CN107309260A - Application and restorative procedure of the environmental protection ferment in terms of heavy-metal contaminated soil reparation - Google Patents
Application and restorative procedure of the environmental protection ferment in terms of heavy-metal contaminated soil reparation Download PDFInfo
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- CN107309260A CN107309260A CN201710636743.1A CN201710636743A CN107309260A CN 107309260 A CN107309260 A CN 107309260A CN 201710636743 A CN201710636743 A CN 201710636743A CN 107309260 A CN107309260 A CN 107309260A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/02—Extraction using liquids, e.g. washing, leaching, flotation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
Abstract
The invention discloses application of the environmental protection ferment in terms of heavy-metal contaminated soil reparation and restorative procedure.The environmental protection ferment is formed by rubbish from cooking, water and carbohydrate mixed fermentation, and the rubbish from cooking is made up of following percentage by weight raw material：Fruit 40%~80%, vegetables 20%~60%, leaves of plants 0~30%.The restorative procedure comprises the following steps：S1. environmental protection ferment stoste is prepared；S2. washed off soil removal of impurities will be treated, will be sieved, while analyzing its content of beary metal；S3. elute：Enzyme stoste is pressed 1:Eluted after 0~100 dilution proportion as acid eluent：When it is industrial soil to repair object, separation of solid and liquid after mixing completely, reclaiming clean waste liquid is reused；When it is agricultural land soil to repair object, after plough loosens the soil, plus eluent was soaked after a couple of days, is collected leacheate in discharge outlet, is also allowed part eluent with heavy metal transformation to plough sole.The present invention has the advantages that cost is low, recycle is used again, operational administrative is simple, repairing efficiency is short, non-secondary pollution.
Description
Technical field
The invention belongs to remediation of heavy metal-contaminated soil field in environmental protection technical field, more particularly, to
Application and heavy-metal contaminated soil restorative procedure of a kind of environmental protection ferment in terms of heavy-metal contaminated soil reparation, including metal
Smelting processing, the soil remediation of metal mine contaminated site and contaminated by heavy metals agricultural land soil reparation.
Background technology
Environmental protection ferment (also referred to as rubbish ferment, Garbage Enzyme), is by the founder of Organic Agriculture in Thailand association
Happy element elder brother doctor Pu Panweng (Dr.Rosukon Poompanvong) was successfully developed by experiment for many years in 2006.
Specifically, kitchen garbage, brown sugar and water are pressed 3：1：It is placed in after 10 ratio mixing in sealed plasthetic container, container cover is revolved
Tightly, placed 3 months in place of the cool place of air circulation, a 1st month interval, which is uncapped, to be deflated and stir frequently, is filtered after 3 months
The supernatant fraction arrived as environmental protection ferment.Vegetable and fruit (such as vegetable leaf, turnip, dish tail, dish root, pericarp in rubbish from cooking
Deng) and the leaf of gardens pruning, weeds can be adopted to do environmental protection ferment.It is by the rubbish from cooking of green plant class to prepare environmental protection ferment
A kind of critically important mode of recycling.The ferment rich in comprehensive plant enzyme, mineral matter, nutriment, alcohol, low point
The compositions such as son amount organic acid, both can be used as home washings, antiphlogistic antibacterial and deinsectization auxiliary agent, liquid can be also used as in farming and animal husbandry
Fertilizer, for improving all many-sides such as culture environment of aquatic products.Moreover, after the ferment slag being filtrated to get is dried, blending and being embedded in soil
In, fertilizer is can be used as, manure pit can be purified by adding in closestool.Happy element doctor elder brother is in order to change the present situation of global pollution, by environmentally friendly ferment
The preparation method of element is gratis to public propagation.After this preparation method wideling popularize through non-government environmental protection organization, absolutely mostly
Number is made so that family relation is scattered.But be due to every family raw material it is varied, material rate is also various,
So the environmental protection ferment made differs widely to the treatment effect of pollution.And due to needing addition substantial amounts of when making
Water, therefore the yield of the environmental protection ferment is larger, it is necessary to seek rational Application way.
