CN103951463A - In-situ control coverage material for bottom mud of eutrophication-polluted lake, as well as preparation method thereof - Google Patents
In-situ control coverage material for bottom mud of eutrophication-polluted lake, as well as preparation method thereof Download PDFInfo
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Abstract
The invention discloses an in-situ control coverage material for the bottom mud of an eutrophication-polluted lake, as well as a preparation method thereof. The in-situ control coverage material comprises the following raw materials in parts by weight: 30-50 parts of red mud, 12-32 parts of clay, 0-42 parts of pulverized ash and 4-14 parts of foaming agent. The granular in-situ coverage material can be prepared under low-temperature sintering condition by fully recycling industrial solid wastes such as red mud in an aluminum plant, pulverized ash in a power plant in the presence of a small amount of clay and foaming agent, the granular in-situ coverage material can effectively and continuously control the release of phosphorus and COD (Chemical Oxygen Demand) in the bottom mud of the eutrophication-polluted lake to the upper covering water body, and obviously overcomes the secondary pollution caused by floating or losing along with water under the turbulence condition, so that the treatment pressure of industrial wastes can be relieved, the water pollution problem can also be effectively solved. The in-situ control coverage material is prepared from easily available raw materials, the preparation method is simple in technology and easy to operate, and very suitable for industrial production.
Description
Technical field
The present invention relates to sewage treatment area, especially a kind of eutrophication pollution bottom mud in lake in-situ control covering material and preparation method thereof.
Background technology
Water body in lake is the of paramount importance Freshwater resources of China sources, and due to high speed Economic development and huge population pressure, more than 2/3rds water body in lake of China is subjected to eutrophication pollution in various degree, and is on the rise.And bed mud is the most important storehouse of accumulating of Lakes in Nutrition material, under certain condition, its nutritive salt may become the dominant factor of lake eutrophication.Along with the increasing of China to the strict control of disposal of pollutants and lake water quality Management and Protection dynamics; exogenous nitrogen, phosphorus, COD(organic matter) etc. the input of nutritive substance slowly controlled, and the secondary pollution that its internal loading causes will become the important sources of body eutrophication.And many facts and studies have shown that, sediment pollution impact is more serious, and it is administered to being necessary property and urgency.
It is current a kind of sediment pollution control techniques in widespread attention that bed mud covers, and is polluted bed mud recovery technique and based technique for in-situ remediation important component part.It is the most effectively one of measure of control of polluted-water endogenous pollution control that bed mud covers, and because it pollutes the impact of controlling effect and less water ecological setting preferably, is at home and abroad used widely.It is the selection of covering material that bed mud covers the core of processing, and mainly contains at present following covering material:
The most conventional is inert materials such as natural sand, gravel and limestone particle mineral, although these material sources are extensive, easy to use, due to its poor absorption fixed performance, lower pollution controlling efficiency, and very easily lost efficacy, there is obvious limitation.Although natural zeolite (a kind of aluminosilicate mineral that nature extensively exists), there is size distribution, inner larger porosity and more superior cationic exchange and physical adsorption performance more widely, but mainly nitrogen (being mainly ammonia nitrogen) is had to good absorption property, to the aspect such as phosphorus and COD not obvious.
The covering materials such as clean bed mud, soil, water purification mud and modified clay mineral, Zero-valent Iron etc. are material modified, although have superior controllability to the release of the pollutents such as Nitrogen In Sediment phosphorus, organic matter.But because its particle diameter is less, under the perturbation actions such as stormy waves, vortex, hydrocoles and bed mud anaerobism term, easily there is floating or outflow with water and cause the problem of secondary pollution, significant limitation the use of this capstock.
In addition, use in addition the artificial fabric such as cement, geotextile can significantly change Sediments physicochemical character, the normal water ecosystem of havoc as bed mud covering material.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of eutrophication pollution bottom mud in lake in-situ control covering material and preparation method thereof, it can be very effective and lasting control eutrophic pollution bottom mud in lake in phosphorus and COD to the release of overlying water, obviously overcome simultaneously and under disturbed conditions, easily occurred floating or outflow with water and cause the problem of secondary pollution, to overcome the deficiencies in the prior art.
The present invention is achieved in that eutrophication pollution bottom mud in lake in-situ control covering material, calculates by weight, comprises red mud 30-50 part, clay 12-32 part, flyash 0-42 part and whipping agent 4-14 part.
Calculate by weight, comprise 38.9 parts of red muds, 14.4 parts of clays, 7.8 parts of 38.9 parts, flyash and whipping agents.
