CN101428868A - Restoration agent for groundwater pollution of refuse landfill and restoration method - Google Patents
Restoration agent for groundwater pollution of refuse landfill and restoration method Download PDFInfo
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- CN101428868A CN101428868A CNA2007101652996A CN200710165299A CN101428868A CN 101428868 A CN101428868 A CN 101428868A CN A2007101652996 A CNA2007101652996 A CN A2007101652996A CN 200710165299 A CN200710165299 A CN 200710165299A CN 101428868 A CN101428868 A CN 101428868A
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Abstract
The invention relates to a repairing agent against the groundwater pollution of a landfill, and a method for repairing the groundwater pollution of the landfill. The method solves the problems of high cost and complex operation in the prior method for repairing the groundwater pollution of the landfill. The groundwater pollution repairing agent of the landfill comprises the components of active carbon, zeolite, porcelain granules and zero-valent iron with the content being 15% to 20%, 20% to 40%, 20% to 25% and 20% to 40% respectively. A material serving the function of sewage permeation is arranged to form a hollow wall; the hollow wall body is landfilled with the repairing agent of the invention; and then, the wall body is vertically arranged at the targeted pollution ground so as to repair the groundwater. The removal rates of CODCr and NH<+>4-N are 75% to 80% and 80% to 98% respectively, thereby ensuring the good effect. By adopting the repairing agent to control the groundwater pollution of the landfill, better effect can be achieved, and the invention has the advantages of low cost, easy operation, short repairing cycle, high activity and wide applicable range.
Description
Technical field
The method that the present invention relates to a kind of groundwater pollution of refuse landfill renovation agent and repair rubbish landfill yard groundwater pollution belongs to groundwater pollution improvement field in the environment protection.
Background technology
Along with the raising of Economic development and people's living standard, urban population sharply increases, and city quantity and scale constantly increase, and the municipal wastes amount increases year by year, and many cities have formed the serious situation in " rubbish encirclement city ".The garbage loading embeading method is domestic and international widely used processing and the method for disposing municipal wastes at present.The treatment of urban garbage of China mostly is open-air accumulation or simple and easy landfill, and this unreasonable disposal that does not add safeguard procedures for a long time causes percolate to phreatic severe contamination.The many good water sources of China are because infiltrating of percolate can't continue to drink again, and this produces serious risk to HUMAN HEALTH at present, and China just deficient to the script water resources has caused great threat.
Groundwater pollution has become an outstanding environmental problem of the world today.The polluted underground water problem of percolate has become one of focus environmental problem of paying close attention in the world.China surpasses 40% rivers and creeks and 50% urban groundwater is polluted
[1]The protection groundwater resource are very urgent with the contaminated underground water of improvement.The characteristics that phreatic pollution has disguise and is difficult to reverse, in case contaminated, just be difficult to administer.In economically developed western countries, usually adopt methods such as extraction-facture (pump-and-treat), biological restoration that polluted underground water is administered, but these methods have construction, operation, handling cost height, the cycle of operation is long, shortcomings such as it is big to consume energy can not be widely used.Therefore the experts and scholars of various countries replace these traditional methods in the effective more economically treatment process of research and development in recent years, have also obtained some gratifying achievements simultaneously, and wherein in the waterbearing stratum PRB being installed is a kind of method that has development potentiality most
[2]Traditional PRB is many to repair hydrochloric ether and heavy metal contamination underground water with the Zero-valent Iron for the principal reaction medium, is widely used in control and removes the place pollution in American-European countries, and the filled media of use is varied.Yet this technology is at the early-stage in China.
In conjunction with the present situation of domestic garbage loading embeading, there be not percolate to reclaim and the landfill yard of treatment facility is set up PRB on every side and repaired the underground water that is polluted by percolate and have feasibility.Selecting effective medium and proportioning is to use the key of PRB technical finesse percolate polluted underground water.This research is removed the effect that percolate pollutes by analysis of experiments PRB technology to the suitability and the various filled media of the groundwater treatment of percolate pollution, and percolate pollutes control and improvement provides theoretical foundation and reference in order to carry out.This has higher using value in the percolate from garbage filling field treating processes, for solving percolate to phreatic secondary pollution problem, effectively protect our living environment significant.