In addition, in order to adapt to China's rapid development of economy after reform and opening-up, metal mine exploitation and smelting and processing of metals
Industry develops expansion rapidly, and the disposal of pollutants of these industries make it that the soil pollution on industry and mining place and its periphery is increasingly serious,
And the quickening of urbanization process further accelerates the secondary development and utilization of these contaminated soils.Due to heavy metal pollution
, can directly or indirectly polluted surface water, underground water, air and plant with features such as chronicity, disguised and irreversibilities
Thing, or even the health and life of the mankind are endangered, therefore, these places are effectively repaired before exploitation, two are ensured
The security of secondary exploitation is highly desirable to；Because the contaminated by heavy metals agricultural land soil of many reasons for grain can
Continue safety supply to be also required to carry out in-situ immobilization.Related research is that recent decades difficult point both domestic and external and focus environment are asked
Topic.
Pass through in-situ immobilization or different mainly using relatively conventional physics, chemistry and biological renovation method both at home and abroad at present
The method that position is repaired is repaired to contaminated soil.Peripheral doses are suitable for repairing the Polluted Soil that pollution concentration is high, area is small
Earth, but soil texture is easily destroyed, quantities is big, energy consumption is big, costly, with larger limitation；It is biological prosthetic to drop
The migration of low heavy metal in the environment, but repairing efficiency is long, is vulnerable to the limitation of weather, geological conditions and soil types etc.；
Chemical remediation is, by adding curing agent, organic matter, chemical agent etc. into soil, to pass through absorption, redox and precipitation etc.
Effect, to reduce the biological effectiveness of heavy metal, but is easily destroyed soil texture, and consumption of chemical agent is big, costly, only
Suitable for the less soil remediation of seriously polluted and area.
Soil leaching is to utilize to elute reagent flushing soil, is acted on by ion exchange, precipitation, absorption and chelating etc.,
Heavy metal or organic matter in solid phase of soil are transferred in liquid phase of soil, then the leacheate containing heavy metal or organic matter is entered one
Step processing, and cycling elution liquid.Soil leaching process spreads including leacheate to soil surface, the dissolving to polluter, drench
The pollutant of wash-off the process such as spreads in soil diffusion inside, the pollutant eluted from soil surface to fluid.Soil leaching
It can be divided into elution in situ and dystopy elution by contaminated site, wherein, soil in-situ elution is mainly according to the spy of pollutant distribution
Point, using external force or leacheate self gravitation, flows it through contaminated soil, and is collected and elimination pouring using artificial water source's device
Washing lotion, carries out soil remediation.Soil in-situ elution need at contaminated site scene to set up elution device, it is necessary to using physics every
Enclosed experiment region is carried out from measure, while being also required to collect leachates progress harmless treatment.Soil heterotopic elution will be passed through
The pollutant such as heavy metal is innoxious in elution processing in elution equipment of the migration of contaminated soil, contaminated soil, leachates
The process such as recycling of soil after processing, processing.Soil leaching recovery technique technique is simple, repairing effect is stable thoroughly, week
Phase is short and high to the remediation efficiency of high density pollution soil, thus is increasingly taken seriously, and American-European countries has carried out largely
Contaminated soil elution recovery project, the commercial operations stage is had been enter at present.
In Soil leaching recovery technique, the selection of eluent and the optimization for eluting technique are the important leverages for eluting effect.
