CN103951463B - Eutrophication pollution bottom mud in lake in-situ control covers material and preparation method thereof - Google Patents
Eutrophication pollution bottom mud in lake in-situ control covers material and preparation method thereof Download PDFInfo
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- CN103951463B CN103951463B CN201410199169.4A CN201410199169A CN103951463B CN 103951463 B CN103951463 B CN 103951463B CN 201410199169 A CN201410199169 A CN 201410199169A CN 103951463 B CN103951463 B CN 103951463B
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Abstract
The invention discloses a kind of eutrophication pollution bottom mud in lake in-situ control and cover material and preparation method thereof, calculate by weight, including red mud 30 50 parts, clay 12 32 parts, 0 42 parts of flyash and foaming agent 4 14 parts.The Industrial Solid Wastes such as the present invention abundant recycling aluminium manufacturer's red mud and fly ash in electric power plant, add a small amount of clay and foaming agent, under the conditions of low-temperature sintering, prepare graininess situ capping materials, in the control eutrophic pollution bottom mud in lake that its energy is highly effective and lasting, phosphorus and COD are to the release of overlying water, substantially overcome the problem easily occurring under disturbed conditions floating or outflowing with water and cause secondary pollution simultaneously, both alleviate the processing pressure of industrial waste, the most effective solve water pollution problems.Material source of the present invention is extensive, and preparation method technique simply, easily operate, is particularly suitable for industrialized 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 covers material
And preparation method thereof.
Background technology
Water body in lake is China's of paramount importance freshwater resources sources, due to high speed economic development and huge population pressure,
The water body in lake of China more than 2/3rds is subjected to eutrophication pollution in various degree, and is on the rise.And bed mud is lake
The most important accumulation storehouse of pool nutrient substance, under certain condition, its nutritive salt is likely to become the dominant factor of lake eutrophication.
Along with China's control strict to disposal of pollutants and lake water quality manage the increasing with protection, exogenous nitrogen, phosphorus, COD(are organic
Matter) etc. the input of nutrient substance the most slowly controlled, and the secondary pollution that its internal loading is caused will become water body richness battalion
The important sources of fosterization.And all multiple fact and research prove, sediment pollution impact is more serious, to its carry out being necessary property of improvement and
Urgent.
It is a kind of sediment pollution the controls technology being now subjected to extensively pay attention to that bed mud covers, be polluted bed mud recovery technique with
Based technique for in-situ remediation important component part.Bed mud cover be polluted-water endogenous pollution control maximally efficient control measure it
One, due to its preferable Environmental capacity effect and the impact of less water ecological setting, at home and abroad it is used widely.The end
The core of mud covering treatment is to cover the selection of material, currently mainly has a following covering material:
The most conventional is the inert materials such as natural sand, gravel and limestone particle mineral, although these material sources
Extensively, easy to use, but due to its poor absorption fixed performance, relatively low Environmental capacity efficiency, and easily lost efficacy, have substantially
Limitation.Although natural zeolite (a kind of aluminosilicate mineral that nature is widely present), have the distribution of wide particle diameter,
Internal larger porosity and advantageous cation exchange and physical absorption performance, but mainly have nitrogen (mainly ammonia nitrogen) preferably
Absorption property, to the aspect such as phosphorus and COD inconspicuous.
The covering materials such as cleaning bed mud, soil, clean water sludge and modified clay mineral, Zero-valent Iron etc. are material modified, though
So the release to pollutant such as Nitrogen In Sediment phosphorus, organic matters has superior control ability.But owing to its particle diameter is less, at wind
Under the perturbation actions such as wave, vortex, aquatic animal and bed mud anaerobism term, easily occur floating or outflowing with water and cause secondary dirty
The problem of dye, hence it is evident that limit the use of this capstock.
Additionally, also use the artificial fabric such as cement, geotextiles to cover material as bed mud can significantly change Sediments
Physicochemical character, the normal water ecosystem of heavy damage.
Summary of the invention
The technical problem to be solved is to provide a kind of eutrophication pollution bottom mud in lake in-situ control and covers material
Material and preparation method thereof, in the control eutrophic pollution bottom mud in lake that it can be highly effective and lasting, phosphorus and COD are to overlying water
Release, substantially overcome simultaneously and easily occur under disturbed conditions floating or outflowing with water and cause the problem of secondary pollution, with
Overcome the deficiencies in the prior art.
The present invention is achieved in that eutrophication pollution bottom mud in lake in-situ control covers material, counts by weight
Calculate, including red mud 30-50 part, clay 12-32 part, flyash 0-42 part and foaming agent 4-14 part.
Calculate by weight, including red mud 38.9 parts, clay 14.4 parts, 38.9 parts of flyash and foaming agent 7.8 parts.