The preparation method of eutrophication pollution bottom mud in lake in-situ control covering material, is characterized in that: comprise the steps:
A) by above-mentioned parts by weight, get red mud, clay, flyash, whipping agent, add clear water after mixing and stirring to plastic limit value, formation situ capping materials slip;
B) use tablets press that situ capping materials slip is carried out to granulation, the spherical particle that acquisition particle diameter is 0.5-5cm, by air-dry spherical particle natural curing;
C) by the spherical particle after air-dry in sintering oven, roasting 1.5-2 hour at 900-1100 DEG C.
Also have a kind of scheme to be, by the situ capping materials slip of making in step a) by the making method of clay brick, in brickkiln, roasting 1.5-2 hour at 900-1100 DEG C, it is 0.5-5cm that the product of sintering is crushed to particle diameter.
Carrying out before step a), first that red mud is air-dry, and be crushed to below 2mm; Clay is crushed to below 2mm.
Red mud, flyash are a large amount of major industry solid waste that exist of China's present stage, its wide material sources, and volume of cargo in storage is huge.Because output is huge and resource utilization degree is inadequate, a considerable amount of all stackings on the spot, have taken a large amount of soils, affect ecoscape, have obvious environmental ecology risk simultaneously.Red mud is a kind of clay mineral that is rich in silico-aluminate, has superior ion-exchange and absorption property, and the Al that contains high-content and Ca, and the phosphorus in waste water is presented and superior absorption property.Flyash is porous honeycomb tissue, containing certain active group, has the features such as the large and adsorptive power of surface-area is stronger.The present invention carries out recycling to them, has good environmental benefit and ecological benefits.
Compared with prior art, the Industrial Solid Wastes such as the abundant recycling of the present invention aluminium manufacturer's red mud and fly ash in electric power plant, add a small amount of clay and whipping agent, under low-temperature sintering condition, prepare particulate state situ capping materials, it can be very effective and lasting control eutrophic pollution bottom mud in lake in phosphorus and COD to the release of overlying water, obviously overcome simultaneously and under disturbed conditions, easily occurred floating or outflow with water and cause the problem of secondary pollution, both alleviated the processing pressure of industrial waste, also effective water pollution problems that solved.Material source of the present invention is extensive, and preparation method's technique is simple, easy to operate, and very suitability for industrialized is produced.
Embodiment
Embodiments of the invention 1: the preparation of eutrophication pollution bottom mud in lake in-situ control covering material, by the Bayer process red mud of autoxidation aluminium manufacturer, air-dry, being crushed to 2mm uses below, flyash is taken from coal-burning power plant's dry discharge fly ash, directly use, clay picks up from the red-yellow clay of extensive distribution, is crushed to 2mm and uses below; Calcium carbonate (whipping agent) uses commercially available prod;
A) get 71.4 parts of red muds, 21.4 parts of clays, 0 part, flyash, 7.2 parts, calcium carbonate, add clear water after mixing and stirring to plastic limit value, form situ capping materials slip;
B) use tablets press that situ capping materials slip is carried out to granulation, the spherical particle that acquisition particle diameter is 1cm, by air-dry spherical particle natural curing;
C) by the spherical particle after air-dry in sintering oven, roasting 1.8 hours at 1000 DEG C.
Embodiments of the invention 2: preparation method is same implements 1, wherein, 62.5 parts of red muds, 31.3 parts of clays, 0 part, flyash, 6.3 parts, calcium carbonate.
Embodiments of the invention 3: preparation method is same implements 1, wherein, 41.7 parts of red muds, 12.5 parts of clays, 41.7 parts, flyash, 4.2 parts, calcium carbonate.
Embodiments of the invention 4: preparation method is same implements 1, wherein, 66.7 parts of red muds, 20.0 parts of clays, 0 part, flyash, 13.3 parts, calcium carbonate.
Embodiments of the invention 5: preparation method is same implements 1, wherein, 47.3 parts of red muds, 19.8 parts of clays, 28.2 parts, flyash, 4.7 parts, calcium carbonate.
Embodiments of the invention 6: preparation method is same implements 1, wherein, 63.3 parts of red muds, 26.6 parts of clays, 0 part, flyash, 10.1 parts, calcium carbonate.
Embodiments of the invention 7: preparation method is same implements 1, wherein, 48.6 parts of red muds, 14.6 parts of clays, 29 parts, flyash, 7.8 parts, calcium carbonate.