Conventional eluent has：Water, acid (HCl/ citric acids/tartaric acid/oxalic acid), salting liquid (ammonium nitrate/ammonium dihydrogen phosphate/oxalic acid
Ammonium/CaCl2), chelating agent (EDTA/DTPA/EDDS/NTA), surfactant (saponin/Sha Fanting/rhamnolipid/sophorolipid/
Cyclodextrin etc.) etc. several major classes and their complex reagent.Wherein, inorganic acid solution can cause change and the soil of soil pH value
The decline of fertility, and it is difficult regeneration；Artificial chelating agent and artificially synthesised surfactant is expensive, biodegradation
Property is poor, easily causes secondary pollution；Biosurfactant is easily biodegradable, but is yielded poorly.
The content of the invention
The technical problem to be solved in the present invention is the defect and deficiency for overcoming above-mentioned existing chemical leaching technology, for weight
The problem of there is secondary pollution and high cost in the elution reparation of metallic pollution soil is there is provided a kind of environmental protection ferment in elution weight
Application in terms of metallic pollution soil.Compared to conventional chemical leaching technology, the present invention is to make full use of rubbish from cooking to ferment
Into environmental protection ferment as organic acid eluent, on the one hand these environmental protection ferments can play elution high concentration heavy metal pollution
The advantage of the various heavy such as Cd, Zn, Pb, Cu, Mn, Ni, Hg and As in soil, while heavy metal contaminated soil has again
Benefit, makes the high concentration heavy-metal contaminated soil for being difficult to repair be recovered rapidly, realizes quick, efficient, low cost, without secondary
The green soil elution of pollution is repaired.
It is a further object of the present invention to provide a kind of method of utilization environmental protection ferment restoration of soil polluted by heavy metal.
Above-mentioned purpose of the present invention is achieved through the following technical solutions：
Application of the environmental protection ferment in terms of heavy-metal contaminated soil reparation.Specifically refer to environmental protection ferment as or system
Application in terms of standby heavy-metal contaminated soil reparation eluent.
Preferably, the environmental protection ferment is as the eluent for promoting heavy-metal contaminated soil to repair, and the eluent is logical
Cross and form rubbish from cooking, water and carbohydrate mixed fermentation.
Preferably, water, rubbish from cooking, the weight of carbohydrate ratio are 9~11：2.5~3.5：1.
Preferably, in terms of the environmental protection ferment is applied to the industrial sites soil of elution repairing heavy metal pollution.
Preferably, the heavy metal is the one or more in cadmium, zinc, copper, lead, manganese, nickel, mercury and arsenic.
Preferably, the rubbish from cooking is to comprise the following raw materials by weight percent：Fruit 40%~80%, vegetables
20~60%, leaves of plants 0~30%.
It is highly preferred that the rubbish from cooking is to comprise the following raw materials by weight percent：Fruit 40%~80%, vegetable
Dish 20~60%.
It is highly preferred that one or more of the fruit in orange, lemon, apple, peach, muskmelon, banana；Institute
State one or more of the vegetables in leaf vegetables, root tuber class or fruit type vegetables；The leaves of plants is selected from orange leaf, jade
One or more in the leaf that meter Ye, afforestation are trimmed.
Preferably, the carbohydrate is brown sugar.
It is a kind of to elute the eluent repaired for heavy-metal contaminated soil, it is by rubbish from cooking, water and carbohydrate mixed fermentation
Environmental protection ferment.
Preferably, water, rubbish from cooking, the volume ratio of carbohydrate are 9~11：2.5~3.5：1.
Preferably, the rubbish from cooking is to comprise the following raw materials by weight percent：Fruit 40%~80%, vegetables
20~60%, leaves of plants 0~30%.
It is highly preferred that one or more of the fruit in orange, lemon, apple, peach, muskmelon, banana；Institute
State one or more of the vegetables in leaf vegetables, root tuber class or fruit type vegetables；The leaves of plants is selected from orange leaf, jade
One or more in the leaf that meter Ye, afforestation are trimmed.
Preferably, the carbohydrate is brown sugar.
A kind of method that utilization environmental protection ferment elutes restoration of soil polluted by heavy metal, is with 1:0~100 dilution proportion
Environmental protection ferment be elution reparation that acid eluent carries out heavy-metal contaminated soil.