Summary of the invention
The objective of the invention is to have the cost height, easily cause the problem of secondary pollution and complicated operation in order to solve present groundwater pollution of refuse landfill restorative procedure, is the method for the groundwater pollution of refuse landfill reaction renovation agent reparation refuse landfill polluted underground water of raw material with gac, zeolite, haydite and zeroth order iron powder and provide a kind of.The present invention is that the groundwater pollution of refuse landfill renovation agent of raw material is made up of gac, zeolite, haydite and zeroth order iron powder with gac, zeolite, haydite and zeroth order iron powder; Wherein gac account for gross weight 16～19%, zeolite account for gross weight 25～35%, haydite account for gross weight 21～24%, the zeroth order iron powder accounts for 25～35% of gross weight.
The raw materials used character of the present invention is as follows: the particle diameter of gac is 0.45mm～0.9mm, zeolite particle diameter 0.15mm～0.45mm, and haydite powder footpath is less than 0.15mm, and the particle diameter of zeroth order iron powder is 0.15mm, and its physicochemical property see the following form.
Table 1 gac physical and chemical index
The table 2 experiment chemical ingredients of zeolite
The table 3 experiment physical and chemical index of zeolite
The chemical property of table 4 haydite
The physical and chemical index of table 5 haydite
The heavy-metal contaminated soil renovation agent that the present invention obtains is a solid.
Advantage of the present invention: permeable reactive barrier essence is a dependent response district that is filled with the active reaction medium, contain the material that to remove pollutent in the body of wall, the permeable reactive barrier generally is installed in the underground reservoir, direction perpendicular to groundwater flow, when under the effect of underground current in hydraulic gradient during by the permeable reactive barrier wherein reaction medium by chemistry or biological respinse pollutent is transformed or dams, this method has that installation is convenient, cheap, repairing effect is better, not destroying the advantage of ecotope, is the developing direction of underground water recovery technique.More American-European developed countries have carried out a large amount of tests and engineering and technological research to it, China starts late to this Study on Technology, still be in the test stage of fumbling at present, rig-site utilization is still blank, the experimental study of this method is also only laid particular emphasis on the processing of organic chloride, to the rich NH of refuse landfill
+ 4-N polluted underground water is handled less, and during the permeable reactive barrier was used, reaction medium cost and usefulness were key problems,
Because the target stains properties is different with pollution level, required mechanism and anti-material are also different when carrying out in-situ treatment.Reaction material can be divided into and pollutent generation chemical reaction, thereby decomposing pollutant is converted into to human body and component environmentally friendly or that harm is lighter it; Another kind of then is by pollutent is transferred to solid particles surface from solution, mainly is by adsorption.For the reduction expense, reaction material should be difficult for dissolving or consume in reaction.In a word, reaction material should meet the following conditions: target contaminant is had selective reaction; Ecological friendly, the toxicological harmless effect; Antibiont is degraded, the life-span is long; Be easy to get, with low cost, the present invention selects gac, zeolite, haydite and zeroth order iron powder for use, with adsorption and chemical reaction reasonable combination, make it be issued to good treatment effect and big range of application by suitable proportion, improve its application flexibility in the reasonable cost prerequisite.
The present invention of present method compares with other groundwater pollution of refuse landfill restorative procedure has following characteristics and advantage: 1) raw material is easy to get, and configurator is simple, and is easy to operate; 2) synthetic filter, absorption and chemical reaction, treatment effect is good; 3) combine with the reparation of permeable reactive barrier original position, simple to operate, with low cost; 4) pollute feature according to difference, can improve treatment effect by adjusting medium size composition, applied widely.
Novel medium permeability barrier treating refuse landfill yard groundwater pollution of the present invention is easy to use, and control expense is low, repairing efficiency short, non-secondary pollution, has a extensive future.
It is low that the present invention has a cost, and non-secondary pollution is simple to operate, and repairing efficiency is short, active strong, and advantage applied widely is simplified the groundwater pollution of refuse landfill repair procedure, reduces rehabilitation cost, the quality of increasing water quality.
Description of drawings
Accompanying drawing 1 embodiment of the present invention synoptic diagram
The CODCr clearance change curve of accompanying drawing 2 reactor A and D
The ammonia nitrogen removal frank change curve of accompanying drawing 3 reactor A and D
Embodiment
The groundwater pollution of refuse landfill renovation agent is a raw material with gac, zeolite, haydite and zeroth order iron powder in the present embodiment, is made up of gac, zeolite, haydite and zeroth order iron powder; The groundwater pollution of refuse landfill renovation agent in pelletized form, adsorbable, the reduction water pollutant, the toxicological harmless effect.
Embodiment one: in the present embodiment in the groundwater pollution of refuse landfill renovation agent, gac accounts for gross weight 15%, zeolite and accounts for that gross weight 20%, haydite account for gross weight 20%, the zeroth order iron powder accounts for gross weight 20%.
