| CN106068742A (en) * | 2016-06-21 | 2016-11-09 | 天津师范大学 | A kind of method using Graphene to fix lawn composting substrate heavy metal |
| CN106631402A (en) * | 2016-12-07 | 2017-05-10 | 广西南宁科茂企业信息咨询有限公司 | Household garbage treatment method |
| CN107473847A (en) * | 2017-09-19 | 2017-12-15 | 南京仙草堂生物科技有限公司 | A kind of biological organic fertilizer for improving Cadmium Pollution in Soils |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1872802A (en) * | 2006-06-23 | 2006-12-06 | 天津师范大学 | Eluate for compost of domestic waste of city, preprtion method and application |
-
2009
- 2009-07-06 CN CN2009100695739A patent/CN101597181B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1872802A (en) * | 2006-06-23 | 2006-12-06 | 天津师范大学 | Eluate for compost of domestic waste of city, preprtion method and application |
Non-Patent Citations (9)
| Title |
|---|
| 多立安 |
| 多立安.EDTA对一年生黑麦草种子萌发及幼苗生长的影响.《黑龙江畜牧兽医》.2007,(第12期),62-64. |
| 多立安;廉菲;赵树兰;滕萌;王礼莉;高玉葆.生活垃圾堆肥淋洗液培植无土草皮的生态特征.《生态学报》.2007,第27卷(第12期),5050-5056. * |
| 廉菲 |
| 廉菲;赵树兰;滕萌;多立安.EDTA对一年生黑麦草种子萌发及幼苗生长的影响.《黑龙江畜牧兽医》.2007,(第12期),62-64. * |
| 滕萌 |
| 王礼莉 |
| 赵树兰 |
| 高玉葆.生活垃圾堆肥淋洗液培植无土草皮的生态特征.《生态学报》.2007,第27卷(第12期),5050-5056. |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101597181A (en) | 2009-12-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Liu et al. | Phytostabilisation potential of giant reed for metals contaminated soil modified with complex organic fertiliser and fly ash: a field experiment | |
| Chu et al. | Sewage sludge-derived hydrochar that inhibits ammonia volatilization, improves soil nitrogen retention and rice nitrogen utilization | |
| Kos et al. | Phytoextraction of lead, zinc and cadmium from soil by selected plants | |
| Paré et al. | Extractability of trace metals during co-composting of biosolids and municipal solid wastes | |
| CN101597181B (en) | Method for activating heavy metals in domestic waste composts by utilizing ammonium sulfate mixed liquor | |
| Qingyun et al. | Influence of long-term fertilization on selenium accumulation in soil and uptake by crops | |
| CN106800939A (en) | Renovation agent and preparation method thereof for administering soil heavy metal combined pollution | |
| Wang et al. | Evaluation of silkworm excrement and mushroom dreg for the remediation of multiple heavy metal/metalloid contaminated soil using pakchoi | |
| Wei et al. | Effect of different nitrogenous nutrients on the cadmium hyperaccumulation efficiency of Rorippa globosa (Turcz.) Thell. | |
| CN101597182B (en) | Application of ammonium sulfate mixed liquor in extracting heavy metals from waste composts with lawn plants | |
| Wang et al. | Production of artificial humic acid from rice straw for fertilizer production and soil improvement | |
| Anthonio et al. | Impact of long-term fertilization on phosphorus fractions and manganese oxide with their interactions in paddy soil aggregates | |
| Xu et al. | The process of biotransformation can produce insect protein and promote the effective inactivation of heavy metals | |
| Wei et al. | Potential of Taraxacum mongolicum Hand-Mazz for accelerating phytoextraction of cadmium in combination with eco-friendly amendments | |
| Meers et al. | The potential of foliar treatments for enhanced phytoextraction of heavy metals from contaminated soil | |
| CN101597186B (en) | Method for removing heavy metals from waste compost by united elution by ammonium sulfate and malonic acid | |
| CN102626032A (en) | Method adopting ryegrass and nitrilotriacetic acid (NTA) to restore heavy metal of compost leacheate | |
| Jiang et al. | Recycling of chemical eluent and soil improvement after leaching | |
| Kroulíková et al. | Combined effects of carbonaceous-immobilizing agents and subsequent sulphur application on maize phytoextraction efficiency in highly contaminated soil | |
| CN114713624B (en) | method for promoting cash crop castor to repair copper and cadmium combined polluted soil | |
| Wang et al. | Organic Materials Could Improve the Phytoremediation Efficiency of Soil Potentially Hazardous Metal by Sedum alfredii Hance. | |
| Ali et al. | Comparative assessment of phytoavailable cadmium by using various extractants in texturally different contaminated soils during the growth of maize crop. | |
| Francis et al. | In-situ phytoremediation of arsenic from contaminated soil | |
| Doughmi et al. | Characterization and bioavailability of metallic trace elements in different organic waste | |
| Spiak et al. | Usefulness of selected mineral wastes for reclamation of copper industry dumping site |
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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110810 Termination date: 20120706 |