Eutrophication pollution bottom mud in lake in-situ control covers the preparation method of material, it is characterised in that: include walking as follows
Rapid:
A) by above-mentioned parts by weight, taking red mud, clay, flyash, foaming agent, after adding clear water, mixing and stirring is to plastic limit
It is worth, forms situ capping materials slip；
B) use comminutor that situ capping materials slip is carried out pelletize, it is thus achieved that particle diameter is the spherical particle of 0.5-5cm, will
Spherical particle natural curing air-dries；
C) will air-dry after spherical particle in sintering furnace, roasting 1.5-2 hour at 900-1100 DEG C.
A kind of scheme is also had to be, by the situ capping materials slip that makes in step a) by the manufacture 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.
Before carrying out step a), first red mud is air-dried, and be crushed to below 2mm；Clay is crushed to below 2mm.
Red mud, flyash are the key industry solid waste that China exists in a large number present stage, its wide material sources, store up
Measure huge.Owing to yield is huge and resource utilization degree is inadequate, a considerable amount of stack the most on the spot, taken a large amount of soil,
Affect ecoscape, there is obvious environmental ecology risk simultaneously.Red mud is a kind of clay mineral rich in aluminosilicate, has
Superior ion exchange and absorption property, and Al and Ca containing high-load, present and superior the phosphorus in waste water
Absorption property.Flyash is porous honeycomb tissue, containing certain active group, has that surface area is big and absorbability is stronger etc.
Feature.The present invention carries out recycling to them, has preferable environmental benefit and ecological benefits.
Compared with prior art, the Industrial Solid Waste such as the present invention abundant recycling aluminium manufacturer's red mud and fly ash in electric power plant, add
Adding a small amount of clay and foaming agent, under the conditions of low-temperature sintering, prepare graininess situ capping materials, its energy is highly effective and holds
Continuous control phosphorus and COD in eutrophic pollution bottom mud in lake, to the release of overlying water, substantially overcome under disturbed conditions simultaneously
Easily occur floating or outflowing with water and cause the problem of secondary pollution, both alleviated the processing pressure of industrial waste, the most effectively
Solve water pollution problems.Material source of the present invention is extensive, and preparation method technique simply, easily operate, is particularly suitable for industrialization
Produce.
Detailed description of the invention
Embodiments of the invention 1: eutrophication pollution bottom mud in lake in-situ control covers the preparation of material, by self-alumina
The Bayer process red mud of factory, air-dries, is crushed to 2mm used below, and flyash takes from coal-burning power plant's dry discharge fly ash, directly uses,
Clay picks up from widely distributed red-yellow clay, is crushed to 2mm used below；Calcium carbonate (foaming agent) uses commercially available prod；
A) take red mud 71.4 parts, clay 21.4 parts, 0 part of flyash, calcium carbonate 7.2 parts, add mixing and stirring after clear water
To plastic limit value, form situ capping materials slip；
B) use comminutor that situ capping materials slip is carried out pelletize, it is thus achieved that particle diameter is the spherical particle of 1cm, by spherical
Granule natural curing air-dries；
C) will air-dry after spherical particle in sintering furnace, roasting 1.8 hours at 1000 DEG C.
Embodiments of the invention 2: same to 1, wherein, red mud 62.5 parts of implementing of preparation method, clay 31.3 parts, 0 part of flyash,
Calcium carbonate 6.3 parts.
Embodiments of the invention 3: preparation method is with implementing 1, wherein, red mud 41.7 parts, clay 12.5 parts, flyash 41.7
Part, calcium carbonate 4.2 parts.
Embodiments of the invention 4: same to 1, wherein, red mud 66.7 parts of implementing of preparation method, clay 20.0 parts, 0 part of flyash,
Calcium carbonate 13.3 parts.
Embodiments of the invention 5: preparation method is with implementing 1, wherein, red mud 47.3 parts, clay 19.8 parts, flyash 28.2
Part, calcium carbonate 4.7 parts.
Embodiments of the invention 6: same to 1, wherein, red mud 63.3 parts of implementing of preparation method, clay 26.6 parts, 0 part of flyash,
Calcium carbonate 10.1 parts.
Embodiments of the invention 7: preparation method is with implementing 1, wherein, red mud 48.6 parts, clay 14.6 parts, flyash 29
Part, calcium carbonate 7.8 parts.
Embodiments of the invention 8: preparation method is with implementing 1, wherein, red mud 38.9 parts, clay 14.4 parts, flyash 38.9
Part, calcium carbonate 7.8 parts.
Embodiments of the invention 9: preparation method is with implementing 1, wherein, red mud 48.7 parts, clay 24.3 parts, flyash 17.3
Part, calcium carbonate 9.7 parts.
Embodiments of the invention 10: preparation method is with implementing 1, wherein, red mud 37.9 parts, clay 19.0 parts, flyash
37.9 parts, calcium carbonate 5.1 parts.