Embodiments of the invention 8: preparation method is same implements 1, wherein, 38.9 parts of red muds, 14.4 parts of clays, 38.9 parts, flyash, 7.8 parts, calcium carbonate.
Embodiments of the invention 9: preparation method is same implements 1, wherein, 48.7 parts of red muds, 24.3 parts of clays, 17.3 parts, flyash, 9.7 parts, calcium carbonate.
Embodiments of the invention 10: preparation method is same implements 1, wherein, 37.9 parts of red muds, 19.0 parts of clays, 37.9 parts, flyash, 5.1 parts, calcium carbonate.
The product of embodiment 1-10 is tested, and experiment adopts 1000mL graduated cylinder to make simulator, and the bed mud that 3-5cm is thick is spread in bottom, injects gently lake water as overlying water until scale marks, the disturbance water body of trying not while adding water along tube wall.Then add the covering material of 40-50g, each material arrange two parallel.Every day, vertical disturbance three times continued about 15 seconds at every turn.Every 4d samples once, continues 5 times, and every sub-sampling 150mL left and right supplements the lake water of same volume simultaneously.
Embodiment 11: proportioning raw materials is with embodiment 5, experimental installation is diameter 26cm, the high plexi-glass tubular for 168cm, and the bed mud of thick about 10cm is spread in bottom, injects the water body of human configuration until the mouth of pipe (is western suburb, Guiyang water factory tap water, intake is positioned at sample region, adds a little NaH
2pO
4.2H
2o and NH
4cl).Every 2d gets a sample and measures, and the 18th day time, finishes.Day part does not all detect TP, to the control effect of COD in table 4.
Embodiment 12: proportioning raw materials is with embodiment 8, and research method is with embodiment 11.Only within the 12nd day, detect TP(0.01mgL
-1), to the control effect of COD in table 4.
Known according to table 2-table 4, bed mud can be cut down total phosphorus and chemical oxygen demand (COD) in overlying water after covering.For total phosphorus, more the overlying water after bed mud covers shows as and does not detect or low detecting, and water quality is more stable; Control group show as concentration higher, fluctuation larger, considerably beyond body eutrophication limit value.For chemical oxygen demand (COD), after bed mud covers, the chemical oxygen demand (COD) of overlying water is many at 30 mgL
-1especially 20 mgL
-1in, meet water environment quality standard (GB3838-2002) III class even better; And the chemical oxygen demand (COD) of control group is much in 50 mgL
-1, water quality is more bad and unstable.Result shows that material 8 is for optimum formula, it can realize the reduction target to total phosphorus and chemical oxygen demand (COD), and keep overlying water water conditioning, and adopt this soverlay technique can obtain good effect, to eutrophic lake sediment pollution, control has broad application prospects.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also change and revise above-mentioned embodiment.Therefore, the present invention is not limited to embodiment disclosed and described above, also should fall in the scope of claim of the present invention modifications and changes more of the present invention.In addition,, although used some specific terms in the present invention, these terms just for convenience of description, do not form any restriction to the present invention.
Claims (5)
1. an eutrophication pollution bottom mud in lake in-situ control covering material, is characterized in that: calculate by weight, comprise red mud 30-50 part, clay 12-32 part, flyash 0-42 part and whipping agent 4-14 part.
2. eutrophication pollution bottom mud in lake in-situ control covering material according to claim 1, is characterized in that: calculate by weight, comprise 38.9 parts of red muds, 14.4 parts of clays, 7.8 parts of 38.9 parts, flyash and whipping agents.
3. a preparation method for eutrophication pollution bottom mud in lake in-situ control covering material as claimed in claim 1, is characterized in that: comprise the steps:
A) by above-mentioned parts by weight, get red mud, clay, flyash, whipping agent, add clear water after mixing and stirring to plastic limit value, formation situ capping materials slip;
B) use tablets press that situ capping materials slip is carried out to granulation, the spherical particle that acquisition particle diameter is 0.5-5cm, by air-dry spherical particle natural curing;
C) by the spherical particle after air-dry in sintering oven, roasting 1.5-2 hour at 900-1100 DEG C.
4. eutrophication pollution bottom mud in lake in-situ control covering material according to claim 1, it is characterized in that: by the situ capping materials slip of making in step a) by the making method of clay brick, in brickkiln, roasting 1.5-2 hour at 900-1100 DEG C, it is 0.5-5cm that the product of sintering is crushed to particle diameter.