Specifically, the method for eluting restoration of soil polluted by heavy metal using environmental protection ferment comprises the following steps：
S1. will heavy-metal contaminated soil removal of impurities be eluted, screening, while analyzing the content of beary metal of soil；
S2. above-mentioned eluent (environmental protection ferment) adds water by 1:0~100 dilution proportion, obtains acid eluent；
S3. elute：According to heavy metal content in soil, enzyme stoste is pressed 1:Acid pouring is used as after 0~100 dilution proportion
Lotion is eluted.
ELUTION METHOD described in step S3 is：When it is industrial pollution soil to repair object, the soil excavated is broken
Mixed completely with eluent stirring after broken, being then centrifuged for or vacuumizing separates acid eluent and heavy-metal contaminated soil, Gu
After liquid separation is finished, recycling purification is carried out to the waste liquid of collection, the waste liquid after purification is recycled again；When
Repair object be farmland pollution soil when, after turn plow loosens the soil, plus dilution after eluent immersion a few days after, discharge outlet receive
Collect leacheate, also allow part eluent with heavy metal transformation to plough sole.
Determined as the extension rate of enzyme stoste according to actual heavy metal in soil pollution level to be repaired：For
Moderate and the soil of serious pollution directly with enzyme stoste as acid eluent, and for slight and slight pollution then by ferment
Plain stoste is used after diluting 100 times as acid eluent.Wherein, the standard of heavy metal pollution of soil degree is with reference to this area
Conventional criteria, such as《Standard of soil environment quality》GB 15618-1995：Content of beary metal, not less than evaluation criterion, is no dirt
Dye；It is light contamination between 1 times to 2 times (containing)；It is slight pollution between 2 times to 3 times (containing)；3 times to 5 times
It is intermediate pollution between (containing)；More than 5 times, be serious pollution.
Preferably, when heavy-metal contaminated soil elution reparation is carried out to industrial pollution soil, the eluent described in step S1
The ratio added water is 1：0, i.e., acid eluent is environmental protection ferment stoste.
Preferably, the solid-to-liquid ratio in step S3 is 1g：20~60mL.
Preferably, the elution time in step S3 is 1~8h (preferably 4~8h).
Preferably, the elution temperature in step S3 is 15~35 DEG C.
Preferably, the heavy metal is the one or more in cadmium, zinc, copper, lead, manganese, nickel, mercury and arsenic.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, the environmental protection ferment that the present invention makes full use of rubbish from cooking to ferment repairs a huge sum of money as organic acid eluent
Belong to contaminated soil so that heavy metal is easier to be dissolved in organic acid rather than continued absorption in soil surface, and elution effect shows
Write, and the biological degradability of the environmental protection ferment is good, does not result in secondary pollution, can also increase the fertilizer efficiency of soil after elution
With its soil texture of improvement, make the Soil Utilization rate after processing bigger；
2nd, environmental protection ferment of the invention is respectively provided with elution effect to various heavy, effectively can remove in contaminated soil
The various heavies such as Cd, Zn, Pb, Cu, Mn, Ni, Hg and As, substantially increase the remediation efficiency of heavy-metal contaminated soil；Suitably
Large area by the industrial sites soil of high concentration heavy metal pollution processing reparation, with rehabilitation cost is low and repairing efficiency is short
Advantage；
3rd, have that preparation method is simple, raw material is cheap and easily-available, operational administrative using this method elution heavy-metal contaminated soil
Simply, environmentally friendly the features such as.
Brief description of the drawings
Fig. 1 for environmental protection ferment influence of the different thinner ratios to Cd elution efficiency.
Fig. 2 for environmental protection ferment influence of the different thinner ratios to Zn elution efficiency.
Fig. 3 for environmental protection ferment influence of the different thinner ratios to Cu elution efficiency.