Embodiment two: in the present embodiment in the groundwater pollution of refuse landfill renovation agent, gac account for gross weight 19%, zeolite account for gross weight 35%, haydite account for gross weight 24%, the zeroth order iron powder accounts for 35% of gross weight.
Embodiment three: in the present embodiment in the groundwater pollution of refuse landfill renovation agent, in gac account for gross weight 17.5%, zeolite account for gross weight 30%, haydite account for gross weight 22.5%, the zeroth order iron powder accounts for 30% of gross weight.
Embodiment four: embodiment one described a kind of groundwater pollution of refuse landfill renovation agent, it is characterized in that feedstock property is as follows: the particle diameter of gac is 0.45mm～0.9mm, zeolite particle diameter 0.15mm～0.45mm, haydite powder footpath is less than 0.15mm, and the particle diameter of zeroth order iron powder is 0.15mm.
Embodiment five: present embodiment adopts in-situ method, need not extract contaminated underground water out that is:, directly repairs in points of contamination.
Embodiment six: the step of present embodiment is as follows: be arranged to hollow wall with having the sewage permeation materials with function, load the renovation agent of claim within the walls, again with body of wall vertical means target stains ground, make the polluted water permeate stream through body of wall, with renovation agent reaction within the walls, removal pollutent, synoptic diagram such as accompanying drawing 1, operating parameter such as table 6.
The explanation of table 6 operating parameter
Present embodiment medium size composition and operating parameter are determined according to the underground water pollution condition.
In order to detect the repairing effect of renovation agent of the present invention to groundwater pollution of refuse landfill, test when gac, zeolite, haydite and Zero-valent Iron opaque amount proportioning are 1:1:1:1 (being designated as A) and 1:2:1:1 (being designated as D) respectively, the experiment quality is as shown in table 7
Operation result is shown in accompanying drawing 2 and accompanying drawing 3.
Percolate water quality is adopted in table 7 experiment
Accompanying drawing 2 shows that though there is fuctuation within a narrow range the experiment starting stage, the reactor operation later stage increases the reactor D of zeolite ratio to COD
CrRemoval effect more stable.The overall average that 9 days post-reactor D and reactor A are carried out in experiment is removed efficient and is respectively 78.9% and 79.6%, but the removal effect of stable post-reactor D is slightly better than reactor A.Zeolite is to COD
CrRemoval mainly be adsorption.As seen from Figure 1, in the whole experiment reactor D to COD
CrRemoval effect more stable than reactor A, this is because the outside surface of zeolite only accounts for 1% of total surface, can think that the long-pending adsorption process influence to zeolite of outer surface of zeolite is little, the adsorbed organism of its outside surface is separated adsorption desorption and is caused clearance to reduce and the amplitude of eliminating rate of absorption rise is all smaller again.
As shown in Figure 3, the reactor D that increases the zeolite ratio compares obvious enhancing to the removal effect of ammonia nitrogen with reactor A, and clearance is all the time near 100%.This is because in the silicate frame shape lattice of zeolite, its skeleton has negative charge.The Na that contains the balance skeleton negative charge in the lattice
+, K
+, Ca
2+, Mg
2+Plasma, these alkali and alkaline-earth metal ions combine with zeolite framework and insecure, very easily with ambient water solution in positively charged ion generation exchange interaction, so zeolite has very strong absorption and ion exchanging function to ammonia nitrogen.
Claims (6)
1, a kind of groundwater pollution of refuse landfill renovation agent is characterized in that it is made up of gac, zeolite, haydite and zeroth order iron powder; Wherein gac accounts for gross weight 15-20%, zeolite and accounts for that gross weight 20-40%, haydite account for gross weight 20-25%, the zeroth order iron powder accounts for gross weight 20-40%.
2, a kind of groundwater pollution of refuse landfill renovation agent according to claim 1, it is characterized in that gac account for gross weight 16～19%, zeolite account for gross weight 25～35%, haydite account for gross weight 21～24%, the zeroth order iron powder accounts for 25～35% of gross weight.
3, a kind of groundwater pollution of refuse landfill renovation agent according to claim 1, it is characterized in that gac account for gross weight 17.5%, zeolite account for gross weight 30%, haydite account for gross weight 22.5%, the zeroth order iron powder accounts for 30% of gross weight.
4, a kind of groundwater pollution of refuse landfill renovation agent according to claim 1 is characterized in that feedstock property is as follows:
The particle diameter of gac is 0.45mm～0.9mm,
Zeolite particle diameter 0.15mm～0.45mm,
Haydite powder footpath is less than 0.15mm,
The particle diameter of zeroth order iron powder is 0.15mm.