5. eutrophication pollution bottom mud in lake in-situ control covering material according to claim 3, is characterized in that: carrying out before step a), first that red mud is air-dry, and be crushed to below 2mm; Clay is crushed to below 2mm.
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| CN201410199169.4A CN103951463B (en) | 2014-05-13 | 2014-05-13 | Eutrophication pollution bottom mud in lake in-situ control covers material and preparation method thereof |
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| CN201410199169.4A CN103951463B (en) | 2014-05-13 | 2014-05-13 | Eutrophication pollution bottom mud in lake in-situ control covers material and preparation method thereof |
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| CN103951463B CN103951463B (en) | 2016-08-17 |
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Cited By (9)
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| CN106241933A (en) * | 2016-08-02 | 2016-12-21 | 华中农业大学 | A kind of red mud composite and its preparation method and application |
| WO2017103553A1 (en) * | 2015-12-18 | 2017-06-22 | Red Media Technologies Lmited | Red mud pellets |
| CN107262024A (en) * | 2017-06-07 | 2017-10-20 | 常州市海若纺织品有限公司 | A kind of bed mud lock phosphorus covering material and preparation method thereof |
| CN107337430A (en) * | 2017-07-17 | 2017-11-10 | 郑州碧优特环保科技有限公司 | With the method for aluminium manufacturer's red mud, titanium powder plant waste residue and straw production water-permeable brick |
| CN107486139A (en) * | 2017-10-10 | 2017-12-19 | 成都理工大学 | Original position covering suppresses the function soil and its application method of black and odorous water sedimentary phosphate release |
| CN110075787A (en) * | 2019-04-15 | 2019-08-02 | 贵州工程应用技术学院 | A kind of eutrophication basin bed mud control method |
| CN110734202A (en) * | 2019-09-30 | 2020-01-31 | 哈尔滨工业大学（深圳） | river channel black and odorous bottom mud repairing and utilizing method |
| CN112456942A (en) * | 2020-11-20 | 2021-03-09 | 贵州大学 | Preparation method of high-sulfur coal gangue storage yard continuous alkali production permeable curtain material |
| CN113105165A (en) * | 2021-03-02 | 2021-07-13 | 山西农业大学 | Ecological slope protection material and preparation method thereof |
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| CN101021062A (en) * | 2007-02-15 | 2007-08-22 | 陈建庭 | Stereo in-situ ecological urban water system repairing process |
| CN101323497A (en) * | 2008-05-19 | 2008-12-17 | 昆明理工大学 | Deposit masking method of eutrophicated water restoration |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017103553A1 (en) * | 2015-12-18 | 2017-06-22 | Red Media Technologies Lmited | Red mud pellets |
| CN106241933A (en) * | 2016-08-02 | 2016-12-21 | 华中农业大学 | A kind of red mud composite and its preparation method and application |
| CN106241933B (en) * | 2016-08-02 | 2019-06-11 | 华中农业大学 | A kind of red mud composite material and preparation method and application |
| CN107262024A (en) * | 2017-06-07 | 2017-10-20 | 常州市海若纺织品有限公司 | A kind of bed mud lock phosphorus covering material and preparation method thereof |
| CN107337430A (en) * | 2017-07-17 | 2017-11-10 | 郑州碧优特环保科技有限公司 | With the method for aluminium manufacturer's red mud, titanium powder plant waste residue and straw production water-permeable brick |
| CN107486139A (en) * | 2017-10-10 | 2017-12-19 | 成都理工大学 | Original position covering suppresses the function soil and its application method of black and odorous water sedimentary phosphate release |
| CN110075787A (en) * | 2019-04-15 | 2019-08-02 | 贵州工程应用技术学院 | A kind of eutrophication basin bed mud control method |
| CN110734202A (en) * | 2019-09-30 | 2020-01-31 | 哈尔滨工业大学（深圳） | river channel black and odorous bottom mud repairing and utilizing method |
| CN112456942A (en) * | 2020-11-20 | 2021-03-09 | 贵州大学 | Preparation method of high-sulfur coal gangue storage yard continuous alkali production permeable curtain material |
| CN112456942B (en) * | 2020-11-20 | 2022-07-01 | 贵州大学 | Preparation method of high-sulfur coal gangue storage yard continuous alkali production permeable curtain material |
| CN113105165A (en) * | 2021-03-02 | 2021-07-13 | 山西农业大学 | Ecological slope protection material and preparation method thereof |
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| CN103951463B (en) | 2016-08-17 |
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