Fig. 4 for environmental protection ferment influence of the different thinner ratios to Pb elution efficiency.
Fig. 5 for environmental protection ferment influence of the different thinner ratios to Mn elution efficiency.
Fig. 6 is influence (with the lactic acid of 1/100 thinner ratio compareed) of the different elution times to Cd, Zn elution efficiency.
Fig. 7 is influence (with the lactic acid of 1/100 thinner ratio compareed) of the different elution times to Pb, Mn elution efficiency.
Influences of the Fig. 8 for different elution solid-to-liquid ratios (environmental protection ferment dosage) to Cd elution efficiency.
Influences of the Fig. 9 for different elution solid-to-liquid ratios (environmental protection ferment dosage) to Zn elution efficiency.
Influences of the Figure 10 for different elution solid-to-liquid ratios (environmental protection ferment dosage) to Cu elution efficiency.
Influences of the Figure 11 for different elution solid-to-liquid ratios (environmental protection ferment dosage) to Pb elution efficiency.
Influences of the Figure 12 for different elution solid-to-liquid ratios (environmental protection ferment dosage) to Mn elution efficiency.
Figure 13 is the Cd elution effects of 4 kinds of different ferment contaminated site soil sample different to 2.
Figure 14 is the Zn elution effects of 4 kinds of different ferment contaminated site soil sample different to 2.
Figure 15 is the Ni elution effects of 4 kinds of different ferment contaminated site soil sample different to 2.
Figure 16 is the Cu elution effects of 4 kinds of different ferment contaminated site soil sample different to 2.
Figure 17 is the Pb elution effects of 4 kinds of different ferment contaminated site soil sample different to 2.
Figure 18 is the Mn elution effects of 4 kinds of different ferment contaminated site soil sample different to 2.
Figure 19 is the Cr elution effects of 4 kinds of different ferment contaminated site soil sample different to 2.
Embodiment
The present invention is further illustrated below in conjunction with Figure of description and specific embodiment, but embodiment is not to this hair
It is bright to limit in any form.Unless stated otherwise, the reagent of the invention used, method and apparatus are conventional for the art
Reagent, method and apparatus.
Unless stated otherwise, following examples agents useful for same and material are purchased in market.
The reparation of the industrial sites heavy-metal contaminated soil of embodiment 1
1st, a kind of eluent of heavy-metal contaminated soil, i.e. environmental protection ferment, are by rubbish from cooking, three kinds of groups of water and brown sugar
Divide and be prepared from；Wherein, rubbish from cooking is made up of the raw material of following weight percents：Fruit 40%, vegetables 50%, leaves of plants
10%：
Wherein one or more of the fruit in orange, lemon, apple, peach, muskmelon, banana；
Wherein one or more of the vegetables in leaf vegetables, root tuber class or fruit type vegetables；
One or more in the leaf that wherein leaves of plants is trimmed selected from orange leaf, maize leaves, afforestation.
2nd, the eluent chooses the raw material for standby of each component respectively according to above-mentioned parts by weight, and its application process includes as follows
Step：
(1) natural acid eluent is prepared：By 40% fruit, 50% vegetables, 10% leaves of plants rubbish from cooking, break
It is by volume water according to the female result of study of Thailand's pleasure element after broken：Rubbish from cooking：Brown sugar=10:3:1, it is placed in sealedly
In fermentation tank, certain space is left in tank, container is covered tightly, the shady and cool part of air circulation is placed on, a 1st month interval is uncapped
Deflate and stir frequently, filtered after 3 months, you can environmental protection ferment stoste is made, eluted this environmental protection ferment stoste as acidity
Agent, it is standby；
(2) by industrial sites heavy-metal contaminated soil removal of impurities to be eluted, screening, and analyze soil Cd, Zn, Pb, Cu,
The content of the heavy metals such as Mn and Ni and the basic physical and chemical of soil；
(3) the acid eluent prepared is added in the heavy-metal contaminated soil to be eluted after the screening of removal of impurities, solid-liquid
Than for 1g:40mL；The complete 6h of mixing is stirred to the heavy-metal contaminated soil to be eluted after sour eluent and removal of impurities screening,
It is 20 DEG C to elute temperature；
(4) promote eluent and heavy-metal contaminated soil to separate using centrifugation or by the way of vacuumizing, obtain after elution
Heavy-metal contaminated soil；
(5) after separation of solid and liquid is finished, recycling purification is carried out to the waste liquid of collection, the waste liquid after purification is carried out again
Recycle.