5, utilize that the described a kind of groundwater pollution of refuse landfill renovation agent of claim 1 repairs method, it is characterized in that adopting the original position repairing method, promptly repair in points of contamination.Its step is as follows: be arranged to hollow wall with having the sewage permeation materials with function, the above-mentioned renovation agent of landfill in the body of wall with body of wall vertical means target stains ground, is repaired underground water again.
6,, it is characterized in that it is 1.4-1.6g/cm that original position is repaired the above-mentioned landfill agent density of the interior filling of body of wall according to the described in-situ remediation method of claim 5
3Reparation make contaminated groundwater seepage with the velocity flow of 95-100cm/d through body of wall, with renovation agent reaction within the walls, remove pollutent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101652996A CN101428868A (en) | 2007-11-05 | 2007-11-05 | Restoration agent for groundwater pollution of refuse landfill and restoration method |
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| CNA2007101652996A CN101428868A (en) | 2007-11-05 | 2007-11-05 | Restoration agent for groundwater pollution of refuse landfill and restoration method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101613148B (en) * | 2009-07-24 | 2011-07-27 | 同济大学 | Method for removing nitrate nitrogen, corresponding combination preparation, and preparation method and application thereof |
| CN102441564A (en) * | 2011-10-14 | 2012-05-09 | 上海市环境科学研究院 | Electrokinetic remediation method of heavy metal polluted soil by composite electrodes |
| CN102515439A (en) * | 2011-12-22 | 2012-06-27 | 中国地质大学（北京） | Biological deoxidation denitrification method in oxidative environment groundwater and device thereof |
| CN105152457A (en) * | 2015-07-18 | 2015-12-16 | 常州大学 | Method for remedying hardness of groundwater |
| CN105565424A (en) * | 2016-02-03 | 2016-05-11 | 北京师范大学 | Device for insitu removing ammonia nitrogen in bank filtration water taking process |
| CN107032503A (en) * | 2016-11-18 | 2017-08-11 | 陕西科技大学 | A kind of biological respinse wall for handling percolate and its application |
| CN110526444A (en) * | 2019-08-23 | 2019-12-03 | 广州环投环境服务有限公司 | A kind of groundwater pollution of refuse landfill restorative procedure |
| CN112062280A (en) * | 2020-06-28 | 2020-12-11 | 桂林理工大学 | Combined trapezoidal ecological ditch |
| CN112408574A (en) * | 2019-08-22 | 2021-02-26 | 纳琦绿能工程有限公司 | Composite repairing agent for repairing underground water and preparation method and application thereof |
-
2007
- 2007-11-05 CN CNA2007101652996A patent/CN101428868A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101613148B (en) * | 2009-07-24 | 2011-07-27 | 同济大学 | Method for removing nitrate nitrogen, corresponding combination preparation, and preparation method and application thereof |
| CN102441564A (en) * | 2011-10-14 | 2012-05-09 | 上海市环境科学研究院 | Electrokinetic remediation method of heavy metal polluted soil by composite electrodes |
| CN102515439A (en) * | 2011-12-22 | 2012-06-27 | 中国地质大学（北京） | Biological deoxidation denitrification method in oxidative environment groundwater and device thereof |
| CN102515439B (en) * | 2011-12-22 | 2014-04-02 | 中国地质大学（北京） | Biological deoxidation denitrification method in oxidative environment groundwater and device thereof |
| CN105152457A (en) * | 2015-07-18 | 2015-12-16 | 常州大学 | Method for remedying hardness of groundwater |
| CN105565424A (en) * | 2016-02-03 | 2016-05-11 | 北京师范大学 | Device for insitu removing ammonia nitrogen in bank filtration water taking process |
| CN105565424B (en) * | 2016-02-03 | 2018-09-25 | 北京师范大学 | A kind of device removing ammonia nitrogen in situ during bank leaching water |
| CN107032503A (en) * | 2016-11-18 | 2017-08-11 | 陕西科技大学 | A kind of biological respinse wall for handling percolate and its application |
| CN112408574A (en) * | 2019-08-22 | 2021-02-26 | 纳琦绿能工程有限公司 | Composite repairing agent for repairing underground water and preparation method and application thereof |
| CN110526444A (en) * | 2019-08-23 | 2019-12-03 | 广州环投环境服务有限公司 | A kind of groundwater pollution of refuse landfill restorative procedure |
| CN112062280A (en) * | 2020-06-28 | 2020-12-11 | 桂林理工大学 | Combined trapezoidal ecological ditch |
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Open date: 20090513 |