Being tested by the product of embodiment 1-10, experiment uses 1000mL graduated cylinder to make analog, and 3-5cm is spread in bottom
Thick bed mud, injects lake water gently as overlying water until graduation mark, disturbance water body of trying not when adding water along tube wall.Then add
Enter the covering material of 40-50g, each material arrange two parallel.Every day, vertical disturbance three times, continued about 15 seconds every time.Often
4d samples once, continues 5 times, every sub-sampling about 150mL, supplements the lake water of same volume simultaneously.
Embodiment 11: proportioning raw materials is with embodiment 5, and experimental provision is diameter about 26cm, the lucite of a height of 168cm
Pipe, bottom spreads the bed mud of thick about 10cm, inject the water body of human configuration until the mouth of pipe (for western suburb, Guiyang water factory tap water,
Intake is positioned at sample region, adds a little NaH2PO4.2H2O and NH4Cl).Every 2d takes a sample and measures, and terminates when the 18th day.Respectively
Period does not all detect TP, and the control effect of COD is shown in Table 4.
Embodiment 12: proportioning raw materials is with embodiment 8, and research method is with embodiment 11.Only the 12nd day detection TP(0.01mg
L-1), the control effect of COD is shown in Table 4.
Understanding according to table 2-table 4, bed mud can cut down total phosphorus and COD in overlying water after covering.For total phosphorus,
Overlying water after bed mud covers shows as not detecting or low detection more, and water quality is more stable；Matched group then shows as concentration
Higher, fluctuation is relatively big, considerably beyond body eutrophication limit value.For COD, overlying water after bed mud covering
COD is many at 30 mg L-1Especially 20 mg L-1Within, meet water environment quality standard (GB3838-
2002) III class is even better；And the COD of matched group is more than 50 mg L more-1, water quality is more bad and unstable.Result table
Bright material 8 is optimum formula, and it can realize the reduction target to total phosphorus and COD, and keeps overlying water water quality steady
Fixed, use this soverlay technique can obtain preferable effect, before controlling to have wide application to eutrophic lake sediment pollution
Scape.
The announcement of book and teaching according to the above description, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula changes and revises.Therefore, the invention is not limited in detailed description of the invention disclosed and described above, to the present invention's
Some modifications and changes also should fall in the range of the claim of the present invention.Although additionally, it is special that some are employed herein
Fixed term, but these terms are merely for convenience of description, and the present invention does not constitute any restriction.
Claims (5)
1. an eutrophication pollution bottom mud in lake in-situ control covers material, it is characterised in that: calculate by weight, including
Red mud 30-50 part, clay 12-32 part, flyash 0-42 part and foaming agent 4-14 part.
Eutrophication pollution bottom mud in lake in-situ control the most according to claim 1 covers material, it is characterised in that: by weight
Amount number calculates, including red mud 38.9 parts, clay 14.4 parts, 38.9 parts of flyash and foaming agent 7.8 parts.
3. eutrophication pollution bottom mud in lake in-situ control as claimed in claim 1 covers a preparation method for material, its
It is characterised by: comprise the steps:
A) by above-mentioned parts by weight, taking red mud, clay, flyash, foaming agent, after adding clear water, mixing and stirring is to plastic limit value i.e.
Can, form situ capping materials slip；
B) use comminutor that situ capping materials slip is carried out pelletize, it is thus achieved that particle diameter is the spherical particle of 0.5-5cm, by spherical
Granule natural curing air-dries；
C) will air-dry after spherical particle in sintering furnace, roasting 1.5-2 hour at 900-1100 DEG C.
Preparation method the most according to claim 3, it is characterised in that: the situ capping materials slip that will make in step a)
By the manufacture method of clay brick, in brickkiln, roasting 1.5-2 hour at 900-1100 DEG C, the product of sintering is crushed to particle diameter
For 0.5-5cm.
Preparation method the most according to claim 3, it is characterised in that: before carrying out step a), first red mud is air-dried, and
It is crushed to below 2mm；Clay is crushed to below 2mm.
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| Application Number | Priority Date | Filing Date | Title |
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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 true CN103951463B (en) | 2016-08-17 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017103553A1 (en) * | 2015-12-18 | 2017-06-22 | Red Media Technologies Lmited | Red mud pellets |
| 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 |
| 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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| 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 |
| CN101665278A (en) * | 2008-09-05 | 2010-03-10 | 中国科学院生态环境研究中心 | Compound phosphorus removal flocculating agent for water treatment |
| CN102701552A (en) * | 2012-06-21 | 2012-10-03 | 南京大学 | Covering material for immobilized in-situ remediation of nitrogen in bottom sediment and preparation method thereof |
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Patent Citations (4)
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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 |
| CN101665278A (en) * | 2008-09-05 | 2010-03-10 | 中国科学院生态环境研究中心 | Compound phosphorus removal flocculating agent for water treatment |
| CN102701552A (en) * | 2012-06-21 | 2012-10-03 | 南京大学 | Covering material for immobilized in-situ remediation of nitrogen in bottom sediment and preparation method thereof |
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