The reparation of the heavy metal polluted soil of farmland of embodiment 2
1st, a kind of eluent of heavy-metal contaminated soil, i.e. environmental protection ferment, are by rubbish from cooking, three kinds of groups of water and brown sugar
Divide and be prepared from；Wherein, rubbish from cooking is made up of the raw material of following weight percents：Fruit 40%, vegetables 50%, leaves of plants
10%：
Wherein one or more of the fruit in orange, lemon, apple, peach, muskmelon, banana；
Wherein one or more of the vegetables in leaf vegetables, root tuber class or fruit type vegetables；
One or more in the leaf that wherein leaves of plants is trimmed selected from orange leaf, maize leaves, afforestation.
2nd, the eluent chooses the raw material for standby of each component respectively according to above-mentioned parts by weight, and its application process includes as follows
Step：
(1) natural acid eluent is prepared：By 40% fruit, 50% vegetables, 10% leaves of plants rubbish from cooking, break
It is by volume water according to the female result of study of Thailand's pleasure element after broken：Rubbish from cooking：Brown sugar=10:3:1, it is placed in sealedly
In fermentation tank, certain space is left in tank, container is covered tightly, the shady and cool part of air circulation is placed on, a 1st month interval is uncapped
Deflate and stir frequently, filtered after 3 months, you can environmental protection ferment stoste is made, it is standby；
(2) content of beary metal and basic physical and chemical of heavy metal polluted soil of farmland to be eluted are analyzed, according to soil weight
Tenor, 1 is pressed by enzyme stoste:It is standby as acid eluent after 1~100 dilution proportion；
(3) the eluent immersion of step (2) will after the heavy metal polluted soil of farmland turn plow eluted loosens the soil, be added
After a couple of days, leacheate is collected in discharge outlet, part eluent is allowed with heavy metal transformation to plough sole.
Influence of the different thinner ratios of embodiment 3 to elution effect
1st, ELUTION METHOD
The environmental protection ferment made with 50% fruit and 50% vegetables, is diluted with water by different proportion, respectively an elution huge sum of money
Category pollutes very serious industrial sites soil (Cd 106mg/kg, Zn 14430mg/kg, Cu 220 mg/kg, Pb
2371mg/kg, Ni 37.1mg/kg, Mn 2.93g/kg), solid-to-liquid ratio is 1g:3mL, vibration elution 1h, observes different thinner ratios
Influence to eluting effect.
2nd, result is eluted
From Fig. 1 to Fig. 5, when the thinner ratio of environmental protection ferment is 1:When 0~100, the with serious pollution industry of heavy metal
Place Soil leaching effect is preferable, wherein again with environmental protection ferment stoste heavy metal Cd, Zn, Cu, Pb and Mn elution efficiency most
It is good, respectively up to 8.81%, 1.94%, 27%, 9.5% and 25%.But thinner ratio is more than 1:100, elute DeGrain.Institute
So that for polluting very serious soil, eluent preferably is enzyme stoste.
Influence of the different elution times of embodiment 4 to elution effect
1st, ELUTION METHOD
The environmental protection ferment stoste and thinner ratio made respectively using 40% fruit, 30% vegetables and 30% orange leaf is 1:
100 lactic acid are as eluent, by the different elution times, and heavy metal pollution very serious industrial sites soil (Cd is eluted respectively
106mg/kg, Zn 14430mg/kg, Cu 220mg/kg, Pb 2371mg/kg, Ni 37.1 mg/kg, Mn 2.93g/kg), Gu
Liquor ratio is 1g:10mL, observes influence of the different elution times to elution effect.
2nd, result is eluted
As shown in Figure 6 and Figure 7, when the elution time increasing to 4h by 1h, Cd, Zn, Mn washout rate, which have, significantly to be increased
Plus, but for Pb elements, when the elution time increasing to 4h by 1h, its washout rate declines；Increased to when the elution time by 4h
During 8h, Cd, Zn washout rate still have increase, obvious not as simply amplification by 1h when 4h is increased to, for Pb elements,
When the elution time increasing to 8h by 4h, its washout rate is basically unchanged, but for Mn elements, is increased when the elution time by 4h
When being added to 8h, its washout rate is still greatly improved.Therefore, for the elements such as Cd, Zn, Pb, Mn, than better suited
The elution time be 4~8h, and elution the time under the same conditions, the elution efficiency of the present embodiment ferment is substantially better than breast
Acid.
The different solid of embodiment 5 compares the influence of elution effect
1st, ELUTION METHOD
The environmental protection ferment stoste made using 50% fruit and 50% vegetables is eluent, by different solid-to-liquid ratios by environmental protection
Enzyme stoste is mixed with contaminated soil, elute respectively heavy metal pollution very serious industrial sites soil (Cd 106mg/kg,
Zn 14430mg/kg, Cu 220mg/kg, Pb 2371mg/kg, Ni 37.1mg/kg, Mn 2.93g/kg), the elution time is
4h, observation different solid compares the influence of elution effect.
2nd, result is eluted
From Fig. 8 to Figure 12, it is 1g to press solid-to-liquid ratio when environmental protection ferment stoste and contaminated soil:When 20~60mL is mixed,
It is preferable to the elution efficiency of Cd, Zn, Cu, Pb, Mn heavy metal in contaminated soil.
Elution effect of the different ferment of embodiment 6 to different contaminated site soil samples
1st, ELUTION METHOD
(1) matched by 4 kinds of different rubbishes from cooking, by water：Rubbish from cooking：Brown sugar weight ratio is 10：3：1 spontaneous fermentation March
The 4 kinds of environmental protection ferments made, the rubbish from cooking proportioning of this 4 kinds of ferment is shown in Table 1；By 2g soil：The solid-to-liquid ratio of 40mL enzyme stostes is come
Elute 2 content of beary metal difference very big 2 soil samples：Soil sample 2-2 and soil sample 5-2.Wherein, it is wide originally that soil sample 2-2, which is derived from,
State polluted enterprises steel plant place, soil sample 5-2 is derived from the relatively clean water rice soil of Changsha, a huge sum of money for this 2 soil samples
Belong to content as shown in table 2.
The rubbish from cooking proportioning of 1. 4 kinds of ferment of table
Table 2. heavy metal content in soil used and physicochemical property in testing
(2) soil sample is dried, 2mm sieves is crossed after grinding, 2g is weighed respectively and crosses No. 2-2 of 100 mesh sieves, 6 parts of 5-2 soil samples
In plastic centrifuge tube, 40mL environmental protection ferment stostes are added, and elution control treatment is done with pure water, are shaken up, in room temperature condition
Under with 200r/min rotating speed shaking table vibration elution 4h after, 20min is centrifuged with 4000 r/min rotating speed.By supernatant after centrifugation
Filtering, filtrate calculates its washout rate with the content of Atomic Absorption Spectrometry heavy metal.
2nd, result is eluted
As shown in Figure 13-19, in addition to Pb heavy metals, control group and 4 ferment groups are to polluting in lighter paddy rice soil sample
The washout rate of other heavy metals is above the washout rate of steel plant's soil sample of heavy contamination, wherein, compared with ferment group, control
Group shows relatively low elution ability to polluting the heavy metals such as Cd, Zn, Pb, Cu, Mn, Ni, Cr in lighter paddy rice soil sample, and
And control group does not almost work to the elution of the heavy metals such as Cd, Zn, Pb, Cu, Mn in steel plant's soil sample of heavy contamination, but
The washout rate of 4 ferment groups of different rubbishes from cooking proportioning is but all remarkably higher than the washout rate of respective control group, for Cd, Zn,
For the heavy metals such as Pb, Cu, Mn, Ni, Cr, 4 ferment groups show stronger elution ability.
Difference of the elution efficiency difference because eluting element between different ferment groups, some significant differences, some differences are then
It is not notable.Under this experiment condition, for either the rice soil of low stain or the industrial sites of high pollution are native, 4 ferment
Washout rate equal highest of the group to Cd and Mn；And 4 ferment groups are to the Cr in rice soil and industrial sites soil, industrial pollution place
Middle content very high Zn washout rate is relatively low, but the Zn total amounts eluted are that comparison is high.
Ferment group is flat to the Pb/Cd/Ni/Zn/Cu/Mn/Cr's of the rice soil of low stain and the industrial sites of high pollution soil
Equal washout rate is respectively 2.05%~7.85% and 8.37%~14.58%, 60.81%~74.29% and 43.06%~
58.82%th, 6.78%~10.87% and 3.91%~5.36%, 18.31%~28.61% and 0.26%~0.43%,
11.48%~16.70% and 3.67%~6.92%, 33.74%~39.78% and 12.78%~17.23%, 1.22%~
2.21% and 0.64%~1.55%.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to recognized
The specific implementation of the fixed present invention is confined to these explanations.For general technical staff of the technical field of the invention,
Without departing from the inventive concept of the premise, some simple deduction or replace can also be made, the present invention should be all considered as belonging to
Protection domain.
Claims (10)
1. application of the environmental protection ferment in terms of heavy-metal contaminated soil reparation.
2. application according to claim 1, it is characterised in that refer to environmental protection ferment as or prepare heavy metal polluted soil
Application in terms of the eluent that earth is repaired.
3. application according to claim 1 or 2, it is characterised in that the environmental protection ferment is mixed by rubbish from cooking, water and carbohydrate
Fermentation is closed to form.
4. application according to claim 3, it is characterised in that water, rubbish from cooking, the weight of carbohydrate ratio are 9~11：2.5
~3.5：1.
5. application according to claim 1 or 2, it is characterised in that the heavy metal is cadmium, zinc, copper, lead, manganese, nickel, mercury
With the one or more in arsenic.
6. the application according to claim 3 or 4, it is characterised in that the rubbish from cooking is by following percentage by weight
Raw material is constituted：Fruit 40%~80%, vegetables 20%~60%, leaves of plants 0~30%.
7. application according to claim 6, it is characterised in that the fruit is selected from orange, lemon, apple, peach, perfume (or spice)
One or more in melon, banana；One or more of the vegetables in leaf vegetables, root tuber class or fruit type vegetables；Institute
State one or more of the leaves of plants in orange leaf, maize leaves, the leaf of afforestation trimming.
8. a kind of elute the eluent repaired for heavy-metal contaminated soil, it is characterised in that is by rubbish from cooking, water and carbohydrate
The environmental protection ferment of mixed fermentation.
9. eluent according to claim 8, it is characterised in that water, rubbish from cooking, the weight of carbohydrate ratio are 9~11：
2.5~3.5：1.
10. a kind of method that utilization environmental protection ferment elutes restoration of soil polluted by heavy metal, it is characterised in that with 1:0~100 ratio
Environmental protection ferment described in the claim 8 of example dilution is the elution reparation that acid eluent carries out heavy-metal contaminated soil.
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